CN102593937A - Power conversion circuit - Google Patents
Power conversion circuit Download PDFInfo
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- CN102593937A CN102593937A CN2011100068871A CN201110006887A CN102593937A CN 102593937 A CN102593937 A CN 102593937A CN 2011100068871 A CN2011100068871 A CN 2011100068871A CN 201110006887 A CN201110006887 A CN 201110006887A CN 102593937 A CN102593937 A CN 102593937A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
Abstract
The invention relates to a power conversion circuit, which uses a control module to control a pulse wave regulating circuit to regulate the duty cycle of a direct-current/direct-current converter according to the output voltage and the output current of a renewable energy power supply device and the direct-current chain voltage of the direct-current/direct-current converter. Moreover, the power conversion circuit uses the control module to control the pulse wave regulating circuit to regulate the duty cycle of a direct-current/alternating-current converter according to the output voltage and the output current of the renewable energy power supply device, the direct-current chain voltage of the direct-current/direct-current converter and the output voltage of a mains supply device.
Description
Technical field
The present invention relates to a kind of civil power parallel technology, particularly relate to a kind of power conversion circuit that is applied to the parallel regeneration energy resource system of civil power.
Background technology
The renewable energy resources (Renewable energy) are meant in theory can inexhaustible natural resources, and for example be solar energy, wind energy, geothermal energy, hydraulic energy, tidal energy, give birth to mass-energy etc., all be to transform natural energy to become the energy.Let mankind's Sustainable Development on earth,, become the important industry development policies that sophisticated technologies country takes into account generating and environmental protection the general people's livelihood power supply of converting into of renewable energy resources efficient and cost-effective.
In the green regenerating energy resource system, the civil power parallel technology has been played the part of important role.Civil power parallel technology whereby when the power shortage of being sent when renewable energy resources electric supply installation is supplied with fault to supply with load or renewable energy resources electric supply installation, can come supply capability to give load by the mains power supply.Wherein, the power shortage of being sent when renewable energy resources electric supply installation is when supplying with load and coming the electric power of undersupply by the mains power supply, and this moment, the phase place and the frequency of the output voltage of transducer then must be consistent with civil power between the two.In addition, after electric power that renewable energy resources electric supply installation sends is being supplied to load still too much the time, but then feedback gives Utilities Electric Co..
Fig. 1 is the summary structural representation of the parallel regeneration energy resource system of a kind of civil power of existing convention.
See also Fig. 1, the parallel regeneration energy resource system of civil power of existing convention comprises: renewable energy resources electric supply installation 10, power conversion circuit 20, mains power supply 30 and load 40.
The renewable energy resources that DC-DC converter 210 reception renewable energy resources electric supply installations 10 are produced also convert thereof into stable and fixing direct current power.AC/DC converter 220 converts the direct current power of DC-DC converter 210 outputs into alternating electromotive force.Controller 24 is in order to the running of control renewable energy resources electric supply installation 10, DC-DC converter 210, AC/DC converter 220 and output circuit 230.Output circuit 230 can offer load 40 with alternating electromotive force and/or civil power according to the control of controller 24.
In the civil power parallel technology, the detecting of the position, angle of the alternating electromotive force of AC/DC converter 220 outputs and the position, angle of civil power is its efficient key index.Traditional angle position detecting technology can be divided into zero point detection circuit and digital phase locked loop.Yet the cost of zero point detection circuit is higher and disturbed easily and cause the erroneous judgement of position, angle.Though the response speed of digital phase locked loop is fast and precision is good, the design of controller but is being not easy very.
This shows that above-mentioned existing civil power parallel technology obviously still has inconvenience and defective, and demands urgently further improving in method and use.In order to solve the problem of above-mentioned existence; Relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly; But do not see always that for a long time suitable design is developed completion, and conventional method does not have appropriate method to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of new power conversion circuit, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Summary of the invention
Main purpose of the present invention is; Overcome the defective that existing civil power parallel technology exists; And a kind of new power conversion circuit, technical problem to be solved are provided is to adopt electric current loop circuit control method to carry out the running control of DC-DC converter, and adopts outer circulation voltage loop circuit control method and interior circulating current loop circuit control method to carry out the running control of AC/DC converter; So as to significantly being reduced in the volume of hardware circuit, be very suitable for practicality.
The object of the invention and solve its technical problem and adopt following technical scheme to realize.It that proposes according to power conversion circuit of the present invention comprises: one first receiving terminal, in order to electrically connect a regeneration energy resource power supply; One second receiving terminal is in order to receive a civil power; One load end is in order to electrically connect a load; One DC-DC converter, the input of this DC-DC converter are electrically connected to this first receiving terminal, to transfer the output voltage of this renewable energy resources electric supply installation to a stable direct current chain voltage corresponding to work period of one first modulating signal; One direct current/alternating-current converter; The input of this AC/DC converter is electrically connected to the output of this DC-DC converter, to receive this direct current chain voltage and to become one to exchange chain voltage this direct current chain voltage transitions corresponding to work period of one second modulating signal; One output circuit is electrically connected to output, this second receiving terminal and this load end of this AC/DC converter, supplies with this load electric to be exchanged one in chain voltage and this civil power by this; One feedback circuit; Electrically connect this output of this first receiving terminal, this DC-DC converter, this output and this second receiving terminal of this AC/DC converter, to feedback corresponding to one first feedback signal of this output voltage of this renewable energy resources electric supply installation, corresponding to one second feedback signal of the output current of this renewable energy resources electric supply installation, corresponding to one the 3rd feedback signal of this direct current chain voltage of this DC-DC converter, corresponding to one the 4th feedback signal of the output current of this AC/DC converter and one the 5th feedback signal corresponding to the output voltage of this civil power; One circuit for detecting is electrically connected to this feedback circuit, to receive the 5th feedback signal and to carry out computing to obtain one jiao of position of this civil power based on the 5th feedback signal; One control module; Be electrically connected to this feedback circuit and this circuit for detecting; With according to this position, angle with the 4th feedback signal and the 5th feedback signal from converting into rotor coordinate representation with two stator coordinate representations, export one first control signal according to this first feedback signal, this second feedback signal and the 3rd feedback signal, and export one second control signal according to this first feedback signal, this second feedback signal, the 3rd feedback signal and with the 4th feedback signal and the 5th feedback signal of this rotor coordinate representation; And a pulse wave regulating circuit, be electrically connected to this control module, in order to according to this this first modulating signal of first control signal output, and according to this this second modulating signal of second control signal output.
The object of the invention and solve its technical problem and also can adopt following technical measures further to realize.
Aforesaid power conversion circuit, wherein said this circuit for detecting comprises: a second order digital quadrature transducer is electrically connected to this feedback circuit, to receive the 5th feedback signal and to produce and the synchronous string ripple of this civil power according to this; And an arctangent computation unit, be electrically connected between this second order digital quadrature transducer and this control module, to calculate this position, angle of this civil power whereby with this synchronous string ripple of this civil power.
Aforesaid power conversion circuit, wherein said this control module comprises: a coordinate transformation unit, in order to according to this position, angle with the 4th feedback signal and the 5th feedback signal from converting into stator coordinate representation with two rotor coordinate representations; One first controller is in order to export this first control signal according to this first feedback signal, this second feedback signal and the 3rd feedback signal; And one second controller, in order to according to this first feedback signal, this second feedback signal, the 3rd feedback signal, with the 4th feedback signal and the 5th feedback signal and this second control signal of this position, angle output of this stator coordinate representation.
Aforesaid power conversion circuit, wherein said this first controller comprises: a subtracter, in order to a current command value and this second feedback signal are subtracted each other; One current regulator is in order to regulate the output valve of this subtracter; One summer, in order to the output valve of this current regulator and the 3rd feedback signal mutually adduction deduct this first feedback signal; And a reciprocator, in order to the 3rd feedback signal is converted into reciprocal to produce this first control signal through output valve according to this summer.
Aforesaid power conversion circuit; Wherein said the 5th feedback signal with this stator coordinate representation comprises a q axle the 5th feedback signal and a d axle the 5th feedback signal; And this second controller comprises: a power compensating unit, in order to produce an input offset value according to this first feedback signal, this second feedback signal and this d axle the 5th feedback signal; One d axle control unit is in order to according to the 3rd feedback signal, this input offset value, produce a d axle control command with the 4th feedback signal and this d axle the 5th feedback signal of this stator coordinate representation; One q axle control unit is in order to produce a q axle control command according to the 4th feedback signal with this stator coordinate representation with this q axle the 5th feedback signal; One coordinate inverse transform unit is in order to produce a control command with this two spool rotor coordinate representations with this d axle control command and this q axle control command from converting into these two rotor coordinate representations with this stator coordinate representation according to this position, angle; And an arithmetic element, in order to receive with this control command of these two rotor coordinate representations and according to carrying out computing to produce this second control signal with this control command of these two rotor coordinate representations.
Aforesaid power conversion circuit; Wherein said the 4th feedback signal with this stator coordinate representation comprises a q axle the 4th feedback signal and a d axle the 4th feedback signal; And this d axle control unit comprises: a subtracter, in order to the 3rd feedback signal and a voltage command value are subtracted each other; One voltage regulator is in order to regulate the output valve of this subtracter; One first summer in order to output valve and this input offset value addition with this voltage regulator, and then deducts this d axle the 4th feedback signal; One current regulator is in order to regulate the output valve of this first summer; One multiplier is in order to this q axle the 4th feedback signal that doubles according to a particular power; And one second summer, in order to through with the output valve of the output valve of this current regulator and this multiplier mutually adduction deduct this d axle the 5th feedback signal and produce this d axle control command.
Aforesaid power conversion circuit; Wherein said the 4th feedback signal with this stator coordinate representation comprises a q axle the 4th feedback signal and a d axle the 4th feedback signal; And this q axle control unit comprises: a subtracter, in order to a current command value and this q axle the 4th feedback signal are subtracted each other; One current regulator is in order to regulate the output valve of this subtracter; One multiplier is in order to this d axle the 4th feedback signal that doubles according to a particular power; And one the 3rd summer, in order to through the output valve of this current regulator, the output valve and the 5th feedback signal addition of this q axle of this multiplier are produced this q axle control command.
The present invention compared with prior art has tangible advantage and beneficial effect.Know by above,, the invention provides a kind of power conversion circuit, can the two-stage tandem pattern be applied to regeneration energy resource system for achieving the above object.
The present invention is a kind of power conversion circuit; Aspect DC-DC converter; Be to adopt the control of electric current loop circuit, feedback output voltage and the output current of renewable energy resources electric supply installation and the generated output number that direct current chain voltage is controlled DC-DC converter whereby.
The present invention is a kind of power conversion circuit, aspect the AC/DC converter, is to feedback direct current chain voltage whereby to carry out the stable control of direct current chain voltage; D-q axial coordinate (rotor coordinate) conversion reduces system's controlling Design problem whereby.
The present invention is a kind of power conversion circuit; Aspect the AC/DC converter, be that the power back-off of importing is whereby controlled to regulate direct current chain voltage, make it under load momentary variation situation; The direct current chain voltage of output does not have jumbo change, so as to improving its stability.
The present invention is a kind of power conversion circuit, aspect the AC/DC converter, is that line voltage angle position detecting can be synchronous with civil power with the output voltage of guaranteeing the AC/DC converter whereby.
For reaching above-mentioned effect, the present invention provides a kind of power conversion circuit, and it comprises: one first receiving terminal, in order to electrically connect a regeneration energy resource power supply; One second receiving terminal is in order to receive a civil power; One load end is in order to electrically connect a load; One DC-DC converter, the input of DC-DC converter is electrically connected to first receiving terminal, to transfer the output voltage of renewable energy resources electric supply installation to a stable direct current chain voltage corresponding to work period of one first modulating signal; One direct current/alternating-current converter, the input of AC/DC converter is electrically connected to the output of DC-DC converter, to receive direct current chain voltage and to become one to exchange chain voltage direct current chain voltage transitions with the work period corresponding to one second modulating signal; One output circuit is electrically connected to output, second receiving terminal and the load end of AC/DC converter, with by a supply load electric power that exchanges in chain voltage and the civil power; One feedback circuit; Electrically connect the output of first receiving terminal, DC-DC converter, the output and second receiving terminal of AC/DC converter, to feedback corresponding to one first feedback signal of the output voltage of renewable energy resources electric supply installation, corresponding to one second feedback signal of the output current of renewable energy resources electric supply installation, corresponding to one the 3rd feedback signal of the direct current chain voltage of DC-DC converter, corresponding to one the 4th feedback signal of the output current of AC/DC converter and one the 5th feedback signal corresponding to the output voltage of civil power; One circuit for detecting is electrically connected to feedback circuit, to receive the 5th feedback signal and to carry out computing to obtain one jiao of position of civil power based on the 5th feedback signal; One control module; Be electrically connected to feedback circuit and circuit for detecting; With according to the position, angle with the 4th feedback signal and the 5th feedback signal from converting into rotor coordinate representation with two stator coordinate representations, export one first control signal according to first feedback signal, second feedback signal and the 3rd feedback signal, and export one second control signal according to first feedback signal, second feedback signal, the 3rd feedback signal and with the 4th feedback signal and the 5th feedback signal of rotor coordinate representation; And a pulse wave regulating circuit, be electrically connected to control module, in order to exporting first modulating signal, and export second modulating signal according to second control signal according to first control signal.
By technique scheme, power conversion circuit of the present invention has advantage and beneficial effect at least:
1, Design of Digital Circuit can significantly be reduced in the volume on the hardware circuit whereby.
2, can feedback output voltage and the output current of renewable energy resources electric supply installation and the generated output number that direct current chain voltage is controlled DC-DC converter whereby.
3, can feedback the stable control that direct current chain voltage carries out direct current chain voltage whereby.
4, can adopt d-q axial coordinate conversion, will the time controlling elements that become change when non-variable factor into and control, the order of causes system is easier to follow, and then reduces the problem of system's controlling Design.
5, the power back-off that can import is whereby controlled and is regulated direct current chain voltage, and so as to improving its stability, and then it is instantaneous to improve system effectively.
6, can detect and calculate the position, angle of civil power more accurately, can be synchronous with the output voltage of guaranteeing the AC/DC converter with civil power.
In sum; The invention relates to a kind of power conversion circuit, it utilizes control module according to the direct current chain voltage control pulse wave regulating circuit of the output voltage of renewable energy resources electric supply installation and output current and the DC-DC converter responsibility cycle with the regulation and control DC-DC converter.And, utilize control module to control the responsibility cycle of pulse wave regulating circuit with regulation and control AC/DC converter according to output voltage and output current, the direct current chain voltage of DC-DC converter and the output voltage of mains power supply of renewable energy resources electric supply installation.The present invention has apparent progress technically, has tangible good effect, really is a novelty, progress, practical new design.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention; Understand technological means of the present invention in order can more to know; And can implement according to the content of specification, and for let above and other objects of the present invention, feature and advantage can be more obviously understandable, below special act preferred embodiment; And conjunction with figs., specify as follows.
Description of drawings
Fig. 1 is the summary structural representation of the parallel regeneration energy resource system of a kind of civil power of existing convention.
Fig. 2 is the summary structural representation of the power conversion circuit of power conversion circuit first embodiment of the present invention.
Fig. 3 is the summary structural representation of the circuit for detecting of an embodiment.
Fig. 4 is the summary structural representation of the control module of an embodiment.
Fig. 5 is the summary structural representation of first controller of an embodiment.
Fig. 6 is the summary structural representation of second controller of an embodiment.
Fig. 7 is the summary structural representation of the d axle control unit of an embodiment.
Fig. 8 is the summary structural representation of the q axle control unit of an embodiment.
10: renewable energy resources electric supply installation 20: power conversion circuit
24: controller 30: mains power supply
40: load 210: DC-DC converter
220: AC/DC converter 230: output circuit
240: feedback circuit 250: circuit for detecting
252: second order digital quadrature transducer 254: arctangent computation unit
260: control module 262: coordinate transformation unit
266: the second controllers of 264: the first controllers
2661: power compensating unit 2662:d axle control unit
2663:q axle control unit 2664: coordinate inverse transform unit
2665; Arithmetic element 270: pulse wave regulating circuit
IN1: the first receiving terminal IN2: second receiving terminal
OUT: load end FB1: first feedback signal
FB2: the second feedback signal FB3: the 3rd feedback signal
FB4: the 4th feedback signal FB5: the 5th feedback signal
θ
e: position, angle CS1: first control signal
CS2: second control signal
FB4 ': with the 4th feedback signal of rotor coordinate representation
FB5 ': with the 5th feedback signal of rotor coordinate representation
e
α, e
β: the string ripple synchronous with civil power
d
V1: the first modulating signal d
V2: second modulating signal
ST1: subtracter ST2: subtracter
ST3: subtracter IR1: current regulator
IR2: current regulator VR1: voltage regulator
SUM0: summer SUM1: first summer
SUM2: the second summer SUM3: the 3rd summer
INV: reciprocator MP1: multiplier
MP2: multiplier I1: current command value
I2: current command value V1: voltage command value
e
q: q axle the 5th feedback signal e
d: d axle the 5th feedback signal
CPS: input offset value μ
d: d axle control command
μ
q: q axle control command
ν
α β: with the control command of two stator coordinate representations
i
q: q axle the 4th feedback signal i
d: d axle the 4th feedback signal
WL * i
q: q axle the 4th feedback signal after the multiplication
WL * i
d: d axle the 4th feedback signal after the multiplication
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with accompanying drawing and preferred embodiment; To its embodiment of power conversion circuit, method, step, characteristic and the effect thereof that proposes according to the present invention, specify as after.
Fig. 2 is the summary structural representation of the power conversion circuit 20 of first embodiment of the invention.Fig. 3 is the summary structural representation of the circuit for detecting 250 of an embodiment.Fig. 4 is the summary structural representation of the control module 260 of an embodiment.
See also Fig. 2; Power conversion circuit 20 comprises the first receiving terminal IN1, the second receiving terminal IN-2, load end OUT, DC-DC converter 210, AC/DC converter 220, output circuit 230, feedback circuit 240, circuit for detecting 250, control module 260 and pulse wave regulating circuit 270.
The first receiving terminal IN1 can be electrically connected to renewable energy resources electric supply installation 10, to receive the renewable energy resources that renewable energy resources electric supply installation 10 is produced.This renewable energy resources electric supply installation 10 can be fuel cell, so this non-restriction of the present invention.
The second receiving terminal IN-2 can be electrically connected to the feed end of mains power supply 30, to receive the civil power that feed end was provided of mains power supply 30.
Load end OUT can be electrically connected to load 40, to provide electric power to load 40.
The input of DC-DC converter 210 is electrically connected to the first receiving terminal IN1, and the output of DC-DC converter 210 is electrically connected to the input of AC/DC converter 220.The output of AC/DC converter 220 then is electrically connected to output circuit 230.In addition, output circuit 230 also is electrically connected to the second receiving terminal IN-2 and load end OUT.
DC-DC converter 210 boosts to stable and fixing direct current power with the received renewable energy resources of the first receiving terminal IN1, and exports to AC/DC converter 220.At this, DC-DC converter 210 can will transfer stable direct current chain voltage via the output voltage of the received renewable energy resources electric supply installation 10 of the first receiving terminal IN1 to corresponding to the work period of first modulating signal.
AC/DC converter 220 receives the direct current chain voltage that DC-DC converter 210 is produced, and with the work period corresponding to second modulating signal direct current chain voltage transitions that receives is become to exchange chain voltage again.
Under normal condition, output circuit 230 can electrically conduct AC/DC converter 220 with load end OUT, so that the interchange chain voltage that AC/DC converter 220 produced is supplied to load 40 via load end OUT.In other words, when the interchange chain voltage of being exported when AC/DC converter 220 was enough to be supplied to load 40, output circuit 230 can break off the electrically connect between the second receiving terminal IN2 and the load end OUT.And the interchange chain undertension of being exported when AC/DC converter 220 to be when being supplied to load 40, and the electrically connect between 230 conductings of output circuit, second receiving terminal IN2 and the load end OUT is to offer civil power load 40.
Wherein, civil power can only be supplied the portion of energy that interchange chain voltage that AC/DC converter 220 exported does not satisfy load 40 demands.In other words, the interchange chain undertension of being exported when AC/DC converter 220 when being supplied to load 40, the interchange chain voltage that can be exported by AC/DC converter 220 and the power demand of the common share load 40 of civil power.Yet; This non-restriction of the present invention; The interchange chain undertension that also can be exported at AC/DC converter 220 is when being supplied to load 40; Electrically connect between conducting second receiving terminal IN2 and the load end OUT and break off AC/DC converter 220 and load end OUT between electrically connect, to satisfy fully the electricity needs of load 40 by civil power.Wherein, output circuit 230 can comprise a relay.
At this; The input of the feedback circuit 240 fechtables first receiving terminal IN1, the output of DC-DC converter 210, the output of AC/DC converter 220 and the input of the second receiving terminal IN2; And will be corresponding to the first feedback signal FB1 of the output voltage of renewable energy resources electric supply installation 10, corresponding to the second feedback signal FB2 of the output current of renewable energy resources electric supply installation 10, corresponding to the 3rd feedback signal FB3 of the direct current chain voltage of DC-DC converter 210, feedback to control module 260 corresponding to the 4th feedback signal FB4 of the output current of AC/DC converter 220 with corresponding to the 5th feedback signal FB5 of the output voltage of the civil power of mains power supply 30, and will feedback to circuit for detecting 250 corresponding to the 5th feedback signal FB5 of the output voltage of the civil power of mains power supply 30.
Fig. 3 is the summary structural representation of the circuit for detecting 250 of an embodiment.Please merge and consult Fig. 3, circuit for detecting 250 carries out computing based on the 5th feedback signal FB5, to obtain position, the angle θ of civil power
eCircuit for detecting 250 can comprise: second order digital quadrature transducer 252 and arctangent computation unit 254.
Second order digital quadrature transducer 252 is electrically connected between feedback circuit 240 and the arctangent computation unit 254, and arctangent computation unit 254 then is electrically connected between second order digital quadrature transducer 252 and the control module 260.
At this, second order digital quadrature transducer 252 receives feedback circuits 240 and feedbacks the 5th feedback signal FB5 corresponding to the output voltage of the civil power of mains power supply 30 that comes, and produces and the synchronous string ripple e of civil power according to the 5th feedback signal FB5
α, e
βThen, synchronous with the civil power whereby again string ripple e in arctangent computation unit 254
α, e
βCalculate position, the angle θ of civil power
e, and export to control module 260.At this, arctangent computation unit 254 can be through calculating and the synchronous string ripple e of civil power
α, e
βPositive traditional method of indicating the pronunciation of a Chinese character function to calculate position, the angle θ of civil power
eWherein, string ripple e
α, e
βBoth are quadrature, promptly differ 90 degree.
Please merge and consult Fig. 4, control module 260 can be exported the first control signal CS1 according to the first feedback signal FB1, the second feedback signal FB2 and the 3rd feedback signal FB3.Control module 260 also can be according to according to position, angle θ
eWith the 4th feedback signal FB4 and the 5th feedback signal FB5 from converting into rotor coordinate representation, and according to the first feedback signal FB1, the second feedback signal FB2, the 3rd feedback signal FB3, with the 4th feedback signal FB4 ' of rotor coordinate representation and the 5th feedback signal FB5 ' the output second control signal CS2 with rotor coordinate representation with two stator coordinate representations.
The input of coordinate transformation unit 262 is electrically connected to the arctangent computation unit 254 of feedback circuit 240 and circuit for detecting 250.The input of first controller 264 is electrically connected to feedback circuit 240, and the output of first controller 264 is electrically connected to pulse wave regulating circuit 270.In other words, first controller 264 is to be electrically connected between feedback circuit 240 and the pulse wave regulating circuit 270.The input of second controller 266 is electrically connected to the arctangent computation unit 254 and coordinate transformation unit 262 of feedback circuit 240, circuit for detecting 250, and the output of second controller 266 is electrically connected to pulse wave regulating circuit 270.
Position, the angle θ of the civil power that coordinate transformation unit 262 reception arctangent computation unit 254 calculate
e, and according to position, the angle θ that receives
eThe 4th feedback signal FB4 and the 5th feedback signal FB5 are represented from converting into stator coordinate (d-q axial coordinate) with two rotor coordinates (alpha-beta axial coordinate) expression.
In addition, control module 260 also can more comprise a controller, to come the change action of controlling output circuit 230 according to the electricity needs of load 40.Moreover control module 260 also can be according to the change action of the electricity needs controlling output circuit 230 of load 40.Because the switching controls of 260 pairs of output circuits 230 of control module is known by those skilled in the art, so repeat no more at this.
As shown in Figure 2, pulse wave regulating circuit 270 can be exported the first modulating signal d according to the first control signal CS1
V1, to regulate the responsibility cycle of DC-DC converter 210.And pulse wave regulating circuit 270 also can be exported the second modulating signal d according to the second control signal CS2
V2, to regulate the responsibility cycle of AC/DC converter 220.
Fig. 5 is the summary structural representation of first controller 264 of an embodiment.
See also Fig. 5, first controller 264 can comprise subtracter ST1, current regulator IR1, summer SUM0 and reciprocator INV.
The positive input terminal of subtracter ST1 is electrically connected to the first feeding unit (not shown), and the negative input end of subtracter ST1 then electrically is connected to feedback circuit 240.Current regulator IR1 is electrically connected at the output of subtracter ST1 and first positive input terminal of summer SUM0.Second positive input terminal and the negative input end of summer SUM0 are electrically connected to feedback circuit 240, and the output of summer SUM0 is electrically connected to the input of reciprocator INV.And the output of reciprocator INV is electrically connected to pulse wave regulating circuit 270.
First feeding unit can provide preset current command value I1 to subtracter ST1.Subtracter ST1 subtracts each other the current command value I1 that receives and the second feedback signal FB2 again, and the result after will subtracting each other exports to current regulator IR1.Then, current regulator IR1 regulates the output valve (that is, the current command value I1 and the second feedback signal FB2 subtract each other the result) of subtracter ST1, and the value after will regulating is exported to summer SUM0.At this, the error of the scalable input current of current regulator IR1 (that is the output current of renewable energy resources electric supply installation).Summer SUM0 with the output valve of current regulator IR1 and the 3rd feedback signal FB3 mutually adduction deduct the first feedback signal FB1, and result of calculation is exported to reciprocator INV.Then, reciprocator INV can convert the 3rd feedback signal FB3 into inverse according to the output valve of summer SUM0, produces the first control signal CS1 according to this and gives pulse wave regulating circuit 270.At this, reciprocator INV can do the multiplying power reduction to the direct current chain voltage of DC-DC converter 210 through carrying out computing reciprocal, so as to the direct current chain voltage of unit DC-DC converter 210.
Fig. 6 is the summary structural representation of second controller 266 of an embodiment.
See also Fig. 6, second controller 266 can comprise power compensating unit 2661, d axle control unit 2662, q axle control unit 2663, coordinate inverse transform unit 2664 and arithmetic element 2665.
At this, comprise q axle the 5th feedback signal e with the 5th feedback signal FB ' of stator coordinate representation
qThe quadrature axis component of the 5th feedback signal of stator coordinate representation (that is, with) and d axle the 5th feedback signal e
dThe direct axis component of the 5th feedback signal of stator coordinate representation (that is, with).
Wherein, power compensating unit 2661 can be carried out following operational formula: 2 * FB1 * FB2 ÷ e
d(formula 1), and the operation result of formula 1 is corresponding to input offset value CPS.
In addition, with the control command ν of two rotor coordinate representations
α βCan comprise α axle control command ν
αAnd β axle control command ν β.And arithmetic element 2665 can be according to α axle control command ν
αAnd β axle control command ν
βCarry out following operational formula:
(formula 2), and the operation result of formula 2 is corresponding to the second control signal CS2.
At this, also comprise q axle the 4th feedback signal i with the 4th feedback signal FB4 ' of stator coordinate representation
qThe quadrature axis component of the 4th feedback signal of stator coordinate representation (that is, with) and d axle the 4th feedback signal i
dThe direct axis component of the 4th feedback signal of stator coordinate representation (that is, with).
Fig. 7 is the summary structural representation of the d axle control unit 2662 of an embodiment.
See also figure, d axle control unit 2662 can comprise subtracter ST2, voltage regulator VR1, the first summer SUM1, current regulator IR2, multiplier MP1 and the second summer SUM2.
The positive input terminal of subtracter ST2 is electrically connected to feedback circuit 240, and the negative input end of subtracter ST2 is electrically connected to the second feeding unit (not shown).Voltage regulator VR1 then is electrically connected between first positive input terminal of output and the first summer SUM1 of subtracter ST2.The second positive input terminal power compensating unit 2661 of the first summer SUM1, and the negative input end of the first summer SUM1 is electrically connected to coordinate transformation unit 262.Current regulator IR2 then is electrically connected between first positive input terminal of output and the second summer SUM2 of the first summer SUM1.And multiplier MP1 is electrically connected between second positive input terminal of the coordinate transformation unit 262 and the second summer SUM2.The negative input end of the second summer SUM2 is electrically connected to coordinate transformation unit 262, and the output of the second summer SUM2 then is electrically connected to coordinate inverse transform unit 2664.
Second feeding unit provides preset voltage command value V1 to subtracter ST2.The 3rd feedback signal FB3 and the voltage command value V1 of subtracter ST2 self-feedback in the future circuit 240 subtract each other, and the result of additive operation is exported to voltage regulator VR1.Then, voltage regulator VR1 regulates the output valve (that is, the 3rd feedback signal FB3 and voltage command value V1 subtract each other the result) of subtracter ST2, and the value after will regulating is exported to the first summer SUM1.At this, the error of the scalable direct current chain of voltage regulator VR1 voltage (that is the output voltage of DC-DC converter 210).The first summer SUM1 is output valve and the input offset value CPS addition of voltage regulator VR1, and then deducts d axle the 4th feedback signal i
d, and last result of calculation exported to current regulator IR2.Then, current regulator IR2 regulates the output valve of the first summer SUM1 (that is, the output valve of voltage regulator VR1 adds input offset value CPS, and then deducts d axle the 4th feedback signal i
dAdd overall result), and the value after will regulating is exported to the second summer SUM2.At this, the error of scalable d axle the 4th feedback signal of current regulator IR2.Moreover multiplier MP1 is according to a particular power (WL) multiplication q axle the 4th feedback signal i
q, with q axle the 4th feedback signal WL * i after the output multiplication
qGive the second summer SUM2.Then, the second summer SUM2 passes through the output valve of current regulator IR2 and output valve (WL * i of multiplier MP1
q) addition and deduct d axle the 5th feedback signal e
dAnd generation d axle control command μ
dGive coordinate inverse transform unit 2664.
Fig. 8 is the summary structural representation of the q axle control unit 2663 of an embodiment.
See also Fig. 8, q axle control unit 2663 can comprise subtracter ST3, current regulator IR3, multiplier MP2 and the 3rd summer SUM3.
The positive input terminal of subtracter ST3 is electrically connected to the 3rd feeding unit (not shown), and the negative input end of subtracter ST3 is electrically connected to coordinate transformation unit 262.Current regulator IR3 then is electrically connected between first positive input terminal of output and the 3rd summer SUM3 of subtracter ST3.Multiplier MP1 is electrically connected between second positive input terminal of coordinate transformation unit 262 and the 3rd summer SUM3.Moreover the 3rd positive input terminal of the 3rd summer SUM3 is electrically connected to coordinate transformation unit 262, and the output of the 3rd summer SUM3 then is electrically connected to coordinate inverse transform unit 2664.
The 3rd feeding unit provides preset current command value I2 to subtracter ST3.Subtracter ST3 is with current command value I2 that receives and q axle the 4th feedback signal i from coordinate transformation unit 262
qSubtract each other, and the result of additive operation is exported to current regulator IR3.Then, current regulator IR3 regulates output valve (that is, current command value I2 and q axle the 4th feedback signal i of subtracter ST3
qSubtract each other the result), and the value after will regulating is exported to the 3rd summer SUM3.At this, the error of scalable q axle the 4th feedback signal of current regulator IR3.Moreover multiplier MP2 is according to a particular power (WL) multiplication d axle the 4th feedback signal i
d, with d axle the 4th feedback signal WL * i after the output multiplication
dGive the 3rd summer SUM3.Then, the 3rd summer SUM3 passes through the output valve of current regulator IR3, output valve (WL * i of multiplier MP2
d) and q axle the 5th feedback signal e
qAddition and produce q axle control command μ
qGive coordinate inverse transform unit 2664.
Wherein, current command value I2 generally can be set at 0.Moreover paired multiplier MP1 and MP2 can adopt identical particular power, and this particular power (WL) can be the angular frequency (ω of civil power
e) be multiplied by filter inductance value (L
f).
Moreover, each assembly of control module 260 all whereby software program design realize the running of above-mentioned correspondence, significantly to be reduced in the volume on the hardware circuit.
Can use the parallel regeneration energy resource system of civil power according to the power conversion circuit of the embodiment of the invention.On aspect the control, the parallel regeneration energy resource system of civil power is to adopt two-stage tandem pattern (after meaning the DC-DC converter 210 of the renewable energy resources process that renewable energy resources electric supply installation 10 produced, being connected in series the AC/DC converter 220 of one-level again).And; In total system control; According to the power conversion circuit of the embodiment of the invention aspect the DC-DC converter 210; Be to adopt the control of electric current loop circuit, feedback output voltage and the output current of renewable energy resources electric supply installation 10 and the generated output number that direct current chain voltage is controlled DC-DC converter 210 whereby.And, aspect the AC/DC converter 220, be to feedback direct current chain voltage whereby to carry out the stable control of direct current chain voltage according to the power conversion circuit of the embodiment of the invention; The d-q axial coordinate is changed and is reduced system's controlling Design problem whereby; The control of the power back-off of input makes them under load 40 momentary variation situations to regulate direct current chain voltage whereby, and the direct current chain voltage of output does not have jumbo change, so as to improving its stability; And position, line voltage angle θ whereby
eDetecting can be synchronous with civil power with the output voltage of guaranteeing AC/DC converter 220.
Above-mentioned each embodiment is in order to characteristics of the present invention to be described; Its purpose is had the knack of this operator and can be understood content of the present invention and implement according to this making; And non-limiting claim of the present invention; The equivalence accomplished is modified so all other do not break away from disclosed spirit or revise, and must be included in the claim of the following stated.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (7)
1. power conversion circuit is characterized in that it comprises:
One first receiving terminal is in order to electrically connect a regeneration energy resource power supply;
One second receiving terminal is in order to receive a civil power;
One load end is in order to electrically connect a load;
One DC-DC converter, the input of this DC-DC converter are electrically connected to this first receiving terminal, to transfer the output voltage of this renewable energy resources electric supply installation to a stable direct current chain voltage corresponding to work period of one first modulating signal;
One direct current/alternating-current converter; The input of this AC/DC converter is electrically connected to the output of this DC-DC converter, to receive this direct current chain voltage and to become one to exchange chain voltage this direct current chain voltage transitions corresponding to work period of one second modulating signal;
One output circuit is electrically connected to output, this second receiving terminal and this load end of this AC/DC converter, supplies with this load electric to be exchanged one in chain voltage and this civil power by this;
One feedback circuit; Electrically connect this output of this first receiving terminal, this DC-DC converter, this output and this second receiving terminal of this AC/DC converter, to feedback corresponding to one first feedback signal of this output voltage of this renewable energy resources electric supply installation, corresponding to one second feedback signal of the output current of this renewable energy resources electric supply installation, corresponding to one the 3rd feedback signal of this direct current chain voltage of this DC-DC converter, corresponding to one the 4th feedback signal of the output current of this AC/DC converter and one the 5th feedback signal corresponding to the output voltage of this civil power;
One circuit for detecting is electrically connected to this feedback circuit, to receive the 5th feedback signal and to carry out computing to obtain one jiao of position of this civil power based on the 5th feedback signal;
One control module; Be electrically connected to this feedback circuit and this circuit for detecting; With according to this position, angle with the 4th feedback signal and the 5th feedback signal from converting into rotor coordinate representation with two stator coordinate representations, export one first control signal according to this first feedback signal, this second feedback signal and the 3rd feedback signal, and export one second control signal according to this first feedback signal, this second feedback signal, the 3rd feedback signal and with the 4th feedback signal and the 5th feedback signal of this rotor coordinate representation; And
One pulse wave regulating circuit is electrically connected to this control module, in order to according to this first modulating signal of this first control signal output, and according to this this second modulating signal of second control signal output.
2. power conversion circuit according to claim 1 is characterized in that this circuit for detecting comprises:
One second order digital quadrature transducer is electrically connected to this feedback circuit, to receive the 5th feedback signal and to produce and the synchronous string ripple of this civil power according to this; And
One arctangent computation unit is electrically connected between this second order digital quadrature transducer and this control module, to calculate this position, angle of this civil power whereby with this synchronous string ripple of this civil power.
3. power conversion circuit according to claim 1 is characterized in that this control module comprises:
One coordinate transformation unit, in order to according to this position, angle with the 4th feedback signal and the 5th feedback signal from converting into stator coordinate representation with two rotor coordinate representations;
One first controller is in order to export this first control signal according to this first feedback signal, this second feedback signal and the 3rd feedback signal; And
One second controller is in order to according to this first feedback signal, this second feedback signal, the 3rd feedback signal, with the 4th feedback signal and the 5th feedback signal and this second control signal of this position, angle output of this stator coordinate representation.
4. power conversion circuit according to claim 3 is characterized in that this first controller comprises:
One subtracter is in order to subtract each other a current command value and this second feedback signal;
One current regulator is in order to regulate the output valve of this subtracter;
One summer, in order to the output valve of this current regulator and the 3rd feedback signal mutually adduction deduct this first feedback signal; And
One reciprocator is in order to convert the 3rd feedback signal into reciprocal to produce this first control signal through the output valve according to this summer.
5. power conversion circuit according to claim 3 it is characterized in that comprising a q axle the 5th feedback signal and a d axle the 5th feedback signal with the 5th feedback signal of this stator coordinate representation, and this second controller comprises:
One power compensating unit is in order to produce an input offset value according to this first feedback signal, this second feedback signal and this d axle the 5th feedback signal;
One d axle control unit is in order to according to the 3rd feedback signal, this input offset value, produce a d axle control command with the 4th feedback signal and this d axle the 5th feedback signal of this stator coordinate representation;
One q axle control unit is in order to produce a q axle control command according to the 4th feedback signal with this stator coordinate representation with this q axle the 5th feedback signal;
One coordinate inverse transform unit is in order to produce a control command with this two spool rotor coordinate representations with this d axle control command and this q axle control command from converting into these two rotor coordinate representations with this stator coordinate representation according to this position, angle; And
One arithmetic element is in order to receive with this control command of these two rotor coordinate representations and according to carrying out computing to produce this second control signal with this control command of these two rotor coordinate representations.
6. power conversion circuit according to claim 5 it is characterized in that comprising a q axle the 4th feedback signal and a d axle the 4th feedback signal with the 4th feedback signal of this stator coordinate representation, and this d axle control unit comprises:
One subtracter is in order to subtract each other the 3rd feedback signal and a voltage command value;
One voltage regulator is in order to regulate the output valve of this subtracter;
One first summer in order to output valve and this input offset value addition with this voltage regulator, and then deducts this d axle the 4th feedback signal;
One current regulator is in order to regulate the output valve of this first summer;
One multiplier is in order to this q axle the 4th feedback signal that doubles according to a particular power; And
One second summer, in order to through with the output valve of the output valve of this current regulator and this multiplier mutually adduction deduct this d axle the 5th feedback signal and produce this d axle control command.
7. power conversion circuit according to claim 5 it is characterized in that comprising a q axle the 4th feedback signal and a d axle the 4th feedback signal with the 4th feedback signal of this stator coordinate representation, and this q axle control unit comprises:
One subtracter is in order to subtract each other a current command value and this q axle the 4th feedback signal;
One current regulator is in order to regulate the output valve of this subtracter;
One multiplier is in order to this d axle the 4th feedback signal that doubles according to a particular power; And
One the 3rd summer is in order to through producing this q axle control command with the output valve of this current regulator, the output valve and the 5th feedback signal addition of this q axle of this multiplier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100068871A CN102593937A (en) | 2011-01-10 | 2011-01-10 | Power conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100068871A CN102593937A (en) | 2011-01-10 | 2011-01-10 | Power conversion circuit |
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| Publication Number | Publication Date |
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| CN102593937A true CN102593937A (en) | 2012-07-18 |
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ID=46482259
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6058035A (en) * | 1998-03-30 | 2000-05-02 | Sanyo Electric Co., Ltd. | Method and apparatus for supplying AC power to commercial power line by using sunlight |
| CN2888741Y (en) * | 2005-09-19 | 2007-04-11 | 珠海泰坦科技股份有限公司 | Power supply control system for non-master parallel operation of inverter |
| CN101119031A (en) * | 2007-06-08 | 2008-02-06 | 清华大学 | Photovoltaic three-phase grid control method for fast and steadily implementing maximal power tracing |
| US20100133904A1 (en) * | 2009-10-26 | 2010-06-03 | General Electric Company | Dc bus voltage control for two stage solar converter |
-
2011
- 2011-01-10 CN CN2011100068871A patent/CN102593937A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6058035A (en) * | 1998-03-30 | 2000-05-02 | Sanyo Electric Co., Ltd. | Method and apparatus for supplying AC power to commercial power line by using sunlight |
| CN2888741Y (en) * | 2005-09-19 | 2007-04-11 | 珠海泰坦科技股份有限公司 | Power supply control system for non-master parallel operation of inverter |
| CN101119031A (en) * | 2007-06-08 | 2008-02-06 | 清华大学 | Photovoltaic three-phase grid control method for fast and steadily implementing maximal power tracing |
| US20100133904A1 (en) * | 2009-10-26 | 2010-06-03 | General Electric Company | Dc bus voltage control for two stage solar converter |
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Application publication date: 20120718 |