CN100399666C - Three-phase three-wire type active electric filter - Google Patents
Three-phase three-wire type active electric filter Download PDFInfo
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- CN100399666C CN100399666C CNB2004100573480A CN200410057348A CN100399666C CN 100399666 C CN100399666 C CN 100399666C CN B2004100573480 A CNB2004100573480 A CN B2004100573480A CN 200410057348 A CN200410057348 A CN 200410057348A CN 100399666 C CN100399666 C CN 100399666C
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/20—Active power filtering [APF]
Abstract
The present invention relates to a three-phase three-wire active electric filter. The active electric filter comprises a DC energy storage capacitor, an electric energy converter, a filtering inductor group, a virtual work compensation capacitor group and a filtering capacitor and resistor group, wherein the DC energy storage capacitor provides stable DC voltage; the electric energy converter comprises a double-arm bridge type electric and electronic switch element group, two AC ends and two DC ends. One phase of the three-phase three-wire active electric filter can be directly connected to any DC end of the electric energy converter without the control of the double-arm bridge electric and electronic switch element group; therefore, the usage number of electric and electronic switch elements can be reduced, and the manufacturing cost is reduced.
Description
Technical field
The present invention is about a kind of phase three-wire three formula active electric power filter, and it is especially about being applied to active electric power filter of filtering phase three-wire three formula power-supply system harmonic current.
Background technology
Because semiconductor technology is advanced by leaps and bounds, thereby develop and many electronic power switch elements in recent years, these electronic power switch elements have the characteristic of good controllability, high pressure resistant and anti-big electric current.These elements are applied in the power equipment widely at present, as motor driver, arc furnace, electric car, charger and ligthing paraphernalia etc.Because therefore the non-linear input characteristics of these power electronic equipments produces a large amount of harmonic currents, this harmonic current causes some serious power system problems, as disturbance, voltage distortion, destruction force device and the mechanical disorder etc. of transformer superheating phenomenon, electric rotating machine.
For effective restriction harmonic pollution problem, many international research mechanism specifies the harmonic wave control test, as IEEE 519-1992, IEC 1000-3-5 and IEC 1000-3-4 etc.Platform electricity company as for Taiwan also formulates " Harmonious Waves in Power Systems control tentative standard ", so solve the important topic that harmonic problem has become present power-supply system.
The method that solves harmonic problem traditionally adopts the passive type electric-power filter, this passive type electric-power filter is made up of inductor and AC capacitor, yet the passive type electric-power filter can cause resonance problems, and can cause that contiguous harmonic current injects problem, and the destruction of causing the passive type electric-power filter.In addition, its filtering characteristic is subject to the system reactance influence, and is difficult to obtain good filtering effect.In recent years because the development of power electronic technology still has the method that adopts the active electric power filter to solve harmonic problem, as U.S. Pat 6,472,775, US 5,977,660 and US 5,321,598 etc.
Please refer to shown in Figure 1ly, the circuit diagram of active electric power filter is commonly used in its announcement.This power supply 1 supply three-phase power is to load 3, and this active electric power filter 4 is in parallel with this load 3.This active electric power filter 4 comprises a direct current energy storage capacitor 40, an electric energy transducer 41 and a filter element 42.Utilize the voltage that this electric energy transducer 41 switches on the dc energy storage capacitor 40 to produce offset current injection power feeder through filter element, electric energy transducer 41 is the electronic power switch element group of a three arm type bridge-type framework, and filter element can be the high frequency ripple electric current that an inductor or an inductor and capacitor group are caused in order to this electrical power switching element switching of filtering.Though this active electric power filter has good filtering characteristic, but electric energy transducer 41 capacity of this active electric power filter 4 must be not less than the product of load harmonic current and supply voltage, therefore the capacity of the electric energy transducer 41 of this active electric power filter 4 is very big, causes it to cost an arm and a leg and limits its practicality.
The problem that costs an arm and a leg that is caused for the bigger electric energy transducer capacity of need that solves the active electric power filter, therefore development is in conjunction with the combined power filter framework of passive component and electric energy transducer, this passive component is in order to reduce the capacity of this electric energy transducer, as U.S. Pat 5,567,994, US5,731,965 and US6,717,465 etc.Yet these patents are applied in the electronic power switch element group that its electric energy transducer framework that adopts of phase three-wire three formula is three arm type bridge-type frameworks, each arm contains two electronic power switch elements, use six electronic power switch elements altogether, if the use that can reduce the electronic power switch element then can reduce the cost of filter, to increase its competitiveness.
Summary of the invention
Defective in view of prior art, the present invention proposes a kind of phase three-wire three formula active electric power filter, this active electric power filter is in conjunction with a reactive-load compensation capacitor and an electric energy transducer, this electric energy transducer only comprises a both arms type bridge type power electronic switching element group, one of this phase three-wire three formula Active Power Filter-APF is directly connected to arbitrary dc terminal of this electric energy transducer without the control of electronic power switch element group, so the present invention can reduce the usage quantity of electronic power switch element and reduce its manufacturing cost.
Main purpose of the present invention provides a kind of phase three-wire three formula active electric power filter, and this device comprises a direct current energy storage capacitor, an electric energy transducer, a filter inductor group, a compensation capacitors, a filtering capacitor resistor group.This dc energy storage capacitor provides a stable DC voltage.This electric energy transducer comprises a both arms bridge type power electronic switching element group, and this electric energy transducer comprises two and exchanges end and two dc terminal, and the dc terminal of this electric energy transducer is connected to this dc energy storage capacitor.This filter inductor group and compensation capacitors have three inductors and three corresponding mutually series connection in order to filtering switching ripple and as reactive power compensation of AC capacitor respectively, what wherein the tandem compound of two inductors and AC capacitor was connected in phase three-wire three formula power supply appoints two of two-phase power feeder and this electric energy transducer to exchange between the end, and the tandem compound of another inductor and AC capacitor then is connected between arbitrary dc terminal of another phase power feeder of phase three-wire three formula power supply and this electric energy transducer.Therefore the present invention can reach the purpose of the usage quantity that reduces the electronic power switch element, and reduces its manufacturing cost.
In order to achieve the above object, technical scheme provided by the invention is:
A kind of phase three-wire three formula active electric power filter comprises:
A dc energy storage capacitor, it is in order to provide a stable DC voltage;
An electric energy transducer, it is made up of a both arms bridge type power electronic switching element group, and this electric energy transducer comprises two and exchanges end and two dc terminal, and two dc terminal of this electric energy transducer are connected to this dc energy storage capacitor;
A filter inductor group is connected to this electric energy transducer, and this filter inductor group is in order to the switching ripple current of this electric energy transducer of filtering;
A compensation capacitors, this compensation capacitors and this filter inductor group tandem compound, this compensation capacitors is as the idle producing component of this electric-power filter;
A filtering capacitor resistor group, the tandem compound of itself and this filter inductor group and compensation capacitors all links with the AC power feeder line; This filtering capacitor resistor assembly is should the filter inductor group, the harmonic wave that this electric energy transducer of filtering produces; And
A control circuit, it is in order to the switching signal of the electronic power switch element group that produces this electric energy transducer, so that this electric energy transducer produces an offset current and is injected into this AC power feeder line, so that the harmonic current that the filtering load produces, make the electric current of power supply level off to sine wave.
Description of drawings
Fig. 1 is the circuit diagram of existing active electric power filter.
Fig. 2 is the circuit diagram of the present invention's first preferred embodiment phase three-wire three formula active electric power filter.
Fig. 3 is the circuit diagram of the present invention's second preferred embodiment phase three-wire three formula active electric power filter.
Fig. 4 is the calcspar of the control circuit of phase three-wire three formula active electric power filter of the present invention.
Symbol description
1 power supply, 2 active electric power filters
20 dc energy storage capacitors, 21 electric energy transducers
22 filter inductor groups, 23 compensation capacitors
24 filtering capacitor resistor groups, 200 first band stop filters
201 PID controllers, 202 second band stop filters
203 first band pass filters, 204 first amplifiers
205 second band pass filters, 206 subtracters
207 second amplifiers, 208 low pass filters
209 setting voltages, 210 subtracters
211 controllers, 212 multipliers
213 adders, 214 pulse width modulators
3 loads
Embodiment
Please refer to shown in Figure 2ly, it discloses the circuit diagram of the present invention's first preferred embodiment phase three-wire three formula active electric power filter 2.This phase three-wire three formula active electric power filter 2 comprises a direct current energy storage capacitor 20, electric energy transducer 21, one filter inductor groups, 22, one compensation capacitors 23 and a filtering capacitor resistor group 24.Power supply 1 is supplied with phase three-wire three formula electric power to load 3 via three power feeders.
This power supply 1 provides a phase three-wire three electric power to use to load 3, and this phase three-wire three formula active electric power filter 2 is parallel to this load 3, so that the harmonic current that this load 3 of filtering is produced, and a reactive current is provided.This dc energy storage capacitor 20 provides a stable DC voltage.This electric energy transducer 21 comprises a both arms bridge type power electronic switching element group, and each arm of this both arms bridge type power electronic switching element group comprises two electronic power switch elements, and each electronic power switch element is made up of a power crystal and a diode.In addition, this both arms bridge type power electronic switching element group comprises two dc terminal and two interchange ends.Form the interchange end in two electronic power switch element junctions in each arm bridge-type framework, these other two ends of bridge-type framework are dc terminal.The dc terminal of this electric energy transducer 21 is connected to this dc energy storage capacitor 20.This filter inductor group 22 and compensation capacitors 23 have three inductors respectively and the corresponding mutually series connection of three AC capacitor is switched ripple in order to filtering and as reactive power compensation, and wherein the tandem compound of two inductors and AC capacitor two-phase power feeder and this electric energy transducer 21 two of appointing that are connected in phase three-wire three formula power supply 1 exchange between the negative terminal of dc terminal that the tandem compound of another inductor and AC capacitor between the end then is connected in another phase power feeder of phase three-wire three formula power supply 1 and this electric energy transducer 21.The three-phase power feeder line that this 24 of filtering capacitor resistor group is connected in parallel in phase three-wire three formula power supply 1 switches ripple in order to further filtering.
Referring again to shown in Figure 2, because each of this phase three-wire three formula active electric power filter 2 all comprises an AC capacitor of this compensation capacitors 23 mutually, and this AC capacitor can effectively intercept direct voltage.Therefore, when this electric energy transducer 21 is applied to phase three-wire three formula power supply 1, two arm bridge type power electronic switching element groups only need be set, by the offset current of this two-phase of switching may command of two arm bridge type power electronic switching element groups of this electric energy transducer 21.Because the three-phase current of three-phase three wire system and be zero, therefore if the biphase current that control connection is held to two interchanges of two arm bridge type power electronic switching element groups of this electric energy transducer 21, and when obtaining correct offset current, then the third phase of this phase three-wire three formula active electric power filter 2 also can obtain correct offset current.After this three-phase offset current injected the three-phase power feeder line, it is sinusoidal wave that the three-phase current that makes this power supply 1 be provided all is tending towards.
Please refer to shown in Figure 3ly, it discloses the circuit diagram of the present invention's second preferred embodiment phase three-wire three formula active electric power filter 2.Compared to the first preferred embodiment phase three-wire three formula active electric power filter 2 shown in Figure 2, the second preferred embodiment phase three-wire three formula active electric power filter 2 only has the connected mode difference of this filter inductor group 22 and compensation capacitors 23, because being series at this compensation capacitors 23 of this electric energy transducer 21 can intercept on the occasion of the direct voltage that reaches negative value, therefore what the tandem compound of two inductors and AC capacitor was connected in phase three-wire three formula power supply 1 in this filter inductor group 22 and the compensation capacitors 23 appoints two of two-phase power feeder and this electric energy transducer 21 to exchange between the end, and the tandem compound of another inductor and AC capacitor also can be connected between the dc terminal anode of another phase power feeder of phase three-wire three formula power supply 1 and this electric energy transducer 21.
To shown in Figure 3, the present invention first and two preferred embodiment phase three-wire three formula active electric power filters, 2 existing active electric power filters 4 have simple structure and reduce the effect of manufacturing cost referring again to Fig. 1.
Its controller can select for use the control method of existing voltage type and Current Control formula to reach the function of filtering phase three-wire three formula power-supply system harmonic current among first preferred embodiment of phase three-wire three formula active electric power filter 2 of the present invention and second embodiment, adopt the controller of voltage type to be illustrated especially exemplified by going out one among the present invention, yet the controller of the voltage type that the present invention lifted not is in order to limit the controller of phase three-wire three formula active electric power filter 2 of the present invention, please refer to shown in Figure 4ly, it discloses the control circuit calcspar of phase three-wire three formula active electric power filter 2 of the present invention.The control circuit of this active electric power filter 2 mainly comprises four loops, and it is that load harmonic compensation loop, supply harmonic suppress the loop, the electric energy transducer harmonic wave suppresses loop and dc energy storage capacitor loop of voltage regulation.
For the harmonic wave composition of output load current, the output bucking voltage that this electric energy transducer 21 produces must equal the product of the resultant impedance of the harmonic wave composition of load current and this filter inductor group 22 and compensation capacitors 23.Therefore first loop is about to load current and detects through one first band stop filter, 200 filtering first-harmonic compositions and take out this harmonic wave composition.Because inductor voltage can be tried to achieve by the differential of electric current, the voltage of capacitor can be tried to achieve by the integration of electric current, and can multiply by a ratio by electric current, the voltage of resistor tries to achieve, therefore take out the harmonic wave composition of this load current, behind a proportion integration differentiation (PID) controller 201, can try to achieve the voltage of harmonic wave composition on this filter inductor 22 and reactive-load compensation capacitor 23 resultant impedances of load current, it is as first loop output signal.In theory, if producing the voltage in this first loop, this electric energy transducer 21 then can convert the harmonic wave composition that offset current comes the filtering load current to through this filter inductor group 22 and compensation capacitors 23.But because first loop is to belong to out circuit controls, so if because the value of this filter inductor group 22 and compensation capacitors 23 etc. is offset its filter effect variation then to some extent.
Then, second loop is mainly in order to the error of the compensation result of revising first loop.The source current that this second loop will detect civil power is delivered to one second band stop filter, 202 filtering first-harmonics, takes out its characteristic frequency composition through one first band pass filter 203 again.If source current still has harmonic wave behind first loop compensation, then can detect this harmonic wave via this second loop, amplify as second loop output signal through first amplifier 204 again.
Then, tertiary circuit is mainly in order to produce the virtual humorous wave damping in this filter inductor group 22 and compensation capacitors 23 loops.Tertiary circuit can prevent that this filter inductor group 22 and reactive-load compensation capacitor 23 loops from producing high frequency oscillation.The output current that tertiary circuit will detect this electric energy transducer 21 takes out its first-harmonic through one second band pass filter 205, take out the harmonic wave composition of electric energy transducer output current again through a subtracter 206, amplify as the tertiary circuit output signal through one second amplifier 207 again.This electric energy transducer 21 can utilize this tertiary circuit to finish virtual harmonic wave resistor and connect with filter inductor group 22 and compensation capacitors 23, prevents concussion so that damping to be provided.
In order to keep the direct voltage that this dc energy storage capacitor 20 is provided, this electric energy transducer 21 can be run well, this active electric power filter 2 has the 4th loop.The 4th loop utilizes a low pass filter 208 to detect the direct voltage of this dc energy storage capacitor 20, deliver to a subtracter 210 again, after this subtracter 210 itself and a setting voltage 209 subtract each other, to subtract each other the result and deliver to a controller 211, the output of the output of this controller 211 and second band pass filter 205 after a multiplier 212 multiplies each other as the output signal in the 4th loop.Because this second band pass filter 205 is output as the fundamental component of these electric energy transducer 21 output currents, therefore the 4th loop can make this electric energy transducer 21 absorb meritorious or discharge meritorious, to keep the stable of direct voltage that this dc energy storage capacitor device 20 provided.
At last, with the output signal in first loop, second loop, tertiary circuit and the 4th loop after an adder 213 additions, promptly obtain the reference signal of this electric energy transducer 21, this reference signal is delivered to the switching signal that a pulse width modulator 214 can obtain the electronic power switch element group of this electric energy transducer 21.
Claims (10)
1. a phase three-wire three formula active electric power filter is characterized in that, comprises:
A dc energy storage capacitor, it is in order to provide a stable DC voltage;
An electric energy transducer, it is made up of a both arms bridge type power electronic switching element group, and this electric energy transducer comprises two and exchanges end and two dc terminal, and two dc terminal of this electric energy transducer are connected to this dc energy storage capacitor;
A filter inductor group is connected to this electric energy transducer, and this filter inductor group is in order to the switching ripple current of this electric energy transducer of filtering;
A compensation capacitors, this compensation capacitors and this filter inductor group tandem compound, this compensation capacitors is as the idle producing component of this electric-power filter;
A filtering capacitor resistor group, it all links to each other with the AC power feeder line with the tandem compound of this filter inductor group and compensation capacitors; This filtering capacitor resistor assembly is should the filter inductor group, the harmonic wave that this electric energy transducer of filtering produces; And
A control circuit, it is in order to the switching signal of the electronic power switch element group that produces this electric energy transducer, so that this electric energy transducer produces an offset current and is injected into this AC power feeder line, so that the harmonic current that the filtering load produces, make the electric current of power supply level off to sine wave.
2. phase three-wire three formula active electric power filter as claimed in claim 1 is characterized in that this filter inductor group comprises three inductors; This compensation capacitors then comprises three AC capacitor.
3. phase three-wire three formula active electric power filter as claimed in claim 2, it is characterized in that, three inductors of this filter inductor group are connected with three AC capacitor of this compensation capacitors respectively, what wherein the tandem compound of two inductors and AC capacitor was connected in phase three-wire three formula power supply appoints two of two-phase alternating current source feeder line and this electric energy transducer to exchange between the end, and the tandem compound of another inductor and AC capacitor then is connected between the negative terminal of dc terminal of another cross streams power feeder of phase three-wire three formula power supply and this electric energy transducer.
4. phase three-wire three formula active electric power filter as claimed in claim 2, it is characterized in that, three inductors of this filter inductor group are connected with three AC capacitor of this compensation capacitors respectively, wherein two inductors and the tandem compound of AC capacitor be connected in phase three-wire three formula power supply appoint two-phase alternating current source feeder line and this electric energy transducer two to exchange to hold between, the tandem compound of another inductor and AC capacitor then is connected between the anode of dc terminal of another cross streams power feeder of phase three-wire three formula power supply and this electric energy transducer.
5. phase three-wire three formula active electric power filter as claimed in claim 1, it is characterized in that this control circuit comprises a load harmonic compensation loop, a supply harmonic suppresses loop, an electric energy transducer harmonic wave inhibition loop, a storage capacitor loop of voltage regulation, an adder and a pulse width modulator.
6. phase three-wire three formula active electric power filter as claimed in claim 5, it is characterized in that, this load harmonic compensation loop is taken out harmonic components with the load current that detects through one first band stop filter filtering first-harmonic composition, again with this harmonic components behind a proportional plus integral plus derivative controller, try to achieve the harmonic components of load current, it is as the output signal in this load harmonic compensation loop.
7. phase three-wire three formula active electric power filter as claimed in claim 5, it is characterized in that, this supply harmonic inhibition loop will detect the AC power electric current and deliver to one second band stop filter filtering first-harmonic, take out its characteristic frequency composition through one first band pass filter again, if the AC power electric current still has harmonic wave behind this load harmonic compensation loop compensation, then suppress the loop and detect this harmonic wave, amplify the output signal that suppresses the loop as this supply harmonic through one first amplifier again via this supply harmonic.
8. phase three-wire three formula active electric power filter as claimed in claim 5, it is characterized in that, the output current that this electric energy transducer harmonic wave inhibition loop will detect this electric energy transducer takes out its first-harmonic through one second band pass filter, subtract each other through output current and its first-harmonic of a subtracter again this electric energy transducer, to take out the harmonic components of this electric energy transducer output current, amplify the output signal that suppresses the loop as this electric energy transducer harmonic wave through one second amplifier again.
9. phase three-wire three formula active electric power filter as claimed in claim 5, it is characterized in that, this storage capacitor loop of voltage regulation utilizes a low pass filter to detect the voltage of this storage capacitor, deliver to a subtracter again, after this subtracter itself and a setting voltage subtract each other, to subtract each other the result and deliver to a controller, the output of the output of this controller and one second band pass filter after a multiplier multiplies each other as the output signal of this storage capacitor loop of voltage regulation.
10. phase three-wire three formula active electric power filter as claimed in claim 5, it is characterized in that, this load harmonic compensation loop, supply harmonic suppress the output of loop, electric energy transducer harmonic wave inhibition loop and storage capacitor loop of voltage regulation through an adder addition, its addition result are produced again the output signal of this control circuit through this pulse width modulator.
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| CNB2004100573480A CN100399666C (en) | 2004-08-26 | 2004-08-26 | Three-phase three-wire type active electric filter |
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| CNB2004100573480A CN100399666C (en) | 2004-08-26 | 2004-08-26 | Three-phase three-wire type active electric filter |
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| CN100399666C true CN100399666C (en) | 2008-07-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101051750B (en) * | 2006-04-06 | 2011-07-13 | 广东工业大学 | Voltage external fixed gradual control method for power autive filter |
| CN101924368B (en) * | 2010-09-08 | 2012-06-27 | 山东山大华天科技股份有限公司 | Active power filter device and control method thereof |
| CN103296907B (en) * | 2012-03-02 | 2015-05-06 | 台达电子企业管理（上海）有限公司 | Multilevel inverter and active power filter system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5321598A (en) * | 1992-09-18 | 1994-06-14 | Westinghouse Electric Corp. | Three-phase active filter utilizing rotating axis transformation |
| US5465203A (en) * | 1993-06-18 | 1995-11-07 | Electric Power Research Institute, Inc. | Hybrid series active/parallel passive power line conditioner with controlled harmonic injection |
| CN1274977A (en) * | 2000-06-16 | 2000-11-29 | 清华大学 | Combined power filter with both active and passive parts |
| CN1449083A (en) * | 2002-03-11 | 2003-10-15 | 盈正豫顺电子股份有限公司 | Active harmonic wave suppressing device and control method |
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2004
- 2004-08-26 CN CNB2004100573480A patent/CN100399666C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5321598A (en) * | 1992-09-18 | 1994-06-14 | Westinghouse Electric Corp. | Three-phase active filter utilizing rotating axis transformation |
| US5465203A (en) * | 1993-06-18 | 1995-11-07 | Electric Power Research Institute, Inc. | Hybrid series active/parallel passive power line conditioner with controlled harmonic injection |
| CN1274977A (en) * | 2000-06-16 | 2000-11-29 | 清华大学 | Combined power filter with both active and passive parts |
| CN1449083A (en) * | 2002-03-11 | 2003-10-15 | 盈正豫顺电子股份有限公司 | Active harmonic wave suppressing device and control method |
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