CN103762828B - A kind of control method and device of multistage power electronic converter system - Google Patents
A kind of control method and device of multistage power electronic converter system Download PDFInfo
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- CN103762828B CN103762828B CN201310750056.4A CN201310750056A CN103762828B CN 103762828 B CN103762828 B CN 103762828B CN 201310750056 A CN201310750056 A CN 201310750056A CN 103762828 B CN103762828 B CN 103762828B
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Abstract
This application provides a kind of control method and device of multistage power electronic converter system, methods described includes：Determine the current input/output condition of the multistage power electronic converter system；The corresponding busbar voltage optimal solution of the current input/output condition is obtained from preset data file, when the busbar voltage optimal solution is the product maximum of the efficiency of converters at different levels in the multistage power electronic converter system, the magnitude of voltage of the bus between two adjacent converters of corresponding rank；It is that corresponding bus sets corresponding magnitude of voltage according to the busbar voltage optimal solution.Because the application is by making the efficiency of multistage power electronic converter system reach maximum the optimization of control method, independent of the innovation of any device, therefore the cost of whole multistage power electronic converter system is reduced.
Description
Technical field
The application is related to converters field, more particularly to a kind of control of multistage power electronic converter system
Method and device.
Background technology
In converters, it is considered to reliability, input and output insulation and the optimization designed of circuit, often adopt
Use multi-level pmultistage circuit structure.
As energy problem is increasingly serious, to the requirement more and more higher of the energy conversion efficiency of converters.It is right
For multistage power electronic converter system, the efficiency of whole system is equal to the efficiency product of converters at different levels.
The efficiency of whole system is improved at present, the innovation of device is depended on mostly, such as using switching loss is lower, on-state
The lower device for power switching of impedance, the lower magnetic device of core loss, but whole system is improved by the innovation of device
The efficiency of system, can cause the cost of whole system increases.
The content of the invention
In order to solve the above technical problems, the embodiment of the present application provides a kind of controlling party of multistage power electronic converter system
Method and device, to reach the purpose of reduction system cost, technical scheme is as follows：
A kind of control method of multistage power electronic converter system, including：
Determine the current input/output condition of the multistage power electronic converter system；
The corresponding busbar voltage optimal solution of the current input/output condition, the bus are obtained from preset data file
When voltage optimal solution is the product maximum of the efficiency of converters at different levels in the multistage power electronic converter system,
The magnitude of voltage of bus between two adjacent converters of corresponding rank；
It is that corresponding bus sets corresponding magnitude of voltage according to the busbar voltage optimal solution.
It is preferred that, in the case where the multistage power electronic converter system is two stage power electronic converter system,
The generating process of the busbar voltage optimal solution, including：
In the case where input/output condition is fixed, the adjusting range of the busbar voltage between two converters is determined；
It is each right when the busbar voltage is each magnitude of voltage in the adjusting range that two converters are measured respectively
The efficiency answered；
Calculate the product of the efficiency of corresponding two converters of each magnitude of voltage in the adjusting range；
According to the result calculated, it is busbar voltage optimal solution to determine the corresponding magnitude of voltage of max product.
It is preferred that, in the case where the multistage power electronic converter system is two stage power electronic converter system,
The generating process of the busbar voltage optimal solution, including：
In the case where input/output condition is fixed, the adjusting range of the busbar voltage between two converters is determined；
It is each representative electricity in the adjusting range that two converters are measured respectively in the busbar voltage
Each self-corresponding efficiency during pressure value；
Fitting algorithm is used to obtain two converters representative to be removed in the adjusting range in the busbar voltage
Magnitude of voltage outside magnitude of voltage when corresponding efficiency；
Calculate the product of the efficiency of corresponding two converters of each magnitude of voltage in the adjusting range；
According to the result calculated, it is busbar voltage optimal solution to determine the corresponding magnitude of voltage of max product.
It is preferred that, it is each magnitude of voltage in the adjusting range in the busbar voltage to measure two obtained converters
When each self-corresponding efficiency, characterized by efficiency change line.
It is preferred that, the determination process of the adjusting range is specially：
According to the input and output voltage condition of two stage power electronic converter system and the physical circuit of converter at different levels
Topological sum uses the pressure-resistant of device, determines the adjusting range of the busbar voltage.
A kind of control device of multistage power electronic converter system, including：
First determining unit, the current input/output condition for determining the multistage power electronic converter system；
First acquisition unit, for obtaining the corresponding bus electricity of the current input/output condition from preset data file
Optimal solution is pressed, the busbar voltage optimal solution is converters at different levels in the multistage power electronic converter system
When the product of efficiency is maximum, the magnitude of voltage of the bus between two adjacent converters of corresponding rank；
Setting unit, for according to the busbar voltage optimal solution, being that corresponding bus sets corresponding magnitude of voltage.
It is preferred that, including：
Second determining unit, in the case of being fixed in input/output condition, determines the bus between two converters
The adjusting range of voltage；
First measuring unit, is each in the adjusting range for measuring two converters respectively in the busbar voltage
Each self-corresponding efficiency during individual magnitude of voltage；
First computing unit, the efficiency for calculating each magnitude of voltage in the adjusting range corresponding two converters
Product；
3rd determining unit, for according to the result calculated, determining the corresponding magnitude of voltage of max product for busbar voltage most
Excellent solution.
It is preferred that, including：
4th determining unit, in the case of being fixed in input/output condition, determines the bus between two converters
The adjusting range of voltage；
Second measuring unit, is each in the adjusting range for measuring two converters respectively in the busbar voltage
Each self-corresponding efficiency during individual representative magnitude of voltage；
Second acquisition unit, for using fitting algorithm to obtain two converters in the busbar voltage for the adjustment model
Corresponding efficiency during magnitude of voltage in addition to representative magnitude of voltage in enclosing；
Second computing unit, the efficiency for calculating each magnitude of voltage in the adjusting range corresponding two converters
Product；
5th determining unit, for according to the result calculated, determining the corresponding magnitude of voltage of max product for busbar voltage most
Excellent solution.
It is preferred that, including：
Characterization unit, for being characterized by efficiency change line, measure two obtained converters is in the busbar voltage
Each self-corresponding efficiency during each magnitude of voltage in the adjusting range.
It is preferred that, second determining unit or the 4th determining unit are specifically for according to two stage power electronic converter system
The input and output voltage condition of system and the physical circuit topological sum of converter at different levels use the pressure-resistant of device, determine the mother
The adjusting range of line voltage.
Compared with prior art, the application has the beneficial effect that：
In this application, due to input voltage, output voltage and power output these three variables are restricted by extraneous factor, no
It is that converter itself can be free to arrange, the only intermediate variable of multilevel converter internal system（That is busbar voltage）Can be by
Converter itself is free to arrange, therefore the control method that the application is proposed is by adjusting intermediate variable（That is busbar voltage）It is whole to make
The efficiency of individual changer system is optimal.Because busbar voltage optimal solution is each in the multistage power electronic converter system
When the product of the efficiency of level converters is maximum, the voltage of the bus between two adjacent converters of corresponding rank
Value, therefore be that corresponding bus sets corresponding magnitude of voltage, corresponding bus sets corresponding according to busbar voltage optimal solution
After magnitude of voltage, the efficiency product of converters at different levels is maximum, so that the efficiency of multistage power electronic converter system
Maximum is reached, the efficiency of multistage power electronic converter system is optimized.
It can be seen that, the application is by reaching the efficiency of multistage power electronic converter system the optimization of control method
Maximum, independent of the innovation of any device, reduces the cost of whole multistage power electronic converter system.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the embodiment of the present application, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present application, for
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these accompanying drawings
His accompanying drawing.
Fig. 1 is a kind of flow chart of the control method for the multistage power electronic converter system that the application is provided；
Fig. 2 is a kind of sub-process figure of the control method for the multistage power electronic converter system that the application is provided；
Fig. 3 is a kind of schematic diagram for the efficiency change line that the application is provided；
Fig. 4 is another schematic diagram for the efficiency change line that the application is provided；
Fig. 5 is another sub-process figure of the control method for the multistage power electronic converter system that the application is provided；
Fig. 6 is a kind of structural representation of the control device for the multistage power electronic converter system that the application is provided.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.It is based on
Embodiment in the application, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of the application protection.
One embodiment
Fig. 1 is referred to, one kind of the control method of the multistage power electronic converter system provided it illustrates the application
Flow chart, may comprise steps of：
Step S11：Determine the current input/output condition of the multistage power electronic converter system.
Step S12：The corresponding busbar voltage optimal solution of the current input/output condition is obtained from preset data file,
The busbar voltage optimal solution is multiplying for the efficiency of converters at different levels in the multistage power electronic converter system
When product is maximum, the magnitude of voltage of the bus between two adjacent converters of corresponding rank.
In the present embodiment, be stored with multiple busbar voltage optimal solutions in preset data file, correspond to respectively different defeated
Enter output condition, i.e., correspond to a busbar voltage optimal solution under different input/output conditions respectively.
The number of magnitude of voltage in busbar voltage optimal solution is equal to the converter that multistage power electronic converter system includes
Number subtract 1 after numerical value because the number of bus in multistage power electronic converter system subtracts 1 for the number of converter,
Need to meet the corresponding magnitude of voltage of each bus.
Now illustrate to busbar voltage optimal solution is Technics of Power Electronic Conversion at different levels in the multistage power electronic converter system
When the product of the efficiency of device is maximum, the magnitude of voltage of the bus between two adjacent converters of corresponding rank is illustrated, if
Multistage power electronic converter system is 3 grades of converters systems, including 3 converters, before being respectively
Level converter, intergrade converter and rear class converter, are connected between front stage converter and intergrade converter by bus 1,
Connected between intergrade converter and rear class converter by bus 2, then busbar voltage optimal solution is 3 grades of converters
When the product of the efficiency of the efficiency of front stage converter, the efficiency of intergrade converter and rear class converter is maximum in system, correspondence
Front stage converter and intergrade converter between bus 1 magnitude of voltage, intergrade converter and rear class converter between
The magnitude of voltage of bus 2.
Step S13：It is that corresponding bus sets corresponding magnitude of voltage according to the busbar voltage optimal solution.
Still with the example in step S12 to according to busbar voltage optimal solution, being that corresponding bus sets corresponding magnitude of voltage
Illustrate, busbar voltage optimal solution includes two magnitudes of voltage, respectively the magnitude of voltage of the magnitude of voltage of bus 1 and bus 2, then
The magnitude of voltage of bus 1 in busbar voltage optimal solution is set to the magnitude of voltage of bus 1, by the bus in busbar voltage optimal solution
2 magnitude of voltage is set to the magnitude of voltage of bus 2.
It should be noted that when current input/output condition changes, obtaining corresponding from preset data file
The busbar voltage optimal solution of input/output condition is that the change according to input/output condition can be achieved, and respective bus bars are set in real time
Magnitude of voltage, it is ensured that multistage power electronic converter system can remain to reach system effectiveness most with the change of input/output condition
It is excellent.
In this application, due to input voltage, output voltage and power output these three variables are restricted by extraneous factor, no
It is that converter itself can be free to arrange, the only intermediate variable of multilevel converter internal system（That is busbar voltage）Can be by
Converter itself is free to arrange, therefore the control method that the application is proposed is by adjusting intermediate variable（That is busbar voltage）It is whole to make
The efficiency of individual changer system is optimal.Because busbar voltage optimal solution is each in the multistage power electronic converter system
When the product of the efficiency of level converters is maximum, the voltage of the bus between two adjacent converters of corresponding rank
Value, therefore be that corresponding bus sets corresponding magnitude of voltage, corresponding bus sets corresponding according to busbar voltage optimal solution
After magnitude of voltage, the efficiency product of converters at different levels is maximum, so that the efficiency of multistage power electronic converter system
Maximum is reached, the efficiency of multistage power electronic converter system is optimized.
It can be seen that, the application is by reaching the efficiency of multistage power electronic converter system the optimization of control method
Maximum, independent of the innovation of any device, reduces the cost of whole multistage power electronic converter system.
Another embodiment
In the present embodiment, thus it is shown that multistage power electronic converter system be two stage power electronic converter system
In the case of, the generating process of busbar voltage optimal solution refers to Fig. 2, and Fig. 2 is illustrated that the multi-stage power electricity that the application is provided
A kind of sub-process figure of the control method of sub- changer system, may comprise steps of：
Step S21：In the case where input/output condition is fixed, the adjustment of the busbar voltage between two converters is determined
Scope.
The adjusting range for determining the busbar voltage between two converters is specially：According to two stage power electronic converter system
The input and output voltage condition of system and the physical circuit topological sum of converter at different levels use the pressure-resistant of device, determine the mother
The adjusting range of line voltage.
Step S22：It is each magnitude of voltage in the adjusting range that two converters are measured respectively in the busbar voltage
When each self-corresponding efficiency.
Due to only one of which bus between two converters, therefore the adjusting range phase of the busbar voltage of two converters
Together.
It is each magnitude of voltage in the adjusting range now to illustrate to measuring two converters respectively in the busbar voltage
When each self-corresponding efficiency illustrate, such as two converters are respectively front stage converter and rear class converter, then before measuring
Level converter busbar voltage be adjusting range in each magnitude of voltage when corresponding efficiency and measurement rear class converter in bus
Corresponding efficiency when voltage is each magnitude of voltage in adjusting range.If the input voltage of two stage power electronic converter system is
220VAC is constant, then the adjusting range of busbar voltage can be 350V~420V, and measurement translator is adjustment in busbar voltage
Each magnitude of voltage in scope 350V~420V（Such as 350V, 360V, 370V, 380V, 390V, 400V, 410V and 420V）When correspondence
Efficiency（Such as efficiency 1, efficiency 2, efficiency 3, efficiency 4, efficiency 5, efficiency 6, efficiency 7 and efficiency 8）, wherein, the correspondence of efficiency 1
350V, the corresponding 360V of efficiency 2, the corresponding 370V of efficiency 3, the corresponding 380V of efficiency 4, the corresponding 390V of efficiency 5, the corresponding 400V of efficiency 6, effect
The corresponding 410V of rate 7, the corresponding 420V of efficiency 8.
In the present embodiment, what is taken is that measurement translator is each voltage in the adjusting range in the busbar voltage
It is worth the mode of corresponding efficiency.
Step S23：Calculate the product of the efficiency of corresponding two converters of each magnitude of voltage in the adjusting range.
Now illustrate and the product for calculating the efficiency of corresponding two converters of each magnitude of voltage in the adjusting range is carried out
Illustrate, for example, each interior magnitude of voltage of adjusting range is respectively 350V, 360V, 370V, 380V, 390V, 400V, 410V and 420V,
Two converters are respectively front stage converter and rear class converter, and the efficiency of the corresponding front stage converters of 350V is efficiency a1, it is right
The efficiency for the rear class converter answered is efficiency b1, the efficiency of the corresponding front stage converters of 360V is efficiency a2, corresponding rear class conversion
The efficiency of device is efficiency b2, the efficiency of the corresponding front stage converters of 370V is efficiency a3, the efficiency of corresponding rear class converter is effect
Rate b3... ..., the efficiency of the corresponding front stage converters of 420V is efficiency a8, the efficiency of corresponding rear class converter is efficiency b8, meter
Calculate the efficiency a of the corresponding front stage converters of 350V1With the efficiency b of rear class converter1Product, calculate product for a1*b1, meter
Calculate the efficiency a of the corresponding front stage converters of 360V2With the efficiency b of rear class converter2Product, calculate product for a2*b2, meter
Calculate the efficiency a of the corresponding front stage converters of 370V3With the efficiency b of rear class converter3Product, calculate product for a3*
b3... ..., calculate the efficiency a of the corresponding front stage converters of 420V8With the efficiency b of rear class converter8Product, calculate product
For a8*b8。
Step S24：According to the result calculated, it is busbar voltage optimal solution to determine the corresponding magnitude of voltage of max product.
In the present embodiment, using the corresponding magnitude of voltage of max product as busbar voltage optimal value, such as：If in step S23
In example in a8*b8For max product, then a8*b8Corresponding magnitude of voltage is busbar voltage optimal solution.
Obtained two converters are measured when the busbar voltage is each magnitude of voltage in the adjusting range each
Corresponding efficiency can be characterized by efficiency change line.Efficiency change line specifically may refer to Fig. 3, and Fig. 3 shows that the application is carried
Transverse axis in a kind of schematic diagram of the efficiency change line of confession, Fig. 3 is busbar voltage, and Vbus1~Vbus2 is the busbar voltage determined
Adjusting range, the longitudinal axis is efficiency, and e1 is corresponding efficiency when busbar voltage is Vbus2, and e2 is when busbar voltage is Vbus1 pair
The efficiency answered.
It is described to characterizing two converters in the busbar voltage now still by taking two stage power electronic converter system as an example
The generating process of the efficiency change line of each self-corresponding efficiency during each magnitude of voltage in adjusting range, and determine busbar voltage most
The process of excellent solution is illustrated.For example：Fixed in input condition, in the case of output condition is unfixed：
Step A11：Determine intermediate variable（Busbar voltage）Adjustable range.If front stage converter is boost conversion
Device, input voltage is that 220VAC is constant, then the adjusting range of busbar voltage can be 350V~420V.
Step A12：Measure front stage converter the busbar voltage be the adjusting range in each magnitude of voltage when pair
The efficiency answered, obtains efficiency change line.Input voltage is fixed as civil power, and power output is that real work power immobilizes.Only
The amount of one change is busbar voltage.By actual measurement, transverse axis can be obtained for busbar voltage, the longitudinal axis is in busbar voltage adjustment
In the range of the corresponding efficiency of each magnitude of voltage, efficiency change line is as shown in Figure 3.
Step A13：Measure rear class converter the busbar voltage be the adjusting range in each magnitude of voltage when pair
The efficiency answered, obtains efficiency change line, and output voltage can choose representational several groups of data in output voltage range, than
Such as this four points of 220,300,400,450V.Power output is that real work power immobilizes.We can have generation each
On the output voltage point of table, by actual measurement, transverse axis is obtained for busbar voltage, the longitudinal axis is in busbar voltage adjusting range
The corresponding efficiency of each magnitude of voltage, efficiency change line are as shown in figure 4, Fig. 4 is illustrated that the efficiency change line that the application is provided
Another schematic diagram.
Because output voltage have chosen 220,300,400,450V this four points, therefore rear class converter is in each output electricity
An efficiency change line is all corresponded on pressure point, 4 efficiency curves are finally given.
Step A14：When 2 stage converter tandem working, it is assumed that now output voltage is on 220V this aspect, before calling
Efficiency curve of efficiency change line and the rear class converter of level converter on 220V this aspect does the operation that is multiplied, and finds product most
Big point, this puts the best effort that corresponding busbar voltage is exactly the busbar voltage optimal solution, i.e. whole system of whole system
Point.If output voltage rises to 300V, the corresponding curves of rear class 300V are called to be used to calculate.By that analogy.If output
Some of voltage between these particular job points numerically, can use the method or other similar methods of fitting, indirectly
Rear class converter is obtained in the efficiency change line of this operating point, optimal busbar voltage is obtained.
Further embodiment
In the present embodiment, the process of the efficiency change line of converters at different levels is determined to three-class power electronic converter system
Illustrated with the process for determining busbar voltage optimal solution.
In the case where input and output voltage condition is fixed：
Step A21：Determine the adjusting range of the busbar voltage on intergrade both sides
Device is used according to the physical circuit topological sum of the input and output voltage scope of converter and converter at different levels
It is pressure-resistant, to determine the busbar voltage 1 between prime and intergrade（Vbus1）Adjusting range and intergrade and rear class between
Busbar voltage 2（Vbus2）Adjusting range.
Step A22：Obtain the efficiency change line of front stage converter
Input voltage is fixed as nominal input voltage, and power output is actual rated power.The amount uniquely changed is bus
Voltage Vbus1.By actual measurement, transverse axis can be obtained for busbar voltage Vbus1, the longitudinal axis is in Vbus1 adjusting range
The corresponding efficiency of each magnitude of voltage, obtains the efficiency transformation line of front stage converter.
Step A23：Obtain the efficiency change line of rear class converter
Output voltage is fixed as rated output voltage, and power output is actual rated power.The amount uniquely changed is bus
Voltage Vbus2.By actual measurement, transverse axis can be obtained for busbar voltage Vbus2, the longitudinal axis is in Vbus2 adjusting range
The corresponding efficiency of each magnitude of voltage, obtains the efficiency change line of rear class converter.
Step A24：Obtain the efficiency change line of intergrade converter
Appropriate number of point is selected in Vbus1 working range, for example：Vbus11, Vbus12, Vbus13, for not
Same Vbus1, we, which can measure, obtains different using Vbus2 as transverse axis, and efficiency is the efficiency change line of the longitudinal axis, power output
Immobilized for real work power.
Step A25：Optimal working point is obtained according to efficiency change line（Busbar voltage optimal solution）
When three-level converter tandem working, input voltage and output voltage are rated voltage.Prime is called to become respectively
The efficiency change line of parallel operation is in Vbus11, Vbus12, the efficiency value and the corresponding effect of intergrade converter of these points of Vbus13
Rate changes line and the efficiency change line of rear class converter carries out multiplication operation, finds the maximum point of product, and this puts corresponding mother
Line voltage Vbus1 and Vbus2 are exactly the best operating point of now whole system.For previously selected Vbus11, Vbus12,
Point in the middle of Vbus13 data, can be obtained using the method for fitting, to find more accurate optimum point.
In the case of output voltage is unfixed：
Step A21, step A22, step A24 steps are constant.
Step A23 is changed into：
Appropriate number of point is selected in the working range of output voltage, for example：Vo1, Vo2, Vo3, for different Vo,
We, which can measure, obtains using different Vbus2 as transverse axis, and efficiency is the efficiency change line of the longitudinal axis, and power output is real work
Power immobilizes.
Step A25 is changed into：
The efficiency change line of rear class converter will call the corresponding efficiency change line of current output voltage, if current is defeated
Go out voltage in selected numerical value（That is Vo1, Vo2, Vo3）Between if, can with fitting method obtain current output voltage
Corresponding efficiency change line.The efficiency change line of front stage converter is in Vbus11, Vbus12, the efficiency value of these points of Vbus13
The efficiency change line of each bar efficiency change line and rear class converter correspondence current output voltage corresponding with intergrade is multiplied, and looks for
To the maximum of product, maximum product corresponding Vbus1 and Vbus2 is exactly the corresponding best operating point of current output voltage
（That is the corresponding busbar voltage optimal solution of current output voltage）., can be according to described above if output voltage changes
Method, which is recalculated, obtains corresponding best operating point.
In the case of input voltage is unfixed, the process in the case of such as output voltage is unfixed will not be repeated here.
Process and determination bus certainly for the efficiency change line of multistage power electronic converter system more than three-level
The process of voltage optimal solution and the process and determination busbar voltage of the efficiency change line of three-class power electronic converter system are optimal
The unity of thinking of the process of solution, will not be repeated here.
Further embodiment
In the present embodiment, thus it is shown that multistage power electronic converter system be two stage power electronic converter system
In the case of, another generating process of busbar voltage optimal solution refers to Fig. 5, and Fig. 5 is illustrated that the multistage that the application is provided
Another sub-process figure of the control method of converters system, may comprise steps of：
Step S51：In the case where input/output condition is fixed, the adjustment of the busbar voltage between two converters is determined
Scope.
Step S52：Respectively measure two converters the busbar voltage be the adjusting range in each there is generation
Each self-corresponding efficiency during the magnitude of voltage of table.
In the present embodiment, several representative magnitudes of voltage are chosen out of adjusting range, two converters of measurement exist
Each self-corresponding efficiency when the busbar voltage is each representative magnitude of voltage in the adjusting range.
Step S53：Use fitting algorithm to obtain two converters in the busbar voltage to remove in the adjusting range to have
Corresponding efficiency during magnitude of voltage outside representational magnitude of voltage.
In the present embodiment, it is each in the adjusting range measuring two converters respectively in the busbar voltage
During individual representative magnitude of voltage after each self-corresponding efficiency, two converters are obtained in the bus using fitting algorithm
Corresponding efficiency when voltage is the magnitude of voltage in addition to representative magnitude of voltage in the adjusting range, specifically：With horizontal stroke
Axle is busbar voltage, identifies the adjusting range of busbar voltage on transverse axis, the longitudinal axis be adjusting range in it is representative
Each self-corresponding efficiency of each magnitude of voltage, it is with a line that representative each magnitude of voltage in adjusting range is each right
The efficiency answered is connected, and depicts an efficiency change line, the tune can be got from the efficiency transformation line depicted
The corresponding efficiency of magnitude of voltage in whole scope in addition to representative magnitude of voltage.
The magnitude of voltage in the adjusting range in addition to representative magnitude of voltage is obtained by the way of fitting algorithm
Corresponding efficiency efficiency corresponding compared to the measurement shown in Fig. 2 each magnitude of voltage, can more accurately calculate efficiency product most
Corresponding bus voltage value when big, i.e., under conditions of input/output condition determination, can obtain more excellent busbar voltage optimal
Solution.
Step S54：Calculate the product of the efficiency of corresponding two converters of each magnitude of voltage in the adjusting range.
Step S55：According to the result calculated, it is busbar voltage optimal solution to determine the corresponding magnitude of voltage of max product.
For foregoing each method embodiment, in order to be briefly described, therefore it is all expressed as to a series of combination of actions, but
It is that those skilled in the art should know, the application is not limited by described sequence of movement, because according to the application, certain
A little steps can be carried out sequentially or simultaneously using other.Secondly, those skilled in the art should also know, be retouched in specification
The embodiment stated belongs to preferred embodiment, necessary to involved action and module not necessarily the application.
Corresponding with above method embodiment, this application provides a kind of control of multistage power electronic converter system dress
Put, refer to Fig. 6, Fig. 6 is illustrated that a kind of knot of the control device for the multistage power electronic converter system that the application is provided
Structure schematic diagram, the control device of multistage power electronic converter system includes：First determining unit 61, the and of first acquisition unit 62
Setting unit 63.
First determining unit 61, the current input/output condition for determining the multistage power electronic converter system.
First acquisition unit 62, for obtaining the corresponding bus of the current input/output condition from preset data file
Voltage optimal solution, the busbar voltage optimal solution is converters at different levels in the multistage power electronic converter system
Efficiency product it is maximum when, the magnitude of voltage of the bus between two adjacent converters of corresponding rank.
Setting unit 63, for according to the busbar voltage optimal solution, being that corresponding bus sets corresponding magnitude of voltage.
Wherein, the control device of the multistage power electronic converter system shown in Fig. 6 can include：Second determining unit,
First measuring unit, the first computing unit and the 3rd determining unit.Second determining unit, the first measuring unit, first calculate single
Member and the 3rd determining unit complete the determination process of busbar voltage optimal solution jointly, specifically：
Second determining unit, in the case of being fixed in input/output condition, determines the bus between two converters
The adjusting range of voltage.
Second determining unit, specifically for the input and output voltage condition according to two stage power electronic converter system and
The physical circuit topological sum of converters at different levels uses the pressure-resistant of device, determines the adjusting range of the busbar voltage.
First measuring unit, is each in the adjusting range for measuring two converters respectively in the busbar voltage
Each self-corresponding efficiency during individual magnitude of voltage.
First computing unit, the efficiency for calculating each magnitude of voltage in the adjusting range corresponding two converters
Product.
3rd determining unit, for according to the result calculated, determining the corresponding magnitude of voltage of max product for busbar voltage most
Excellent solution.
Characterization unit included by the control device of multistage power electronic converter system shown in Fig. 6 can pass through efficiency
Two converters that change line the first measuring unit measurement of sign is obtained are each in the adjusting range in the busbar voltage
Each self-corresponding efficiency during individual magnitude of voltage.
The control device of multistage power electronic converter system shown in Fig. 6 can include：4th determining unit, second are surveyed
Measure unit, second acquisition unit, the second computing unit and the 5th determining unit.4th determining unit, the second measuring unit, second
Acquiring unit, the second computing unit and the 5th determining unit can also complete the determination process of busbar voltage optimal solution jointly, tool
Body：
4th determining unit, in the case of being fixed in input/output condition, determines the bus between two converters
The adjusting range of voltage.
4th determining unit, specifically for the input and output voltage condition according to two stage power electronic converter system and
The physical circuit topological sum of converters at different levels uses the pressure-resistant of device, determines the adjusting range of the busbar voltage.
Second measuring unit, is each in the adjusting range for measuring two converters respectively in the busbar voltage
Each self-corresponding efficiency during individual representative magnitude of voltage.
Second acquisition unit, for using fitting algorithm to obtain two converters in the busbar voltage for the adjustment model
Corresponding efficiency during magnitude of voltage in addition to representative magnitude of voltage in enclosing.
Second computing unit, the efficiency for calculating each magnitude of voltage in the adjusting range corresponding two converters
Product.
5th determining unit, for according to the result calculated, determining the corresponding magnitude of voltage of max product for busbar voltage most
Excellent solution.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation be all between difference with other embodiment, each embodiment identical similar part mutually referring to.
For device class embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is joined
See the part explanation of embodiment of the method.
Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include that
A little key elements, but also other key elements including being not expressly set out, or also include be this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except also there is other identical element in the process including the key element, method, article or equipment.
For convenience of description, it is divided into various units during description apparatus above with function to describe respectively.Certainly, this is being implemented
The function of each unit can be realized in same or multiple softwares and/or hardware during application.
The control method and device to a kind of multistage power electronic converter system provided herein are carried out above
It is discussed in detail, specific case used herein is set forth to the principle and embodiment of the application, above example
Illustrate that being only intended to help understands the present processes and its core concept；Simultaneously for those of ordinary skill in the art, according to
According to the thought of the application, it will change in specific embodiments and applications, in summary, this specification content
It should not be construed as the limitation to the application.
Claims (6)
1. a kind of control method of multistage power electronic converter system, it is characterised in that including：
Determine the current input/output condition of the multistage power electronic converter system；
The corresponding busbar voltage optimal solution of the current input/output condition, the busbar voltage are obtained from preset data file
When optimal solution is the product maximum of the efficiency of converters at different levels in the multistage power electronic converter system, correspondence
Adjacent two converters of rank between bus magnitude of voltage；
It is that corresponding bus sets corresponding magnitude of voltage according to the busbar voltage optimal solution；
In the case where the multistage power electronic converter system is two stage power electronic converter system, the busbar voltage
The generating process of optimal solution, including：
In the case where input/output condition is fixed, the adjusting range of the busbar voltage between two converters is determined；
It is each self-corresponding when the busbar voltage is each magnitude of voltage in the adjusting range that two converters are measured respectively
Efficiency；
Calculate the product of the efficiency of corresponding two converters of each magnitude of voltage in the adjusting range；
According to the result calculated, it is busbar voltage optimal solution to determine the corresponding magnitude of voltage of max product；
In the case where the multistage power electronic converter system is two stage power electronic converter system, the busbar voltage
The generating process of optimal solution, including：
In the case where input/output condition is fixed, the adjusting range of the busbar voltage between two converters is determined；
It is each representative magnitude of voltage in the adjusting range that two converters are measured respectively in the busbar voltage
When each self-corresponding efficiency；
It is except representative electricity in the adjusting range to use fitting algorithm to obtain two converters in the busbar voltage
Corresponding efficiency during magnitude of voltage outside pressure value；
Calculate the product of the efficiency of corresponding two converters of each magnitude of voltage in the adjusting range；
According to the result calculated, it is busbar voltage optimal solution to determine the corresponding magnitude of voltage of max product.
2. according to the method described in claim 1, it is characterised in that measure two obtained converters is in the busbar voltage
Each self-corresponding efficiency during each magnitude of voltage in the adjusting range, is characterized by efficiency change line.
3. according to the method described in claim 1, it is characterised in that the determination process of the adjusting range, it is specially：
According to the physical circuit of the input and output voltage condition of two stage power electronic converter system and converter at different levels topology
It is pressure-resistant with used device, determine the adjusting range of the busbar voltage.
4. a kind of control device of multistage power electronic converter system, it is characterised in that including：
First determining unit, the current input/output condition for determining the multistage power electronic converter system；
Second determining unit, in the case of being fixed in input/output condition, determines the busbar voltage between two converters
Adjusting range；
First measuring unit, is each electricity in the adjusting range for measuring two converters respectively in the busbar voltage
Each self-corresponding efficiency during pressure value；
First computing unit, the efficiency for calculating each magnitude of voltage in the adjusting range corresponding two converters multiplies
Product；
3rd determining unit, for according to the result calculated, determining that the corresponding magnitude of voltage of max product is busbar voltage optimal solution；
4th determining unit, in the case of being fixed in input/output condition, determines the busbar voltage between two converters
Adjusting range；
Second measuring unit, is each tool in the adjusting range for measuring two converters respectively in the busbar voltage
Each self-corresponding efficiency during representational magnitude of voltage；
Second acquisition unit, for using fitting algorithm to obtain two converters in the busbar voltage in the adjusting range
Corresponding efficiency during magnitude of voltage in addition to representative magnitude of voltage；
Second computing unit, the efficiency for calculating each magnitude of voltage in the adjusting range corresponding two converters multiplies
Product；
5th determining unit, for according to the result calculated, determining that the corresponding magnitude of voltage of max product is busbar voltage optimal solution；
First acquisition unit, for obtaining the corresponding busbar voltage of the current input/output condition from preset data file most
Excellent solution, the busbar voltage optimal solution is the efficiency of converters at different levels in the multistage power electronic converter system
Product it is maximum when, the magnitude of voltage of the bus between two adjacent converters of corresponding rank；
Setting unit, for according to the busbar voltage optimal solution, being that corresponding bus sets corresponding magnitude of voltage.
5. device according to claim 4, it is characterised in that including：
Characterization unit, for being characterized by efficiency change line, it is described in the busbar voltage to measure two obtained converters
Each self-corresponding efficiency during each magnitude of voltage in adjusting range.
6. device according to claim 4, it is characterised in that second determining unit or the 4th determining unit are specifically used
In input and output voltage condition and the physical circuit topological sum of converter at different levels according to two stage power electronic converter system
Used device it is pressure-resistant, determine the adjusting range of the busbar voltage.
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| EP3364519A1 (en) * | 2017-02-15 | 2018-08-22 | ABB Schweiz AG | Method for controlling electric power conversion system and control arrangement for electric power conversion system |
| CN113555957B (en) * | 2020-04-24 | 2023-12-29 | 南京南瑞继保电气有限公司 | Coordinated control system and control method for power electronic converter |
| CN111628660B (en) * | 2020-06-05 | 2021-08-27 | 浙江鲲悟科技有限公司 | Compressor variable frequency speed regulating system and control method of direct current bus voltage |
| CN113110683B (en) * | 2021-03-30 | 2022-12-06 | 漳州科华技术有限责任公司 | Power efficiency adjusting method, terminal and computer readable storage medium |
| CN115051534B (en) * | 2022-06-06 | 2023-04-07 | 浙江网新智能技术有限公司 | Cascade power supply system with self-adaptive adjustment of intermediate bus voltage and control method |
| CN115642784B (en) * | 2022-12-23 | 2023-03-21 | 浙江大学杭州国际科创中心 | Power supply system control method and power supply system |
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| CN101626196A (en) * | 2009-08-05 | 2010-01-13 | 华东交通大学 | Control method for improving efficiency of two-stage current transformer |
| CN101860041A (en) * | 2010-05-04 | 2010-10-13 | 合肥阳光电源有限公司 | Method for dynamically adjusting busbar voltage to improve grid connection efficiency |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101626196A (en) * | 2009-08-05 | 2010-01-13 | 华东交通大学 | Control method for improving efficiency of two-stage current transformer |
| CN101860041A (en) * | 2010-05-04 | 2010-10-13 | 合肥阳光电源有限公司 | Method for dynamically adjusting busbar voltage to improve grid connection efficiency |
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