CN116054546A - Bus balance bridge control method and device and power supply system - Google Patents
Bus balance bridge control method and device and power supply system Download PDFInfo
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- CN116054546A CN116054546A CN202211528261.1A CN202211528261A CN116054546A CN 116054546 A CN116054546 A CN 116054546A CN 202211528261 A CN202211528261 A CN 202211528261A CN 116054546 A CN116054546 A CN 116054546A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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Abstract
The invention provides a bus balance bridge control method, a bus balance bridge control device and a power supply system, wherein the method belongs to the technical field of circuit control, and comprises the following steps: acquiring a first duty ratio adjustment amount; the first duty ratio adjustment amount is a duty ratio adjustment amount which is calculated in advance and used for carrying out voltage equalizing control on the bus balance bridge; determining a correction parameter corresponding to the first duty cycle adjustment amount according to a preset duty cycle range to which the first duty cycle adjustment amount belongs; each preset duty ratio range corresponds to a correction parameter, and the closer a certain preset duty ratio range is to the optimal regulation range corresponding to the bus balance bridge, the smaller the corresponding correction parameter is; correcting the first duty ratio adjustment amount based on the correction parameter to obtain a second duty ratio adjustment amount; and controlling the bus balance bridge based on the second duty ratio adjustment amount. The invention can effectively improve the voltage equalizing control efficiency of the bus balance bridge while ensuring the stability of the circuit.
Description
Technical Field
The invention belongs to the technical field of circuit control, and particularly relates to a bus balance bridge control method and device and a power supply system.
Background
In order to prevent the busbar voltage of the power supply from deviating, a balance bridge is usually arranged between the positive busbar and the negative busbar to perform voltage equalizing on the positive busbar and the negative busbar. In the prior art, the controller is used for calculating the duty ratio adjustment quantity corresponding to the bus balance bridge, and then the bus balance bridge is controlled based on the calculated duty ratio adjustment quantity.
On the basis, the inventor of the application finds that when the bus balance bridge is controlled, the duty ratio adjustment amount is generally gradually increased, and in the process, the duty ratio adjustment amount is subjected to a stage with poor regulation and control effects, so that the voltage equalizing control efficiency of the bus balance bridge is affected.
Accordingly, the present invention aims to provide a solution to the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a bus balance bridge control method, a bus balance bridge control device and a power supply system, which are used for solving the technical problem of low bus balance bridge voltage equalizing control efficiency in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is to provide a bus balance bridge control method, which comprises the following steps:
acquiring a first duty ratio adjustment amount; the first duty ratio adjustment amount is a duty ratio adjustment amount which is calculated in advance and used for carrying out voltage equalizing control on the bus balance bridge;
determining a correction parameter corresponding to the first duty cycle adjustment amount according to a preset duty cycle range to which the first duty cycle adjustment amount belongs; wherein, each preset duty ratio range corresponds to a correction parameter, and the closer a certain preset duty ratio range is to the optimal regulation range corresponding to the bus balance bridge, the smaller the corresponding correction parameter is;
correcting the first duty ratio adjustment amount based on the correction parameter to obtain a second duty ratio adjustment amount;
and controlling the bus balancing bridge based on the second duty ratio adjustment amount. In one possible implementation manner, before determining the correction parameter corresponding to the first duty cycle adjustment amount according to the preset duty cycle range to which the first duty cycle adjustment amount belongs, the bus balance bridge control method further includes: determining at least two preset duty cycle ranges;
the determining the at least two preset duty cycle ranges includes:
determining a variation range of a first duty ratio adjustment amount when the bus balance bridge is controlled;
dividing the variation range of the duty ratio adjustment quantity according to a preset step length to obtain at least two preset duty ratio ranges.
In one possible implementation manner, the correction parameter corresponding to each preset duty cycle range is selected from the preset correction parameter ranges, and the bus balance bridge control method further includes:
determining a preset correction parameter range;
the determining the preset correction parameter range includes:
acquiring inductance corresponding to the bus balance bridge and switching frequency;
and determining a preset correction parameter range according to the inductance and the switching frequency.
In one possible implementation manner, before determining the correction parameter corresponding to the first duty cycle adjustment amount according to the preset duty cycle range to which the first duty cycle adjustment amount belongs, the bus balance bridge control method further includes:
determining a correction parameter corresponding to each preset duty ratio range;
the determining the correction parameter corresponding to each preset duty cycle range comprises the following steps:
acquiring a preset correction parameter range, and determining a sampling interval according to the number of the preset duty ratio ranges and the endpoint value of the correction parameter range;
sampling the correction parameter range at the sampling interval to obtain at least two correction parameters;
and distributing each correction parameter according to the degree that each preset duty ratio range is close to the optimal regulation range, so as to obtain the correction parameter corresponding to each preset duty ratio range.
In one possible implementation manner, the determining the sampling interval according to the number of the preset duty cycle ranges includes:
D S ＝|D max -D min |÷(n-1)
wherein D is S For sampling interval, D max 、D min And n is the number of preset duty ratio ranges for the two end values of the correction parameter range.
In one possible implementation manner, the correction parameter is a coefficient, and the correcting the first duty cycle adjustment based on the correction parameter to obtain a second duty cycle adjustment includes:
D new ＝D old ×ζ
wherein D is old For the first duty cycle adjustment amount, D new Zeta is the correction parameter for the second duty cycle adjustment amount.
In one possible implementation manner, the correction parameter is a compensation amount, and the correcting the first duty cycle adjustment amount based on the correction parameter to obtain a second duty cycle adjustment amount includes:
D new ＝D old +ΔD
wherein D is old For the first duty cycle adjustment amount, D new For the second duty cycle adjustment amount, Δd is the correction parameter.
In one possible implementation manner, the bus balancing bridge control method further includes: determining a first duty cycle adjustment;
the determining the first duty cycle adjustment amount includes:
acquiring the pressure difference between positive and negative buses of the bus balance bridge;
and inputting the differential pressure into a preset controller to obtain a first duty ratio adjustment amount.
In another aspect of the present invention, there is also provided a bus balance bridge control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the bus balance bridge control method described above when executing the computer program.
In still another aspect of the present invention, there is also provided a power supply system including:
the bus bar balance bridge control device described above.
The bus balance bridge control method and device provided by the invention have the beneficial effects that:
in the prior art, when the control efficiency is improved, the controller is generally improved, and the improvement of the control efficiency is realized by modifying the values of related parameters of the controller, but the mode is extremely easy to cause over control, so that the stability of a controlled circuit is influenced. Therefore, compared with the prior art, the invention provides a segmentation correction strategy, namely, the related parameters of the controller are not modified, after the first duty cycle adjustment quantity is determined, the correction parameters corresponding to the first duty cycle adjustment quantity are determined according to the preset duty cycle range to which the first duty cycle adjustment quantity belongs, and the first duty cycle adjustment quantity is corrected through the correction parameters, so that the duty cycle adjustment quantity can fall into the preset optimal regulation range more quickly, and the voltage equalizing control efficiency of the bus balance bridge is improved. In addition, the invention also sets the closer to the optimal regulation and control range, and the smaller the correction parameters, so the invention can effectively avoid the over-control problem brought in the process of improving the voltage equalizing control efficiency, thereby ensuring the circuit stability. Therefore, the invention effectively solves the problems in the prior art.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for controlling a bus balance bridge according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a bus balancing bridge according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a bus balance bridge control device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention will be described in further detail with reference to the drawings and the detailed description.
Referring to fig. 1, fig. 1 is a schematic flow chart of a control method of a bus balance bridge according to an embodiment of the present invention, where the control method of the bus balance bridge is used for performing voltage equalizing control on the bus balance bridge, and the structure of the bus balance bridge may be as shown in fig. 2, and the voltage equalizing of the bus balance bridge is implemented by calculating a duty cycle adjustment amount corresponding to a switching tube in fig. 2 (i.e., switching tubes Q1 and Q2 in a dashed line frame 1 in fig. 2), and controlling the switching tube based on the calculated duty cycle adjustment amount. The bus balance bridge control method comprises the following steps:
s101: a first duty cycle adjustment is obtained. The first duty ratio adjustment amount is a duty ratio adjustment amount calculated in advance for performing voltage equalizing control on the bus bar balance bridge.
In the present embodiment, the first duty adjustment amount is the duty adjustment amount before correction.
S102: and determining a correction parameter corresponding to the first duty cycle adjustment amount according to a preset duty cycle range to which the first duty cycle adjustment amount belongs. Each preset duty ratio range corresponds to a correction parameter, and the closer a certain preset duty ratio range is to an optimal regulation range corresponding to the bus balance bridge, the smaller the corresponding correction parameter is.
In the present embodiment, the correction parameter is used to make the duty ratio adjustment amount fall within the optimum regulation range faster. Wherein the duty cycle adjustment amount includes a first duty cycle adjustment amount and a second duty cycle adjustment amount. In this embodiment, the control efficiency can be improved by performing the voltage equalizing control of the bus bar balancing bridge based on the corrected first duty cycle adjustment amount (i.e., the second duty cycle adjustment amount), and on this basis, the increasing speed of the first duty cycle adjustment amount (i.e., the duty cycle adjustment amount that is not corrected) can be increased, so that both the first duty cycle adjustment amount and the second duty cycle adjustment amount fall into the optimal adjustment range faster.
In this embodiment, at least two continuous duty cycle ranges may be preset to obtain at least two preset duty cycle ranges, and then a correction parameter is determined for each preset duty cycle range to obtain correction parameters corresponding to the preset duty cycle ranges one by one. On the basis, the correction parameter corresponding to the first duty cycle adjustment amount can be determined by determining the preset duty cycle range to which the first duty cycle adjustment amount belongs. That is, the correction parameter corresponding to the preset duty ratio range to which the first duty ratio adjustment amount belongs is determined as the correction parameter corresponding to the first duty ratio adjustment amount.
In this embodiment, the optimal regulation range, that is, the range with a good regulation effect, may be predetermined by the structure of the bus bar balance bridge. For example, in the bus bar balance bridge structure shown in fig. 2, the optimal regulation range is about (0.4 to 0.6). That is, the control effect is most remarkable when the duty ratio adjustment amount is in the range of (0.4 to 0.6). On the basis, correction parameters can be preset, when the preset duty ratio range is closer to the optimal regulation range, the corresponding correction parameters are smaller, and the problem of unstable circuit caused by over-control can be effectively avoided while the regulation effect is improved.
S103: and correcting the first duty ratio adjustment amount based on the correction parameter to obtain a second duty ratio adjustment amount.
In this embodiment, the correction parameter may be a correction coefficient or a compensation amount.
S104: and controlling the bus balance bridge based on the second duty ratio adjustment amount.
In this embodiment, controlling the bus bar balance bridge based on the second duty ratio adjustment amount includes:
and generating a modulation wave according to the second duty ratio adjustment quantity, and inputting the modulation wave into a switching tube of the bus balance bridge so as to perform voltage equalizing control on the bus balance bridge.
In the prior art, when the control efficiency is improved, the controller is generally improved, and the improvement of the control efficiency is realized by modifying the values of related parameters of the controller, but the mode is extremely easy to cause over control, so that the stability of a controlled circuit is influenced. Therefore, unlike the prior art, the embodiment of the invention provides a segmentation correction strategy, namely, the related parameters of the controller are not modified, after the first duty cycle adjustment amount is determined, the correction parameters corresponding to the first duty cycle adjustment amount are determined according to the preset duty cycle range to which the first duty cycle adjustment amount belongs, and then the first duty cycle adjustment amount is corrected through the correction parameters, so that the duty cycle adjustment amount can fall into the preset optimal regulation range more quickly, and the voltage equalizing control efficiency of the bus balance bridge is improved. In addition, as the embodiment of the invention is also provided with the more approximate optimal regulation and control range and the smaller correction parameters, the embodiment of the invention can effectively avoid the over-control problem brought in the process of improving the voltage equalizing control efficiency, thereby ensuring the stability of the circuit. Therefore, the embodiment of the invention effectively solves the problems in the prior art.
In one possible implementation manner, before determining the correction parameter corresponding to the first duty cycle adjustment amount according to the preset duty cycle range to which the first duty cycle adjustment amount belongs, the bus balance bridge control method further includes: at least two preset duty cycle ranges are determined.
Determining at least two preset duty cycle ranges, comprising:
a range of variation of the first duty cycle adjustment amount when the bus bar balance bridge is controlled is determined.
Dividing the variation range of the duty ratio adjustment quantity according to a preset step length to obtain at least two preset duty ratio ranges.
The scheme of this embodiment may be exemplified, for example, the variation range of the first duty cycle adjustment amount is [0 to 0.6], and the preset step size is 0.1, and the preset duty cycle range may be [0,0.1 ], [0.1,0.2 ], [0.2,0.3 ], [0.3,0.4 ], [0.4, 0.5) ], or [0.5,0.6 ].
In this embodiment, the preset step size may be determined according to the voltage fluctuation degree of the circuit in which the bus bar balance bridge is located. For example, the voltage fluctuation frequency of the circuit where the bus balance bridge is located can be obtained, and the preset step size is determined according to the voltage fluctuation frequency. Wherein the preset step size can be inversely related to the voltage fluctuation frequency. That is, the larger the voltage fluctuation frequency is, the smaller the preset step length is, so that the correction range of the correction parameter is thinned to avoid circuit fluctuation caused by over control. In particular implementation, the mapping relation between the preset step length and the voltage fluctuation frequency can be calibrated in advance, and the preset step length corresponding to the current voltage fluctuation frequency is determined according to the preset relation calibrated in advance.
In one possible implementation manner, the correction parameter corresponding to each preset duty cycle range is selected from the preset correction parameter ranges, and the bus balance bridge control method may further include: and determining a preset correction parameter range. Wherein determining a preset correction parameter range includes:
and obtaining the inductance corresponding to the bus balance bridge and the switching frequency.
And determining a preset correction parameter range according to the inductance and the switching frequency.
In this embodiment, when the correction parameter is selected within the preset correction parameter range, the correction parameter may be selected randomly or according to a certain rule, which is not limited in this embodiment.
In this embodiment, the maximum value and the minimum value of the correction parameter may be defined according to the inductance and the switching frequency, so as to determine the correction parameter range, so as to avoid over-control and ensure the circuit stability in the control process of the bus balance bridge.
In one possible implementation manner, before determining the correction parameter corresponding to the first duty cycle adjustment amount according to the preset duty cycle range to which the first duty cycle adjustment amount belongs, the bus balance bridge control method further includes:
and determining a correction parameter corresponding to each preset duty ratio range.
Determining a correction parameter corresponding to each preset duty cycle range comprises the following steps:
and acquiring a preset correction parameter range, and determining a sampling interval according to the number of the preset duty ratio ranges and the endpoint value of the correction parameter range.
And sampling the correction parameter range at sampling intervals to obtain at least two correction parameters.
And distributing each correction parameter according to the degree that each preset duty ratio range is close to the optimal regulation range, so as to obtain the correction parameter corresponding to each preset duty ratio range.
In this embodiment, the maximum value in the preset correction parameter range may be preset according to the actual requirement, where the minimum value in the correction parameter range is determined according to the attribute of the correction parameter. The property of the correction parameter includes a coefficient and a compensation amount, and on the basis of this, if the correction parameter is a coefficient, the minimum value in the correction parameter range is 1. If the correction parameter is a compensation amount, the minimum value in the correction parameter range is 0.
In one possible implementation, determining the sampling interval according to the number of preset duty cycle ranges includes:
D S ＝|D max -min|÷(n-1)
wherein D is S For sampling interval, D max 、D min For correcting the two end values of the parameter range, n is the number of the preset duty cycle range.
In this embodiment, the correction parameters may be sampled from the correction parameter range according to a preset arithmetic rule, that is, after at least two correction parameters are obtained by sampling, each correction parameter is arranged in an arithmetic manner after being ordered according to the size. Wherein the number of correction parameters is the same as the number of preset duty cycle ranges. On the basis, the sampling interval can be determined according to the number of the preset duty ratio ranges and the end value of the correction parameter range, namely, the tolerance in the arithmetic arrangement is determined, and then sampling is carried out in the correction parameter range according to the sampling interval, so that at least two correction parameters are obtained. For example, the correction parameter is a compensation amount, the correction parameter range is [0,2], the preset duty ratio range includes 3, the sampling interval is 1, and the obtained correction parameters are 0, 1, 2.
On the basis, each correction parameter can be distributed according to the degree that each preset duty ratio range approaches to the optimal regulation range, and the correction parameter corresponding to each preset duty ratio range is obtained. That is, the closer a certain preset duty ratio range is to the optimal regulation range, the smaller the corresponding correction parameter is. When the approaching degree of the two preset duty ratio ranges and the optimal regulation range is consistent, the larger the endpoint value corresponding to the preset duty ratio range is, the smaller the correction parameter corresponding to the preset duty ratio range is, so that over control is avoided. On the basis, the embodiment can also ensure the circuit stability in the control process of the bus balance bridge due to the regularity of the correction parameters.
In one possible implementation manner, before determining the correction parameter corresponding to the first duty cycle adjustment amount according to the preset duty cycle range to which the first duty cycle adjustment amount belongs, the bus balance bridge control method further includes:
and determining a correction parameter corresponding to each preset duty ratio range.
Determining a correction parameter corresponding to each preset duty cycle range comprises the following steps:
and acquiring a preset correction parameter range.
And sampling from the correction parameter range according to a preset equal ratio principle to obtain n correction parameters. The equal ratio principle refers to that n correction parameters are arranged in equal ratio after being sequenced according to the size sequence, n is the number of preset duty ratio ranges, and n is more than or equal to 2.
And distributing each correction parameter according to the degree that each preset duty ratio range is close to the optimal regulation range, so as to obtain the correction parameter corresponding to each preset duty ratio range.
In this embodiment, the sampling may also be performed from the correction parameter range by the principle of an equal ratio, and the principle is similar to the principle of an equal difference in the foregoing embodiment, which is not repeated here. For example, if the correction parameter is a coefficient, the correction parameter range is [1,4], and the preset duty cycle range includes 3, the obtained correction parameter may be 1, 2, or 4. On the basis, the embodiment can also ensure the circuit stability in the control process of the bus balance bridge due to the regularity of the correction parameters.
In one possible implementation, the correction parameter is a coefficient, and correcting the first duty cycle adjustment based on the correction parameter to obtain the second duty cycle adjustment includes:
D new ＝ old ×ζ
wherein D is old For a first duty cycle adjustment amount, D new Zeta is a correction parameter for the second duty cycle adjustment amount.
In one possible implementation, the correction parameter is a compensation amount, and correcting the first duty cycle adjustment amount based on the correction parameter to obtain the second duty cycle adjustment amount includes:
D new ＝ old +ΔD
wherein D is old For a first duty cycle adjustment amount, D new For the second duty cycle adjustment amount, Δd is a correction parameter.
In one possible implementation manner, the bus balancing bridge control method further includes: a first duty cycle adjustment is determined.
Determining the first duty cycle adjustment amount includes:
and obtaining the pressure difference between the positive bus and the negative bus of the bus balance bridge.
And inputting the differential pressure into a preset controller to obtain a first duty ratio adjustment amount.
In this embodiment, the controller may be a proportional controller or a proportional-integral controller, which is not limited herein.
In summary, in the above embodiment, in the range where the regulation effect is not obvious, the first duty cycle adjustment amount is corrected by the larger correction parameter, and in the range where the regulation effect is better, the first duty cycle adjustment amount is corrected by the smaller correction parameter, so that the overall regulation effect can be improved, and the over-control can be avoided, thereby effectively solving the problems in the prior art.
In another aspect of the present invention, there is also provided a bus bar balance bridge control apparatus 300, including: one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The processor 301, the input device 302, the output device 303, and the memory 304 communicate with each other via a communication bus 305. The memory 304 is used to store a computer program comprising program instructions. The processor 301 is configured to execute program instructions stored in the memory 304. Wherein the processor 301 is configured to invoke program instructions to perform the steps of the method embodiments described above. It should be appreciated that in embodiments of the present invention, the processor 301 may be a central processing unit (CentralProcessingUnit, CPU). The processor may also be other general purpose processors, digital signal processors (DigitalSignalProcessor, DSP), application specific integrated circuits (ApplicationSpecificIntegratedCircuit, ASIC), off-the-shelf programmable gate arrays (Field-ProgrammableGateArray, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The input device 302 may include a touch pad, a fingerprint sensor (for collecting fingerprint information of a user and direction information of a fingerprint), a microphone, etc., and the output device 303 may include a display (LCD, etc.), a speaker, etc. The memory 304 may include read only memory and random access memory and provides instructions and data to the processor 301. A portion of memory 304 may also include non-volatile random access memory. For example, the memory 304 may also store information of device type. In a specific implementation, the processor 301, the input device 302, and the output device 303 described in the embodiments of the present invention may execute the implementation described in the first embodiment and the second embodiment of the bus balance bridge control method provided in the embodiments of the present invention.
In still another aspect of the present invention, there is also provided a power supply system including:
the balance bridge control device above.
The present invention is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and these modifications and substitutions are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. The bus balance bridge control method is characterized by comprising the following steps of:
acquiring a first duty ratio adjustment amount; the first duty ratio adjustment amount is a duty ratio adjustment amount which is calculated in advance and used for carrying out voltage equalizing control on the bus balance bridge;
determining a correction parameter corresponding to the first duty cycle adjustment amount according to a preset duty cycle range to which the first duty cycle adjustment amount belongs; wherein, each preset duty ratio range corresponds to a correction parameter, and the closer a certain preset duty ratio range is to the optimal regulation range corresponding to the bus balance bridge, the smaller the corresponding correction parameter is;
correcting the first duty ratio adjustment amount based on the correction parameter to obtain a second duty ratio adjustment amount;
and controlling the bus balancing bridge based on the second duty ratio adjustment amount.
2. The bus bar balance bridge control method according to claim 1, characterized in that before determining the correction parameter corresponding to the first duty cycle adjustment amount according to the preset duty cycle range to which the first duty cycle adjustment amount belongs, the bus bar balance bridge control method further comprises: determining at least two preset duty cycle ranges;
the determining the at least two preset duty cycle ranges includes:
determining a variation range of a first duty ratio adjustment amount when the bus balance bridge is controlled;
dividing the variation range of the duty ratio adjustment quantity according to a preset step length to obtain at least two preset duty ratio ranges.
3. The bus bar balance bridge control method according to claim 1, wherein the correction parameter corresponding to each preset duty ratio range is selected within a preset correction parameter range, the bus bar balance bridge control method further comprising: determining a preset correction parameter range;
the determining the preset correction parameter range includes:
acquiring inductance corresponding to the bus balance bridge and switching frequency;
and determining a preset correction parameter range according to the inductance and the switching frequency.
4. The bus bar balance bridge control method according to claim 1, characterized in that before determining the correction parameter corresponding to the first duty cycle adjustment amount according to the preset duty cycle range to which the first duty cycle adjustment amount belongs, the bus bar balance bridge control method further comprises:
determining a correction parameter corresponding to each preset duty ratio range;
the determining the correction parameter corresponding to each preset duty cycle range comprises the following steps:
acquiring a preset correction parameter range, and determining a sampling interval according to the number of the preset duty ratio ranges and the endpoint value of the correction parameter range;
sampling the correction parameter range at the sampling interval to obtain at least two correction parameters;
and distributing each correction parameter according to the degree that each preset duty ratio range is close to the optimal regulation range, so as to obtain the correction parameter corresponding to each preset duty ratio range.
5. The bus bar balancing bridge control method according to claim 4, wherein the determining the sampling interval according to the number of the preset duty ratio ranges includes:
D S ＝|D max -D min |÷(n-1)
wherein D is S For sampling interval, D max 、D min And n is the number of preset duty ratio ranges for the two end values of the correction parameter range.
6. The bus bar balance bridge control method according to claim 1, wherein the correction parameter is a coefficient, and the correcting the first duty ratio adjustment amount based on the correction parameter to obtain a second duty ratio adjustment amount includes:
D new ＝D old ×ζ
wherein D is old For the first duty cycle adjustment amount, D new Zeta is the correction parameter for the second duty cycle adjustment amount.
7. The bus bar balance bridge control method according to claim 1, wherein the correction parameter is a compensation amount, the correcting the first duty ratio adjustment amount based on the correction parameter to obtain a second duty ratio adjustment amount includes:
D new ＝D old +ΔD
wherein D is old For the first duty cycle adjustment amount, D new For the second duty cycle adjustment amount, Δd is the correction parameter.
8. The bus bar balancing bridge control method according to any one of claims 1 to 7, characterized in that the bus bar balancing bridge control method further comprises: determining a first duty cycle adjustment;
the determining the first duty cycle adjustment amount includes:
acquiring the pressure difference between positive and negative buses of the bus balance bridge;
and inputting the differential pressure into a preset controller to obtain a first duty ratio adjustment amount.
9. A busbar balance bridge control device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 8 when the computer program is executed by the processor.
10. A power supply system, comprising:
the bus bar balancing bridge control apparatus according to claim 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116760042A (en) * | 2023-08-15 | 2023-09-15 | 锦浪科技股份有限公司 | Bus voltage balance control system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116760042A (en) * | 2023-08-15 | 2023-09-15 | 锦浪科技股份有限公司 | Bus voltage balance control system and method |
| CN116760042B (en) * | 2023-08-15 | 2023-11-03 | 锦浪科技股份有限公司 | Bus voltage balance control system and method |
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