CN116845949A - AC-DC bidirectional converter and DC side voltage stabilization control method, device and equipment - Google Patents
AC-DC bidirectional converter and DC side voltage stabilization control method, device and equipment Download PDFInfo
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- CN116845949A CN116845949A CN202310777865.8A CN202310777865A CN116845949A CN 116845949 A CN116845949 A CN 116845949A CN 202310777865 A CN202310777865 A CN 202310777865A CN 116845949 A CN116845949 A CN 116845949A
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 69
- 230000006641 stabilisation Effects 0.000 title abstract description 5
- 238000011105 stabilization Methods 0.000 title abstract description 5
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 73
- 238000012545 processing Methods 0.000 claims description 25
- 238000004364 calculation method Methods 0.000 claims description 17
- 238000005070 sampling Methods 0.000 claims description 16
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 abstract description 9
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 9
- 230000001052 transient effect Effects 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- H02J3/36—Arrangements for transfer of electric power between AC networks via a high-tension DC link
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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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
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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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
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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
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/66—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal
- H02M7/68—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters
- H02M7/72—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/797—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
本申请涉及一种交直流双向变换器及其直流侧稳压控制方法、装置和设备，该方法包括实时获取交直流双向变换器的控制参数；采用模拟除法元件处理实时电流数据得到实时电流控制信号；根据实时电压数据与直流电压目标值计算得到实时电压控制信号；采用PI控制器处理实时电流控制信号和实时电压控制信号得到实时稳压控制信号；根据实时稳压控制信号与功率传输信号计算得到调制信号；根据调制信号与载波信号进行比较得到驱动信号。该方法通过生成的驱动信号控制该交直流双向变换器的运行，使得该交直流双向变换器输出电压避免了暂态超调峰值高和稳态追踪精度低的困境，也充分发挥该交直流双向变换器中碳化硅开关管器件工作频率高的优势。
This application relates to an AC-DC bidirectional converter and its DC side voltage stabilization control method, device and equipment. The method includes obtaining the control parameters of the AC-DC bidirectional converter in real time; using an analog division element to process the real-time current data to obtain a real-time current control signal ; Calculate the real-time voltage control signal based on real-time voltage data and DC voltage target value; use PI controller to process the real-time current control signal and real-time voltage control signal to obtain the real-time voltage stabilization control signal; calculate based on the real-time voltage stabilization control signal and power transmission signal Modulation signal; the driving signal is obtained by comparing the modulation signal with the carrier signal. This method controls the operation of the AC-DC bidirectional converter through the generated driving signal, so that the output voltage of the AC-DC bidirectional converter avoids the dilemma of high transient overshoot peak value and low steady-state tracking accuracy, and also gives full play to the AC-DC bidirectional converter. Silicon carbide switching devices in converters have the advantage of high operating frequency.
Description
Technical Field
The present application relates to the field of power transmission engineering technologies, and in particular, to an ac-dc bidirectional converter, and a dc-side voltage stabilizing control method, apparatus, and device thereof.
Background
With the increase of various novel direct current loads, distributed new energy sources and distributed energy storage equipment, the demands on medium and low voltage direct current power distribution technologies are increasingly highlighted. The AC/DC bidirectional power transmission system is an interface unit necessary for a DC power system, and comprises silicon carbide power electronic devices.
Silicon carbide has the advantages of low loss, high switching speed, high power density and the like due to the high dielectric breakdown field strength, the high electron saturation speed, the high energy band gap and the high thermal conductivity of the silicon carbide. Most of the DC side voltage stabilizing control methods of the existing DC power systems depend on the voltage and current characteristics of a power frequency 50Hz AC system, and when the DC power system is disturbed, the DC side voltage stabilizing requirements cannot be responded quickly; particularly, when the power transmission direction of the direct current power system changes, the existing direct current side voltage stabilizing control method often has a larger overshoot phenomenon and a longer oscillation transient process. In order to inhibit transient overshoot, the existing direct-current side voltage stabilizing control method often needs to sacrifice a certain steady-state direct-current voltage tracking precision. The double factors restrict the exertion of the excellent characteristics of the novel power electronic device based on silicon carbide, and increase the design difficulty and cost of peripheral filter equipment.
Disclosure of Invention
The embodiment of the application provides an alternating current-direct current bidirectional converter, a direct current side voltage stabilizing control method, a direct current side voltage stabilizing control device and direct current side voltage stabilizing control equipment thereof, which are used for solving the technical problems of high transient overshoot peak value and low steady tracking precision of the direct current side voltage stabilizing control method of the existing direct current transmission system.
In order to achieve the above object, the embodiment of the present application provides the following technical solutions:
in one aspect, a method for controlling voltage stabilization on a dc side of an ac-dc bidirectional converter is provided, including the following steps:
acquiring control parameters of the AC-DC bidirectional converter in real time, wherein the control parameters comprise real-time current data of an AC side, real-time voltage data of a DC side, a power transmission signal and a carrier signal;
processing the real-time current data by adopting an analog division element to obtain a real-time current control signal; calculating according to the real-time voltage data and the direct-current voltage target value to obtain a real-time voltage control signal;
the PI controller is adopted to process the real-time current control signal and the real-time voltage control signal to obtain a real-time voltage stabilizing control signal; calculating according to the real-time voltage stabilizing control signal and the power transmission signal to obtain a modulation signal;
and comparing the modulating signal with the carrier signal to obtain a driving signal for driving a switching tube in the AC-DC bidirectional converter to operate.
Preferably, comparing the modulated signal with the carrier signal to obtain a driving signal for driving a switching tube in the ac-dc bidirectional converter includes:
if the waveform amplitude of the modulating signal of each phase of the AC-DC bidirectional converter is larger than that of the carrier signal, obtaining a high-level driving signal;
and if the waveform amplitude of the modulating signal of each phase of the AC-DC bidirectional converter is smaller than that of the carrier signal, obtaining a low-level driving signal.
Preferably, the switching tube of each phase of the ac-dc bidirectional converter includes an upper switching tube and a lower switching tube, and before comparing the modulating signal with the carrier signal, the dc-side voltage stabilizing control method includes:
normalizing the modulation signal to obtain a normalized modulation signal, and taking the normalized modulation signal as the modulation signal of the upper switching tube;
and carrying out inverse processing on the normalized modulation signal to obtain an inverse modulation signal, and taking the inverse modulation signal as the modulation signal of the lower switching tube.
Preferably, the dc side voltage stabilizing control method of the ac-dc bidirectional converter includes: and according to the real-time voltage stabilizing control signal and the power transmission signal, proportional addition calculation is carried out to obtain a modulation signal.
Preferably, the dc side voltage stabilizing control method of the ac-dc bidirectional converter includes: and performing difference calculation according to the real-time voltage data and the direct-current voltage target value to obtain a real-time voltage control signal.
On the other hand, the alternating current-direct current bidirectional converter comprises a three-phase exchange module, a voltage sampling module connected with the three-phase exchange module in parallel and a control module for controlling the three-phase exchange module to operate, wherein each phase of exchange module comprises a current sampling module, a filter element connected with the current sampling module and a switching tube connected with the filter element, each switching tube comprises an upper switching tube and a lower switching tube, and the control module controls the switching tube to operate according to the direct current side voltage stabilizing control method of the alternating current-direct current bidirectional converter.
Preferably, the control module includes at least three analog division components, at least one processor and at least one memory, the memory is used for storing at least one program, and the processor is used for executing the direct current side voltage stabilizing control method of the alternating current-direct current bidirectional converter according to the program.
In still another aspect, a dc-side voltage stabilizing control device of an ac-dc bidirectional converter is provided, including a data acquisition module, a first calculation module, a second calculation module, and a comparison processing module;
the data acquisition module is used for acquiring control parameters of the alternating current-direct current converter in real time, wherein the control parameters comprise real-time current data of an alternating current side, real-time voltage data of a direct current side, a power transmission signal and a carrier signal;
the first calculation module is used for processing the real-time current data by adopting an analog division element to obtain a real-time current control signal; calculating according to the real-time voltage data and the direct-current voltage target value to obtain a real-time voltage control signal;
the second calculation module is used for processing the real-time current control signal and the real-time voltage control signal by adopting a PI controller to obtain a real-time voltage stabilizing control signal; calculating according to the real-time voltage stabilizing control signal and the power transmission signal to obtain a modulation signal;
and the comparison processing module is used for comparing the modulating signal with the carrier signal to obtain a driving signal for driving a switching tube in the AC/DC bidirectional converter to operate.
Preferably, the comparison processing module is further configured to obtain a high-level driving signal according to that the waveform amplitude of the modulating signal of each phase of the ac-dc bidirectional converter is greater than the waveform amplitude of the carrier signal; or according to the fact that the waveform amplitude of the modulating signal of each phase of the alternating current-direct current bidirectional converter is smaller than that of the carrier signal, a low-level driving signal is obtained.
In yet another aspect, a terminal device is provided that includes a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the dc-side voltage stabilizing control method of the ac-dc bidirectional converter according to the instruction in the program code.
From the above technical solutions, the embodiment of the present application has the following advantages: the method comprises the steps of obtaining control parameters of the AC-DC bidirectional converter in real time; processing the real-time current data by adopting an analog division element to obtain a real-time current control signal; calculating according to the real-time voltage data and the direct-current voltage target value to obtain a real-time voltage control signal; a PI controller is adopted to process the real-time current control signal and the real-time voltage control signal, and a real-time voltage stabilizing control signal is obtained; calculating according to the real-time voltage stabilizing control signal and the power transmission signal to obtain a modulation signal; and comparing the modulating signal with the carrier signal to obtain a driving signal for driving a switching tube in the AC-DC bidirectional converter to operate. The DC side voltage stabilizing control method of the AC-DC bidirectional converter controls the operation of the AC-DC bidirectional converter through the generated driving signal, so that the output voltage of the AC-DC bidirectional converter avoids the dilemma of high transient overshoot peak value and low steady tracking precision, the advantage of high working frequency of a silicon carbide switching tube device in the AC-DC bidirectional converter is fully exerted, and the technical problems of high transient overshoot peak value and low steady tracking precision existing in the DC side voltage stabilizing control method of the existing DC power transmission system are solved.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a flow chart of the steps of a dc-side voltage stabilizing control method of an ac-dc bidirectional converter according to an embodiment of the present application;
fig. 2 is an electrical schematic diagram of an ac-dc bidirectional converter in a dc-side voltage stabilizing control method of the ac-dc bidirectional converter according to an embodiment of the present application;
fig. 3 is a schematic diagram illustrating the operation of a switching tube of the ac-dc bi-directional converter in the dc-side voltage stabilizing control method of the ac-dc bi-directional converter according to the embodiment of the present application;
fig. 4 is a schematic diagram of a control module of an ac-dc bidirectional converter in a dc-side voltage stabilizing control method of the ac-dc bidirectional converter according to an embodiment of the present application;
fig. 5 is a block diagram of a dc-side voltage stabilizing control device of an ac-dc bidirectional converter according to an embodiment of the present application.
Detailed Description
In order to make the objects, features and advantages of the present application more comprehensible, the technical solutions in the embodiments of the present application are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application provides an alternating current-direct current bidirectional converter, a direct current side voltage stabilizing control method, a direct current side voltage stabilizing control device and direct current side voltage stabilizing control equipment thereof, which are used for solving the technical problems of high transient overshoot peak value and low steady tracking precision of the direct current side voltage stabilizing control method of the existing direct current transmission system.
Embodiment one:
fig. 1 is a flow chart of steps of a dc-side voltage stabilizing control method of an ac-dc bidirectional converter according to an embodiment of the present application, fig. 2 is an electrical schematic diagram of an ac-dc bidirectional converter in the dc-side voltage stabilizing control method of an ac-dc bidirectional converter according to an embodiment of the present application, fig. 3 is a schematic diagram of a switching tube of the ac-dc bidirectional converter in the dc-side voltage stabilizing control method of an ac-dc bidirectional converter according to an embodiment of the present application, and fig. 4 is a schematic diagram of a control module of the ac-dc bidirectional converter in the dc-side voltage stabilizing control method of an ac-dc bidirectional converter according to an embodiment of the present application.
The embodiment of the application provides a direct-current side voltage stabilizing control method of an alternating-current and direct-current bidirectional converter, which is applied to the alternating-current and direct-current bidirectional converter.
As shown in fig. 2 to fig. 4, in the embodiment of the present application, the ac-dc bidirectional converter includes a three-phase switching module, a voltage sampling module a connected in parallel with the three-phase switching module, and a control module for controlling the operation of the three-phase switching module, where each switching module includes a current sampling module a, a filter element L connected with the current sampling module a, and a switching tube connected with the filter element L, and the switching tube includes an upper switching tube and a lower switching tube, and the control module controls the operation of the switching tube according to the dc-side voltage stabilizing control method of the ac-dc bidirectional converter described above.
It should be noted that, the current sampling module a may be an ac current transformer, the filter element L may be a filter inductor, the voltage sampling module V may be a dc voltage detector, and the switching tube may be a transistor or an IGBT tube of silicon carbide power. The current sampling module A is used for collecting real-time current data of the alternating side output by each alternating module through the filter element L. The voltage sampling module V is used for collecting real-time voltage data of the direct current side of each alternating module. As shown in fig. 2, current sampling modules of the three-phase switching module are respectively denoted as A1, A2 and A3, corresponding filter elements are respectively denoted as L1, L2 and L3, upper switching tubes of corresponding switching tubes are respectively denoted as T1, T3 and T5, and lower switching tubes of corresponding switching tubes are respectively denoted as T2, T4 and T6.
In the embodiment of the present application, as shown in fig. 4, the control module includes at least three analog division elements, at least one processor and at least one memory, where the memory is used to store at least one program, and the processor is used to execute the dc-side voltage stabilizing control method of the ac-dc bidirectional converter according to the program.
It should be noted that, as shown in fig. 3, the control module controls the switching tube to operate according to the dc side voltage stabilizing control method of the ac-dc bidirectional converter, the off state of each phase switching tube is that the lower switching tube of each phase switching tube is controlled to be turned on and the upper switching tube is controlled to be turned off, and the off state of each phase switching tube is that the upper switching tube of each phase switching tube is controlled to be turned on and the lower switching tube is controlled to be turned off. In this embodiment, the analog dividing element may be an analog divider of the AD534 model.
As shown in fig. 1, the dc side voltage stabilizing control method of the ac-dc bidirectional converter includes the following steps:
s1, acquiring control parameters of an alternating current-direct current bidirectional converter in real time, wherein the control parameters comprise real-time current data of an alternating current side, real-time voltage data of a direct current side, a power transmission signal and a carrier signal.
In step S1, the control parameters of the ac/dc bidirectional converter are obtained in real time. In this embodiment, the current sampling module may be used to obtain real-time current data of the ac side of the ac-dc bidirectional converter after passing through the filter element, and the voltage sampling module may be used to obtain real-time voltage data of the dc side of the ac-dc bidirectional converter. The ac-dc bi-directional converter is used in a dc power system, a power scheduling strategy of the dc power system prescribes a power transmission signal of the ac-dc bi-directional converter, and a carrier signal is generated by a constant frequency PWM controller of the dc power system. The real-time current data may be a current signal, and the real-time voltage data may be a voltage signal.
S2, processing real-time current data by adopting an analog division element to obtain a real-time current control signal; and calculating according to the real-time voltage data and the direct-current voltage target value to obtain a real-time voltage control signal.
In step S2, the real-time current data and the real-time voltage data obtained in step S1 are processed to obtain a real-time current control signal and a real-time voltage control signal. And processing the real-time current data by adopting an analog division element to obtain a real-time current control signal of the current reciprocal.
In the embodiment of the application, the direct current side voltage stabilizing control method of the alternating current-direct current bidirectional converter comprises the steps of calculating a difference between real-time voltage data and a direct current voltage target value to obtain a real-time voltage control signal. It can be understood that the real-time voltage data is subtracted from the direct-current voltage target value to obtain a difference value, and a signal corresponding to the difference value is used as a real-time voltage control signal.
The dc voltage target value may be set according to the requirement, and is not limited herein.
S3, a PI controller is adopted to process the real-time current control signal and the real-time voltage control signal, and a real-time voltage stabilizing control signal is obtained; and calculating according to the real-time voltage stabilizing control signal and the power transmission signal to obtain a modulation signal.
In step S3, the real-time current control signal and the real-time voltage control signal obtained in step S2 are input into the PI controller to perform multiplication and proportional-integral processing to obtain a real-time voltage-stabilizing control signal; and secondly, proportional addition calculation is carried out according to the real-time voltage stabilizing control signal and the power transmission signal to obtain a modulation signal.
S4, comparing the modulation signal with the carrier signal to obtain a driving signal for driving a switching tube in the AC-DC bidirectional converter to operate.
In step S4, a driving signal is generated according to the comparison between the modulated signal obtained in step S3 and the carrier signal obtained in step S1, where the driving signal is used to drive the switching tube of the ac-dc bidirectional converter to drive the output voltage of the ac-dc bidirectional converter.
The application provides a DC side voltage stabilizing control method of an AC-DC bidirectional converter, which comprises the steps of acquiring control parameters of the AC-DC bidirectional converter in real time; processing the real-time current data by adopting an analog division element to obtain a real-time current control signal; calculating according to the real-time voltage data and the direct-current voltage target value to obtain a real-time voltage control signal; a PI controller is adopted to process the real-time current control signal and the real-time voltage control signal, and a real-time voltage stabilizing control signal is obtained; calculating according to the real-time voltage stabilizing control signal and the power transmission signal to obtain a modulation signal; and comparing the modulating signal with the carrier signal to obtain a driving signal for driving a switching tube in the AC-DC bidirectional converter to operate. The DC side voltage stabilizing control method of the AC-DC bidirectional converter controls the operation of the AC-DC bidirectional converter through the generated driving signal, so that the output voltage of the AC-DC bidirectional converter avoids the dilemma of high transient overshoot peak value and low steady tracking precision, the advantage of high working frequency of a silicon carbide switching tube device in the AC-DC bidirectional converter is fully exerted, and the technical problems of high transient overshoot peak value and low steady tracking precision existing in the DC side voltage stabilizing control method of the existing DC power transmission system are solved.
In one embodiment of the present application, comparing a modulated signal with a carrier signal to obtain a driving signal for driving a switching tube in an ac-dc bi-directional converter includes:
if the waveform amplitude of each phase of modulation signal of the AC-DC bidirectional converter is larger than that of the carrier signal, obtaining a high-level driving signal;
and if the waveform amplitude of each phase of modulation signal of the AC-DC bidirectional converter is smaller than the waveform amplitude of the carrier signal, obtaining a low-level driving signal.
The waveform comparison is performed between the modulated signals of each phase of the ac/dc bidirectional switch and the carrier signal, and the comparison contents are: if the waveform amplitude of the modulated signal of each phase is larger than that of the carrier signal, generating a high-level driving signal; if the waveform amplitude of each phase of modulated signal is smaller than the waveform amplitude of carrier signal, then a low-level driving signal is generated. And controlling the operation of a switching tube of each phase of silicon carbide power according to the driving signals of each phase so as to drive the output voltage of the AC-DC bidirectional converter.
In one embodiment of the present application, the switching transistors of each phase of the ac-dc bidirectional converter include an upper switching transistor and a lower switching transistor, and the dc-side voltage stabilizing control method includes:
normalizing the modulation signal to obtain a normalized modulation signal, and taking the normalized modulation signal as the modulation signal of the upper switching tube;
and carrying out inverse processing on the normalized modulation signal to obtain an inverse modulation signal, and taking the inverse modulation signal as a modulation signal of the lower switching tube.
Embodiment two:
fig. 5 is a block diagram of a dc-side voltage stabilizing control device of an ac-dc bidirectional converter according to an embodiment of the present application.
As shown in fig. 5, an embodiment of the present application provides a dc-side voltage stabilizing control device of an ac-dc bidirectional converter, including: a data acquisition module 10, a first calculation module 20, a second calculation module 30, and a comparison processing module 40;
the data acquisition module 10 is configured to acquire control parameters of the ac-dc bidirectional converter in real time, where the control parameters include real-time current data of the ac side, real-time voltage data of the dc side, a power transmission signal and a carrier signal;
a first calculation module 20, configured to process the real-time current data by using an analog division element to obtain a real-time current control signal; calculating according to the real-time voltage data and the direct-current voltage target value to obtain a real-time voltage control signal;
the second calculation module 30 is configured to process the real-time current control signal and the real-time voltage control signal by using the PI controller to obtain a real-time voltage stabilizing control signal; calculating according to the real-time voltage stabilizing control signal and the power transmission signal to obtain a modulation signal;
and the comparison processing module 40 is used for comparing the modulation signal with the carrier signal to obtain a driving signal for driving the switching tube in the AC/DC bidirectional converter to operate.
In the embodiment of the present application, the comparison processing module 40 is further configured to obtain a high-level driving signal according to that the waveform amplitude of each phase of the modulated signal of the ac-dc bidirectional converter is greater than the waveform amplitude of the carrier signal; or according to the fact that the waveform amplitude of each phase of modulation signal of the AC/DC bidirectional converter is smaller than that of the carrier signal, a low-level driving signal is obtained.
It should be noted that, the module in the second device corresponds to the steps in the method in the first embodiment, the content of the dc-side voltage stabilizing control method of the ac-dc bidirectional converter has been described in detail in the first embodiment, and the content of the module in the second device will not be described in detail in the second embodiment.
Embodiment III:
the embodiment of the application provides terminal equipment, which comprises a processor and a memory;
a memory for storing program code and transmitting the program code to the processor;
and the processor is used for executing the direct current side voltage stabilizing control method of the alternating current-direct current bidirectional converter according to the instructions in the program codes.
It should be noted that the processor is configured to execute the steps in the embodiment of the dc-side voltage stabilizing control method of an ac-dc bidirectional converter according to the instructions in the program code. In the alternative, the processor, when executing the computer program, performs the functions of the modules/units in the system/apparatus embodiments described above.
For example, a computer program may be split into one or more modules/units, which are stored in a memory and executed by a processor to perform the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program in the terminal device.
The terminal device may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc. The terminal device may include, but is not limited to, a processor, a memory. It will be appreciated by those skilled in the art that the terminal device is not limited and may include more or less components than those illustrated, or may be combined with certain components, or different components, e.g., the terminal device may also include input and output devices, network access devices, buses, etc.
The processor may be a central processing unit (Central Processing Unit, CPU), other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, 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 memory may be an internal storage unit of the terminal device, such as a hard disk or a memory of the terminal device. The memory may also be an external storage device of the terminal device, such as a plug-in hard disk provided on the terminal device, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like. Further, the memory may also include both an internal storage unit of the terminal device and an external storage device. The memory is used for storing computer programs and other programs and data required by the terminal device. The memory may also be used to temporarily store data that has been output or is to be output.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The direct-current side voltage stabilizing control method of the alternating-current and direct-current bidirectional converter is characterized by comprising the following steps of:
acquiring control parameters of the AC-DC bidirectional converter in real time, wherein the control parameters comprise real-time current data of an AC side, real-time voltage data of a DC side, a power transmission signal and a carrier signal;
processing the real-time current data by adopting an analog division element to obtain a real-time current control signal; calculating according to the real-time voltage data and the direct-current voltage target value to obtain a real-time voltage control signal;
the PI controller is adopted to process the real-time current control signal and the real-time voltage control signal to obtain a real-time voltage stabilizing control signal; calculating according to the real-time voltage stabilizing control signal and the power transmission signal to obtain a modulation signal;
and comparing the modulating signal with the carrier signal to obtain a driving signal for driving a switching tube in the AC-DC bidirectional converter to operate.
2. The method for dc-side voltage regulation control of an ac-dc bi-directional converter according to claim 1, wherein comparing the modulated signal with the carrier signal to obtain a driving signal for driving a switching tube in the ac-dc bi-directional converter comprises:
if the waveform amplitude of the modulating signal of each phase of the AC-DC bidirectional converter is larger than that of the carrier signal, obtaining a high-level driving signal;
and if the waveform amplitude of the modulating signal of each phase of the AC-DC bidirectional converter is smaller than that of the carrier signal, obtaining a low-level driving signal.
3. The method for controlling the voltage stabilizing of the dc side of the ac-dc bi-directional converter according to claim 1, wherein the switching tubes of each phase of the ac-dc bi-directional converter include an upper switching tube and a lower switching tube, and the method for controlling the voltage stabilizing of the dc side before comparing the modulated signal with the carrier signal comprises:
normalizing the modulation signal to obtain a normalized modulation signal, and taking the normalized modulation signal as the modulation signal of the upper switching tube;
and carrying out inverse processing on the normalized modulation signal to obtain an inverse modulation signal, and taking the inverse modulation signal as the modulation signal of the lower switching tube.
4. The method for controlling the voltage regulation on the dc side of an ac/dc bi-directional converter according to claim 1, comprising: and according to the real-time voltage stabilizing control signal and the power transmission signal, proportional addition calculation is carried out to obtain a modulation signal.
5. The method for controlling the voltage regulation on the dc side of an ac/dc bi-directional converter according to claim 1, comprising: and performing difference calculation according to the real-time voltage data and the direct-current voltage target value to obtain a real-time voltage control signal.
6. An ac-dc bidirectional converter, comprising a three-phase switching module, a voltage sampling module connected in parallel with the three-phase switching module, and a control module for controlling the operation of the three-phase switching module, wherein each phase of switching module comprises a current sampling module, a filter element connected with the current sampling module, and a switching tube connected with the filter element, the switching tube comprises an upper switching tube and a lower switching tube, and the control module controls the switching tube to operate according to the dc-side voltage stabilizing control method of the ac-dc bidirectional converter as set forth in any one of claims 1-5.
7. An ac-dc bi-directional converter according to claim 6, wherein the control module comprises at least three analog division elements, at least one processor and at least one memory, the memory being configured to store at least one program, the processor being configured to perform the dc-side voltage regulation control method of the ac-dc bi-directional converter according to any one of claims 1-5 according to the program.
8. The DC side voltage stabilizing control device of the AC-DC bidirectional converter is characterized in that the DC side voltage stabilizing control device comprises: the device comprises a data acquisition module, a first calculation module, a second calculation module and a comparison processing module;
the data acquisition module is used for acquiring control parameters of the alternating current-direct current converter in real time, wherein the control parameters comprise real-time current data of an alternating current side, real-time voltage data of a direct current side, a power transmission signal and a carrier signal;
the first calculation module is used for processing the real-time current data by adopting an analog division element to obtain a real-time current control signal; calculating according to the real-time voltage data and the direct-current voltage target value to obtain a real-time voltage control signal;
the second calculation module is used for processing the real-time current control signal and the real-time voltage control signal by adopting a PI controller to obtain a real-time voltage stabilizing control signal; calculating according to the real-time voltage stabilizing control signal and the power transmission signal to obtain a modulation signal;
and the comparison processing module is used for comparing the modulating signal with the carrier signal to obtain a driving signal for driving a switching tube in the AC/DC bidirectional converter to operate.
9. The dc-side voltage stabilizing control device of the ac-dc bi-directional converter according to claim 8, wherein said comparing module is further configured to obtain a high-level driving signal according to the waveform amplitude of the modulated signal of each phase of the ac-dc bi-directional converter being greater than the waveform amplitude of the carrier signal; or according to the fact that the waveform amplitude of the modulating signal of each phase of the alternating current-direct current bidirectional converter is smaller than that of the carrier signal, a low-level driving signal is obtained.
10. A terminal device comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the dc-side voltage regulation control method of the ac-dc bidirectional converter according to any one of claims 1 to 5 according to instructions in the program code.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03135374A (en) * | 1989-10-18 | 1991-06-10 | Yaskawa Electric Mfg Co Ltd | Method of controlling pwm converter |
| CN1139308A (en) * | 1995-06-09 | 1997-01-01 | 三菱电机株式会社 | Rectifier control system |
| CN105897013A (en) * | 2016-05-13 | 2016-08-24 | 湖南大学 | Method for virtual inertia control of bidirectional AC/DC converter |
| CN108964476A (en) * | 2018-09-11 | 2018-12-07 | 太原理工大学 | The control method of isolation type bidirectional AC/DC converter based on double active bridges |
| US20190280609A1 (en) * | 2016-11-30 | 2019-09-12 | Huawei Technologies Co., Ltd. | Pulse width modulation method, pulse width modulation system, and controller |
| CN112072719A (en) * | 2020-08-12 | 2020-12-11 | 浙江大学 | Control method of isolated two-stage DC/AC converter with alternating current and direct current interconnected bidirectional support |
| CN112398349A (en) * | 2020-10-19 | 2021-02-23 | 浙江大学 | AC-DC interconnection isolated bidirectional DC/AC converter and its bidirectional sharing control method |
| CN112491288A (en) * | 2020-11-30 | 2021-03-12 | 河海大学 | Control circuit of three-phase Vienna rectifier under unbalanced midpoint potential and discontinuous pulse width modulation method |
| CN113098315A (en) * | 2021-04-01 | 2021-07-09 | 太原理工大学 | Virtual frequency-based bidirectional AC/DC converter control method |
| CN113949294A (en) * | 2021-10-12 | 2022-01-18 | 中国矿业大学 | Isolated AC/DC converter control method based on modulation signal compensation |
-
2023
- 2023-06-28 CN CN202310777865.8A patent/CN116845949A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03135374A (en) * | 1989-10-18 | 1991-06-10 | Yaskawa Electric Mfg Co Ltd | Method of controlling pwm converter |
| CN1139308A (en) * | 1995-06-09 | 1997-01-01 | 三菱电机株式会社 | Rectifier control system |
| CN105897013A (en) * | 2016-05-13 | 2016-08-24 | 湖南大学 | Method for virtual inertia control of bidirectional AC/DC converter |
| US20190280609A1 (en) * | 2016-11-30 | 2019-09-12 | Huawei Technologies Co., Ltd. | Pulse width modulation method, pulse width modulation system, and controller |
| CN108964476A (en) * | 2018-09-11 | 2018-12-07 | 太原理工大学 | The control method of isolation type bidirectional AC/DC converter based on double active bridges |
| CN112072719A (en) * | 2020-08-12 | 2020-12-11 | 浙江大学 | Control method of isolated two-stage DC/AC converter with alternating current and direct current interconnected bidirectional support |
| CN112398349A (en) * | 2020-10-19 | 2021-02-23 | 浙江大学 | AC-DC interconnection isolated bidirectional DC/AC converter and its bidirectional sharing control method |
| CN112491288A (en) * | 2020-11-30 | 2021-03-12 | 河海大学 | Control circuit of three-phase Vienna rectifier under unbalanced midpoint potential and discontinuous pulse width modulation method |
| CN113098315A (en) * | 2021-04-01 | 2021-07-09 | 太原理工大学 | Virtual frequency-based bidirectional AC/DC converter control method |
| CN113949294A (en) * | 2021-10-12 | 2022-01-18 | 中国矿业大学 | Isolated AC/DC converter control method based on modulation signal compensation |
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