CN113241958A - Control system and method for rectifier of electric vehicle charging pile - Google Patents

Control system and method for rectifier of electric vehicle charging pile Download PDF

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Publication number
CN113241958A
CN113241958A CN202110605533.2A CN202110605533A CN113241958A CN 113241958 A CN113241958 A CN 113241958A CN 202110605533 A CN202110605533 A CN 202110605533A CN 113241958 A CN113241958 A CN 113241958A
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China
Prior art keywords
rectifier
module
current
voltage
charging pile
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刘沛津
王郑凯
石梦涛
何林
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Priority to CN202110605533.2A priority Critical patent/CN113241958A/en
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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
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without 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
    • H02M7/217—Conversion of ac power input into dc power output without 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
    • H02M7/219—Conversion of ac power input into dc power output without 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 in a bridge configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • 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
    • 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
    • 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
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

Abstract

The invention discloses a control system and a control method for a charging pile rectifier of an electric automobile, wherein the control system comprises a direct current side voltage sensor, an alternating current side voltage sensor, a current sensor, an active disturbance rejection control module with a reduced order extended state observer, a PI controller, a coordinate transformation module, a nonlinear decoupling module and an SVPWM module; the AC side voltage sensor and the current sensor are both connected with the input end of the coordinate transformation module, and the coordinate transformation module and the DC side voltage sensor are connected with the active disturbance rejection control module together; the active disturbance rejection control module is connected with the PI controller, the PI controller is connected with the nonlinear decoupling module, the nonlinear decoupling module is connected with the SVPWM module, and the SVPWM module is connected with a rectifier bridge circuit in the rectifier. The order of the observer is effectively reduced by using the active disturbance rejection control module with the order-reduced extended state observer.

Description

Control system and method for rectifier of electric vehicle charging pile
Technical Field
The invention belongs to the field of rectifier control, and particularly relates to a rectifier control system and method for an electric vehicle charging pile.
Background
At present, electric automobile can be divided into an alternating current charging pile and a direct current charging pile according to the classification of charging facilities, wherein the alternating current charging pile is called slow charging, the direct current charging pile is called fast charging, compared with the alternating current charging, the direct current charging efficiency is higher, the speed is faster, and the electric automobile is the development direction of the future charging pile. Meanwhile, in order to meet the charging requirement of the electric automobile, stable direct-current side voltage and alternating-current side current with high sine degree need to be provided, and even under the influence of uncertain charging load and strong external interference, the output voltage of the direct-current side can be quickly adjusted according to requirements, so that high-quality charging voltage is provided.
The control method of the charging pile rectifier is multiple, wherein the PI control of a double closed loop is widely applied, but the control method cannot improve the response speed and reduce the overshoot, and the anti-interference performance is poor; therefore, the performance of the rectifier can be optimized by using the active disturbance rejection control, the disturbance is estimated and compensated by using the extended state observer, the transition process is processed by using the tracking differentiator, the final input of the controlled object is obtained by using the nonlinear state error control law, and the disturbance rejection capability of the nonlinear system can be effectively improved.
Disclosure of Invention
The invention aims to provide a control system and a control method for a charging pile rectifier of an electric automobile, which aim to solve the problem that the operation process is quite complex when a controlled object is a high-order model due to the nonlinear characteristic of active disturbance rejection control.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control system of a charging pile rectifier of an electric automobile comprises a direct current side voltage sensor, an alternating current side current sensor, an active disturbance rejection control module with a reduced order expansion state observer, a PI controller, a coordinate transformation module, a nonlinear decoupling module and an SVPWM module;
the direct current side voltage sensor is arranged on the direct current side of the rectifier, and the alternating current side voltage sensor and the alternating current side current sensor are both arranged on the alternating current side of the rectifier;
the AC side voltage sensor and the AC side current sensor are both connected with the input end of the coordinate transformation module, and the output end of the coordinate transformation module and the DC side voltage sensor are jointly connected with the signal input end of the active disturbance rejection control module with the reduced order extended state observer;
the signal output end of the active disturbance rejection control module with the reduced order extended state observer is connected with the signal input end of the PI controller, the signal output end of the PI controller is connected with the signal input end of the nonlinear decoupling module, the signal output end of the nonlinear decoupling module is connected with the signal input end of the SVPWM module, and the signal output end of the SVPWM module is connected with a rectifier bridge circuit in the rectifier.
Further, the rectifier is a three-phase voltage type PWM rectifier.
Furthermore, the rectifier comprises a charging pile power supply input port, an input line equivalent inductor L, an input line equivalent resistor R, a rectifying bridge circuit and a charging pile rectifier direct-current side output port which are sequentially connected.
Further, the dc side voltage sensor is configured to collect a voltage on the dc side of the rectifier.
Further, the alternating current side voltage sensor is used for acquiring voltage at the alternating current side of the rectifier, and the alternating current side current sensor is used for acquiring current at the alternating current side of the rectifier.
Further, the rectifier bridge circuit includes three sets of valve arms, each set of valve arms including two switching elements.
Furthermore, one end of the input line equivalent resistor R is connected with the input line equivalent inductor L, and the other end of the input line equivalent resistor R is connected between the valve arms.
The invention provides another technical scheme that:
a control method of an electric automobile charging pile rectifier is based on an electric automobile charging pile rectifier control system and comprises the following steps:
collecting three-phase voltages Ua, Ub and Uc at the AC side of the rectifier, three-phase currents Ia, Ib and Ic at the AC side of the rectifier and actual voltage Vdc at the DC side of the rectifier;
converting the Ua, Ub, Uc, Ia, Ib and Ic from a three-phase static abc coordinate system through clark conversion and park conversion into an equation under a two-phase rotating dq coordinate system to obtain voltage components ud and uq under a d axis and a q axis and current components id and iq under the d axis and the q axis;
setting an expected value Vdc of the direct current side voltage of the rectifier, and feeding the difference between the expected value Vdc and the collected actual voltage value Vdc of the direct current side of the rectifier into an active disturbance rejection control module with a reduced order extended state observer of a voltage outer ring; obtaining a given value id of d-axis current input;
the active current id is differed from a given value id and then is sent to a PI controller of a current inner ring; setting a reactive current expected value iq as 0, and sending the reactive current iq and the iq into a PI controller of a current inner ring after difference is made;
combining the output value of a PI controller of the current inner loop with actual voltage current values ud, uq, id and iq under a dq coordinate system to perform nonlinear decoupling to obtain voltage values vd and vq under a decoupled dq axis, performing coordinate transformation on the voltage values vd and vq to obtain a voltage value under an alpha beta coordinate system, and performing SVPWM modulation to output a PWM control signal to control the on-off of a switching tube in a rectifier.
The invention has the following beneficial effects:
according to the control system and method for the electric vehicle charging pile rectifier, the order of the observer can be effectively reduced by using the active disturbance rejection control module with the order-reduced extended state observer, so that the control system is higher in anti-interference capability and better in tracking performance under the same bandwidth.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a topology structure diagram of a three-phase voltage-type PWM rectifier according to an embodiment of the present invention.
Fig. 2 is a connection diagram of a rectifier control system of an electric vehicle charging pile according to an embodiment of the invention.
Fig. 3 is a graph showing experimental effects of the load sudden increase under PI control and under the electric vehicle charging pile rectifier control system in the embodiment of the present invention. (a) The control is double PI control; (b) to improve active disturbance rejection control.
Fig. 4 is a graph showing experimental effects of load sudden decrease under PI control and under an electric vehicle charging pile rectifier control system according to an embodiment of the present invention. (a) The control is double PI control; (b) to improve active disturbance rejection control.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
As shown in fig. 2, an embodiment of the present invention provides a control system for a charging pile rectifier of an electric vehicle, which is suitable for a three-phase voltage type PWM rectifier. The control system of the electric automobile charging pile rectifier comprises a direct current side voltage sensor, an alternating current side current sensor, an active disturbance rejection control module with a reduced order extended state observer of a voltage outer ring, a PI controller, a coordinate transformation module, a nonlinear decoupling module of a current inner ring and an SVPWM module; wherein the design of the voltage outer loop can effectively reduce the order of the observer.
The direct current side voltage sensor is arranged on the direct current side of the rectifier, the alternating current side voltage sensor and the alternating current side current sensor are both arranged on the alternating current side of the rectifier, the direct current side voltage sensor is used for collecting voltage Udc on the direct current side of the rectifier, the alternating current side voltage sensor is used for collecting voltages Ua, Ub and Uc on the alternating current side of the rectifier, and the alternating current side current sensor is used for collecting currents Ia, Ib and Ic on the alternating current side of the rectifier;
the AC side voltage sensor and the AC side current sensor are both connected with the input end of the coordinate transformation module, and the output end of the coordinate transformation module and the DC side voltage sensor are jointly connected with the signal input end of the active disturbance rejection control module of the reduced order extended state observer;
the signal output end of an active disturbance rejection control module with the order reduction expansion state observer is connected with the signal input end of a PI controller, the signal output end of the PI controller is connected with the signal input end of a nonlinear decoupling module, the signal output end of the nonlinear decoupling module is connected with the signal input end of an SVPWM module, and the signal output end of the SVPWM module is connected with a rectifier bridge circuit in a rectifier.
As shown in fig. 1, in this embodiment, the rectifier includes a charging pile power input port, an input line equivalent inductor L, an input line equivalent resistor R, a rectifier bridge circuit, and a charging pile rectifier dc side output port, which are connected in sequence. The rectifier bridge circuit comprises three sets of valve arms, each set of valve arms comprising two switching elements. One end of the input line equivalent resistor R is connected with the input line equivalent inductor L, and the other end of the input line equivalent resistor R is connected between the valve arms.
The working method of the electric vehicle charging pile rectifier control system provided by the embodiment of the invention comprises the following steps:
step 1, collecting three-phase voltages Ua, Ub and Uc at an alternating current side of a rectifier, three-phase currents Ia, Ib and Ic at the alternating current side and actual voltage Vdc at a direct current side;
and 2, converting the Ua, Ub, Uc, Ia, Ib and Ic from a three-phase static abc coordinate system into an equation under a two-phase rotating dq coordinate system after clark conversion and park conversion, and obtaining voltage components ud and uq under d and q axes and current components id and iq under the d and q axes.
Step 3, setting as requiredThe expected value of the voltage on the direct current side of the rectifier is Vdc, the expected value Vdc and the collected actual voltage value Vdc are subjected to difference and then are sent into an active disturbance rejection control module with a reduced order extended state observer of a voltage outer ring, the state observer is arranged in the active disturbance rejection control module to estimate and compensate the disturbance of a load, and the transfer function of the voltage outer ring is
Figure BDA0003093974300000051
And expressed as a state space expression
Figure BDA0003093974300000061
C is a DC side voltage stabilizing capacitor, and R isL(load) and m (modulation ratio) are regarded as disturbance terms of the active disturbance rejection controller, and meanwhile, in order to ensure the stability of the system under unknown disturbance, a control input gain b is introduced0Definition of
Figure BDA0003093974300000062
As coefficients of a state space expression. Expanding the disturbance term f to a new state variable x2Can be represented as x2At this time, the system is a second-order system, the calculation process is quite complicated, the parameter adjustment is difficult, and the phase lag is large, so that the order is reduced, the calculation process is simplified, and the disturbance resistance is improved. Reduced in rank to obtain
Figure BDA0003093974300000063
In the formula z1Is a state variable of the extended state observer; z is a radical of2Is an observed value; omegaoIs the bandwidth of the state observer. At the moment, the calculation of a first-order system is simple, the control effect is further improved, the given value id of the d-axis current input is obtained through the control of the voltage outer ring, the value indicates the transmission power, and the symbol indicates the power flow direction of the rectifier.
Step 4, each axis component id and iq in the dq coordinate system are direct current quantities and can be respectively controlled, wherein id is active current, and the difference between id and id is sent to a PI controller of a current inner ring; and iq is reactive current, a reactive current expected value iq is set to be 0, and the difference between iq and iq is sent to a PI controller of the current inner loop.
And 5, combining the output value of the current inner loop PI controller with actual voltage current values ud, uq, id and iq in a dq coordinate system to perform nonlinear decoupling to obtain voltage values vd and vq in a decoupled dq axis, performing coordinate transformation to obtain a voltage value in an alpha beta coordinate system, performing SVPWM to modulate and output a PWM control signal, and controlling the on-off of a main circuit switching tube, thereby achieving the purpose of rectification.
The verification is carried out according to the traditional PI control and the control system of the invention to obtain the direct current side voltage and the alternating current side current, and the comparison of the graphs shown in figures 3 and 4 shows that the voltage and current obtained by the control system of the invention has better effect.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims (8)

1. A rectifier control system of an electric vehicle charging pile is characterized by comprising a direct current side voltage sensor, an alternating current side current sensor, an active disturbance rejection control module with a reduced order extended state observer, a PI controller, a coordinate transformation module, a nonlinear decoupling module and an SVPWM module;
the direct current side voltage sensor is arranged on the direct current side of the rectifier, and the alternating current side voltage sensor and the alternating current side current sensor are both arranged on the alternating current side of the rectifier;
the AC side voltage sensor and the AC side current sensor are both connected with the input end of the coordinate transformation module, and the output end of the coordinate transformation module and the DC side voltage sensor are jointly connected with the signal input end of the active disturbance rejection control module with the reduced order extended state observer;
the signal output end of the active disturbance rejection control module with the reduced order extended state observer is connected with the signal input end of the PI controller, the signal output end of the PI controller is connected with the signal input end of the nonlinear decoupling module, the signal output end of the nonlinear decoupling module is connected with the signal input end of the SVPWM module, and the signal output end of the SVPWM module is connected with a rectifier bridge circuit in the rectifier.
2. The electric vehicle charging pile rectifier control system of claim 1, wherein the rectifier is a three-phase voltage type PWM rectifier.
3. The electric vehicle charging pile rectifier control system according to claim 2, wherein the rectifier comprises a charging pile power supply input port, an input line equivalent inductance L, an input line equivalent resistance R, a rectifying bridge circuit and a charging pile rectifier direct current side output port which are connected in sequence.
4. The electric vehicle charging pile rectifier control system of claim 1, wherein the DC side voltage sensor is configured to collect a voltage on a DC side of the rectifier.
5. The electric vehicle charging pile rectifier control system of claim 1, wherein the AC side voltage sensor is used for acquiring voltage on an AC side of the rectifier, and the AC side current sensor is used for acquiring current on the AC side of the rectifier.
6. The electric vehicle charging post rectifier control system of claim 3, wherein the rectifier bridge circuit includes three sets of valve arms, each set of valve arms including two switching elements.
7. The electric vehicle charging pile rectifier control system of claim 6, wherein the input line equivalent resistor R is connected with the input line equivalent inductor L at one end and connected between a set of valve arms at the other end.
8. An electric vehicle charging pile rectifier control method based on the electric vehicle charging pile rectifier control system of claim 1 is characterized by comprising the following steps:
collecting three-phase voltages Ua, Ub and Uc at the AC side of the rectifier, three-phase currents Ia, Ib and Ic at the AC side of the rectifier and actual voltage Vdc at the DC side of the rectifier;
converting the Ua, Ub, Uc, Ia, Ib and Ic from a three-phase static abc coordinate system through clark conversion and park conversion into an equation under a two-phase rotating dq coordinate system to obtain voltage components ud and uq under a d axis and a q axis and current components id and iq under the d axis and the q axis;
setting an expected value Vdc of the direct current side voltage of the rectifier, and feeding the difference between the expected value Vdc and the collected actual voltage value Vdc of the direct current side of the rectifier into an active disturbance rejection control module with a reduced order extended state observer of a voltage outer ring; obtaining a given value id of d-axis current input;
the active current id is differed from a given value id and then is sent to a PI controller of a current inner ring; setting a reactive current expected value iq as 0, and sending the reactive current iq and the iq into a PI controller of a current inner ring after difference is made;
combining the output value of a PI controller of the current inner loop with actual voltage current values ud, uq, id and iq under a dq coordinate system to perform nonlinear decoupling to obtain voltage values vd and vq under a decoupled dq axis, performing coordinate transformation on the voltage values vd and vq to obtain a voltage value under an alpha beta coordinate system, and performing SVPWM modulation to output a PWM control signal to control the on-off of a switching tube in a rectifier.
CN202110605533.2A 2021-05-31 2021-05-31 Control system and method for rectifier of electric vehicle charging pile Pending CN113241958A (en)

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Publication number Priority date Publication date Assignee Title
CN116614019A (en) * 2023-06-07 2023-08-18 广东电网有限责任公司广州供电局 Bandwidth improving method under direct-current voltage stabilizing framework of bidirectional charging pile virtual synchronous machine
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Application publication date: 20210810