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

A technology of electric vehicles and control systems, applied in electric vehicles, charging stations, electrical components, etc., can solve problems such as complex calculation processes, achieve good tracking performance, strong anti-interference ability, and reduce order effects

Pending Publication Date: 2021-08-10
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a control system and method for an electric vehicle charging pile rectifier to solve the problem that the above-mentioned non-linear characteristics of the active disturbance rejection control, when the controlled object is a high-order model, the calculation process is quite complicated

Method used

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  • Control system and method for rectifier of charging pile of electric vehicle
  • Control system and method for rectifier of charging pile of electric vehicle
  • Control system and method for rectifier of charging pile of electric vehicle

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Embodiment approach

[0032] Such as figure 2 As shown, the embodiment of the present invention provides a rectifier control system for an electric vehicle charging pile, which is suitable for a three-phase voltage type PWM rectifier. The electric vehicle charging pile rectifier control system includes a DC side voltage sensor, an AC side voltage sensor, an AC side current sensor, an active disturbance rejection control module with a reduced-order expanded state observer for the voltage outer loop, a PI controller, a coordinate transformation module, and a current The nonlinear decoupling module and SVPWM module of the inner loop; the design of the voltage outer loop can effectively reduce the order of the observer.

[0033] The DC side voltage sensor is installed on the DC side of the rectifier, the AC side voltage sensor and the AC side current sensor are both installed on the AC side of the rectifier, the DC side voltage sensor is used to collect the voltage Udc on the DC side of the rectifier,...

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Abstract

The invention discloses a control system and method for a rectifier of a charging pile of an electric vehicle. 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 expansion state observer, a PI controller, a coordinate transformation module, a nonlinear decoupling module and an SVPWM module, wherein the alternating-current-side voltage sensor and the current sensor are connected with the input end of the coordinate conversion module, and the coordinate conversion module and the direct-current-side voltage sensor are jointly connected with the active disturbance rejection control module; 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. According to the invention, by using the active disturbance rejection control module with the reduced-order expansion state observer, the order of the observer is effectively reduced.

Description

technical field [0001] The invention belongs to the field of rectifier control, and in particular relates to a control system and method for a rectifier of an electric vehicle charging pile. Background technique [0002] At present, electric vehicles can be divided into AC charging piles and DC charging piles according to the classification of charging facilities. Among them, AC charging piles are called "slow charging", and DC charging piles are called "fast charging". Compared with AC charging, DC charging Higher efficiency and faster speed are the development direction of charging piles in the future. At the same time, in order to meet the charging needs of electric vehicles, it is necessary to provide stable DC side voltage and high-sinusoidal AC side current. Even under the influence of uncertain charging load and strong external interference, the DC side can be quickly adjusted as required. output voltage to provide high quality charging voltage. [0003] There are m...

Claims

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Application Information

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IPC IPC(8): H02M7/219H02M1/44H02M1/00H02M1/088B60L53/31
CPCH02M7/219H02M1/44H02M1/00H02M1/088B60L53/31Y02T10/70Y02T10/72Y02T10/7072Y02T90/12
Inventor 刘沛津王郑凯石梦涛何林
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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