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Control method for front-stage rectifiers of electric vehicle charging piles

An electric vehicle and rectifier technology, applied in electric vehicle charging technology, electric vehicles, charging stations, etc., can solve the problems of poor tracking accuracy, poor harmonic suppression effect, easy overshoot, etc., to simplify calculation, enhance stability, The effect of improving the response speed

Active Publication Date: 2019-11-19
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Regarding the control strategy of the rectifier, the traditional PI control has a better suppression effect on the fundamental wave disturbance, but it is easy to overshoot, and the harmonic suppression effect is relatively poor, and the tracking accuracy is poor.

Method used

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  • Control method for front-stage rectifiers of electric vehicle charging piles
  • Control method for front-stage rectifiers of electric vehicle charging piles
  • Control method for front-stage rectifiers of electric vehicle charging piles

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0026] see figure 2 , the PI-backstepping composit...

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Abstract

The invention relates to a PI-backstepping composite control method for the front-stage rectifiers of electric vehicle charging piles. The method includes the following steps: step 3, setting a directcurrent side voltage desired value U<dc><*>, and generating d-axis current virtual control quantity i<d><*> according to the U<dc><*> and U<dc>; step 4, calculating d-axis voltage actual control quantity V<d> according to the d-axis current virtual control quantity i<d><*>, i<d>, i<q> and U<d>; step 5, setting q-axis virtual control quantity i<q><*>, and calculating q-axis voltage actual controlquantity V<q> according to the i<q><*>, the i<d>, the i<q> and the U<d>; and step 6, generating an SVPWM modulation signal by the V<d>, the V<q> and theta, and performing control on a VIENNA rectifier. Through the setting of the direct current side voltage desired value, the actual control quantity can be calculated through a PI-backstepping composite control mode, and control can be performed through the actual control quantity, so that the stability of a system can be enhanced.

Description

technical field [0001] The present invention relates to the technical field of a front-stage rectifier of an electric vehicle charging pile, in particular to a PI-reversing composite control method for a front-stage rectifier of an electric vehicle charging pile. Background technique [0002] The electric vehicle charging pile is mainly composed of a front-stage rectifier circuit and a post-stage DCDC step-down circuit, such as figure 1 As shown, the front stage rectifier circuit outputs DC voltage under the action of vector control, which is supplied to the rear stage DCDC circuit to realize the charging and discharging of the electric vehicle battery. The pre-stage rectifier circuit is mainly composed of a controllable power switching device (IGBT) and a power diode. A bidirectional switch is connected to the three-phase input terminals a, b, and c and the midpoint of the DC bus capacitor to form a three-level structure, and the bidirectional switch form It consists of tw...

Claims

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Application Information

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IPC IPC(8): H02J7/02H02M7/217H02M7/219B60L53/31
CPCB60L53/31H02J7/02H02M7/2173H02M7/219Y02T10/70Y02T10/7072Y02T10/72Y02T90/12
Inventor 王君瑞贾思宁王闯向上单祥虎恩典李学生
Owner BEIFANG UNIV OF NATITIES
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