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Electric vehicle bidirectional charging discharging system design method

A technology for electric vehicle and system design, applied to general control systems, control/regulation systems, instruments, etc., to achieve the effects of reducing the total harmonic distortion rate of current, good harmonic suppression effect, and improved access ability

Inactive Publication Date: 2017-05-10
NAN TONG HUAWEI POWER EQUIP CO LTD
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  • Application Information

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Problems solved by technology

[0006] In order to overcome the problem of harmonics generated by charging and discharging of electric vehicles in the prior art, the present invention provides a design method for bidirectional charging and discharging systems of electric vehicles

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  • Electric vehicle bidirectional charging discharging system design method
  • Electric vehicle bidirectional charging discharging system design method
  • Electric vehicle bidirectional charging discharging system design method

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Embodiment Construction

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0043] This embodiment discloses a design method for a bidirectional charging and discharging system of an electric vehicle. The bidirectional charging and discharging design method includes the following specific steps:

[0044] S1, establish an electric vehicle charging and discharging model composed of grid-side power supply, PWM rectifier, DC-DC converter and battery; the PWM rectifier adopts a three-phase PWM rectifier;

[0045]S2, determine the value range of the main circuit parameters; the main circuit parameters include AC side inductance parameters and DC side capacitance parameters;

[0046] S3, set the control strategy of the three-phase PWM rectifier to analyze the harmonic ...

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Abstract

The invention provides an electric vehicle bidirectional charging discharging system design method. The electric vehicle bidirectional charging discharging system design method comprises steps that S1, an electric vehicle charging discharging model constituted by a line side power supply, a PWM rectifier, a DC-DC converter, and a storage battery is established; the PWM rectifier adopts a three-phase PWM rectifier; S2, a valuing range of a main circuit parameter is determined; the main circuit parameter comprises an AC side inductive parameter and a DC side capacitive parameter; S3, a three-phase PWM rectifier control strategy is set, and theoretical analysis of harmonic characteristics is carried out; S4, a simulation model is established, and the charging discharging system is analyzed, compared, and verified in a simulated way. The electric vehicle bidirectional charging discharging system design method is advantageous in that the three-phase PWM rectifier is used for rectification and inversion, and then network access requirements are satisfied by corresponding current and corresponding voltage without requiring harmonic suppression measures.

Description

technical field [0001] The invention relates to the technical field of bidirectional charging and discharging of electric vehicles, in particular to a design method for bidirectional charging and discharging of electric vehicles. Background technique [0002] The charger is the main equipment to realize the energy interaction between the electric vehicle and the grid, and is mainly composed of a rectifier, a DC-DC converter and a filter device. Because it involves the rectification link, there will be harmonics generated during the charging process of the charger, and the harmonics are more harmful to the public power grid, so corresponding suppression measures should be taken. [0003] Electric vehicles are powered by electric energy. When they are used as ordinary loads, they will increase the load on the grid. If a large number of electric vehicles have overlapping charging times, they will have a greater negative impact on the grid. If they are energy storage units, they...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 刘冰夏晨阳张加勇朱华林洪进
Owner NAN TONG HUAWEI POWER EQUIP CO LTD
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