Control method for electric car V2G converter

A technology of electric vehicles and converters, which is applied in the direction of electric vehicles, collectors, electrical components, etc., can solve the problems of inability to control the two-way transmission of reactive power, can not meet the two-way transmission of V2G converters and adjust the power factor, etc., to achieve the realization of electric The effect of isolation

Inactive Publication Date: 2018-10-16
STATE GRID CORP OF CHINA +1
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Problems solved by technology

That is, it can only control the two-way transmission of active power, but it cannot control the two-way transmission of reactive power. It only has the functions of reactive power compensation and power factor correction, and cannot meet the needs of four-quadrant operation of V2G converters, two-way transmission of reactive power and power regulation. factor demand

Method used

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  • Control method for electric car V2G converter
  • Control method for electric car V2G converter
  • Control method for electric car V2G converter

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Embodiment Construction

[0041] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0042] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0043] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations the...

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Abstract

The invention relates to a control method for an electric car V2G converter, and the method comprises the steps that an AC/DC part adopts voltage and current double-closed-loop feedback based on direct current control, including coordinate transformation and feedforward decoupling, and introduces PQ control to control active power and reactive power transmission; a DC/DC part adopts single phase shift to control the charging and discharging of a battery; a front stage AC/DC converter is used for controlling the transmission of the bidirectional active power and reactive power at a grid side; arear stage DC/DC converter is used for controlling the transmission of the active power transmission at a power battery side of an electric car and achieving the charging and discharging control of the power battery of the electric car. The method can realize the power four-quadrant operation and the reactive power control. The V2G converter realizes the transmission of the active power requiredby the V2G, can absorb reactive power from a power grid or transmit reactive power to the power grid while performing the function of charging and discharging the power battery pack of the electric car, thereby achieving the bidirectional transmission of reactive power.

Description

technical field [0001] The invention relates to the field of electric vehicle power control, in particular to a control method for a V2G converter of an electric vehicle. Background technique [0002] V2G is the abbreviation of Vehicle-to-grid, which describes such a system: when the hybrid electric vehicle or the pure electric vehicle is not running, the energy of the vehicle power battery pack is transmitted to the grid through the converter connected to the grid, Conversely, when the EV's battery needs to be fully charged, electricity can be fed from the grid to the battery. V2G can be applied to any network-enabled vehicle, since most cars are parked an average of 95% of the time, and their batteries can flow power to the grid. [0003] The electric vehicle V2G converter is used to realize the V2G function of the electric vehicle. When the grid load is low, the electric vehicle absorbs surplus electricity from the grid for charging; when the grid load is high, the elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/32B60L11/18
CPCB60L55/00B60L2200/24H02J3/1892H02J3/32Y02E40/30Y02T10/70Y02T10/72
Inventor 赵金勇殷红旭游大宁吴玉光耿洪彬刘志刚魏燕飞刘春秀李晓博徐博文
Owner STATE GRID CORP OF CHINA
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