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A Control Method of Electric Vehicle Based on Virtual Inertial Adaptive Algorithm

An adaptive algorithm and virtual inertia technology, applied in electric vehicles, current collectors, electric energy management, etc., can solve the problems of lack of flexibility and adaptability to different working conditions in the system

Active Publication Date: 2021-01-05
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, in the existing research, due to the fixed value of the virtual inertial control parameters, the system lacks the ability to be flexible and adapt to different working conditions. Therefore, adaptive control strategies are often used to make up for the above deficiencies

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  • A Control Method of Electric Vehicle Based on Virtual Inertial Adaptive Algorithm
  • A Control Method of Electric Vehicle Based on Virtual Inertial Adaptive Algorithm
  • A Control Method of Electric Vehicle Based on Virtual Inertial Adaptive Algorithm

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Embodiment Construction

[0049] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.

[0050] The invention proposes a virtual inertia self-adaptive control method for the bidirectional power converter of the electric vehicle. It provides a grid-friendly interface for electric vehicles, enables them to participate in grid interaction, and provides frequency regulation and voltage regulation services for the system. The invention can restrain the DC voltage from changing too fast when the DC grid load fluctuates, and quickly restore the voltage to the rated value when the load fluctuation disappears, thereby providing inertial support for the grid voltage.

[0051] Such as figure 1 Shown, the present invention comprises the following steps:

[0052] Step 1. Establish the electric vehicle power ba...

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Abstract

The invention discloses an electric vehicle control method based on a virtual inertia adaptive algorithm. The electric vehicle control method comprises the following steps: firstly an electric vehiclepower battery circuit model is established; secondly a power battery bidirectional DC / DC converter is controlled so as to have the capability of providing virtual inertia; and finally the charging and discharging characteristics of the electric vehicle and related constraints are considered and the purpose of providing inertial support for the DC power grid by the electric vehicle is achieved byadding the virtual inertial control link and the adaptive control link. The sharp change of the DC voltage can be suppressed in case of fluctuation of the DC grid load and the voltage can be quickly restored to the rated value when the load fluctuation disappears so as to provide the inertial support for the power grid voltage.

Description

technical field [0001] The invention belongs to the technical field of power grid demand side response, and in particular relates to an electric vehicle control method based on a virtual inertia self-adaptive algorithm. Background technique [0002] After large-scale electric vehicles are connected to the microgrid, due to the existence of a large number of power electronic devices, the system inertia is low. When disturbances such as distributed energy output fluctuations or frequent load switching occur, the system frequency and voltage fluctuations will intensify, directly threatening the microgrid. Safe and stable operation of the power grid. In the AC microgrid, in order to solve this problem, some scholars proposed to control the grid-connected inverter by referring to the mechanical equation and electromagnetic equation of the synchronous generator, so that the virtual synchronization of the grid-connected inverter is comparable to the synchronous generator in terms o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32H02J3/24B60L55/00
CPCB60L55/00H02J3/24H02J3/32Y02T10/72
Inventor 卫志农朱小鹏
Owner HOHAI UNIV