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Reactive compensation method of electric vehicle charging system

A charging system, electric vehicle technology, applied in electric vehicles, reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve the problems of reducing power transmission efficiency, voltage reduction of distribution network, paralysis of distribution network, etc. Achieve the effect of improving power utilization efficiency and improving power factor

Inactive Publication Date: 2016-11-30
CHENGDU XINWEIBAO TECH CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Current research and forecasts show that the growth of electric vehicle load has little impact on the total power load, but has a greater impact on the distribution network. Due to the natural use characteristics of electric vehicles, the naturally formed charging may affect the peak load of the original distribution network. Periodically cause additional power consumption peaks, which have a great impact on power quality, network loss, etc.
In addition, when a large number of car chargers are running at the same time, there may be a large amount of reactive power in the distribution network, which will reduce the efficiency of power transmission
When the reactive power is insufficient, the voltage of the distribution network will drop, and in severe cases, the distribution network will be paralyzed

Method used

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  • Reactive compensation method of electric vehicle charging system
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  • Reactive compensation method of electric vehicle charging system

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Embodiment Construction

[0030] figure 1 A block diagram of an electric vehicle charging system 10 with a reactive power compensation device is shown, and the system 10 includes:

[0031] The distribution network detection module 11 is used to detect in real time the operating parameters of the distribution network 20 connected to the charging system and supplying power to the charging system, the operating parameters including power factor;

[0032] A plurality of chargers 12 are used to charge a plurality of electric vehicle battery packs 30, each of which includes an AC / DC conversion module;

[0033] The dynamic reactive power compensation module 13 is used to perform reactive power compensation to the charging system 10 in real time to improve the power factor of the charging system 10;

[0034] The control module 14 is used to control the operation of the charging system 10 , including controlling the charging power of each charger mentioned above to the battery pack 30 , and controlling the rea...

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Abstract

The invention discloses a reactive compensation method of an electric vehicle charging system. Through the method, a dynamic reactive compensation module can be controlled to compensate reactive power of a power distribution network after power distribution network operation parameters of the charging system are detected, so that a reactive power factor of the power distribution network reaches a relatively ideal range with relatively small fluctuation and the charging efficiency and safety are greatly improved.

Description

Technical field [0001] The invention relates to a reactive power compensation method for an electric vehicle charging system. Background technique [0002] With the deepening of the global energy crisis, the depletion of oil resources and the increasing harm of air pollution and global temperature rise, energy saving and emission reduction are the main directions of future automotive technology development. Japan's Toyota Corporation took the lead in developing the Prius hybrid car, which opened the prelude to the era of electric vehicles. As a new generation of transportation, electric vehicles have incomparable advantages over traditional vehicles in terms of energy saving, emission reduction and reducing human dependence on traditional fossil energy. Since 2009, the Chinese government has intensively introduced policies and measures to encourage the development of electric vehicles and related industries, and enterprises have significantly increased their investment in e...

Claims

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Application Information

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IPC IPC(8): H02J3/18B60L11/18
CPCB60L55/00H02J3/1807Y02E40/30Y02T10/70
Inventor 靖新宇
Owner CHENGDU XINWEIBAO TECH CO LTD