Method for carrying out real-time reactive compensation on power distribution network by using electric vehicle charger

Abstract

The invention provides a method for carrying out real-time reactive compensation on a power distribution network by using an electric vehicle charger. The method mainly comprises the following steps: reading the charging information of each electric vehicle at a particular place accessed into a power distribution network area at the current moment, reading the power distribution network information at the particular place at current moment, and screening out adjustable electric vehicles; determining the capacitive operation mode or sensitive operation mode of the charger at the current moment according to the charging information of each adjustable electric vehicle and the power distribution network information and calculating the adjustable range of the operating power factor of the charger of each adjustable electric vehicle at the current moment, and thus calculating an optimal value by using optimization algorithm. The optimization objectives of the method are voltage safety and stability at the particular place, and the restrictive condition of the method is the charging requirement of each electric vehicle at the current moment, so that the problem of real-time reactive compensation by using the electric vehicles is successfully solved.

Description

technical field [0001] The invention relates to the technical field of reactive power compensation of a distribution network, in particular to a method for real-time reactive power compensation of a distribution network by using an electric vehicle charger. Background technique [0002] In recent years, with the depletion of energy and the continuous deterioration of the environment, energy conservation and environmental protection have gradually become an important foothold for the development of various countries. Due to the shortcomings of traditional vehicles such as large energy consumption, serious exhaust pollution and noise pollution, electric vehicles have become a research hotspot. Under the impetus of the international environment, the use of electric vehicles in my country is becoming more and more popular, and the research on electric vehicles has also achieved certain results. my country's electric vehicle industry is moving towards the direction of popularizat...

AI Technical Summary

Problems solved by technology

The capacity of traditional reactive power compensation equipment is fixed after planning. If a large number of electric vehicles are connected to cause a serious voltage drop in some places, it is necessary to increase the capacity of reactive power compensation equipment. This will cost a lot of extra money. On the other hand, due to the randomness and dispersion of the electric vehicle charging load, it is impossible to determine where and when the electric vehicle will be charged in a day, so it is impossible to determine when the voltage will drop, where the voltage will drop, and whether the drop will occur. Seriously, how many times the voltage drop exceeds the allowable range in a year, and the traditional reactive power compensation equipment has the disadvantages of invariable upper limit of capacity and immovable equipment itself, which will cause waste of capacity of traditional reactive power compensation equipment, economical poor

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