Real-time reactive power compensation method for distribution network using electric vehicle charger

Abstract

The invention provides a method for real-time reactive power compensation to a distribution network by using an electric vehicle charger. The method mainly includes: reading the charging information of each electric vehicle connected to a certain location in the distribution network area at the current moment, reading the distribution network information of the certain location at the current moment, and screening out the controllable electric vehicles; The charging information of each adjustable electric vehicle and the distribution network information determine the capacitive operation mode or inductive operation mode of the charger at the current moment and calculate the adjustable range of the operating power factor of the charger for each adjustable electric vehicle at the current moment , and then use the optimization algorithm to calculate the optimal value. The invention takes the safety and stability of the voltage at a certain place as the optimization target, and takes the charging demand of each electric vehicle as the constraint condition at the current moment, and successfully solves the problem of real-time reactive power compensation using the electric vehicle charger.

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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