Power grid peak and frequency regulation method and system and electric vehicle charging and discharging scheduling system

Abstract

The invention discloses a power grid peak and frequency regulation method and system and an electric vehicle charging and discharging scheduling system. The method comprises the steps of inputting the power utilization data, which is collected in real time, of a target transformer area into a power utilization prediction model, and obtaining a power prediction result of the target transformer area; according to the power prediction result, judging the load demand of the target transformer area in the next time period; and controlling the charging or discharging of an electric vehicle connected with a charging pile in the target transformer area according to the load demand. According to the method, the electric vehicle is used as power grid energy storage equipment, the electric vehicle is charged in the power utilization low-peak period to achieve valley filling, the electric vehicle supplies power to the power grid in the power utilization peak period to achieve flat peak, charging and discharging of the electric vehicle are reasonably dispatched, and the peak regulation and frequency modulation functions of the urban power grid are achieved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and system for peak regulation and frequency regulation of a power grid and a charging and discharging dispatching system for electric vehicles. Background technique [0002] Due to their cheap price, energy saving and environmental protection, electric vehicles have been widely used in China. However, when electric vehicles are commonly used for commuting in cities, a large number of electric vehicles arrive at the office park at the same time during working hours, and arrive at the office park at the same time after get off work. In residential areas, electric vehicles are charged in the same distribution network area at the same time, which is easy to add more power load to the original peak power load, resulting in overload of local distribution transformers in some time periods, resulting in changes in distribution network power flow distribution , which may c...

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Problems solved by technology

[0002]Because of its cheap price, energy saving and environmental protection, electric vehicles have been widely used in China. However, when electric vehicles are commonly used for commuting in cities, a large number of Electric vehicles arrive at the office park at the same time during working hours, and arrive at residential areas at the same time after get off work. They are concentrated in the same distribution network area at the same time to charge electric vehicles. Local distribution transformers are overloaded during certain periods of time, causing changes in the power flow distribution of the distribution network, which may cause network loss and network congestion

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