Electric vehicle charging pile charging improvement method based on optimized power distribution network distribution

Abstract

The invention discloses an electric vehicle charging pile charging improvement method based on optimized power distribution network distribution, and relates to a layered and graded V2G power distribution network which comprises a plurality of transformer substations, a plurality of switching stations and a plurality of ring network stations. According to the method, charging pile information and user trip chain information are collected, the charging states of the electric vehicles are classified, then the V2G power distribution network capacity of each area is calculated, the switching station and the ring network station are configured according to the V2G power distribution network capacity of each area, and the ring network station and the switching station collect and summarize the V2G power distribution network capacity of the electric vehicles to serve as an effective adjustable load of the V2G power distribution network. The improved method provided by the invention has good power supply and user access adaptive capacity, flexible inter-station load transfer and balance capacity and rapid network fault self-healing capacity, and meanwhile, has good economical efficiency and implementability in construction and reconstruction of the power distribution network in a central urban area; and a solid foundation is laid for realizing high-quality development of an electric vehicle V2G power distribution network and building a first-stream energy internet.

Description

technical field [0001] The invention relates to the field of distribution network optimization, in particular to an improved method for charging electric vehicle charging piles based on optimizing distribution network distribution. Background technique [0002] In the power system, there are many uncertain factors, which can easily cause grid fluctuations. As more and more new energy sources are connected, the uncertainty of such a system will further increase. Including load forecasting errors, photovoltaic power generation, wind power generation, electric vehicle charging and discharging behavior, different topological structures of the power system, and forecasted electricity prices are all sources of grid fluctuations and uncertainties. [0003] The popularization of electric vehicles makes the number of them connected to the power grid constantly increasing, and their overall charging load accounts for an increasing proportion of the total load in the connected areas. ...

AI Technical Summary

Problems solved by technology

Secondly, the large-scale electric vehicle needs to rely on more large-scale electric vehicle basic charging facilities, including charging piles and charging stations, and these factors have not been fully considered in the traditional distribution network planning

Due to the large-scale electric vehicles connected to the distribution network, its strong randomness will make the entire power system have very high requirements for stability and reliability. Therefore, the traditional generator set must have a certain reserve capacity to meet the increased demand. charging load, which increases the operating cost of the power system

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