Charging load model establishment and node voltage calculation method of electric vehicle

Abstract

The invention discloses a charging load model establishment and node voltage calculation method of an electric vehicle. The method comprises: S1, establishing a load charging model of an electric vehicle; S2, establishing a dynamic load model of a power distribution system; S3, giving access points of all load charging models in the power distribution system; and S4, analyzing the impact of electric vehicle charging on the power distribution system. According to the invention, three kinds of charging load models are established, so that the result is suitable for the actual circumstance and become reliable. And on the basis of calculation of the distribution probability characteristics of node voltages of the three models, the following conclusions are made: firstly, conventional chargingmode has the greatest influence on the operational stability of the distribution network; secondly, with the quick charging mode, the peak-to-valley difference of the load is increased substantially,so that economical operation of the grid is affected greatly; and thirdly, with increasing of the proportion of replacing the battery charging mode, the peak-to-valley difference of the load is reduced and the economical efficiency of the grid operation is increased, and the stability of distribution network operation of the power system is enhanced. Therefore, the charging load model establishment and node voltage calculation method has the great significance in research and development of charging vehicles in the field.

Description

technical field [0001] The invention belongs to the field of distribution networks, establishes three charging load models of electric vehicles based on Monte Carlo, and proposes a calculation method for node voltage probability distribution of these models. Background technique [0002] At present, there are assumptions that do not conform to the actual situation in the research on the establishment of the electric vehicle model. The consideration of the charging method is not comprehensive enough, or the research on the impact of electric vehicles on the distribution network is not deep enough. The established model and calculated results are different from the actual situation. far. Contents of the invention [0003] The technical problem to be solved by the present invention is to establish a model that conforms to the actual situation and accurately calculate the node voltage, thereby providing a method for establishing an electric vehicle charging load model and calc...

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Problems solved by technology

[0002] At present, there are assumptions that do not conform to the actual situation in the research on the establishment of the electric vehicle model. The consideration of the charging method is not comprehensive enough, or the research on the impact of electric vehicles on the distribution network is not deep enough. The established model and calculated results are different from the actual situation. far

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