Power distribution network comprehensive evaluation method and system based on large-scale high-power electric vehicle charging and discharging,equipment and storage medium

Abstract

The invention discloses a power distribution network comprehensive evaluation method and system based on large-scale high-power electric vehicle charging and discharging, equipment and a storage medium. Charging parameters of all electric vehicles in all charging stations are detected according to a preset acquisition time period, the charging safety evaluation coefficient of each charging station on the power distribution network in each acquisition time period is counted, and at the same time, the actual flowing current of each charging station corresponding to each level of charging line in each acquisition time period is detected, so that the charging line safety evaluation coefficient of each charging station on the power distribution network in each acquisition time period is counted. Therefore, the comprehensive operation safety evaluation coefficient of each charging station on the power distribution network in each acquisition time period is evaluated comprehensively, comprehensive evaluation on the safety operation condition of the power distribution network after a large-scale electric vehicle is accessed to the power distribution network is realized, the defects of the current evaluation mode for the operation condition of the power distribution network are overcome, the comprehensiveness of evaluation indexes is expanded, and the accuracy of the evaluation result is improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle distribution network evaluation, in particular to a distribution network comprehensive evaluation method, equipment, system and storage medium based on charging and discharging of large-scale high-power electric vehicles. Background technique [0002] At present, the development of new energy electric vehicles has become an important means of low-carbon life and energy saving and emission reduction. However, when large-scale electric vehicles are connected to the distribution network for charging, the load on the distribution network will increase rapidly in a short period of time. The impact on the safe operation of the distribution network cannot be ignored. In order to understand the impact on the operation of the distribution network after the large-scale electric vehicles are connected to the distribution network, it is necessary evaluation of the operating conditions. [0003] Howe...

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Problems solved by technology

[0003] However, most of the current evaluation methods for the operation status of the distribution network are based on the charging parameters of the electric vehicle itself to evaluate the operation status of the distribution network, ignoring the impact of the overcurrent status of the charging line on the safe operation of the distribution network. After large-scale electric vehicles are connected to the distribution network, the actual current flowing in the charging line will also increase rapidly in a short period of time. When the actual current flowing in the charging line is greater than the maximum allowable current, it is very likely that Cause the charging line to burn out, and then affect the safe operation of the distribution network

Therefore, it is obviously unreasonable to evaluate the operation status of the distribution network solely based on the charging parameters of electric vehicles themselves, which will easily lead to one-sided evaluation results and low accuracy, which is difficult to comprehensively reflect after large-scale electric vehicles are connected to the distribution network. The safe operation status of distribution network

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