Safety and Reliability Evaluation of DC Charging Station Power Supply After Being Connected to the Distribution Network
After the charging station is connected.The negative pressure of the distribution network may fluctuate,and the accuracy of its reliability assessment determines whether the Battery Management System(BMS)can be used reasonably.However,the current method does not distinguish the relevant influencing factors,and uses a single factor threshold as the reliability evaluation threshold,resulting in inaccurate safety and reliability estimation results for distribution networks connected to DC charging station power sources.Propose a reliability estimation method for DC charging station power supply connected to the distribution network.By constructing a DC charging pile model,the power parameters of the charging station are estimated and transformed into a power grid relationship model under the power structure.Estimate the factors affecting the safety and reliability of DC charging station power supply connected to the distribution network.Based on the influencing factors determined in the estimation,partition the faults.Estimate the safety and reliability of power supply connected to the distribution network in each fault zone.Through experimental verification,it has been found that the method of connecting to the distribution network and the division of feeder lines in the fault isolation zone of the distribution network have a significant impact on the safety and reliability of the power grid.The proposed method can accurately and efficiently estimate the safety and reliability of the distribution network connected to the power source.
DC charging stationBMS power supplydistribution networksafety and reliability analysisreliability indicators
万方数据
维普
