基于配电网元件故障率变化的电动汽车 并网可靠性评估.

After large-scale electric vehicle is connected to the distribution network，the load of the distribution network will increase，and then the power quality of the distribution network will be affected． Therefore，a reliability analysis method of power grid based on component failure rate change is proposed in combination with the actual change of component failure rate． According to various factors related to charging power demand，the charging power of the electric vehicle is modeled，and the load variation of the original distribution network caused by the access of electric vehicle to the distribution network in different scales is simulated． Considering the change of component failure rate，the Weibull distribution is used to model the bathtub curve of component failure rate． The reliability of power grid is evaluated by Monte Carlo method． In reliability analysis，the real-time failure rate of components is taken as the criterion． Taking the IEEE － RBTS Bus2 distribution system as an example，the reliability indexes of each load point change with time are analyzed and calculated，and the relationship between the reliability indexes and the time of the system under different scale electric vehicles connected to the distribution network is studied． The reliability index calculated by this method is closer to reality． [ABSTRACT FROM AUTHOR]