The Research On The Optimization Programme Of Integrated Management Scheme For Electric Network Dynamic Reactive Power, Three-phase Unbalance And Harmonic

The operation of electrical railway resulted badly damage in power quality of substation in system side,especially such three problems:the frequently changing demand of reactive power,negative-sequence current that can filter into system network, and serious harmonic pollution.After studying much about the power transmission mode of electrical railway and its effect on power system,this thesis improved Steinmetz theory and proposed a simple method:integrated negative-sequence admittance,which aimed to compensate three-phase unbalanced load.In this thesis,lots of theoretical analysis and simulation verified its feasibility and flexibility.