Transient Processes Time Series Analysis of High-speed Railway Power Traction and Over-voltage Protection

Time series analysis method and protective measures were proposed in order to research transient process of over voltage, which caused insulation breakdown and electrical equipment damaged in high-speed railway articulated phase insulator. Equivalent capacitance model of articulated phase insulator is built and variable capacitance dynamic electromagnetic transient model of locomotive and traction power supply network is established, in which some characteristics for electricity voltage initial phase angle and impact on movement are considered. EMTDC simulation experiments are completed for electrified railway of Wuweinan-Jiayuguan, and results verify that neutral line segment method will inhibit transient over voltage.