电气化铁路末端串联补偿牵引网继电保护研究

Research on Relay Protection of End Series Compensation for Traction Power Supply System of Electrified Railway

分析复线单边供电方式下牵引网末端串联补偿引起的继电保护死区以及无选择性动作等问题,基于末端串联补偿牵引网的阻抗特性,提出变电所馈线阻抗保护的整定计算方法和分区所偏移叠加阻抗保护特性,分析末端串联补偿过电压保护装置作用下牵引网继电保护配合策略,实现末端串联补偿牵引网继电保护的合理配合关系,使设有末端串联补偿的牵引网继电保护配合关系以及选择性、速动性、可靠性与无补偿牵引网相同,解决电气化铁路牵引网末端串联补偿工程应用遇到的问题。

This paper analyzes the dead zone of relay protection and non-selective action caused by end series compensation of traction power supply system in the mode of one way feeding of double-track section,puts forward the setting calculation method of feeder impedance protection of substation and the offset superimposed impedance protection characteristics of section post based on the impedance characteristics of end series compensation traction power supply system,and analyzes the relay protection coordination strategy of traction power supply system under the action of end series compensation over-voltage protection device,achieves a reasonable coordination of relay protection of end series compensation traction power supply system.Therefore,the coordination,selectivity,quick action and reliability of relay protection of traction power supply system with end series compensation are the same as those of uncompensated traction power supply system,and problems found in the application of end series compensation engineering of electrified railway traction power supply system are solved.