直流牵引供电系统行波保护研究

对于供电系统继电保护而言，如何提取并利用供电系统的故障信息是确保保护装置可靠性的关键因素。通过深人分析行波仅与传输线单位阻抗有关的传播特性，提取直流牵引供电系统的瞬变信息，建立了直流牵引供电系统的行波保护模型，克服了电流保护和di／dt-△I保护受线路总阻抗影响的弊端，从而提高了保护装置的可靠性和速动性。经现场试验，得到令人满意的结果。

Research on Protection Model for DC Traction Power Supply System

The way to pu factor insure the reliabilit delta I protection method er supply impedance vantage of system that is t forward and to use the message of the power supply y of the device. The paper analyses the limitation of the , which puts based on int forward traveling wave protection method fault is the key differentiation i- for the DC pow- errelated characteristics of the traveling wave and the unit of the transmission line. The traveling the traditional method in which the pro ance of the circuit, and thus improves the reliabil tern. A great number of field tests are carried out wave protection method ov tectlon ity and and the action is affected by ercomes the disad the overall imped sensibility of the relay protection sys research results are satisfactory.