CAJ | 학술논문

提出了面向继电保护的同杆线路跨线故障解析分析方法,通过注入电流法求解故障端口等值阻抗,以零序电流控电压源的方式结合边界条件分析不同类型的跨线故障,进而提取相应的保护特征量研究跨线故障对接地测量阻抗、相间测量阻抗等距离保护元件的影响及其趋势.考虑了互感强弱、线路背端支撑电源强弱、线路阻抗、故障位置等相关因素的影响,以解析表达式定量地分析了保护范围的准确性,为继电保护的整定与配置提供了理论依据.最后结合广东电网进行实例验证.
제출료면향계전보호적동간선로과선고장해석분석방법,통과주입전류법구해고장단구등치조항,이령서전류공전압원적방식결합변계조건분석불동류형적과선고장,진이제취상응적보호특정량연구과선고장대접지측량조항、상간측량조항등거리보호원건적영향급기추세.고필료호감강약、선로배단지탱전원강약、선로조항、고장위치등상관인소적영향,이해석표체식정량지분석료보호범위적준학성,위계전보호적정정여배치제공료이론의거.최후결합엄동전망진행실례험증.
The analysis method of parallel lines inter-line fault for relay protection is presented, which can accurately analyze the influence tendency and boundary of inter-line fault on the main distance element, so as to extract related measurement parameters in order to study the influence. Fault port equivalent impedance is solved with injecting current, and the analysis of different types inter-line fault is dealt with, combining the method of zero sequence current controlling voltage source with the fault boundary conditions. Considering the influence of related factors such as: strength of mutual inductance and support supply of line, line impedance and fault location etc, the accuracy of protection range with the analytical expression is quantitatively analyzed, which provides theoretical basis for the setting and disposition of relay protection. Finally, the analysis result is verified by the example of Guangdong power grid.