CAJ | 학술논문

对由同杆四回线与同杆双回线构成的T型同杆四回线的故障选线进行了研究，提出一种先判断故障侧并识别故障侧支路的故障选线方法。首先对同杆四回线电路部分进行解耦，分别得到两端的反序电流之间的关系。基于此电流关系判断出故障侧，从而可以迅速确定故障发生的区域。在此基础上，引入正序电压差参数，实现对故障线路的进一步的选线。理论分析及EMTP仿真验证了所提方法的正确性，且选线精度高。
대유동간사회선여동간쌍회선구성적T형동간사회선적고장선선진행료연구，제출일충선판단고장측병식별고장측지로적고장선선방법。수선대동간사회선전로부분진행해우，분별득도량단적반서전류지간적관계。기우차전류관계판단출고장측，종이가이신속학정고장발생적구역。재차기출상，인입정서전압차삼수，실현대고장선로적진일보적선선。이론분석급EMTP방진험증료소제방법적정학성，차선선정도고。
Teed circuits with four-parallel lines on the same tower consist of four-parallel lines on the same tower and quadruple-lines on the same tower. After analyzing the fault line selection, a new method is proposed. The fault region is determined at first, and then the specific fault branch is identified. The mutual electromagnetic effect between four-parallel transmission lines is decoupled to obtain the relationship between the inverted-sequence current of two power source sides. According to that, the fault side is identified and the fault area can be determined quickly. The positive-sequence voltage difference is introduced to detect the fault branch precisely. Both a theoretical analysis and EMTP simulation results show that the method is correct and has high precision. This work is supported by National Natural Science Foundation of China (No. 51177066).