CAJ | 학술논문

通过深入研究同杆四回线与双回线构成的混合输电线路的特点，提出了相应的反序正序网络。在此基础上，综合反序正序电流，再利用故障支路的母线处始端推算到故障点的反序正序电压与从T支节点处推算到故障点的反序正序电压相等的关系得出测距方程，基于方程的解同时进行故障侧判断和测距。大量的PSCAD/EMTDC仿真结果验证了新方案的正确性及精确性，并且该算法的精度不受故障类型、过渡电阻、系统运行方式和系统阻抗等因素的影响。
통과심입연구동간사회선여쌍회선구성적혼합수전선로적특점，제출료상응적반서정서망락。재차기출상，종합반서정서전류，재이용고장지로적모선처시단추산도고장점적반서정서전압여종T지절점처추산도고장점적반서정서전압상등적관계득출측거방정，기우방정적해동시진행고장측판단화측거。대량적PSCAD/EMTDC방진결과험증료신방안적정학성급정학성，병차해산법적정도불수고장류형、과도전조、계통운행방식화계통조항등인소적영향。
Based on the characteristics of mixed lines composed by four-circuit lines and double-circuit lines on the same tower, the corresponding inverted-sequence positive sequence networks are proposed. on the basis, this paper combines with negative current and positive current and uses the relationship that the negative and positive voltage from bus beginning terminal of fault branch to fault point is equal to the voltage from the T branch node to fault point to derive the fault location equation. According to the solution of the equation, its fault side and fault locating are detected simultaneously. Results of PSCAD/EMTDC simulation verify that the new scheme is accurate and not influenced by fault type, transition resistance, system operating mode and other factors on locating precision.