基于测量波阻抗的同杆双回输电线路故障识别

叶睿恺,吴浩,董星星

Fault identification of double-circuit transmission lines on same tower based on measuring wave impedance

Rui-kai YE,Hao WU,Xing-xing DONG

表 2 同杆双回线路外部故障时算法性能测试结果

Tab.2 Algorithm performance test results for external fault of double-circuit transmission line on same tower

序号 故障类型 l / km $\theta \,/\,( ^ \circ )$ ${R_{\rm{T}}}$ / Ω ${{{K}}_{\rm{s}}}\left| {{Z_{\rm{sM} }}} \right|\,/\,({10^3}\;\Omega )$ $\left| {{{{Z}}_{{\rm{dM}}}}} \right|\,/\,(1{0^{ - 9}}\;\Omega )$ ${{{K}}_{\rm{s}}}\left| {{{{Z}}_{{\rm{sN}}}}} \right|\,/\,({10^3}\;\Omega )$ $\left| {{{{Z}}_{{\rm{dN}}}}} \right|\,/\,(1{0^{ - 9}}\;\Omega )$ 判断结果 1 CG 50 15 200 8.992 12.464 4.402 0.109 区外故障 BCG 50 15 200 9.055 0.135 4.396 0.208 ABCG 50 15 200 8.994 0.122 4.396 0.168 2 CG 100 120 500 8.253 0.396 4.402 2.249 区外故障 BCG 100 120 500 8.257 0.360 4.402 0.126 ABCG 100 120 500 8.257 0.110 4.402 0.138 3 AG 50 8 100 8.978 6.865 4.402 0.253 区外故障 AG 50 15 100 8.995 2.353 4.402 0.260 AG 50 45 100 9.014 0.252 4.402 0.195 AG 50 90 100 9.038 1.256 4.402 0.183 AG 50 120 100 9.007 1.411 4.401 0.244 4 AC 100 8 − 8.184 2.354 4.402 0.152 区外故障 AC 100 15 − 8.208 4.916 4.402 0.259 AC 100 45 − 8.405 2.649 4.402 0.024 AC 100 90 − 8.407 0.430 4.402 0.023 AC 100 120 − 8.361 0.353 4.401 0.071 5 BG 50 45 0 9.050 1.126 4.406 0.069 区外故障 BG 50 45 100 9.045 3.267 4.406 0.423 BG 50 45 300 9.040 13.983 4.406 0.617 BG 50 45 600 9.037 12.736 4.406 5.109