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 4 不同强度噪声对同杆双回线路内部故障影响的测试结果

Tab.4 Performance test results of protection algorithm for internal fault of double-circuit transmission line on same tower under the noise with different SNR

故障情况 SNR/dB ${ { {K} }_{\rm{s} } }\left| { {Z_{\rm{sM} } } } \right|/({10^3}\;\Omega )$ $\left| { { { {Z} }_{ {\rm{dM} } } }} \right|/({10^3}\;\Omega )$ ${ { {K} }_{\rm{s} } }\left| { { { {Z} }_{ {\rm{sN} } } }} \right|/({10^3}\;\Omega )$ $\left| { { { {Z} }_{ {\rm{dN} } } }} \right|/({10^3}\;\Omega )$ 判断结果 ⅠAⅡBG l=150 km θ=90° RT=50 Ω 10 $2.851$ $3.649$ $1.834$ $8.220$ 区内故障 20 $2.548$ $7.176$ $2.400$ $14.310$ 30 $1.110$ $9.840$ $0.892$ $10.599$ 40 $0.949$ $10.756$ $0.981$ $11.227$ 50 $1.055$ $10.853$ $1.146$ $11.057$ 60 $1.135$ $11.154$ $1.127$ $11.202$