Zhu L.-L.,Zhoukou Electrical Power Corporation |
Zhang H.-Z.,Zhoukou Electrical Power Corporation |
Wang Z.-G.,Zhoukou Electrical Power Corporation |
Zhang H.-T.,Zhoukou Electrical Power Corporation |
And 3 more authors.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2011
According to the change characteristic of the transient component of positive-sequence current when single-phase open-line fault with non-grounding or power-side-grounding or load-side-grounding happens, a novel selection and location method for single-phase-open-line fault of distribution network is presented. In this method, singularity detection of wavelet is employed to obtain the polarities and magnitudes of modulus maximum of the transient component of positive-sequence current caused by the fault. Comparing them, the fault line can be determined. The polarities and magnitudes are combined with wavelet neural networks to realize the mapping relationship between modulus maximum and fault point position, and then the fault location can be realized. Simulation results show that the proposed method is of precision and reliability.