Research on the Location of Phase to Ground Fault for Distribution Network Using Transient Signals
A new earth fault location method for non-effective earthed neutral network using transient signals measured at the bus terminal is presented.Based on the mode network of the single phase to ground fault, the s-domain equation of the faulty feeder is derived and the discrete difference equation is obtained by z-transform, Then fault distance is evaluated form transient data using the least square estimation.The adoption of r-mode equivalent circuit reduces the number of the parameters to be estimated and simplifies the distance estimation algorithm.The algorithm is effective on intermittence faults as it makes use of transient signals and, consequently, a shorter than half cycle data window.EMTP software was used for simulating the typical distribution system and MATLAB was used for data process.The simulation and calculation results proved the accuracy and reliability of the correlation coefficient method and entropy method.The fault location scheme proposed in this paper is valuable in practical application..
Bilinear transformation Fault location Non-effective earthed neutral system Transient signal Parameter estimation
Shicong Ma Qing He Jun Yi Mian Du Yanchen Yang Hua Zhang
China Electric Power Research Institute, Haidian District, Beijing 100192 China State Grid Corporation of China, Xicheng District, Beijing100031 China
国际会议
南京
英文
761-765
2015-09-21（万方平台首次上网日期，不代表论文的发表时间）