Design of single-terminal location algorithm for single-phase earth fault in transmission lines
Due to the complex coupling of transmission lines,the fault analysis results of transmission lines are prone to significant ranging errors.In this regard,a single-terminal location algorithm design based on single-phase earth fault of transmission lines is proposed.Based on the reflection and refraction of the trave-ling wave,the distance from the initial traveling wave to the busbar from the fault point is determined,and the specific location of the single-phase grounding fault on the line is identified.The circuit theory is ap-plied to derive the distribution of fault point parameters and frequency domain differential equations for elec-trical parameters at fault points is established.A phase mode transformation decoupling model is selected to complete component conversion and design a single terminal location algorithm for single-phase earth faults.The results show that the designed new algorithm can accurately calculate the distance between fault points,with a ranging error of no more than 0.02％,and can be effectively applied in different earth fault modes.
万方数据
维普
