Design of the Disconnection Fault Detection System for Low Voltage Cable in Power System

2019 4th Asia Conference on Power and Electrical Engineering

能源学;电工学

Wang, Bochuan^1 ; Wu, Xixiu^1 ; Zhou, Wei^1 ; Hu, Yunfeng^1 ; Li, Chao^1 ; Tang, Jinrui^1

WuHan University of Technology, WuHan, China^1

关键词: Attenuation characteristics;    Channel characteristics;    Fault detection systems;    Impedance characteristics;    Low voltage power line communication;    Noise characteristic;    Signal modulations;    Spread spectrum modulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/486/1/012095/pdf
DOI  :  10.1088/1757-899X/486/1/012095

来源: IOP

【 摘 要 】

The paper proposes a designed scheme for the fault detection system of low voltage cable breakage in power system. By analyzing the characteristics of low voltage power line communication channel, establishing the channel characteristic model and comparing the measurement data with the simulation model, the author summarizes the impedance characteristics, noise characteristics and attenuation characteristics. It can be concluded that the suitable frequency range for communication is between 120kHz and 20kHz. The signal modulation method is studied, that the spread spectrum modulation is a preferred method. It also shows good results in the simulation. The object testing is done. The device and test method selected by author can be used to realize the early warning function of the power system low-voltage cable disconnection fault.