基于PTR2000模块的直流系统接地故障多点监测的研究

直流系统是发电厂、变电站中十分重要的电源系统,其组成的供电网络是一个复杂的、并联支路众多的网络,而自身的可靠性及安全性直接影响到整个电力系统的安全. 本文针对直流接地故障检测中因分布电容的存在而造成对检测结果的影响,设计了超低双频交流信号注入法,配置无线通信PTR2000模块和适用于本系统自定义的无线通信协议,实现无线多点数据采集和传送的功能,进行了接地电阻和电容值的测试和远程传送,测试结果证实了设计的正确性和可行性.

Research on Multiple Grounding Fault Detection of DirectCurrent System Based on PTR2000 Module

Direct current system is an extremely important power system in power factory and transformer substation,and the power supply network made up of it is a network of complex and multiple parallel branches. In the meantime,accountability and safety of the DC system itself have a direct impact on the safety of the whole power system. In light of the influences of distribution capacitors on detection resulting in the DC grounding fault detection,the paper designs an ultra-low dual frequency AC signal injection method. Configured with wireless communication module PTR2000 and self-defined wireless communication protocol adapted to the alleged system,it achieves wireless multiple-point data collection and transmission. This paper conducts tests and remote transmission of grounding resistance and capacitance value,and the results verify validity and feasibility of the design.