时钟管理系统中继电保护B码对时研究

Research on IRIG-B Time Relay Protection Codes in Clock Management System

继电保护B码对时在智能变电站时钟管理中有着十分重要的作用,文章分析了时钟管理系统中继电保护B码对时的应用,结合高精度继电保护测试仪与GPS时间同步系统,讲述了一套全面测试继电保护装置B码对时的方案。利用继电保护测试仪回放B码脉冲波形给继电保护装置实现其B码对时,在回放时通过修改B码脉冲的部分码元模拟各种B码异常,全面验证继电保护装置B码对时的处理逻辑;通过GPS时间同步系统对继电保护装置施加B码对时信号进行长时间拷机,验证继电保护装置B码对时处理稳定性与可靠性。该方案对继电保护装置B码对时的测试与研发有一定的参考价值。

IRIG-B time relay protection codes are quite important in smart substation clock management. The application of B code time relay protection in clock management has been analyzed in this paper. Combining with high precision relay protection tester and GPS time synchronization system, a comprehensive testing program of relay protection B time code has been introduced. When the relay protection tester being adopted to simulate B code pulse waveform playback device to the protective device in order to achieve B code, the pulse of each code dement of B code will be modified during the playback to simulate a variety of abnormal B code so as to comprehensive verify the code time protection device B processing logic. The long time B code pager protection by GPS time synchronization system will verify the stability and reliability of the protection device B code. The program has a certain reference value for relay protection B code test and development.