西气东输三线站场ESD与PLC系统通信现状研究与改进措施

Research and Improvement Measures of Communication Between ESD and PLC System in Third West to East Gas Transmission Pipeline Station

ESD与PLC系统是输气站场最重要的两个子系统,在实际应用中,ESD保护逻辑的执行需要ESD与PLC两个系统互相配合工作,这就需要两个系统间要形成一套稳定可靠的通信体系。本文对西气东输三线站场ESD与PLC系统的通信配置现状进行研究发现,现役ESD与PLC系统通信设计存在缺陷,某些情况下将会导致ESD与PLC通信中断,且现有的系统逻辑中并没有对ESD与PLC间的通信状态进行诊断,运行人员难以及时发现通信故障,使得系统容易带病运行。通过采用相应的技术改造等防范措施来增强西三线站场ESD与PLC通信的稳定性,明显提高了ESD系统应用可靠性。

ESD and PLC systems are the two most important subsystems in the gas transmission station.In practical application,the implementation of ESD protection logic requires the cooperation of ESD and PLC systems,which requires the formation of a stable and reliable communication system between the two systems.This paper studies the status quo of communication between ESD and PLC system in the third-line station of West-to-East Gas Pipeline,and finds that there are some defects in the communication design between ESD and PLC system in service,which will lead to the interruption of communication between ESD and PLC in some cases.In addition,the existing system logic does not diagnose the communication state between ESD and PLC,which makes it difficult for operators to find communication faults in time and makes the system easy to run in spite of illness.The stability of ESD and PLC communication in the West Third Line Station is enhanced by adopting corresponding technical renovation and other preventive measures,and the application reliability of ESD system is obviously improved.