Condition Monitoring and Reliability Analysis of Power Systems for Underground Cavern Facilities

In the context of underground cavern facilities, electrical power substation is now located underground instead of the conventional aboveground. The operating environment of power system has therefore changed, which may directly degrade the heat dissipation capability of the power system. A condition monitoring and reliability analysis of power facilities for underground substations in high humidity, high temperature and salty environment is presented, which includes three subsystems: Environment Condition Monitoring System, Operation Condition Monitoring System and Reliability Condition Monitoring System. It is capable of power system real-time monitoring, analysis, protection, optimization, and forecast failures of power facilities such as transformers, power cables and induction machines. The system has been employed in underground substations located below seabed with hazardous environment.