This paper introduces the problem of hidden failures in relay protection of power systems.
介绍了电力系统继电保护中存在的隐形故障问题。
Hidden failures of relay protection are the main cause of transmission lines cascading trips.
继电保护隐藏故障是造成输电线路连锁跳闸的主要原因。
Hidden failures can be early found and maintenance cost can be cut through the monitoring of machine status and the use of failure diagnostic technique.
通过对机器状态的监测及故障诊断技术的应用，可以及早地发现事故隐患，减少维修成本。
The basic process and theory of power system cascading failure considering protection system hidden failures were analyzed to decrease bulk blackout failure.
继电保护系统的隐藏故障对电网的运行威胁很大，而隐藏故障的在线诊断十分困难。
Hidden failures in protection system are great threats to the operation of power grids, while there are almost no on-line diagnostic methods for hidden failures so far.
继电保护系统的隐藏故障对电网的运行威胁很大，而隐藏故障的在线诊断十分困难。
Protection system hidden failures is one of the main causes of large-scale blackouts, which inevitably will lead to disastrous consequences of power grids from cascading failures.
继电保护系统的隐藏故障是造成大规模停电事故的罪魁祸首之一。
This research defined hidden failures of protection schemes and showed that these kinds of failures have contributed in the degradation of 70-80 percent of the wide-area disturbances.
研究定义了继电保护的隐性故障而且展现这些种故障种类，有助于削减70- 80%的大面积扰动。
It was found that hidden failures in protection schemes caused the disconnection of power system elements in an incorrect and undesirable manner contributing to the disturbance degradation.
继电保护中隐性故障以不正确的和不期望的方式切除电力系统元件造成电力系统大面积扰动。
The reliability assessment to relay protection system can discover the hidden failures of relay protection device, to avoid the expansion of accident due to the incorrect action of relay protection.
对继电保护系统进行可靠性评估，能及时发现继电保护装置的隐患，避免电网发生故障时因保护装置不正确动作引起事故的扩大。
These functions include fast adjusting parameters, checking and processing warning signals in order to improve the control quality and eliminate the system failures and the hidden troubles.
利用数据记录、统计功能，可快速的调整参数、检查处理报警信息，以提高控制品质，排除系统故障及隐患。
The drainage system in Qingxi Hydropower Plant originally adopted conventional relay control for its pump control system, which had many hidden troubles and resulted in multiple failures.
青溪水电厂排水系统的水泵控制系统原设计采用旧式常规电动机控制系统，投入运行后多次出现故障，存在许多安全隐患。
The drainage system in Qingxi Hydropower Plant originally adopted conventional relay control for its pump control system, which had many hidden troubles and resulted in multiple failures.
青溪水电厂排水系统的水泵控制系统原设计采用旧式常规电动机控制系统，投入运行后多次出现故障，存在许多安全隐患。
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