智能变电站继电保护状态监测的一种模糊评估算法

为了改变智能变电站继电保护定期检修的模式,根据继电保护装置故障情况选取了监测信息,提出了继电保护监测信息的采集方案和分析方法。引入模糊数学理论,基于模糊综合评判思想建立继电保护状态评估模型;将状态参量信息用隶属函数表示,对继电保护装置的在线监测信息和历史记录信息开展量化评估,并综合得出继电保护的运行状态。实例证明,该评判方法是合理和有效的。状态评估的应用将以往变电站定期检修策略转换为状态检修策略,可有效地减少继电保护检修费用,提高变电站系统运行的可靠性。

A fuzzy evaluation algorithm for condition monitoring of smart substation relay protection

In order to change the mode of intelligent substation relay protection maintenance, the monitoring information is selected according to the relay protection device fault condition and a collection and analysis method of relay protection monitoring information is proposed. By introducing the theory of fuzzy mathematics, the relay protection state evaluation model is set up based on the fuzzy comprehensive evaluation thoughts and the state information is represented by the membership function. The quantitative assessment is carried out with online monitoring and record information of relay protection device and the running state of the relay protection is defined. An example shows that this evaluation method is reasonable and effective. The application of condition assessment has converted past regular maintenance into condition-based maintenance, which can reduce the maintenance costs of relay protection effectively and improve the reliability of substation system.