摘要
电力变压器在电力系统中占据着重要位置,变压器的可靠性模型对电网的设计规划与安全运行都有重要影响。文章从变压器的实际运行状态出发,将变压器所处的实际状态分为正常运行状态、绕组降额运行状态、绕组故障状态、计划停运状态等8种,采用分组马尔可夫过程对变压器可靠性模型进行评估。针对变压器实际统计数据,运用频率和持续时间法,建立变压器综合可靠性模型。仿真结果表明方法可靠有效,能够为运行维护人员提供一定的理论参考。
The power transformers are very important in the power systems.Reliability modeling of power transformers has a great impact on the design and security of the grid.For a more accurate assessment of the reliability of the power transformers, we consider the derated state of the winding and divide the state of the transformers into 8 aspects inclu-ding the state of normal operation, the derated state of winding, the winding fault and the maintenance outage and so on and use different MarKov state space models to assess the reliability model of the transformers.According to the statistics on reliability indices of power transformers, combining with frequency and duration technique, built the com-prehensive model of the transformers which studied above.The simulation shows that the method is valid and reliable which can provide the operator more theory support.
出处
《电测与仪表》
北大核心
2015年第10期50-55,共6页
Electrical Measurement & Instrumentation
