Power system reliability evaluation considering substation interior under protection failure impact
Power system reliability evaluation considering substation interior under protection failure impact
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DOI：
10.1109/powercon.2014.6993630
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发表时间：
2014-12
期刊：
影响因子：
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通讯作者：
Chen Chen-Chen;Junyong Liu;G. Taylor;Mohsen Mohammadi;Chuang Deng
中科院分区：
文献类型：
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作者：
Chen Chen-Chen;Junyong Liu;G. Taylor;Mohsen Mohammadi;Chuang Deng
为了度量保护影响下变电站内部对电力系统可靠性的影响，建立了由设备级、变电站级和系统级组成的分层电力系统。提出了一种基于马尔可夫状态空间和泛函分解的分层抽样蒙特-卡罗方法。用马尔可夫模型计算变电站设备状态的概率。根据继电保护的结果进行功能分解。运用基于邻接矩阵的最小割集算法生成车站的期望事故集。对变电站设备和保护功能组分别进行抽样。通过比较期望事故集和样本故障集，识别出出口和入口线路的断开。在此基础上，计算出可靠性指标。结果表明，该方法可以从变电站内部和整个系统的角度进行评估，定量分析变电站设备和变电站结构保护失效对系统可靠性的影响。
In order to measure the impact of substation interior on power system reliability under protection influence, a hierarchical power system which consists of equipment level, substation level and power system level is established. A stratified-sampling Monte-Carlo method is proposed based on Markov state space and functional decomposition. Probabilities of substation equipment states are calculated with Markov Models. Functional decomposition is done according to the result of relay protection. The expected accident set of station is formed with the minimum cut set algorithm based on adjacency matrix. Substation equipments and protection functional groups are sampled respectively. The off outlet and inlet lines are recognized through comparing the expected accident set with the sample fault set. After that, reliability index can be figured out. The result certifies that the above-mentioned method can assess substation interior and power system as a whole and do quantitative analysis of the influence of substation equipments and substation structures with protection failure on power system reliability.