变电站是地区电网的重要组成部分，要对地区电网进行可靠性评估，需首先评估变电站的可靠性指标。为了实现评估变电站可靠性的目的，采用基于元件状态空间的最小割集算法定量分析变电站电气主接线的可靠性，并以某地区电网变电站为例进行计算分析。通过算例，验证了该方法能够有效地对变电站主接线系统进行可靠性评估，为进一步对地区电网进行可靠性评估奠定了基础。%Converting station is the key component of regional power grid. The assessment of converting station reliability in⁃dex should be done before the reliability assessment of regional power grid. In order to realize the reliability assessment of con⁃verting station,the algorithm of minimum cutest based on the state spaces of electrical parts is adopted to analyze the reliabili⁃ty of power station main electrical wiring quantitatively. Taking regional power station as an example,the reliablity calculation and analysis were done. The results proves that the method can effectively assess the reliability of power station main electri⁃cal wiring. It lays a foundation of reliability assessment for regional power grid.
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