±800 kV换流站主接线可靠性评估

Reliability Evaluation for Main Electrical Scheme of a ±800 kV Converter Station

随着设备状态检修理论研究和应用的深入,提出了改进的元件四状态模型。该模型重新定义元件的异常状态和检修状态,将元件的状态检修状态与计划检修状态合并归入元件的检修状态,并确定了各状态之间的转换关系及参数的求取。提出了利用元件的合并分区方法简化主接线,形成一个简单的有向网络,并将改进的元件四状态模型应用于区域可靠性参数的确定。借用矩阵乘法简化最小路矩阵搜索的方法对有向网络进行最小路搜索,利用解析法枚举有向网络的各种故障状态,并编程计算出该网络的可靠性数据。将该方法应用于和平±800 kV换流站主接线可靠性评估,对计算结果证明了该算法的正确性。

Along with the development of research and application of the equipment state maintenance theory, an improved fourstate component model is proposed. The abnormal state and maintainable state of components are redefined and the component status maintenance state and scheduled maintenance state are incorporated in the maintenance state while the conversion relationship between different states and the parameter calculation are determined. The components combining and subzoning is used to simplify the main electrical scheme to form a simple directional network, and the improved four-state component model is applied in the subzone reliability parameter determination. The least path matrix searching method is simplified by matrix multiplication to search the least path matrix for the directional network, with each fault state enumerated by the analytical method. The reliability index of the network is programmed and worked out. This method has been applied in the main electrical scheme in Heping ± 800 kV converter station with the correctness of the method verified by the results.