继电保护在线整定中最小断点集的快速求取方法分析-analysis of fast calculation method of minimum breakpoint set in relay protection online setting.docxVIP

华中科技大学硕士学位论文 华 中 科 技 大 学 硕 士 学 位 论 文 II II 界节点进行迁移，保证了分区结果具有较高的并行计算效率。整个分区方法具有近 似线性的时间复杂度，计算速度快。 关键词：在线整定；最小断点集；结构脆弱性；在线校核；电网分区 III III Abstract The disadvantages of off-line relay coordination mode become increasingly prominent, because of flexible and polytropic grid operation mode. And the unreasonable settings have become a major security risk which could lead to blackouts accident. On-line coordination can completely solve the problems, so it has caused a wide range of academic research. Break point set is the key calculation step in on-line coordination, which need a long calculation time. In addition, it plays an important role in impacting protection setting’s performance. Therefore, the fast calculation method of the optimal break point set has become one of the most important research directions in on-line coordination. If the optimal break point set is calculated on-line directly, it is difficult to meet the requirement of real-time applications. For this reason, the calculation of the optimal break point set in on-line coordination is converted to the “off-line calculation, off-line assessment, on-line update” of the minimum break point set (MBPS). The main contents are as follows: An optimization method which contains the space distribution characteristics has been proposed for MBPS computation. In order to realize parallel computation of the MBPS, the proposed method combines MBPS’s space discrete characteristics and clustering characteristics with binary particle swarm optimization algorithm. For this reason, the optimization algorithm’s convergence speed and success rate have been improved greatly. What more, according to MBPS’s symmetry characteristics, it is easy to obtain a number of MBPSs quickly which locate in different places. On the basis of the above research, the structural vulnerability assessment model of the MBPS has been built. In the model, the break point’s vulnerability assessment is converted to its line’s structure vulnerability as