基于复杂网络理论的关键输电断面分析

Key Transmission Sections Analysis Based on Complex Network Theory

关键输电断面对于电网的安全稳定运行与控制具有重要意义。提出一种基于复杂网络理论的关键输电断面自动搜索方法,为实现电网的实时状态监视与快速分析计算奠定了基础。该方法利用输电介数指标识别由电网拓扑结构与潮流分布共同决定的关键输电线路,并结合复杂网络聚类算法构造适用于输电断面分析的电网分区方法;在分区的基础上,利用输电断面的特征及其与分区的关系,解决自动搜索过程中的充分性和必要性问题;最后,利用主导线路的输电介数实现了关键输电断面的重要性排序,克服后验式自动搜索方法中需要定量分析安全稳定裕度的缺陷。对中国电科院CEPRI-36系统和某省电网进行仿真计算,验证了所提模型和算法的有效性及对大电网的适应性。

Key transmission sections play an important role in the security and stability of power system operation and control. An auto-search algorithm of key transmission sections based on complex network theory was proposed, which lays a foundation for the real-time status monitoring and fast analysis of power grid. This method used transmission betweenness indicators to identify the key transmission lines which are determined by the network topology and flow distribution, and it also combined with complex network clustering algorithm to construct subarea division method which was applied to the transmission sections analysis. Based on the subareas, the sufficiency and necessity problem in the auto-search process was solved through characteristics of transmission sections and its relationship with subareas. At last, key transmission sections were ranked according to the transmission betweenness of the leading line, which overcomes the shortcomings of posteriori auto-search method, that is the requirements of the quantitative analysis of the security and stability margin. The analysis results of CEPRI-36 and certain province system verify the validity of the proposed model and algorithm and the adaptability of large-scale power grid.