基于供电能力的主变站间联络结构优化

Optimization of Contact Structure Among Main Transformer Stations in Regional Power Network Based on Power Supply Capability

针对城市经济高速发展过程中面临的变电站布点和通道走廊紧张等问题,提出了面向供电能力提高的主变站间联络结构优化方法。首先,根据各变电站空间位置及容量的不同,采用加权Voronoi图划分其各自供电区域,综合考虑各种负荷分布模型、网络布局模式等实际工程条件约束,确定变电站整体联络构架;其次,以基于主变互联和N 1准则的配电系统供电能力计算方法为基础,采用后退寻优法找出既满足最大供电能力要求、且需建设的站间联络通道最少的主变联络关系矩阵,确定供电区域内主变站间合理的联络结构。实际算例验证了该方法的有效性。

In allusion to the scarcity of the land for substation layout and transmission corridors during the rapid development of urban economy, a method to optimize the contact structure among main transformer stations in regional power network based on power supply capability was proposed. Firstly, according to the differences in spatial positions and capacities of transformer stations, the power supply region of each substation was divided by weighted Voronoi graph, and comprehensively considering various load distribution models, network layout modes and constraints of practical engineering conditions, the overall contact structure for transformer substations was determined; then based on the calculation method of power supply capability of distribution system, which complied with （N-l） principle and main transformer interconnection, and adopting backward optimization method, a main transformer contact relation matrix, which could satisfy both requirements of maximum power supply capability and the least number of inter-station contact corridors, was constructed to determine reasonable contact structure among main transformer station inside the power supply region. Taking a planned region containing five main transformer stations in two different voltage classes for example, the effectiveness of the proposed method was verified by calculation results of the example.