统一潮流控制器选址定容的关键影响因素分析及优化方法

针对利用统一潮流控制器(UPFC)的潮流控制能力来改善输电断面潮流分布、解决关键输电线路过载问题的应用场景,基于电网络理论推导了UPFC串联侧装置所需安装容量与关键输电线路潮流转移需求、UPFC安装位置、网架结构参数之间的关系,提出了UPFC串联侧装置安装容量的计算方法。在此基础上,分析了影响UPFC装置安装容量的主要因素,并针对两种典型的网架结构,研究了转移单位潮流所需的UPFC串联侧装置安装容量受UPFC安装位置、网架结构参数的影响情况。进一步,提出了一套简单实用的UPFC安装位置和容量的优化方法。案例分析结果验证了所提出的UPFC串联侧装置安装容量计算方法和关键影响因素分析的有效性,同时验证了所提出的UPFC安装位置和容量优化方法的可行性。

Critical Factor Analysis and Optimization Method for Placement and Sizing of Unified Power Flow Controller

In view of the application scenario where the unified power flow controller(UPFC)is operated to improve the power flow distribution of a transmission section and alleviate the overload of transmission lines, the formulas of determining the capacity demand of the series device of UPFC concerning the amount of transferred power flow, the location of UPFC and grid structure parameters are deduced based on electrical network theories. Then, the calculation method of the installed capacity of the series device of UPFC is proposed. On this basis, the critical factors affecting the capacity requirement are studied. In two typical power grid configurations, the influences of UPFC location and grid structure parameters on the required capacity per transferred power flow are analyzed. Furthermore, a simple and practical method for the optimization of the placement and sizing of the UPFC device is proposed. Finally, case study results verify the effectiveness of the proposed calculation method, the critical factor analysis, and the feasibility of the optimization method.