统一潮流控制器装置级优化控制策略综述

Overview on Unified Power Flow Controller and Optimization Control Strategy

现代电网随着负荷不断增加,改善潮流分布的需求和稀缺的电力建设用地之间的矛盾日益突出。为最大程度发挥电网自身的供电能力,国内越来越多统一潮流控制器(UPFC)的工程开始建设与投运,因此UPFC装置的控制效果十分重要。本文结合国内外相关研究做了以下的工作:首先,介绍了UPFC的经典模型即双电压源模型和相应的控制原理;之后,采用电路理论中双口网络法对UPFC经典模型两端电流、电压的关系进行了分析,指出各控制器间存在交互影响问题;然后,对其优化控制策略进行了分类和综述,同时简要分析了各种方法的优化效果和存在问题;最后,列举了UPFC控制技术今后可能的研究方向。

With the increasing increase of load in power grid,the contradictions between the demand for improving power flow distribution and scarce power construction land has become increasingly prominent.To maximize the power supply capacity of the grid,more and more unified power flow controller（UPFC）projects are constructed and operated;therefore,the control effect of UPFC device is increasingly important. In this paper,the following work has been done with combination of related study both at home and abroad. Firstly,the typical model（ that is dual voltage model） and corresponding control principle of UPFC is introduced,then,the relationship between the current and voltage at the two ends of the UPFC by using the method of double port network in circuit theory is analyzed and the issue of interaction between the controllers is pointed out. After that,the optimal control strategy is classified and described and,at the same time, the optimization result of various methods and problem existence are briefly analyzed.Finally,the possible study direction of UPFC control technology is listed.