统一潮流控制器的控制系统分析及控制策略设计

详细分析了统一潮流控制器（ＵＰＦＣ）的控制系统，并将其分为主控制和辅助控制两部分。对于主控制中的串联侧控制，提出了４种基本控制方式，并以加权的方式实现ＵＰＦＣ的多种功能综合控制，使得ＵＰＦＣ的多功能优化问题转化为各杖值的动态优化问题。ＵＰＦＣ的辅助控制则通过联络线的功率反馈或电压相位差反馈对主控制中的控制参考值进行调制以增加系统阻尼。最后，综合主控制与辅助控制，提出了ＵＰＦＣ的动态控制策略，使得系

PFC CONTROL SYSTEM ANALYSIS AND CONTROL STRATEGY DESIGN

In this paper, the UPFC control system is investigated in detail as the main control and the supplementary control. Four fundamental control strategies for UPFC series side main control are discussed. The main control of UPFC series side is realized as a combination of these four control functions through changeable weighting factors. Thus to make full use of UPFC in system control and stability is really to optimise the weights of each control function. To improve the system damping, the supplementary control of UPFC is proposed, with its input as the active power or the bus voltage angle difference of the tie line, and its output as the modulation signal to the main control. Finally,the control strategy for the combined main and supplementery control is designed to improve the integrated system dynamic performance in both first and subsequent swings.