标题：Impedance Control of Thyristor Controlled Series Capacitor to Improve the Transfer Capability of Remote Wind Farms
作者：Li, Kejun; Sun, Ying; Lee, Wei-Jen; Cui, Jintao
作者机构：[Li, Kejun; Sun, Ying; Cui, Jintao] Shandong Univ, Sch Elect Engn, Jinan 250061, Peoples R China.; [Lee, Wei-Jen] Univ Texas Arlington, Energy Syst 更多
会议名称：Annual Meeting of the IEEE Industry-Applications-Society
会议日期：OCT 03-07, 2010
来源：2010 IEEE INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING
关键词：Thyristor Controlled Series Capacitor (TCSC); impendance control;; modifying feedback with firing angle; variable structure PID control;; transfer capability of wind farms
摘要：In this paper, we put forward a new impedance control method of thyristor controlled series capacitor (TCSC) by modifying variable structure PID feedback of firing angle, aiming at improving the transfer capability of remote wind farms. TCSC can get the best results with nonlinear closed-loop control method, but it is very difficult, if not impossible, to be implemented because a huge amount of data is required. The impedance controller with variable structure PID feedback of firing angle is designed as follows: the coefficient of its integral part is equal to zero before or around the moment that measuring impedance reaches the desired impedance first time, meanwhile it's called PD controller; then add the integral part and it becomes PID controller. When TCSC steps from different impedance values to the same, the value of error accumulator changes a little, and so a better approximate control effect is obtained. Digital simulation and dynamic experiment results show that this control method can improve the transfer capability with good dynamic and static performance.