摘要
应用状态空间平均建模法推导出静止无功发生器(SVG)的动态数学模型。基于此模型,采用双变量传统PI控制策略控制SVG系统,发现该控制策略在两个控制目标变量(无功功率和直流侧电压)的动态性能方面存在不足。依据所建立的动态数学模型推导出SVG系统的逆函数,由此进一步得出非线性逆系统-PI控制策略以提高SVG系统无功功率和直流侧电压的动态响应速度。应用PSCAD/EMTDC仿真软件搭建SVG的控制系统模型,仿真结果表明了SVG动态数学模型的正确性和非线性逆系统-PI控制策略的有效性。
The dynamic mathematical model of static var generator （SVG） was carried out by means of state space averaging modeling. Based this model, deficiencies of the dynamic response speed of control variables （reactive power and DC voltage） were observed when conventional bivariate PI control strategy was introduced to control the SVG system. In order to shorten the response time to the reactive power and DC voltage of the system, the nonlinear inverse system-PI control strategies were proposed by using the inverse functions of the SVG system derived from the dynamic mathematical model. The simulation results of SVG control system by PSCAD/EMTDC illustrate the accuracy of the mathematical model and the validity of the control strategies.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第11期3166-3170,共5页
Journal of System Simulation
