基于模糊滑模变结构控制的UPFC控制策略的研究  

Research on UPFC Control Strategy Based on Fuzzy Variable Structure

作　　者：张志辉 张健[1] ZHANG Zhi-hui;ZHANG Jian(School of Electrical Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学电气工程学院,辽宁锦州121001

出　　处：《辽宁工业大学学报（自然科学版）》2018年第5期281-285,291,共6页Journal of Liaoning University of Technology(Natural Science Edition)

基　　金：辽宁省自然科学基金项目(2015020104)

摘　　要：针对统一潮流控制器(UPFC)的控制策略做了深入的分析和研究。首先考虑到UPFC在dq坐标系下的数学模型表现为变量多、耦合性强的特征。对UPFC在dq坐标系下的数学模型进行一次αβ坐标变换,实现了UPFC数学模型的解耦。为了削弱变结构控制中的抖振现象,基于UPFC解耦后的数学模型,设计了一种基于模糊趋近律的变结构控制器。此变结构控制器不仅减弱了控制过程中的抖振,而且能够使得UPFC更好的追踪控制指令,实现维持母线电压稳定和补偿输电线路功率的功能。This essay makes a deep research on the control strategy of UPFC. The mathematical model of UPFC is a system with many variables and strong coupling in the dq coordinate. The essay can decouple the model of UPFC in the dq coordinate by adding a transformation from dq transformation to αβ transformation. In order to weaken the chattering phenomenon, the variable structure control theory is applied based on fuzzy reaching law to design the controller of the UPFC. According to the strategy, the UPFC can compensate the power of the grid and maintain the stability of the bus voltage. At the same time, the control system can trace the instruction and weaken the chattering phenomenon.

关 键 词：统一潮流控制器(UPFC) 模糊趋近律 变结构控制 ΑΒ变换 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]