基于电压空间矢量的STATCOM直接电流控制新方法  

New direct current control method for STATCOM based on voltage space vector

作　　者：史丽萍[1] 李佳佳[1] 马艳红[1] 蔡儒军[1] 刘鹏[1] 罗朋[1] 谢钊文 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电工电能新技术》2015年第12期19-24,30,共7页Advanced Technology of Electrical Engineering and Energy

基　　金：高等学校博士学科点专项科研基金(20110095110014)资助项目

摘　　要：为使STATCOM在低开关频率下仍具有较高的补偿精度和较快的响应速度,本文分析了低压STATCOM电压空间矢量调制的基本原理和等效误差电压的约束条件,提出一种改进的双闭环控制策略。电流环采用基于电压空间矢量的双滞环控制方法,滞环外环作用于暂态,以提高STATCOM的补偿精度和响应速度,滞环内环作用于稳态,以降低开关器件的开关频率;主控制器采用对系统参数变化不敏感的内模控制器,进一步提高STATCOM的补偿精度。实验结果表明,该方法在系统稳态时能准确跟踪指令电流的变化,不会造成跟踪松弛,开关频率低;在暂态时,能快速响应系统负载的变化,补偿精度高。In order to ensure the low switching frequency and high compensation precision and fast response for the low voltage STATCOM,the paper analysed the constraint conditions of equivalent error voltage and basic principle of low voltage STATCOM voltage space vector and internal model controller,and then proposed an improved double loop control method. A double hysteresis current control method based on voltage space vector is used in the current loop. The hysteresis inner loop was used to transient state to improve the compensation precision and response speed. The hysteresis outer loop was used to the steady state reducing the switching frequency. An internal model controller was used for main controller which was not sensitive to the change of system parameters. The experiment showed that this method can accurately track the order current in the system steady state and can respond quickly to changes in the system load during the transient condition.

关 键 词：低压STATCOM 内模控制器 双滞环电流控制 电压空间矢量 

分 类 号：TM74[电气工程—电力系统及自动化]