基于拉格朗日插值预测的STATCOM无差拍控制  

Simulation of Dead-beat Control of STATCOM Based on Lagrange's Interpolation Current Prediction

作　　者：夏天宇[1] 杨文焕[1] 石俊[1] 夏明豪 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《电子科技》2015年第12期29-31,35,共4页Electronic Science and Technology

摘　　要：为解决在无功变化剧烈的电气环境中,基于PI控制的STATCOM要经过若干工频周期才能完成跟踪,无法补偿剧烈变化的无功电流的问题。在改进传统的无差拍控制离散数学模型,运用STATCOM状态方程的解,建立其离散数学模型,再提出一种基于拉格朗日插值原理的电流预测方法,并进行控制系统的设计。仿真结果表明,基于前述原理的控制系统,能在一个工频周期内实现无功电流的跟踪,适应无功变化剧烈的电气环境。As to resolve the problem of poor performance of STATCOM due to the inefficient performance of PI controller in drastic fluctuating electric environment,a precise discrete mathematical model of the STATCOM is built and a current prediction method originated from Lagrange＇s interpolation is proposed,which attain a high quality prediction of current,consequently resolving control error caused by time-delay due to digital calculation and improving the instantaneity of the current detection,according to the simulation in Matlab.

关 键 词：无差拍控制 拉格朗日插值 电流预测 STATCOM SVPWM 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]