基于模型预测控制的统一电能质量调节器  

Unified Power Quality Conditioner Based on Model Predictive Control

作　　者：张旭[1,2] 杨学友[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072 [2]新加坡南洋理工大学电力与电子工程学院,新加坡639798

出　　处：《控制工程》2011年第2期215-218,257,共5页Control Engineering of China

基　　金：863计划(2008AA042407)

摘　　要：随着电力电子器件和装置在电力系统中广泛应用,电网中的非线性负荷不断增加,进而导致谐波畸变大量产生,电能质量问题日益严重。为了改善电网电能质量,提出了基于模型预测控制理论以及卡尔曼滤波方法的统一电能质量调节器的设计。首先介绍了统一电能质量调节器的基本结构和基本原理,并进行建模得到其状态空间模型,然后在此模型基础上,采用卡尔曼滤波方法对系统内部状态进行估计,将模型预测控制策略应用于统一电能质量调节器的控制器设计,最后通过仿真实验检验基于模型预测控制的统一电能质量调节器改善电网电能质量的性能。仿真实验结果表明,基于模型预测控制的统一电能质量调节器,能够补偿谐波、抑制干扰,有效地改善电网电能质量。To improve the power quality, the design of unified power quality conditioner is presented based on model predictive control theory＂ and Kahnan filtering method. The basic structure, the principle and the state-space model of the unified power quality conditioner are int^vduced, Kahnan filtering method is then adopted to estimate the system internal states. The model predictive control strategy is applied into the controller design of unified power quality conditioner. And the simulation studies are proposed to verify the performance of the unified po^4,er quality conditioner based on model predictive control. Tile simulation results show that the unified power quality conditioner based on model predictive control can compensate the harmonics, eliminate the disturbances and improve the power quality effectively.

关 键 词：谐波畸变 统一电能质量调节器 模型预测控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]