第
16
卷第
9
期
2012
年
9
月
电机与控制学报
ELECTRIC MACHINES
AND
CONTROL
Vo
l.
16
No.9
Sep. 2012
基于
H
∞重复控制的三相四桥臂逆变器研究
闰士杰，
冷冰，
杜荷
(东北大学信息科学与工程学院，辽宁沈阳
110819
)
摘
要:为了解决微型电网中，作为功率接口的三相四桥臂逆变器存在输出波形畸变率大，跟踪给
定正弦波慢的问题。在三相四桥臂逆变器解搞成三个羊相逆变器的基础上，提出了一种
H
∞重复
控制策略。首先依据内模控制原理，对每个羊相逆变器建立了包含输出滤波器的逆变器系统模型，
设计了重复控制的电压控制器。;然后基于
H
∞控制原理，加入了稳定补偿器，以保证
H
∞最优性能。
这就使逆变器的输出波形快速跟踪参考正弦泼，逆变器输出电压畸变率明显小于常规控制方法。
仿真和实验结果表明，不论在负载突变等大干扰情况下，还是在负载不平衡或者非线性的情况下，
逆变器都能够保持完好的电压输出特性和良好的动态特性。
关键词:三相四桥臂逆变器;单相逆变器
H
∞重复控制;解辑控制;稳定补偿器
中图分类号
:TM464
文献标志码
:A
文章编号:
1007-449X(2012)0
弘
0039
一
09
Research
00
the three-phase four-Ieg ioverter
based
00
H
∞
repetitive
cootrol
YAN
Shi-jie
,
LENG
Bing
,
DU
Heng
(School
o
fI
nforrnation
and
Engineering
,
Northeastern
University
,
Shenyang
110819 ,
China)
Abstract:
Three-phase four-leg inverter as power interface in micro-grid had problems that the harmonic
distortion of the output voltage was high and the wave tracking of the output voltage was slow. In order
to
solve these problems , an
H
∞
repetitive
control strategy was proposed based on the three-phase four-leg in-
verter being decoupled into three single-phase inverters. Firstly , an inverter system model with an output
filter was established and a voltage controller of repetitive control
was
designed based on internal model
control theory for each single-phase inverte
r. Then according
to
H
∞
control
theory , a stable compensator
was added into system to ensure optimum
H
∞
performance.
This led to inverter output tracking reference
sinusoidal waveform rapidly and a lower hannonic distortion than the conventional control methods. The
results of simulation and experiment show that the inverter voltage output characteristics and dynamic
characteristics are excellent , under conditions of the load varying suddenly and in the case of an imbal-
ance load or nonlinear.
Key
words:
three-phase four-leg inverter; single-phase inverter;
H
∞
repetitive
control; decoupling con-
trol; stable compensator
收稿日期:
2012
-02 -09
基金项目:辽宁省自然科学基金
(20102068
)
你看简介:闰士杰(1
964
一)
，男，博士，副教授，研究方向为电力电子与电力传动、电力交换和新能源发电;
冷
冰(1
987
一)
，男，硕士研究生，研究方向为电力交换和新能源发电;
杜 街
(1981
一)
，男，博士研究生，研究方向为检测技术与自动化装置。
通讯作者:闰士杰
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