V01．24 No．2
2009
2009年2月
电工技术学报
TRANSACTl0Ns OFCHINAELEcTROTECHNICALSOCIETY
Feb．
第24卷第2期
微网中分布式电源逆变器的
多环反馈控制策略
王成山 肖朝霞 王守相
(天津大学电力系统仿真控制教育部重点实验室 天津
300072)
摘要 对微网分布式电源逆变器进行了多环反馈控制器的设计与研究。在分析采用闭环控制
的逆变器输出阻抗受线路参数和控制器参数影响的基础上，进行内环电压电流控制器的设计，电
压控制器采用PI控制器稳定负荷电压，采用比例环节的电流控制器提高系统响应速度，并且设计
控制器参数使输出阻抗为感性阻抗。在此基础上利用下垂特性设计外环功率控制器，实现微网内
多逆变单元间的无线通信控制。所设计的多环控制器使微网联网运行时可以输出高质量的电能。
当电网发生故障，微网由联网模式转到孤岛模式，分布式电源将自动调节功率输出，实现功率共
享且不同模式之间的平滑切换。仿真结果证明了控制方案的有效性。
关键词：分布式发电 微网 逆变器 多环反馈控制器
中图分类号：TM464；TM711
Feedback
Control Scheme for Inverters of
Loop
Multiple
the Micro Source in
Microgrids
Xiao Zhaoxia
Wang Chengshan
Wang Shouxiang
300072 China)
(Tianjin University Tianjin
Abstract
A
feedback
on the
control scheme for micro source inverters in
iS
multiple
loop
Microgrid
in this
of
line
the
the inverter
impedance
output
influenced
developed
by
paper．Based
analysis
and the controller
and the current controllers in the
impedance parameters
parameters，the voltage
are
PI
is
to make the load
stable．The current
inner-loop
designed．The
voltage regulator
to
applied
voltage
the
uses the
the
dynamic performance．After
loop
proportional regulator
improve
impedance，the power controller
characteristics to achieve the wireless communication between
output impedance
based on the
produced
is
as an inductance
in the
is
designed
outer-loop
inverters in
Microgrid
droop
paralleled
Microgrid．
can
expoa
With the
of the
feedback
multiple
controller,the
implementation
loop
under the
mode to
mode．When the
fault
runs
Occurs，the
high-quality power
grid—connected
utility
Microgrid
from
the
mode，and
controller will
the active and
grid-connected
islanding
designed
regulate
reactive
Also，the
show the
flow and enable
between the
micro sources in the
power
power sharing
paralleled
Microgrid．
controllercan make the conversion between different modes seamless．The simulation results
of the
scheme。
proposed
validity
feedback
controller
loop
Keywords：Distributed
generation，microgrid，inverter，multiple
教育部科学技术研究重大项目(306004)和国家自然科学基金(50625722)资助项目。
收稿日期2007—06．30改稿日期2007．12．25
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