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并网逆变器输出电流滞环跟踪控制技术研究
26 9 Vol.26 No.9 May 2006
2006 5 Proceedings of the CSEE ©2006 Chin.Soc.for Elec.Eng.
0258-8013 (2006) 09-0108-05 TM464; TM615 A 470 40
⋅
( 066004)
Research on Hysteresis-band Current Tracking Control of Grid-connected Inverter
GU He-rong, YANG Zi-long, WU Wei-yang
(Yanshan UniversityQinhuangdao 066004, Hebei Province, China)
ABSTRACT: The principle of two-level hysteresis control and
three-level hysteresis control, which are employed in
grid-connected PWM inverter, are dissertated in this paper. A
grid-connected inverter system with novel three-level hysteresis 0
control, which makes frequency doubling, is researched, and
the state-transition control logic is designed. The comparison of
three-level hysteresis control with two-level hysteresis control [1-2]
in the inverter’s efficiency, the ripple of current, switching
frequency is complemented. The results of Pspice simulation [3-6]
and prototype experiment illustrate that three-level hysteresis (
control has the function of frequency-doubling, at the same
)
conditions of current hysteresis width and output current. So the
faster dynamic responsibility in lower switching frequency can
be obtained with the three-level hysteresis control, the
switching-loss of the power devices can be reduced, which is PWM
helpful to improve the efficiency of grid-connected operating. [7-8]
Also, the united power factor of grid-connected curre
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