Grid-connected/islanded control and output voltage harmonic suppression strategy for onboard power supply converters

被引：0
|
作者：
Wang Y. [1 ]
Wen Y. [2 ]
Deng J. [3 ]
Peng Y. [1 ]
Lü Y. [1 ]
Qian Z. [1 ]
机构：
[1] CRRC Zhuzhou Institute Co., Ltd., Zhuzhou
[2] School of Traffic & Transportation Engineering, Central South University, Changsha
[3] Shanghai CRRC Hange Marine & Offshore Engineering Co., Ltd., Shanghai
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2021年 / 41卷 / 08期
关键词：
Control mode switching; Grid-connected/islanded control; Harmonic suppression; Onboard power supply converter; Reduced order generalized integrator; Seamless transfer;
D O I：
10.16081/j.epae.202105001
中图分类号：
学科分类号：
摘要：
Firstly, the current-voltage control mode switching method according to grid-connected/islanded status of onboard power supply converters is proposed, which realizes the fast response of output voltage under grid-islanded condition and the controlled transfer of interactive power with onshore AC grid under grid-connected condition. Secondly, the amplitude & frequency regulation based presynchronization control and the voltage and current double closed-loop control share one proportional-integral regulator, which gua-rantees the smooth transition of the integral quantity when control mode switching and realizes the seamless transfer of grid-connected/islanded control. Thirdly, the method of multiple ROGIs(Reduced Order Genera-lized Integrators) in parallel is introduced to suppress the voltage unbalance as well as 5th and 7th harmonics, and the control parameters of ROGI are designed directly in discrete domain to avoid the controller performance deviation caused by digitalization. Finally, the experimental platform for power supply converter of onboard DC-grid electric propulsion system is constructed to verify the correctness and effectiveness of the proposed control method. © 2021, Electric Power Automation Equipment Press. All right reserved.
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页码：161 / 168
页数：7
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