Asynchronous Startup of the Paralleled DC-DC Converters in DC Microgrid Based on the Injected Frequency

被引：1
|
作者：
Zhuang, Xuzhou [1 ]
Zhang, Qinjin [1 ]
Liu, Yancheng [1 ]
Zhu, Pengli [1 ]
Zeng, Yuji [1 ]
机构：
[1] Dalian Maritime Univ, Marine Engn Coll, Dalian, Peoples R China
来源：
2021 5TH INTERNATIONAL CONFERENCE ON GREEN ENERGY AND APPLICATIONS (ICGEA 2021) | 2021年
关键词：
injected frequency; DC-DC converter; current sharing; asynchronous startup; DC microgrid;
D O I：
10.1109/ICGEA51694.2021.9487597
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The droop control of DC-DC converters based on injected AC voltage small-signal realizes current sharing control without communication, but DC-DC converter startup fails when AC voltage amplitude, frequency and phase do not meet sufficient conditions. In order to improve the success rate of the DC-DC converter connected to the DC bus, an asynchronous startup strategy based on phase difference is proposed. The AC and DC voltage conditions of the DC-DC converter connected to the microgrid under the injected frequency droop control are analyzed, and the control function of the circuit breaker is designed by using the voltage signals on both sides of the circuit breaker. The small-signal model is used to analyze the frequency convergence characteristics of AC voltage under the asynchronous startup strategy. The hardware in the loop experiment based on Starsim shows that the asynchronous startup method based on phase difference can realize the smooth connection between the DC-DC converter and DC bus, and improve the dynamic performance of the connection process.
引用
收藏
页码：63 / 68
页数：6
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