基于不同网架结构的直流微电网稳定性分析

doi:10.19595/j.cnki.1000-6753.tces.191846

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Abstract It is not clear whether the DC microgrid system with different grid structures has different stability, which needs to be studied. In order to solve this problem, the small signal models of several typical grid structures are established. Based on the change of participation factors and system characteristic roots, the influence of system parameters on system stability under different grid structures is studied. The results show that the stability of the system under different grid structures is basically the same with only the difference of resonance frequency when the parameters of the controller on the source side are changed alone; when the parameters of the controller on the load side are changed alone, only the oscillation modes related to the load are affected, and the load and the line basically have no interaction; when the parameters of the line are changed alone, due to the interaction between the source network, different systems appear Stability difference. Finally, the correctness of the theoretical analysis is verified by simulation.

Key words： Grid structure small signal model participation factor method root locus stability

Received: 31 December 2019

PACS:

TM712

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	Zhu Xiaorong
	Li Zheng
	Meng Fanqi

Cite this article:

Zhu Xiaorong,Li Zheng,Meng Fanqi. Stability Analysis of DC Microgrid Based on Different Grid Structures[J]. Transactions of China Electrotechnical Society, 2021, 36(1): 166-178.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191846 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I1/166

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