考虑恒功率负荷特性的直流微电网分级稳定控制策略

doi:10.19595/j.cnki.1000-6753.tces.181565

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Abstract The stability research of DC micro grid mainly focuses on the controller design of all components, and lacks adequate analysis at the system level. With the high proportion penetration of constant power load, the negative resistance characteristic cannot be ignored. Therefore, this paper established an equivalent model of large capacity DC micro grid system with droop control suitable for parallel connection of multiple energy storage converters, and discussed the stability of the system. Considering the nonlinearity of the system, this paper firstly determined the stability of the system equilibrium point. Secondly, the influence of constant power load and system parameters on the stability of the system was analyzed, and the load carrying capacity of the system under different system parameters was quantified and verified by simulation. Finally, a hierarchical stability control strategy was designed according to the results of theoretical analysis, including three aspects: initial parameter selection, virtual resistance adjustment and load adjustment. The simulation and experimental verification were carried out.

Key words： DC micro grid constant power load droop control hierarchical stability control

Received: 26 September 2018 Published: 02 September 2019

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TM712

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	Xie Wenqiang
	Han Minxiao
	Yan Wenli
	Wang Chao
	Yuan Dong

Cite this article:

Xie Wenqiang,Han Minxiao,Yan Wenli等. Hierarchical Stability Control Strategy of DC Micro-Grid Considering Constant Power Load Performance[J]. Transactions of China Electrotechnical Society, 2019, 34(16): 3430-3443.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181565 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I16/3430

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