电力系统交直流潮流的全纯嵌入计算

doi:10.19595/j.cnki.1000-6753.tces.201306

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Abstract In order to address the initial value selection and large calculation amount when Newton Raphson(NR) method is used to calculate AC-DC power flow, this paper proposes a holomorphic embedding method for AC-DC power flow calculation. Firstly, according to the construction principle of holomorphic function, the holomorphic AC-DC power flow model and converter station control model are constructed by embedding parameters. Then, based on the Taylor series expansion characteristics of the holomorphic function, the problem of solving nonlinear power flow equations is transformed into an explicit problem of implicit holomorphic functions. Moreover, according to the principle that the same power coefficient is equal, the power series coefficient of Taylor series expansion term is obtained, and the explicit holomorphic function is completed, and then the embedded parameters are assigned to realize the fast solution of AC-DC power flow. Finally, it is analyzed and verified through modified IEEE 5 node AC-DC system, RTS-96 AC-DC system and Polish power grid 3012wp AC-DC test system. The results show that the proposed method can quickly and accurately calculate the power flow of AC-DC power system without relying on the initial value, and has strong robustness, which provides a new idea for power flow calculation of large-scale AC-DC power grid.

Key words： AC-DC hybrid system voltage source converter holomorphic function power flow calculation

Received: 29 September 2020

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TM744

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	Jiang Tao
	Zhang Yong
	Li Xue
	Li Guoqing
	Chen Houhe

Cite this article:

Jiang Tao,Zhang Yong,Li Xue等. A Holomorphic Embedded Method for Solving Power Flow in Hybrid AC-DC Power System[J]. Transactions of China Electrotechnical Society, 2021, 36(21): 4429-4443.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.201306 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I21/4429

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