STUDY ON TRANSIENT OVERVOLTAGE OPTIMIZATION STRATEGY OF DC CLUSTER IN SENDING-END GRID CONSIDERING MULTI-ENERGY MATCHING

Niu Shuanbao; Cui Wei; Zhang Wenchao; Wang Ying; Huang Minghui; Wang Cong

doi:10.19912/j.0254-0096.tynxb.2023-1992

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (4) : 103-113. DOI: 10.19912/j.0254-0096.tynxb.2023-1992

STUDY ON TRANSIENT OVERVOLTAGE OPTIMIZATION STRATEGY OF DC CLUSTER IN SENDING-END GRID CONSIDERING MULTI-ENERGY MATCHING

Niu Shuanbao¹, Cui Wei², Zhang Wenchao³, Wang Ying², Huang Minghui³, Wang Cong²

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Abstract

Aiming at the problem that the DC cluster is easily affected by transient overvoltage when DC fault occurs in the DC cluster access system with large-scale wind power and photovoltaic power generation resources, a transient overvoltage optimization strategy of DC cluster in sending-end grid considering multi-energy matching is studied in this paper. Firstly, based on the simplified equivalent system of the sending-end grid, the transient overvoltage variation characteristics of the sending-end grid under large-scale DC cluster access are analyzed, and the transient overvoltage model of the DC cluster is established. Secondly, the transient overvoltage model of DC cluster is partially modified considering that multi-energy equipment is connected to the near end of DC cluster. Then, taking the transient overvoltage at the proximal end of the DC cluster and the adjustment cost of multi-energy supporting equipment at the proximal end of the DC cluster as the optimization objectives, the transient overvoltage optimization model of the sending-end grid is established. Combined with neural network algorithm and genetic algorithm, the optimal solution algorithm for the transient overvoltage of the sending-end grid is proposed. Finally, based on the operation data of DC transmission channel in a certain region in northwest China, a simulation model is built to analyze the system transient overvoltage under DC fault. The results show that the model established in this paper has a significant effect on the suppression of transient overvoltage of DC cluster output bus.

Key words

transient overvoltage / sending-end grid / DC cluster / multi-energy matching / neural network

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Niu Shuanbao, Cui Wei, Zhang Wenchao, Wang Ying, Huang Minghui, Wang Cong. STUDY ON TRANSIENT OVERVOLTAGE OPTIMIZATION STRATEGY OF DC CLUSTER IN SENDING-END GRID CONSIDERING MULTI-ENERGY MATCHING[J]. Acta Energiae Solaris Sinica. 2025, 46(4): 103-113 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1992

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