ACTIVE VOLTAGE SUPPORT COORDINATION CONTROL STRATEGY BETWEEN NEW ENERGY FIELD STATIONS UNDER FAILURE

Wang Yezhengwu; Ji Liang; Chang Xiao; Fan Rui; Li Huipeng; Hong Qiteng

doi:10.19912/j.0254-0096.tynxb.2022-1400

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (12) : 560-567. DOI: 10.19912/j.0254-0096.tynxb.2022-1400

ACTIVE VOLTAGE SUPPORT COORDINATION CONTROL STRATEGY BETWEEN NEW ENERGY FIELD STATIONS UNDER FAILURE

Wang Yezhengwu¹, Ji Liang¹, Chang Xiao², Fan Rui², Li Huipeng², Hong Qiteng³

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Abstract

To address the operational risks such as voltage dips and current crossing limits that may occur in inverter-type new energy field stations when asymmetric faults occur in the grid, this paper proposes an inter-station coordination control strategy for voltage dip scenarios, which can effectively realize the active voltage support of multiple new energy sites to the Point of Common Coupling （PCC） under fault. Firstly, based on the output characteristics of the inverter control system, the voltage support principle under asymmetric fault is analyzed. Secondly, in order to solve the configuration problem of the output current among the new energy sites, Beluga Whale Optimization （BWO） algorithm is introduced to optimize the power of the sites, and the corresponding reference current is derived on this basis. Finally, the voltage dip scenarios are distinguished, and different reference currents are injected by the inverters in the respective scenarios to realize multiple control objectives such as voltage support, current limiting, and improvement of unbalance at the parallel network. The grid-connected operation system with inverter-based new energy field stations is built in Matlab/Simulink simulation platform, and the system simulation results verify the effectiveness of the proposed control strategy.

Key words

new energy / voltage support / unbalance degree / coordinate control strategy / power optimization / scene differentiation

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Wang Yezhengwu, Ji Liang, Chang Xiao, Fan Rui, Li Huipeng, Hong Qiteng. ACTIVE VOLTAGE SUPPORT COORDINATION CONTROL STRATEGY BETWEEN NEW ENERGY FIELD STATIONS UNDER FAILURE[J]. Acta Energiae Solaris Sinica. 2023, 44(12): 560-567 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1400

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