RESEARCH ON MODE SWITCHING TECHNOLOGY OF VOLTAGE-SOURCE CONVERTERS IN ENERGY STATIONS BASED ON OPERATING SHORT-CIRCUIT RATIO

Zhang Zhan; Xiao Huangqing; Liu Wenze; Yi Bin

doi:10.19912/j.0254-0096.tynxb.2024-0469

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (7) : 279-289. DOI: 10.19912/j.0254-0096.tynxb.2024-0469

Special Topics of Academic Papers at the 54th Annual Meeting of the China Association for Science and Technology

RESEARCH ON MODE SWITCHING TECHNOLOGY OF VOLTAGE-SOURCE CONVERTERS IN ENERGY STATIONS BASED ON OPERATING SHORT-CIRCUIT RATIO

Zhang Zhan¹, Xiao Huangqing^1,2, Liu Wenze¹, Yi Bin³

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Abstract

In order to solve the problem that the existing grid-following/grid-forming mode switching scheme of voltage-source converters based on short circuit ratio does not consider the fluctuation of active power and lacks accuracy in the setting of switching boundary, this paper analyzes the influence of the proportion of the grid-forming voltage-source converters’ capacity, the active power and the short circuit ratio on the oscillation characteristics of the station. And then, from the perspective of maintaining the oscillation stability of the station in the low frequency and subsynchronous frequency band, a switching operation scheme based on the operating short-circuit ratio is proposed. The results show that using operation short circuit ratio can select the control mode more reasonably under the condition of low active power. Therefore, the switching frequency decreases, and the stability after disturbance improves.

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new energy / voltage-source converters / electric power system stability / grid-following / grid-forming

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Zhang Zhan, Xiao Huangqing, Liu Wenze, Yi Bin. RESEARCH ON MODE SWITCHING TECHNOLOGY OF VOLTAGE-SOURCE CONVERTERS IN ENERGY STATIONS BASED ON OPERATING SHORT-CIRCUIT RATIO[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 279-289 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0469

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