OPTIMAL CONTROL OF TRANSIENT PERFORMANCE OF GRID-FORMING ENERGY STORAGE SYSTEM BAESD ON MMC

Li Jianlin; Ding Ziyang; You Honghao; Liu Haitao

doi:10.19912/j.0254-0096.tynxb.2024-0184

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (6) : 152-162. DOI: 10.19912/j.0254-0096.tynxb.2024-0184

OPTIMAL CONTROL OF TRANSIENT PERFORMANCE OF GRID-FORMING ENERGY STORAGE SYSTEM BAESD ON MMC

Li Jianlin¹, Ding Ziyang¹, You Honghao¹, Liu Haitao²

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Abstract

A grid-forming energy storage system based on modular multilevel converter （MMC） is taken as the main research object, and a low-voltage ride-through optimization control method considering current limiting is proposed for the traditional grid-forming energy storage system that is prone to overcurrent during voltage dips. In the low-voltage condition, the reactive power setting value is switched to the real-time calculated value to suppress the overcurrent phenomenon. On this basis, a variable excitation inertia coefficient control scheme is proposed to improve the fast response capability of reactive power by adjusting the excitation inertia coefficient in real time under the voltage dip fault condition. Finally, the simulation results show that this optimal control strategy can effectively improve the transient performance of the networked energy storage system based on MMC in the face of voltage sag.

Key words

modular multilevel converter / grid-forming energy storage / transient characteristics / current limiting / power response

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Li Jianlin, Ding Ziyang, You Honghao, Liu Haitao. OPTIMAL CONTROL OF TRANSIENT PERFORMANCE OF GRID-FORMING ENERGY STORAGE SYSTEM BAESD ON MMC[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 152-162 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0184

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