IMPROVED ACTIVE DISTURBANCE REjECTION CONTROL STRATEGY FOR VARIABLE SPEED PUMPED STORAGE UNIT TO SUPPRESS FREQUENCY FLUCTUATIONS AT DC RECEIVING ENDS

Zhang Jianpo; Chen Xiaoxuan; Jia Jiaoxin

doi:10.19912/j.0254-0096.tynxb.2025-0483

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (7) : 351-364. DOI: 10.19912/j.0254-0096.tynxb.2025-0483

IMPROVED ACTIVE DISTURBANCE REjECTION CONTROL STRATEGY FOR VARIABLE SPEED PUMPED STORAGE UNIT TO SUPPRESS FREQUENCY FLUCTUATIONS AT DC RECEIVING ENDS

Zhang Jianpo, Chen Xiaoxuan, Jia Jiaoxin

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Abstract

With the rapid development of direct current transmission projects and new energy, the frequency regulation and voltage regulation capabilities of the direct current receiving-end power grids have been continuously weakened. The variable speed pumped storage unit （Variable Speed Pumped Storage Unit, VSPS）, as one of the grid frequency regulation and peak shaving technologies, has received extensive attention and application. To address the frequency fluctuations and suppression issues at the direct current receiving end, this paper first elaborates on the frequency regulation mechanism and frequency response model of the VSPS; then, it designs the frequency response link of the VSPS based on active disturbance rejection control, establishes the state equation of active disturbance rejection control, determines the control parameters, and obtains the frequency correction amount of the receiving-end power grid; at the same time, an adaptive tuning strategy for the droop-inertia coefficient is added to the active/frequency coupling link to enhance the frequency fluctuation suppression effect of the power grid. Finally, the simulation results based on the PSCAD/EMTDC platform show that the adaptive control strategy can fully exert the frequency regulation capability of the VSPS, achieve effective support for the grid frequency, and has certain engineering application reference significance.

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high voltage DC transmission / pumped storage power plants / frequency response / active disturbance rejection control / adaptive tuning of parameters

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Zhang Jianpo, Chen Xiaoxuan, Jia Jiaoxin. IMPROVED ACTIVE DISTURBANCE REjECTION CONTROL STRATEGY FOR VARIABLE SPEED PUMPED STORAGE UNIT TO SUPPRESS FREQUENCY FLUCTUATIONS AT DC RECEIVING ENDS[J]. Acta Energiae Solaris Sinica. 2026, 47(7): 351-364 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0483

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