Microgrid Optical Storage Charge and Discharge Control Technology Based on Adaptive Virtual Synchronous Generator

Zhiyu SHEN; Yili LIU; Bowen ZHENG; Yingwei QI; Jiaojie LI

doi:10.16513/j.2096-2185.DE.2106564

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Distributed Energy ›› 2021, Vol. 6 ›› Issue (5) : 18-25. DOI: 10.16513/j.2096-2185.DE.2106564

Basic Research

Microgrid Optical Storage Charge and Discharge Control Technology Based on Adaptive Virtual Synchronous Generator

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Abstract

Aiming at the problems of grid frequency fluctuations and power oscillations caused by inertia and insufficient damping in the microgrid power generation system combined with solar storage, a kind of solar storage adaptive virtual synchronous generator (virtual synchronous generator, VSG) grid-connected control technology was proposed. On the basis of studying the influence of the state of charge (SOC) of the energy storage battery on the inertial power, the influence of the charging and discharging power of the battery on the working characteristics of the VSG was analyzed, and maximum power point tracking (MPPT) was performed on the photovoltaic side. Through the adjustment of the inertia and damping parameters in the VSG, a three-phase optical storage system considering the charging and discharging of the energy storage battery and the adaptive control of the VSG was established. The research results show that the control strategy can effectively improve the frequency stability and response speed of the optical storage microgrid system, restrain power oscillation, and have the ability of one-time frequency modulation. Finally, the effectiveness of the strategy was verified by simulation.

Key words

solar power storage / virtual synchronous generator(VSG) / adaptive / state of charge(SOC) / charge and discharge control

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Zhiyu SHEN , Yili LIU , Bowen ZHENG , et al . Microgrid Optical Storage Charge and Discharge Control Technology Based on Adaptive Virtual Synchronous Generator[J]. Distributed Energy Resources. 2021, 6(5): 18-25 https://doi.org/10.16513/j.2096-2185.DE.2106564

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