Analysis and stabilization control of a voltage source controlled wind farm under weak grid conditions

Sang, Shun; Zhang, Chen; Zhang, Jianwen; Shi, Gang; Deng, Fujin

doi:10.1007/s11708-021-0793-5

Cited by 4 publications

(1 citation statement)

References 26 publications

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“…Furthermore, grid damping and impedance characteristics are increased without compromising CV interface dynamic performance under a lower short current ratio (SCR) (Wu et al, 2019). Therefore, the CV resources are thought to be an efficient solution and a significant component in the configuration of 100 percent renewable systems (Wang et al, 2020;Sang et al, 2022). To satisfy the CV interface requirement, renewable resources typically add energy storage equipment into their DC side to counteract energy absorption or release in the dynamic regulation process, i.e., the unpredictability of wind and solar power (Liu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

A Novel Grid-Forming Strategy for Voltage-Source Controlled PV Under Nearly 100% Renewable Electricity

Hu¹,

Jiang²,

et al. 2022

Front. Energy Res.

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The demand for decarbonization calls for nearly 100% renewable electricity rising as the dominant power resource. The foregoing paradigm shifts require proactive voltage and frequency controllers for the converter-based renewable energy. This article proposed a novel grid-forming technique for voltage-source controlled photovoltaic (PV) operating in 100% renewable power systems. The proposed idea was to design a DC voltage collapse-prevention controller in conjunction with a simplified frequency and inertia controller, thereby smart capturing and releasing PV energy to achieve improvements in dynamic performance and efficiency. By setting the two-phase operation scheme, the model initiatively considers the conflict between frequency regulation and maximum power point tracking (MPPT) curve control. The preferred controls are validated using extensive simulation and experimental findings based on a semi-physical platform and a practical photovoltaic demonstration project. The proposed controller outperforms the standard PV current controller over a much larger range of weak grid situations, according to the experimental and engineering operational data. Results demonstrated the effectiveness of the presented method in applying to the future 100% renewable power system.

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