A Flexible Control Strategy for Energy Storage Assisting Synchronous Generators

Da WANG; Ying ZHAO; Jiahua NI; Yonghui LING; Ji XIANG; Tingting ZHENG

doi:10.12204/j.issn.1000-7229.2022.06.011

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Electric Power Construction ›› 2022, Vol. 43 ›› Issue (6) : 101-109. DOI: 10.12204/j.issn.1000-7229.2022.06.011

Smart Grid

A Flexible Control Strategy for Energy Storage Assisting Synchronous Generators

Da WANG ¹ ,
Ying ZHAO ¹^,² ,
Jiahua NI ³ ,
Yonghui LING ³ ,
Ji XIANG ³ ,
Tingting ZHENG ¹

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Abstract

Aiming at the problems of the inertia reduction and reactive power regulation deterioration under the large-scale penetration of renewable energy, a flexible control strategy for energy storage assisting synchronous generators is proposed. Meanwhile, the energy storage is configured at the terminal bus of the synchronous generator, and these two measures form a unified power source: a flexible generator whose equivalent inertia, internal impedance, and damping are changeable. Under the proposed control strategy, the energy storage works in the easy-to-implement current source mode, increasing the inertia and damping of the flexible generator, improving the voltage dynamics, and providing targeted reactive power support in the steady-state. Simulation results verify the effectiveness of the proposed strategy.

Key words

energy storage control / inertia enhancement / voltage dynamics / reactive power support

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Da WANG , Ying ZHAO , Jiahua NI , et al . A Flexible Control Strategy for Energy Storage Assisting Synchronous Generators[J]. Electric Power Construction. 2022, 43(6): 101-109 https://doi.org/10.12204/j.issn.1000-7229.2022.06.011

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