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| Citation:Ju Liu,Dongjun Yang,Wei Yao,等.PV-based virtual synchronous generatorwith variable inertia to enhance powersystem transient stability utilizing theenergy storage system[J].Protection and Control of Modern Power Systems,2017,V2(4):429-437[Copy] |
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| Click: 1636 Download: 689 |
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| PV-based virtual synchronous generatorwith variable inertia to enhance powersystem transient stability utilizing theenergy storage system |
| Ju Liu,Dongjun Yang,Wei Yao,Rengcun Fang,Hongsheng Zhao,Bo Wang |
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| Abstract: |
| The Photovoltaic (PV) plants are significantly different from the conventional synchronous generators in terms of
physical and electrical characteristics, as it connects to the power grid through the voltage-source converters. High
penetration PV in power system will bring several critical challenges to the safe operation of power grid including
transient stability. To address this problem, the paper proposes a control strategy to help the PVs work like a
synchronous generator with variable inertia by energy storage system (ESS). First, the overall control strategy of the
PV-based virtual synchronous generator (PV-VSG) is illustrated. Then the control strategies for the variable inertia of
the PV-VSG are designed to attenuate the transient energy of the power system after the fault. Simulation results of
a simple power system show that the PV-VSG could utilize the energy preserved in the ESS to balance the transient
energy variation of power grid after fault and improve the transient stability of the power system. |
| Key words: Energy storage system, Virtual synchronous generator, Variable inertia, Transient stability, Photovoltaic power |
| DOI：10.1186/s41601-017-0070-0 |
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