PV-based virtual synchronous generator with variable inertia to enhance power system transient stability utilizing the energy storage system

Protection and Control of Modern Power Systems

Bo Wang¹  Ju Liu¹  Dongjun Yang¹  Hongsheng Zhao¹  Rengcun Fang¹  Wei Yao² 

[1] State Grid Hubei Economic Research Institute;State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology;

关键词: Energy storage system;    Virtual synchronous generator;    Variable inertia;    Transient stability;    Photovoltaic power;   

DOI  :  10.1186/s41601-017-0070-0

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown