摘要
随着可再生能源渗透率的不断提高,微电网离网运行时的频率稳定性问题日益突出。建设在偏远地区的含同步发电机的微电网,存在因机组数量少或容量低而无法支撑电网稳定运行的问题,可以向微电网中接入基于虚拟同步发电机(VSG)控制的构网型储能,以提升系统频率稳定性。首先建立构网型储能的数学模型,向系统引入虚拟转动惯量与虚拟阻尼系数,重点分析调频系数与惯性参数的协同作用。基于MATLAB/Simulink平台搭建包含同步发电机、储能变流器及负荷的微网系统仿真模型并构建实验室动态模拟平台,通过理论分析和仿真实验明确系统控制参数,分别在接入传统跟网型储能和接入构网型储能两种工况下进行动态模拟实验。结果表明,面对相同的负载扰动,接入基于虚拟同步发电机控制的构网型储能,可以进一步提升微电网系统的频率稳定性,缓解功率冲击。
With the continuous increase in the penetration rate of renewable energy,the issue of frequency stability of microgrids during off-grid operation has become increasingly prominent.For microgrids equipped with synchronous generators constructed in remote areas,there exists a problem that they cannot support the stable operation of the power grid due to the small number or low capacity of units.To solve this problem,grid-forming energy storage based on virtual synchronous generator(VSG)control can be integrated into the microgrid to improve the system frequency stability.First,a mathematical model of grid-forming energy storage is established,virtual rotational inertia and virtual damping coefficient are introduced into the system,and the synergistic effect of frequency regulation coefficients and inertia parameters is focused on analyzing.A simulation model of a microgrid system including synchronous generators,energy storage converters and loads is built based on the MATLAB/Simulink platform,and a laboratory dynamic simulation platform is constructed.The system control parameters are determined through theoretical analysis and simulation experiments,and dynamic simulation experiments are carried out under two operating conditions:integrating traditional grid-following energy storage and integrating grid-forming energy storage.The results show that,in the face of the same load disturbance,the integration of grid-forming energy storage based on VSG control can further enhance the frequency stability of the microgrid system and alleviate power impact.
作者
强丹丹
李伟伟
戴新晨
张学广
Qiang Dandan;Li Weiwei;Dai Xinchen;Zhang Xueguang(School of Automation,Nanjing University of Information Science and Technology,Nanjing Jiangsu 210005;School of Automation,Wuxi University,Wuxi Jiangsu 214000;School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin Heilongjiang 150001)
出处
《中外能源》
2026年第2期36-43,共8页
Sino-Global Energy
基金
国家自然科学基金项目“电压源型双馈风电机组并网振荡机理与抑制方法研究”(编号:51977046)
无锡学院引进人才科研启动专项“三电平变换器高性能调制研究”(编号:2022r021)。
关键词
构网型储能
虚拟同步发电机
微电网
频率稳定性
虚拟转动惯量
虚拟阻尼系数
grid-forming energy storage
virtual synchronous generator(VSG)
microgrid
frequency stability
virtual rotational inertia
virtual damping coefficient
