摘要
为了抑制光伏发电的随机性和波动性的影响,提高微电网的供电可靠性,对离网工况下的微电网黑启动方案进行分析,并将其与虚拟同步发电机(Virtual Synchronous Generator,VSG)控制策略一起应用于储能变流器中,建立了储能变流器的VSG数学模型,推导了小信号模型表达式,通过在光储微电网系统引入惯性和阻尼,提高了系统电压和频率的稳定性。最后,在Matlab/Simulink仿真平台上搭建模型,验证了零起升压策略的有效性,确保了黑启动过程中线路电压的稳定;并在并网工况下分析了光储微电网系统各个微源之间的协调控制,验证了构网型光储变流器控制策略的有效性。
To suppress the effects of the randomness and volatility of photovoltaic power generation and improve the reliability of microgrid power supply,author analyzes the microgrid black start scheme under off⁃grid,which is applied to the energy storage converter together with the VSG control strategy.The VSG mathematical model of the energy storage converter is established and the small signal model is derived.By introducing inertia and damping into the photovoltaic storage microgrid system,the stability of the system voltage and frequency is improved.Finally,the model is built on Matlab/Simulink simulation platform to verify the effectiveness of the zero⁃start boosting strategy and ensure the stability of the line voltage during the black start.The coordinated control between various micro sources in the optical storage microgrid system is studied under grid connected conditions,and the effectiveness of the control strategy of the grid⁃configured photovoltaic storage converter is verified.
作者
温春雪
毛健
王鹏
李建林
WEN Chunxue;MAO Jian;WANG Peng;LI Jianlin(Beijing Future Technology Innovation Centre for Electrochemical Energy Storage System Integration(North China University of Technology),Beijing 100144,China)
出处
《内蒙古电力技术》
2024年第1期1-8,共8页
Inner Mongolia Electric Power
基金
国家自然科学基金面上项目“基于级联型多电平变换器的贯通式同相供电系统关键控制策略研究”(51777002)
国家重点研发计划子课题“电力电子设备多模块互联运行控制与故障自愈技术研究”(2018YFB1503005.02)。
关键词
虚拟同步发电机
光储变流器
光储系统
黑启动
小信号模型
构网型
VSG
optical storage converters
photovoltaic storage system
black start
small signal model
grid⁃configured type
