摘要
利用虚拟同步发电机(VSG)技术,针对光储并网系统逆变部分的控制策略进行研究。建立了VSG方案下的光伏并网逆变器数学模型,提出了一种基于VSG的光储并网系统的离/并网平滑切换控制策略。针对一个实际的光储并网系统,设计了一台100 kVA的样机,通过RT-LAB半实物仿真实验验证了所提控制策略的有效性。结果表明,所提控制技术在离网模式下具有较好的自适应能力,并网模式下具有良好的功率跟踪性能;能够提供惯性和阻尼,提高系统稳定性;实现柔性光储并网系统不同运行模式之间的平滑切换。
The inverter of optical storage grid-tied system is controlled as virtual synchronous generator（VSG）,whose full control scheme is comprehensively investigated.Firstly,based on the VSG,the mathematical model of photovohaic grid-tied inverter is built and seamless transform strategy of islanded and grid-tied mode is proposed.A 100 kVA prototype is designed for a practical optical storage grid connected system,and the effectiveness of the proposed control strategy is verified by RT-LAB simulation experiment.The results show that the proposed control technology has good adaptive ability under the islanded mode and good tracking performance of power under grid-tied mode, and can provide significant inertia and damping to the utility.Furthermore, it has seamless transform between different modes.
作者
余豪杰
陈旭东
陈兵
沈施炜
YU Hao-jie;CHEN Xu-dong;CHEN Bing;SHEN Shi-wei(State Grid Jiangsu Electric Power Research Institute, Nanjing 210003, China)
出处
《电力电子技术》
CSCD
北大核心
2018年第4期31-34,37,共5页
Power Electronics
基金
国网公司科技项目(NY71-16-045)~~
关键词
虚拟同步发电机
柔性光储系统
平滑切换
virtual synchronous generator
flexible optical storage system
seamless transform
