摘要
以基于模块化多电平换流器(MMC)的构网型储能系统作为主体研究对象,针对传统的构网型储能系统在电压跌落时易发生过流的问题,提出一种考虑电流限幅的暂态性能优化控制。在低电压工况时,将无功功率设定值切换为实时计算值从而抑制过流现象。在此基础上,提出变励磁惯性系数控制方案,通过在电压跌落故障工况下实时调整励磁惯性系数从而提升无功功率的快速响应能力。最后,利用仿真验证此优化控制策略可有效提升基于MMC的构网型储能系统面对电压跌落时的暂态性能。
A grid-forming energy storage system based on modular multilevel converter(MMC)is taken as the main research object,and a low-voltage ride-through optimization control method considering current limiting is proposed for the traditional grid-forming energy storage system that is prone to overcurrent during voltage dips.In the low-voltage condition,the reactive power setting value is switched to the real-time calculated value to suppress the overcurrent phenomenon.On this basis,a variable excitation inertia coefficient control scheme is proposed to improve the fast response capability of reactive power by adjusting the excitation inertia coefficient in real time under the voltage dip fault condition.Finally,the simulation results show that this optimal control strategy can effectively improve the transient performance of the networked energy storage system based on MMC in the face of voltage sag.
作者
李建林
丁子洋
游洪灏
刘海涛
Li Jianlin;Ding Ziyang;You Honghao;Liu Haitao(National User-Side Energy Storage Innovation Research and Development Center(North China University of Technology),Beijing 100144,China;Jiangsu Collaborative Innovation Center for Smart Distribution Network(Nanjing Institute of Technology),Nanjing 211167,China)
出处
《太阳能学报》
北大核心
2025年第6期152-162,共11页
Acta Energiae Solaris Sinica
基金
北京市自然科学基金(21JC0026)
江苏省配电网智能技术与装备协同创新中心开放基金(XTCX202306)。
关键词
模块化多电平换流器
构网型储能
暂态特性
电流限幅
功率响应
modular multilevel converter
grid-forming energy storage
transient characteristics
current limiting
power response
