基于MMC的储能型同相供电系统模型及控制策略Modeling and Control Strategy of Energy Storage Co-Phase Power Supply System Based on MMC
陈民武;陈天舒;代先锋;廖红波;
摘要(Abstract):
为解决电气化铁路中的负序问题、电分相问题和再生制动能量回收问题,研究一种储能型同相供电系统。其采用模块化多电平变流器(MMC)作为同相补偿装置,以避免基于级联H桥结构的传统系统中存在的占地大和损耗高等问题,并接入储能装置。在分析主电路工作原理和储能型同相补偿装置工作原理的基础上,建立储能型同相供电系统模型;结合牵引负荷特性划分3种工作模式,包括再生制动、削峰和填谷模式,并以相关国标限值为约束,计算各端口参考电流;提出分层协调控制策略,其中端口电流控制协调不同工作模式间的快速动态切换,荷电状态(SOC)均衡控制提高储能容量利用率。算例结果表明:系统在牵引负荷的不同工况下完成了负序的有效补偿,并且通过SOC均衡控制实现再生制动能量的高效利用;与传统系统采用的储能母线接入方式和SOC均衡控制相比,所提出的系统具有可靠性高和控制简单的优点。
关键词(KeyWords): 组合式同相供电系统;模块化多电平;储能系统;分层协调控制;SOC均衡控制
基金项目(Foundation): 国家自然科学基金资助项目(51877182);; 四川省科技厅项目(22GJHZ0057)
作者(Authors): 陈民武;陈天舒;代先锋;廖红波;
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