大储能容量超导磁储能系统的拓扑结构及控制策略  

Topological structure and control strategy of superconducting magnetic energy storage system with large energy storage capacity

作　　者：张芳[1] 沈浩明 杨丰瑜 ZHANG Fang;SHEN Haoming;YANG Fengyu(Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学智能电网教育部重点实验室,天津300072

出　　处：《电力自动化设备》2021年第10期146-155,共10页Electric Power Automation Equipment

摘　　要：随着可再生能源规模化发展,电网对大功率等级储能系统的需求日益增长,因此研究应用于大功率等级场合的超导磁储能(SMES)系统拓扑结构及运行控制策略具有重要的理论意义。提出了一种基于模块化能容量的新型斩波器。该新型斩波器采用模块化设计,由多个子模块串联构成,可随MMC扩展至多种电压等级和功率等级,且能够均衡各子模块的电容电压和磁体电流。针对新型斩波器的旁路子模块数量难以确定的问题,提出了新型斩波器旁路子模块数量的计算方法。基于线性自抗扰控制设计了MMC双闭环控制器和新型斩波器的直流电压控制器,利用复频域分析法整定了线性自抗扰控制器参数。通过仿真验证了所提拓扑结构和控制策略的正确性和有效性。With the large-scale development of renewable energy,the demand of power grid for high-power level energy storage system is increasing.Therefore,it is of great theoretical significance to study the topological structure and operation control strategy of SMES(Superconducting Magnetic Energy Storage)system applied to high-power level situations.A topological structure of SMES system based on MMC(Modular Multilevel Converter)is proposed,and a new-type chopper that allows multiple superconducting magnets to be connected simultaneously to increase the energy storage capacity of the system by multiples is designed.The new-type chopper adopts modular design and consists of multiple sub-modules connected in series,which can be expanded to multiple voltage levels and power levels with MMC,and can balance the capacitor voltage and magnet current of each sub-module.Considering that it is difficult to determine the number of bypass sub-modules in the new-type chopper,a method for calculating the number of bypass sub-modules is proposed.Based on LADRC(Linear Active Disturbance Rejection Control),the dual closed-loop controller of MMC and the DC voltage controller of new-type chopper are designed,and the parameters of LADRC controllers are set by complex frequency-domain analyzing method.The correctness and effectiveness of the proposed topological structure and control strategy are verified by simulation.

关 键 词：超导磁储能 斩波器 拓扑结构 线性自抗扰控制 参数整定 

分 类 号：TM761[电气工程—电力系统及自动化] TM26[一般工业技术—材料科学与工程]