| 引用本文: | 张芳,沈浩明,杨丰瑜.大储能容量超导磁储能系统的拓扑结构及控制策略[J].电力自动化设备,2021,41(10): |
| ZHANG Fang,SHEN Haoming,YANG Fengyu.Topological structure and control strategy of superconducting magnetic energy storage system with large energy storage capacity[J].Electric Power Automation Equipment,2021,41(10): |
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| 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多电平换流器(MMC)的SMES系统拓扑结构，设计了允许多个超导磁体同时接入以成倍数提升系统整体储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。 |
| 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 |
| DOI：10.16081/j.epae.202106012 |
| 分类号:TM761;TM26 |
| 基金项目: |
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| Topological structure and control strategy of superconducting magnetic energy storage system with large energy storage capacity |
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ZHANG Fang, SHEN Haoming, YANG Fengyu
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Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
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| Abstract: |
| 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. |
| Key words: superconducting magnetic energy storage chopper topological structure linear active disturbance rejection control parameter setting |
