基于无源控制理论的准Z源超导磁储能系统
摘要：超导磁储能(superconductivity magnetic energy storage，SMES)系统通过变流器来实现电网与超导磁体的功率交换。但传统的储能变流器存在输出电压范围有限以及桥臂上下开关易受干扰造成直通而损坏的问题。为实现超导磁储能系统的安全稳定运行，提出了基于双向准Z源变流器(quasi-Z source converter，QZSC)的超导磁储能系统，并针对QZSC-SMES系统的非线性、强耦合特点，在QZSC-SMES系统的交流侧变流器和直流侧斩波器采用基于欧拉−拉格朗日(Euler-Lagrange，E-L)模型的无源控制策略。仿真结果验证了所提QZSC-SMES拓扑及其控制策略的有效性：系统可以快速准确跟踪有功无功指令，相比传统PI控制，系统具有更低的并网谐波含量、更好的动态性能和更强的鲁棒性。
Abstract:In superconductivity magnetic energy storage (SMES) system the power exchange between power grid and superconducting magnet is realized by converter, however, traditional energy storage converter exists such defects as limited output voltage range and the switches located at the upper and lower bridge arms are easily interfered so that these switches are damaged due to direct through connection. To implement the secure and stable operation of SMES system, an SMES system based on quasi-Z source converter (QZSC) was proposed, and in allusion to the nonlinear and strong coupling characteristics of QZSC-SMES system, the passive control strategy based on the Euler-Lagrange (EL) model was adopted to the converter at AC side and the chopper at DC side in QZSC-SMES system. The effectiveness of the proposed QZSC-SMES topology and its control strategy is verified by simulation results, that is, the system can quickly and accurately track active and reactive power commands; comparing with traditional PI control, the proposed system possesses lower grid-connected harmonic content, better dynamic performance and stronger robustness.
标题：基于无源控制理论的准Z源超导磁储能系统
英文标题：Quasi-Z Source Superconducting Magnetic Energy Storage System Based on Passive Control Theory
作者：王进武, 雷勇, 刘晖, 何平,
关键词：超导磁储能(SMES), 双向准Z源变流器, 无源控制, 斩波器, 功率控制,
发表日期：2021-09-27
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