电网不平衡下SMES变流器动态演化控制策略研究  

Dynamic evolution control strategy of SMES converter under unbalanced power grid conditions

作　　者：付伟真 朱英伟[1] 林晓冬 杨浩瀚 Fu Weizhen;Zhu Yingwei;Lin Xiaodong;Yang Haohan(School of Electrical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电气工程学院,成都610065

出　　处：《电测与仪表》2023年第5期66-71,共6页Electrical Measurement & Instrumentation

摘　　要：针对超导磁储能(SMES)变流器在电网电压不平衡下的工作情况,提出一种新型非线性控制策略,即动态演化控制(DEC)。该控制方法相较于传统PI控制能有效地减小SMES因电网电压不平衡而产生的三相电流畸变以及有功、无功功率产生的二次谐波。文中根据电网不平衡下SMES变流器的工作情况设置三个工作目标;建立了基于DEC的不平衡控制方程,并在Simulink中搭建模型进行仿真分析。通过与传统PI控制作对比,DEC控制具有更强的鲁棒性,更快速的响应能力,理论分析和仿真结果验证了该控制策略的可行性和有效性。A novel nonlinear control strategy,the dynamic evolution control(DEC),is proposed for superconducting magnetic energy storage(SMES)converter under unbalanced power grid voltage conditions.Compared with traditional PI control,this control method can effectively reduce the three-phase current distortion and the second harmonic generated by active and reactive power caused by voltage unbalance of SMES.Firstly,three objectives are set according to the working conditions of SMES converter under the unbalanced power grid;secondly,the unbalanced control equation based on DEC is established,and the model is built in Simulink for simulation analysis.Finally,compared with the traditional PI control,DEC control has stronger robustness and faster response ability,the theoretical analysis and simulation results verify the feasibility and effectiveness of the control strategy.

关 键 词：SMES变流器 电网电压不平衡 PI控制 动态演化控制 

分 类 号：TM464[电气工程—电器]