一种低频储能型MMC子模块电容电压均衡控制策略  

A Capacitor Voltage Equalization Control Strategy for Low-frequency Energy Storage MMC Submodule

作　　者：孙浩 徐友[1] 赵涛[1] 王春霖 李桂璞 SUN Hao;XU You;ZHAO Tao;WANG Chunlin;LI Guipu(Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]南京工程学院,江苏南京211167

出　　处：《机械与电子》2024年第1期26-30,36,共6页Machinery & Electronics

基　　金：国家自然科学基金资助项目(62203211);江苏省研究生科研与实践创新计划(SJCX23_1200)。

摘　　要：针对低频工况下传统MMC子模块电容电压幅值大幅波动的问题,提出一种基于超级电容和双向DC/DC变换器的新型储能MMC低频子模块电容电压均衡控制策略,采用基于子模块整体能量排序算法的双向DC/DC变换器控制超容储能系统,以维持MMC低频工况下子模块的电容电压稳定。通过MATLAB/Simulink对新型储能MMC低频子模块电容电压均衡控制策略进行仿真研究,仿真结果表明,所提控制策略能够有效抑制低频工况下子模块电容电压的波动。Aiming at the problem of large fluctuations in the voltage amplitude of traditional MMC submodules under low-frequency conditions,this paper proposes a new voltage equalization control strategy for energy storage MMC low-frequency submodules based on supercapacitors and bidirectional DC/DC converters,and uses a bidirectional DC/DC converter based on the overall energy sequencing algorithm of the submodules to control the supercapacitance energy storage system to maintain the stability of the capacitor voltage of the submodules under the low-frequency conditions of MMC.In this paper,MATLAB/Simulink is used to simulate the voltage equalization control strategy of the new energy storage MMC lowfrequency submodule,and the simulation results show that the proposed control strategy can effectively suppress the fluctuation of the capacitor voltage of the submodule under low-frequency working conditions.

关 键 词：模块化多电平换流器 低频控制 双向DC/DC控制 子模块电容电压均衡 

分 类 号：TM46[电气工程—电器]