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
孙浩 1徐友 1赵涛 1王春霖 1李桂璞1
作者信息
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.
Abstract
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 strate-gy 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 ca-pacitor 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 low-frequency 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 condi-tions.
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Key words
modular multilevel converter/low frequency control/bidirectional DC/DC control/submod-ule capacitor voltage equalization引用本文复制引用
基金项目
国家自然科学基金(62203211)
江苏省研究生科研与实践创新计划(SJCX23_1200)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据