模块化多电平变流器（MMC）用于高压直流输电（HVDC）系统中时,通常采用PI控制方法,但这种策略存在参数选取繁杂、动态性能较差的缺点。为了提高高压直流输电（HVDC）系统的动态性能、简化参数选取,提出背靠背（B2B）型模块化多电平变流器-高压直流输电（MMC-HVDC）系统的Lyapunov控制策略。首先,建立B2B型MMC-HVDC数学模型;然后,设计Lyapunov函数控制策略;其次,在控制部分加入环流抑制、移相载波调制等,以完整地实现系统功能;最后,在Matlab/Simulink平台上验证了Lyapunov控制策略具有参数选择容易、动态性能优良的特点。
Abstract
When modular multilevel converter （MMC） is used in high voltage direct current （HVDC） system, PI control method is usually adopted, but this strategy has the disadvantages of complex parameter selection and poor dynamic performance. In order to improve the dynamic performance of the system and simplify the selection of parameters, this paper proposes a Lyapunov control strategy for the back-to-back （B2B） MMC-HVDC system. Firstly, the mathematical model of B2B MMC-HVDC is established; Secondly, the Lyapunov function control strategy is designed. Next, the circulating current suppression and phase-shift carrier modulation are added in the control part to realize the system function completely. Finally, the Lyapunov control strategy is verified to have the characteristics of easy parameter selection and excellent dynamic performance on Matlab/Simulink platform.
关键词
无源网络 /
模块化多电平换流器 /
高压直流输电 /
Lyapunov控制 /
可再生能源
Key words
passive network /
modular multilevel converter /
high voltage DC transmission /
Lyapunov control /
renewable energy
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基金
国家自然科学基金（61905139）; 上海市电站自动化技术重点实验室项目（13Z2273800）
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