基于准比例-谐振控制的MMC-HVDC环流抑制策略

LIU Huan

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基于准比例-谐振控制的MMC-HVDC环流抑制策略

更新时间：2025-08-13

- 基于准比例-谐振控制的MMC-HVDC环流抑制策略
- Automation of Electric Power Systems Vol. 39, Issue 12, Pages: 146-151(2015)
- 作者机构：
  
  华北电力大学电气与电子工程学院,北京市,102206
- 作者简介：
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- Published：2015
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LIU Huan. [J]. Automation of electric power systems, 2015, 39(12): 146-151.
DOI：

LIU Huan. [J]. Automation of electric power systems, 2015, 39(12): 146-151. DOI：

摘要

模块化多电平换流器型高压直流输电(MMC-HVDC)系统三相桥臂之间存在的环流分量

直接影响系统工作特性

增加系统损耗。根据桥臂电流中含有二倍频分量的特性

构建了两相静止坐标系下模块化多电平换流器(MMC)的环流数学模型。为实现正弦输入的无差跟踪

设计了准比例-谐振(PR)控制器实现框图

并基于准PR控制器设计了环流抑制控制策略。相对于旋转坐标系下的环流抑制控制器

所提控制策略无须引入耦合便可实现解耦控制

减小了参数调节工作量

同时无须进行旋转坐标变换

减小了延时

提高了响应速度。最后

在PSCAD／EMTDC中搭建仿真模型

验证了基于准PR控制的环流抑制策略的有效性。

Abstract

The circuiting current existing among three legs of modular multilevel converter based high voltage direct current (MMC-HVDC) directly influences system performance and increases loss. According to arm-current containing second harmonic frequency

a modular multilevel converter (MMC) circulation mathematical model under static two-phase coordinate is developed. In order to realize zero-error tracking of sinusoidal input

the quasi proportional-resonance (PR) controller realizing block diagram is designed

and a circulating current restraining control strategy based on quasi PR is designed. Relative to the circulating current restraining controller in the rotating reference frame

this strategy is able to realize decoupling control without applying feed forward

thus reducing parameters adjustment workload. And without coordinate transform

delay is decreased and response speed is improved. Finally

a simulation model of MMC is built with PSCAD/EMTDC simulation platform

the results verifying the effectiveness of the circulating current restraining control strategy based on quasi PR. This work is supported by National High Technology Research and Development Program of China (863 Program) (No. 2011AA05A102).

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