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基于准比例—谐振控制的MMC-HVDC环流抑制策略
引用本文:刘焕,岳伟,张一工,易荣,张海涛,许树楷.基于准比例—谐振控制的MMC-HVDC环流抑制策略[J].电力系统自动化,2015,39(12):146-151.
作者姓名:刘焕  岳伟  张一工  易荣  张海涛  许树楷
作者单位:1. 华北电力大学电气与电子工程学院,北京市,102206
2. 荣信电力电子股份有限公司,辽宁省鞍山市,114051
3. 南方电网科学研究院有限责任公司,广东省广州市,510080
基金项目:国家高技术研究发展计划(863计划)资助项目(2011AA05A102)。
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。

关 键 词:模块化多电平换流器  环流抑制  准比例-谐振控制  两相静止坐标系
收稿时间:5/7/2014 12:00:00 AM
修稿时间:2014/12/26 0:00:00

Circuiting Current Restraining Strategy Based on Quasi Proportional-Resonance Control in MMC-HVDC
LIU Huan,YUE Wei,ZHANG Yigong,YI Rong,ZHANG Haitao and XU Shukai.Circuiting Current Restraining Strategy Based on Quasi Proportional-Resonance Control in MMC-HVDC[J].Automation of Electric Power Systems,2015,39(12):146-151.
Authors:LIU Huan  YUE Wei  ZHANG Yigong  YI Rong  ZHANG Haitao and XU Shukai
Affiliation:School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China,Rongxin Power Electronic Co. Ltd., Anshan 114051, China,School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China,Rongxin Power Electronic Co. Ltd., Anshan 114051, China,Rongxin Power Electronic Co. Ltd., Anshan 114051, China and Electric Power Research Institute, China Southern Power Grid Co. Ltd., Guangzhou 510080, China
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).
Keywords:modular multilevel converter (MMC)  circulating current restraining  quasi proportional-resonance control  static two-phase coordinate
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