引用本文: | 孙黎,胡峰,穆钢.基于改进控制策略的MMC-HVDC运行特性研究[J].电力系统保护与控制,2018,46(9):10-16.[点击复制] |
SUN Li,HU Feng,MU Gang.Investigation of MMC-HVDC operation performance based on improved control strategy[J].Power System Protection and Control,2018,46(9):10-16[点击复制] |
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摘要: |
模块化多电平换流器(MMC)作为一种新型拓扑结构,在高压直流输电系统研究中备受瞩目。但其内部控制系统中,存在抗干扰能力低,输出不稳定等问题。根据上述问题,在原有控制策略的基础上,对系统级控制进行改进。该系统不仅能够实现有功、无功独立控制和直流电压稳定控制,且减小了扰动振荡幅度和故障后恢复时间,有效地改善了系统暂稳态特性。在Matlab/Simulink环境下,搭建改进的MMC-HVDC两端有源系统,对改进前后的控制策略进行对比仿真分析。结果验证了理论的正确性与有效性。 |
关键词: 直流 模块化多电平换流器 控制策略 仿真 运行特性 |
DOI:10.7667/PSPC170605 |
投稿时间:2017-04-25修订日期:2017-06-07 |
基金项目:国家重点研发计划项目资助(2017YFB0902004) |
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Investigation of MMC-HVDC operation performance based on improved control strategy |
SUN Li,HU Feng,MU Gang |
(School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China;School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China) |
Abstract: |
Modular Multilevel Converter (MMC), as a new type of topology, has attracted much attention in the research on HVDC system. However, there are some problems such as low anti-jamming capability and unstable output in their internal control systems. According to these problems, this paper improves the systemic control on the basis of original control strategy. The improved control strategy not only can realize independent control of active power and reactive power as well as stable control of the DC voltage, but also can reduce the oscillation amplitude and cut down the recovery time, as a consequence the transient and steady-state performance are improved efficaciously. This paper establishes MMC-HVDC two AC systems and conducts the contrastive simulation analyses between the improved control strategies and original strategies in the Matlab/Simulink. The results verify the correctness and validity of the theory. This work is supported by the National key research and development program of China (No. 2017YFB0902004). |
Key words: DC MMC control strategy simulation operation performance |