基于SOGI的MMC环流抑制方法

兰州理工大学学报 ›› 2021, Vol. 47 ›› Issue (2): 80-86.

• 自动化技术与计算机技术 • 上一篇下一篇

基于SOGI的MMC环流抑制方法

张明光^*1,2,3, 常剑华^1,2,3, 杨城铭^1,2,3, 刘子琳^1,2,3

1.兰州理工大学电气工程与信息工程学院, 甘肃兰州 730050;
2.兰州理工大学甘肃省工业过程先进控制重点实验室, 甘肃兰州 730050;
3.兰州理工大学电气与控制工程国家级实验教学示范中心, 甘肃兰州 730050

收稿日期:2019-12-06 出版日期:2021-04-28 发布日期:2021-05-11
通讯作者: 张明光(1971-),男,甘肃民勤人,教授.Email:zhangmingg8@163.com
基金资助:
国家自然科学基金(51567016)

A modular multilevel converter circulation suppression method based on SOGI

ZHANG Ming-guang^1,2,3, CHANG Jian-hua^1,2,3, YANG Cheng-ming^1,2,3, LIU Zi-lin^1,2,3

1. College of Electrical and Information Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. Key Laboratory of Gansu Advanced Control for Industrial Processes, Lanzhou Univ. of Tech., Lanzhou 730050, China;
3. National Demonstration Center for Experimental Electrical and Control Engineering Education, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2019-12-06 Online:2021-04-28 Published:2021-05-11

摘要/Abstract

摘要： 基于模块化多电平换流器的柔性直流输电(high voltage direct current based on modular multilevel converter,MMC-HVDC)系统在电力领域已经占据重要地位,但MMC系统存在环流,会增加开关器件和其他元件的额定容量以及系统损耗,严重影响了MMC的工作特性.为抑制环流,分析了MMC环流中包含的主要高次谐波,针对其中的二次和四次谐波,首先设计了基于二阶广义积分器(second order generalized integrator,SOGI)的多谐波滤波器来提取环流中的谐波分量,其次设计了基于准比例谐振(PR)的环流抑制器.最后在PSCAD中建立了21电平MMC-HVDC模型进行仿真实验,结果表明,与传统的环流抑制方法作了对比,所提出的方法能更有效地抑制环流.

关键词: 模块化多电平换流器, 环流抑制, 二阶广义积分器, 准比例谐振控制器

Abstract: The high voltage direct current based on modular multilevel converter (MMC-HVDC) has occupied an important position in the power field, but modular multilevel converter has a circulating current, which can increase the rated capacity and system loss of switches and other components, seriously affecting the working characteristics of MMC. In order to suppress the circulation, the main higher harmonics in MMC circulation are analyzed, for the second and fourth harmonics, a multi-harmonic filter based on the second order generalized integrator (SOGI) was first designed to extract the harmonic components in the circulating current, then circulating current suppressing controller based on proportional resonant was designed to suppress harmonic components. Finally, a 21 level MMC-HVDC simulation model is built in PSCAD, and compared with the traditional circulation suppression method, the results show that the proposed method can suppress circulation more effectively.

Key words: circulating current suppression, second order generalized integrator, PR control

中图分类号:

TM72

张明光, 常剑华, 杨城铭, 刘子琳. 基于SOGI的MMC环流抑制方法[J]. 兰州理工大学学报, 2021, 47(2): 80-86.

ZHANG Ming-guang, CHANG Jian-hua, YANG Cheng-ming, LIU Zi-lin. A modular multilevel converter circulation suppression method based on SOGI[J]. Journal of Lanzhou University of Technology, 2021, 47(2): 80-86.

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基于SOGI的MMC环流抑制方法

A modular multilevel converter circulation suppression method based on SOGI

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