电网不平衡条件下模块化多电平变换器控制策略

doi:10.16180/j.cnki.issn1007-7820.2022.01.013

Abstract

Abstract:

When the power grid is in a voltage unbalanced state, a circulating current will be generated inside the MMC. The positive sequence, negative sequence and zero sequence components of double frequency exist in the circulating current, which increases the instability of the system. In view of the problem of MMC double-frequency circulating current suppression under unbalanced power grids, this study proposes a circulating current suppression strategy based on a linear active disturbance rejection controller. According to the instantaneous power theory, the quantitative relationship of the circulating current parameters is derived. On this basis, the circulating current controller based on the linear active disturbance rejection control strategy is designed to suppress the circulating current. Finally, the proposed control strategy is simulated by MATLAB/Simulink software. The simulation results show that the control strategy can effectively restrain the circulation and increase the stability of the system.

Key words: unbalanced grid voltage, MMC, ADRc, circulation, MATLAB/Simulink, double frequency, circulation suppression, simulation model

CLC Number:

TP202

NIU Shuaichen,WANG Fuzhong,HAN Yaofei,HE Guofeng,NIU Yeke. Control Strategy of Modular Multilevel Converter Under Unbalanced Grid Voltage[J].Electronic Science and Technology, 2022, 35(1): 80-86.

Figures/Tables 8

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References 22

[1]	靳艳娇, 赵峰, 刘刚. 基于MMC的柔性直流输电仿真与分析[J]. 华北电力技术, 2017(6):31-36.
	Jin Yanjiao, Zhao Feng, Liu Gang. Modeling and simulation of flexible HVDC based on MMC[J]. North China Electric Power, 2017(6):31-36.
[2]	李玲玲, 鲁修学, 吉海涛, 等. 级联H桥型SVG直流侧电压平衡控制方法[J]. 电工技术学报, 2016, 31(9):1-7.
	Li Lingling, Lu Xiuxue, Ji Haitao, et al. A balancing control method of DC side voltage for cascaded H-bridge static var generator[J]. Transactions of China Electrotechnical Society, 2016, 31(9):1-7.
[3]	Marquardt R, Lesnicar A, Hildinger J. Modulares stromrichterkonzept für netzkupplungsanwendung bei hohen spannungen[C]. Bad Nauheim:ETG-Fachtagung, 2002.
[4]	张浩, 刘欣和, 王先为, 等. 柔性直流输电系统MMC换流阀闭环充电策略[J]. 电力系统保护与控制, 2019, 47(4):134-142.
	Zhang Hao, Liu Xinhe, Wang Xianwei, et al. Closed-loop charging strategy of MMC in flexible DC transmission system[J]. Power System Protection and Control, 2019, 47(4):134-142.
[5]	付子义, 杜田雨. 电压不平衡时基于改进无差拍控制的VSC-HVDC系统[J]. 电子科技, 2020, 33(4):35-41.
	Fu Ziyi, Du Tianyu. VSC-HVDC system with improved deadbeat control when voltage is unbalanced[J]. Electronic Science and Technology, 2020, 33(4):35-41.
[6]	刘振烜, 易映萍, 石伟. 基于VSG的并网逆变器功率控制研究[J]. 电子科技, 2020, 33(10):6-14.
	Liu Zhenxuan, Yi Yingping, Shi Wei. Research on the power control of grid-connected inverter based on VSG[J]. Electronic Science and Technology, 2020, 33(10):6-14.
[7]	李金科, 金新民, 吴学智, 等. 不平衡交流电网模块化多电平变流器特性分析及环流抑制方法[J]. 中国电机工程学报, 2017, 37(12):3535-3544.
	Li Jinke, Jin Xinmin, Wu Xuezhi, et al. Characteristic analysis and a circulating current control method in modular multilevel converters under unbalanced grid conditions[J]. Proceedings of the CSEE, 2017, 37(12):3535-3544.
[8]	邵文权, 王立宝, 程远, 等. MMC子模块均压及相间环流抑制方案研究[J]. 电气传动, 2019, 49(5):67-72.
	Shao Wenquan, Wang Libao, Cheng Yuan, et al. Research on voltage balance of MMC sub-module and phase-to-phase loop suppression scheme[J]. Electric Drive, 2019, 49(5):67-72.
[9]	李宇, 程远, 卫晓辉, 等. 基于准比例谐振控制器的MMC环流抑制策略[J]. 西安工程大学学报, 2020, 34(3):41-47.
	Li Yu, Cheng Yuan, Wei Xiaohui, et al. Modular multilevel converter circulation suppression strategy based on quasi-proportional resonance controller[J]. Journal of Xi'an Polytechnic University, 2020, 34(3):41-47.
[10]	赵庆玉, 余发山, 何国锋, 等. 应用于MMC环流抑制的准PR控制器参数设计[J]. 可再生能源, 2018, 36(1):51-56.
	Zhao Qingyu, Yu Fashan, He Guofeng, et al. Designing of parameters for quasi proportional-resonance controller applying to MMC circulation suppression[J]. Renewable Energy Resources, 2018, 36(1):51-56.
[11]	唐志军. 采用模糊自适应控制的MMC环流抑制策略[J]. 福州大学学报(自然科学版), 2019, 47(5):624-629.
	Tang Zhijun. MMC circulating current suppressing strategy with fuzzy adaptive control[J]. Journal of Fuzhou University(Natural Science Edition), 2019, 47(5):624-629.
[12]	王朝明, 王华广, 王晴. 基于双PI控制器的模块化多电平变换器环流抑制策略[J]. 电网技术, 2014, 38(10):2905-2912.
	Wang Chaoming, Wang Huaguang, Wang Qing. A dual PI controller based strategy to suppress circulating current in modular multilevel converter[J]. Power System Technology, 2014, 38(10):2905-2912.
[13]	宋平岗, 吴继珍, 邹欢. 不平衡电网电压下MMC的比例降阶谐振控制策略[J]. 电测与仪表, 2017, 54(2):38-45.
	Song Pinggang, Wu Jizhen, Zou Huan. Proportional reduced order resonant control strategy for MMC under unbalanced grid voltage conditions[J]. Electrical Measurement & Instrumentation, 2017, 54(2):38-45.
[14]	程启明, 孙伟莎, 程尹曼, 等. 电网电压不平衡下MMC的无源控制策略[J]. 电力自动化设备, 2019, 39(4):78-85.
	Cheng Qiming, Sun Weisha, Cheng Yinman. Passive control strategy of MMC under unbalanced grid voltage[J]. Electric Power Automation Equipment, 2019, 39(4):78-85.
[15]	张瀚超, 匡洪海, 王建辉, 等. 电网不平衡下模块化多电平整流器控制策略[J]. 湖南工业大学学报, 2019, 33(3):46-54.
	Zhang Hanchao, Kuang Honghai, Wang Jianhui, et al. Control strategy of modular multilevel rectifier under an unbalanced grid condition[J]. Journal of Hunan University of Technology, 2019, 33(3):46-54.
[16]	张建坡, 李耐心, 田新成. 电网电压不平衡条件下模块化多电平换流器高压直流输电控制策略[J]. 电工技术学报, 2016, 31(22):205-212.
	Zhang Jianpo, Li Naixin, Tian Xincheng. The control strategies of modular multilevel converter-high voltage direct current transmission under unbalanced grid Voltage conditions[J]. Transactions of China Electrotechnical Society, 2016, 31(22):205-212.
[17]	梁营玉, 张涛, 刘建政, 等. 不平衡电网电压下模块化多电平换流器的环流抑制策略[J]. 电工技术学报, 2016, 31(9):120-128.
	Liang Yingyu, Zhang Tao, Liu Jianzheng, et al. A circulating current suppressing method for modular multilevel converter under unbalanced grid voltage[J]. Transactions of China Electrotechnical Society, 2016, 31(9):120-128.
[18]	Tu Q R, Xu Z, Xu L. Reduced switching-frequency modulation and circulating current suppression for modular multilevel converters[J]. IEEE Transactions on Power Delivery, 2011, 26(3):2009-2017. doi: 10.1109/TPWRD.2011.2115258
[19]	韩京清. 自抗扰控制器及其应用[J]. 控制与决策, 1998, 13(1):3-5.
	Han Jingqing. Auto-disturbances-rejection controller and it's applications[J]. Control and Decision, 1998, 13(1):3-5.
[20]	韩京清. 从PID技术到“自抗扰控制”技术[J]. 控制工程, 2002, 9(3):13-18.
	Han Jingqing. From PID technique to active disturbances rejection control technique[J]. Control Engineering of China, 2002, 9(3):13-18.
[21]	李少龙, 杨晓洁, 李文龙, 等. 基于ADRC的异步电机DTC系统仿真研究[J]. 电子科技, 2018, 31(2):35-39.
	Li Shaolong, Yang Xiaojie, Li Wenlong, et al. Simulation research on DTC system of asynchronous motor based on ADRC[J]. Electronic Science and Technology, 2018, 31(2):35-39.
[22]	Moon J W, Kim C S, Park J W, et al. Circulating current control in MMC under the unbalanced voltage[J]. IEEE Transactions on Power Delivery, 2013, 28(3):1952-1959. doi: 10.1109/TPWRD.2013.2264496

参数	参数值
直流电压/V	800
直流电容/mF	1.88
桥臂电感/mH	5
桥臂电阻/Ω	15
定子电阻R/Ω	2.875
载波频率/kHz	2
K_T	16
b₀	10

Control Strategy of Modular Multilevel Converter Under Unbalanced Grid Voltage

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