基于混合调制的模块化多电平换流器环流抑制策略

doi:10.16180/j.cnki.issn1007-7820.2021.10.007

Abstract

Abstract:

In order to suppress the second harmonic circulation caused by the unequal sum of the upper and lower bridge arms voltages of each phase when the MMC is running, a circulation suppression strategy combining adaptive notch filter and quasi proportional resonance controller is proposed. The strategy uses adaptive notch filter to extract the second harmonic circulation component, and the tracking of this component without static error is realized through the quasi proportional resonance controller, thus obtaining the required compensation voltage. This strategy combined with the hybrid modulation method can reduce the second harmonic circulation by about 65%, improve the distortion degree of the bridge arm current and elevate the output waveform quality of MMC. Finally, the simulation results verify the effectiveness and feasibility of the proposed scheme.

Key words: MMC, HVDC, hybrid modulation, NLM, second harmonic circulation, adaptive notch filter, quasi proportional resonance controller, capacitor voltage balance

CLC Number:

TN35

SUN Yue,ZENG Guohui,HUANG Bo. Circulation Suppression Strategy of MMC Based on Hybrid Modulation[J].Electronic Science and Technology, 2021, 34(10): 45-50.

Figures/Tables 12

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Table 1

Table 2

Figure 7.

Figure 8.

Figure 9.

Figure 10.

References 19

[1]	刘航, 赵成勇, 周家培, 等. 具备自均压能力的模块化多电平换流器拓扑[J]. 中国电机工程学报, 2017, 37(19):5707-5716.
	Liu Hang, Zhao Chengyong, Zhou Jiapei, et al. Novel topology of modular multilevel converter with voltage self-balancing ability[J]. Proceedings of the CSEE, 2017, 37(19):5707-5716.
[2]	张建坡, 蒋畅, 田新成. 模块化多电平换流器子模块拓扑设计及其控制[J]. 电力自动化设备, 2019, 39(7):78-83.
	Zhang Jianpo, Jiang Chang, Tian Xincheng. Design of sub module topologies and their control for modular multilevel converter[J]. Electric Power Automation Equipment, 2019, 39(7):78-83.
[3]	Debnath S, Qin J C, Bahrani B, et al. Operation, control, and applications of the modular multilevel converter:A review[J]. IEEE Transactions on Power Electronics, 2015, 30(1):37-53. doi: 10.1109/TPEL.63
[4]	徐殿国, 李彬彬, 周少泽. 模块化多电平高压变频技术研究综述[J]. 电工技术学报, 2017, 32(20):104-116.
	Xu Dianguo, Li Binbin, Zhou Shaoze. Overview of the modular multilevel converter based high voltage motor drive[J]. Transactions of China Electrotechnical Society, 2017, 32(20):104-116.
[5]	张浩, 吴金龙, 杨美娟, 等. 模块化多电平换流器新型桥臂环流抑制策略研究[J]. 电力系统保护与控制, 2015(21):73-80.
	Zhang Hao, Wu Jinlong, Yang Meijuan, et al. A novel bridge arm circulating current restraint strategy for modular multilevel converter[J]. Power System Protection and Control, 2015(21):73-80.
[6]	屠卿瑞, 徐政, 管敏渊, 等. 模块化多电平换流器环流抑制控制器设计[J]. 电力系统自动化, 2010, 34(18):57-61.
	Tu Qingrui, Xu Zheng, Guan Minyuan, et al. Design of circulating current suppressing controllers for modular multilevel converter[J]. Automation of Electric Power Systems, 2010, 34(18):57-61.
[7]	康润生, 张锐, 位锋威, 等. 基于NLM策略的模块化多电平换流器研究[J]. 测控技术, 2016, 35(9):70-79.
	Kang Runsheng, Zhang Rui, Wei Fengwei, et al. Research on modular multilevel converters based on NLM strategy[J]. Measurement & Control Technology, 2016, 35(9):70-79.
[8]	Hu P F, Jiang D Z. A level-increased nearest level modulation method for modular multilevel converters[J]. IEEE Transactions on Power Electronics, 2015, 30(4):1836-1842. doi: 10.1109/TPEL.2014.2325875
[9]	Wu D L, Peng L. Characteristics of nearest level modulation method with circulating current control for modular multilevel converter[J]. IET Power Electronics, 2016, 9(2):155-164. doi: 10.1049/pel2.v9.2
[10]	Lin L, Lin Y Z, He Z, et al. Improved nearest-level modulation for a modular multilevel converter with a lower submodule number[J]. IEEE Transactions on Power Electronics, 2016, 31(8):5369-5377. doi: 10.1109/TPEL.2016.2521059
[11]	Li K L, Liao Y, Liu R, et al. An improved nearest-level modulation for modular multi-level converters[J]. International Journal of Power Electronics, 2018, 9(2):150-166. doi: 10.1504/IJPELEC.2018.090720
[12]	Wang Y, Hu C, Ding R Y, et al. A nearest level PWM method for the MMC in DC distribution grids[J]. IEEE Transactions on Power Electronics, 2018, 33(11):9209-9218. doi: 10.1109/TPEL.63
[13]	段铁, 黄焱, 汪洋. 载波同步中数字锁相环的重构设计[J]. 电子科技, 2019, 32(8):41-45.
	Duan Tie, Huang Yan, Wang Yang. Reconfiguration design of digital PLL in carrier synchronous[J]. Electronic Science and Technology, 2019, 32(8):41-45.
[14]	Wang K, Deng Y, Peng H, et al. An improved CPS-PWM scheme based voltage balancing strategy for MMC with fundamental frequency sorting algorithm[J]. IEEE Transactions on Industrial Electronics, 2019, 66(3):2387-2397. doi: 10.1109/TIE.2018.2813963
[15]	公铮, 伍小杰, 王钊, 等. 基于载波移相调制的模块化多电平变换器变频运行控制[J]. 中国电机工程学报, 2015(11):2822-2830.
	Gong Zheng, Wu Xiaojie, Wang Zhao, et al. Variable frequency operation control of modular multilevel converter based on carrier phase-shift modulation[J]. Proceedings of the CSEE, 2015(11):2822-2830.
[16]	Huang M, Zou J L, Ma X K. An improved phase-shifted carrier modulation for modular multilevel converter to suppress the influence of fluctuation of capacitor voltage[J]. IEEE Transactions on Power Electronics, 2016, 31(10):7404-7416.
[17]	Tai B Y, Gao C Z, Liu X D, et al. A novel flexible capacitor voltage control strategy for variable-speed drives with modular multilevel converters[J]. IEEE Transactions on Power Electronics, 2017, 32(1):128-141. doi: 10.1109/TPEL.2016.2535463
[18]	瞿萍, 朱鹏飞. 模块化多电平换流器调制策略研究[J]. 智慧电力, 2016, 44(6):38-41.
	Qu Ping, Zhu Pengfei. Study on MMC regulation policies[J]. Smart Power, 2016, 44(6):38-41.
[19]	刘喜梅, 姜汇溪, 于飞. 模块化多电平换流器常用调制策略的对比分析[J]. 青岛科技大学学报(自然科学版), 2020, 41(1):110-118.
	Liu Ximei, Jiang Huixi, Yu Fei. Comparative analysis of common modulation strategies for modular multilevel converters[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2020, 41(1):110-118.

符号	参数名称	数值
U_dc	直流母线电压/kV	5
L₀	桥臂电感/mH	10
C_SM	子模块电容/μF	500
U_c	子模块电容电压/V	1 000
f₀	基波频率/Hz	50
f₁	混合调制策略载波频率/Hz	2 800
M	调制比	0.9

比较项目	混合调制	NLM	CPS-PWM
输出相电压	8.32	14.28	29.09
输出相电流	3.58	13.85	4.82

Circulation Suppression Strategy of MMC Based on Hybrid Modulation

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 12

References 19

Related Articles 5

Metrics

Comments

Recommended 8

[1]	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.
[2]	ZHANG Jie,ZENG Guohui,HUANG Bo. The Loss Calculation and Analysis of Hybrid Modular Multilevel Converter Considering Sub-Module Balancing Constraint [J]. Electronic Science and Technology, 2021, 34(8): 71-78.
[3]	FU Ziyi,DU Tianyu. VSC-HVDC System with Improved Deadbeat Control when Voltage is Unbalanced [J]. Electronic Science and Technology, 2020, 33(4): 35-42.
[4]	WANG Shuguang, WANG Xudong, ZHENG Busheng. A Novel Approach to the Recognition of FSK/BPSK Hybrid Modulation Radar Signals [J]. , 2016, 29(10): 4-.
[5]	XEI Mengmeng,WANG Yongchao. Narrowband Interference Suppression Based on Complex Adaptive Notch Filter [J]. , 2013, 26(11): 99-.