Research on the Hysteresis-band Current Tracking Strategy based on Fault-Tolerant Control for Modular Multilevel Converter
Ji Yu1,Mei Jun1,Lu Yu2,Zheng Jianyong1,Du Xiaozhou1,Ma Tian1,Miao Huiyu1
1. College of Electrical Engineering, Southeast University, Nanjing 210096, China; 2. Nari-Relays Electric Co. Ltd., Nanjing 211100, Jiangsu Province, China
Abstract：Modular Multilevel Converter (MMC) is a novel topology of Voltage Source Converter (VSC). The protection issues of the malfunction of the sub-module are difficult to handle with. With regard to this problem, the fault-tolerant control based hysteresis-band current tracking strategy, which is used for the MMC, is proposed in the paper. The output voltage can be determined by real-time monitoring the voltage of the load and the deviation between the output current and the given current. Thus, the output current can track the given current quickly and efficiently. When the malfunction occurs in the sub-module, which then must be cut off, and the output voltage should be restructured. The upper/lower arm will be protected from overcurrent. The whole system can still be running smoothly before the fault has been repaired. In addition, the voltage of the capacitor in the sub-module can be balanced by loop mapping the constructed virtual sub-module into the actual sub-module. The proposed strategy is simple and reliable for the control of MMC. According to the simulation and experimental results, the correctness and validity of the proposed method are verified.
吉宇,梅军,卢宇,郑建勇,杜晓舟,马天,缪惠宇. 基于电流滞环型调制的模块化多电换器容错策略研究[J]. 电工技术学报, 2015, 30(14): 269-277.
Ji Yu,Mei Jun,Lu Yu,Zheng Jianyong,Du Xiaozhou,Ma Tian,Miao Huiyu. Research on the Hysteresis-band Current Tracking Strategy based on Fault-Tolerant Control for Modular Multilevel Converter. Transactions of China Electrotechnical Society, 2015, 30(14): 269-277.
[1] Lesnicar A, Marquardt R. An innovative modular multilevel converter topology suitable for a wide powerrange[C]. IEEE Power Tech Conference Procee- dings. Bologna, Italy, 2003. [2] Makoto Hagiwara, Kazutoshi Nishimura, Hirofumi Akagi. A Medium-Voltage Motor Drive With a Modular Multilevel PWM Inverter[J]. IEEE Trans on Power Electron, 2010, 25(7): 1786-1799. [3] Simon P Teeuwsen. Modeling the Trans Bay Cable Project as Voltage-Sourced Converter with Modular Multilevel Converter Design[C]. IEEE Power and Energy Society General Meeting, Detroit Michigan, USA, 2011. [4] Antonios Antonopoulos, KalleIlves, LenartÄngquist. on interaction between internal converter dynamics and current control of high-performance high-power AC motor drives with modular multilevel converters [C]. IEEE Energy Conversion Congress and Exposition (ECCE), Atlanta, USA, 2010. [5] H Mohammadi P, M TavakoliBina. A Transformerless Medium-Voltage STATCOM Topology Based on Extended Modular Multilevel Converters[J]. IEEE Trans on Power Electron. 2011, 26(5): 1534 - 1545. [6] 王姗姗, 周孝信, 汤广福, 等. 模块化多电平换流器HVDC直流双极短路子模块过电流分析[J]. 中国电机工程学报, 2011, 31(1): 1-7. Wang Shanshan, Zhou Xiaoxin, Tang Guangfu, et al. modeling of modular multi-level voltage source con- verter[J]. Proceedings of the CSEE, 2011, 31(1): 1-7. [7] Lennart Harnefors, StaanNorrga, Antonios Antono- poulos, et al. Dynamic modeling of modular multilevel converters[C]. Power Electronics and Applications (EPE 2011), Birmingham, UK, 2011. [8] Daniel Siemaszko, Antonios Antonopoulos, KalleIlves, et al. Evaluation of control and modulation methods for modular multilevel converters[C]. Power Electronics Conference (IPEC), Stockholm, Sweden, 2010. [9] K Ilves, A Antonopoulos, S Norrga, et al. A new modulation method for the modular multilevel converter allowing fundamental switching frequency [J]. IEEE Trans on Power Electron, 2012, 27(8): 3482-3494. [10] 李笑倩, 宋强, 刘文华, 等. 采用载波移相调制的模块化多电平换流器电容电压平衡控制[J]. 中国电机工程学报, 2012, 32(9): 49-55. Li Xiaoqian, Song Qiang, Liu Wenhua, et al. Capacitor voltage balancing controlby using carrier phase-shift modulation of modular multilevel converter [J]. Proceedings of the CSEE, 2012, 32(9): 49-55. [11] 赵昕, 赵成勇, 李广凯, 等. 采用载波移相技术的模块化多电平换流器电容电压平衡控制[J]. 中国电机工程学报, 2011, 31(21): 48-55. Zhao Xin, Zhao Chengyong, Li Guangkai, et al. Submodule capacitance voltage balancing of modular multilevel converter based on carrier phase shifted SPWM technique[J]. Proceedings of the CSEE, 2011, 31(21): 48-55. [12] 管敏渊, 徐政, 屠卿瑞, 等. 模块化多电平换流器型直流输电的调制策略[J]. 电力系统自动化, 2010, 34(2): 48-52. Guan Minyuan, Xu Zheng, Tu Qingru, et al. Nearest Level Modulation for Modular Multilevel Converters in HVDC Transmission[J]. Automation of Electric Power Systems, 2010, 34(2): 48-52. [13] 申科, 王建赜, 班明飞, 等. 基于粒子群优化的模块化多电平变换器阶梯波调制策略[J]. 电力自动化设备, 2014, 34(4): 78-89. Shen Ke, Wang Jianze, Ban Mingfei, et al. Staircase modulation scheme based on PSO for modular multilevel converter[J]. Electric Power Automation Equipment, 2014, 34(4): 78-89. [14] 胡鹏飞, 江道灼, 周月宾, 等. 模块化多电平换流器子模块故障冗余容错控制策略[J]. 电力系统自动化, 2013, 37(15): 66-70. Hu Pengfei, Jiang Daozhuo, Zhou Yuebin, et al. Redundancy fault-tolerated controlstrategyfor sub- module faults of modular multilevel converters[J]. Automation of Electric Power Systems, 2013, 37(15): 66-70. [15] 管敏渊, 徐政. 模块化多电平换流器子模块故障特性和冗余保护[J]. 电力系统自动化, 2011, 35(16): 94-104. Guan Minyuan, Xu Zheng. Redundancy protection for sub-module faultsin modular multilevel converter [J]. Automation of Electric Power Systems, 2011, 35(16): 94-104. [16] 李探, 赵成勇, 李路遥, 等. MMC-HVDC子模块故障诊断与就地保护策略[J]. 中国电机工程学报, 2014, 34(16): 1641-1649. Li Tan, Zhao Chengyong, Li Luyao, et al. Sub-module Fault Diagnosis and the Local Protection Scheme for MMC-HVDC System[J]. Proceedings of the CSEE, 2014, 34(16): 1641-1649. [17] 洪峰, 单任仲, 王慧贞, 等. 一种变环宽准恒频电流滞环控制方法[J]. 电工技术学报, 2009, 24(1): 115-119. Hong Feng, Shan Renzhong, Wang Huizhen, et al. A varied hysteresis-band current controllerwith fixed switching frequency[J]. Transactions of China Elec- trotechnical Society, 2009, 24(1): 115-119. [18] 顾和荣, 杨子龙, 邬伟扬. 并网逆变器输出电流滞环跟踪控制技术研究[J]. 中国电机工程学报, 2006, 26(9): 108-112. GuHerong, Yang Zilong, Wu Weiyang. Research on hysteresis-band current tracking control of grid- connected inverter[J]. Proceedings of the CSEE, 2006, 26(9): 108-112. [19] Jun Mei, Bailu Xiao, KeShen. Modular Multilevel Inverter with New ModulationMethod and Its App- lication to Photovoltaic Grid-Connected Generator[J]. IEEE Transactionson PowerElectronics, 2013, 28(11): 5063-5073. [20] M. Guan, Z. Xu. Modeling and control of a modular multilevelconverter-based HVDC system under unbalanced grid conditions[J]. IEEETransactions on Power Electronics, 2012, 27(12): 4858-4867 [21] 连霄壤, 江道灼. 基于模块化多电平的静止无功补偿器障容错控制[J]. 电力系统保护与控制, 2012, 40(16): 83-89. Lian Xiaorang, Jiang Daozhuo. Fault-tolerant design andcontrol of modular multilevel converter-based STATCOM[J]. Power System Protection and Control, 2012, 40(16): 83-89.
2015, Vol. 30 
