基于三次谐波电流注入的AAMC电容电压均衡策略

Abstract
Figure/Table
References
Related Citation (7)

Download: PDF (549 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The topology and operation mechanism of a new alternate-arm multilevel converter (AAMC) are described. This topology has two key parts, i.e., director switches made of insulated gate bipolar transistors(IGBTs) in series and wave shaping circuits containing stacks of full bridge sub-modules(SMs). It offers some attractive features such as small amount of SMs, without circulating current, and DC blocking capacity, etc. However, voltage balancing among the SM capacitors is one of crucial problems in the AAMC. To solve it, a voltage balancing strategy based on third harmonic injection is proposed in this paper. The specific process is devided into two steps. Frstly, an energy feedback path is created between the star-point of the converter transformer and the mid-point of the DC-link spilt capacitors; then, an open-loop controller is designed to control the injection current to make sure the whole energy of the wave shaping circuits keep balance. Secondly, a modified phase-shifted carrier-based PWM is poposed to redistribute the energy within SMs. In this method, the switching amount is calculated according to the modulation wave and reference wave, and then the trigger pulses for specified modules are generated based on the polarity of the arm current and the sort results of capacitor voltages. The model of the AAMC with 10 SMs per arm is realized by PSCAD/EMTDC, and simulation results verify the effectiveness of the proposed strategy.

Key words： Alternate-arm multilevel converter third harmonic current injection energy balancing modified phase-shifted carrier-based PWM sub-module capacitor voltage balancing control

Received: 12 January 2012 Published: 25 March 2014

PACS:

TM721.1

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Xue Yinglin
	Xu Zheng
	Wang Feng

Cite this article:

Xue Yinglin,Xu Zheng,Wang Feng. Capacitor Voltage Balancing Strategy Base on Third Harmonic Current Injection for the Alternate-Arm Multilevel Converter[J]. Transactions of China Electrotechnical Society, 2013, 28(9): 104-111.

URL:

http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I9/104

[1] Trainer D R, Critchley D R, et al. A new hybrid voltage-sourced converter for HVDC power transmission[C]. CIGRE Session, Paris, France: CIGRE 2010.
[2] Davidson C C, Trainer D R. Innovative concepts for hybrid multi-level converter for HVDC power transmission[C]. 9th Institution of Engineering and Technology. International Conference on AC and DC Power Transmission, 19-21 October 2010, London, UK: Curran Associates, Inc., 2010.
[3] Flourentzou N, Agelidis V G, Demetriades G D, et al. VSC-based HVDC power transmission systems: an overview[J]. IEEE Transactions on Power Electronics, 2009, 24(3): 592-602.
[4] Hagiwara M, Akagi H. Control and experiment of pulsewidth-modulated modular multilevel converters[J]. IEEE Transactions on Power Electronics, 2009, 24(7): 1737-1746.
[5] 徐政, 陈海荣. 电压源换流器型直流输电技术综述[J]. 高电压技术, 2007, 33(1): 1-10.
Xu Zheng, Chen Hairong. Review and application of VSC HVDC[J]. High Voltage Engineering, 2007, 33(1): 1-10.
[6] Adam G, Ahmed K, Singh N, et al. H-bridge modular multilevel converter (M2C) for high-voltage applications[C]. 21st International Conference on Electricity Distribution, 6-9 June 2011, Frankfurt, German.
[7] Adam G P, Finney S J, Williams B W, et al. Network fault tolerant voltage-source-converters for high-voltage applications[C]. 9th Institution of Engineering and Technology International Conference on AC and DC Power Transmission, London, UK: Curran Associates, Inc., 2010.
[8] Merlin M M C, Green T C, Mitcheson P D, et al. A new hybrid multi-level voltage-source converter with dc fault blocking capability[C]. 9th Institution of Engineering and Technology International Conference on AC and DC Power Transmission, 19-21 October 2010, London, UK: Curran Associates, Inc., 2010.
[9] Cross A M, Trainer D R, Crookes R W. Chain-link based HVDC voltage source converter using current injection[C]. 9th Institution of Engineering and Technology International Conference on AC and DC Power Transmission, 19-21 October 2010, London, UK: Curran Associates, Inc., 2010.
[10] 徐政, 屠卿瑞, 裘鹏. 从2010国际大电网会议看直流输电技术的发展方向[J]. 高电压技术, 2010, 36(12): 1321-1328.
Xu Zheng, Tu Qingrui, Qiu Peng. New trends in HVDC technology viewed through CIGRE 2010[J]. High Voltage Engineering, 2010, 36(12): 1321-1328.
[11] Lesnicar A Neuartiger. Modularer Mehrpunktu- mrichter M2C für Netzkupplungsanwendungen, Elektrotechnik und Informationstechnik[D]. Doktor München: Bundeswehr München, 2008.
[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 Qingrui, et al. Nearest level modulation for modular multilevel converters in HVDC transmission[J]. Automation of Electric Power Systems, 2010, 34(2): 48-52.
[13] 李强, 贺之渊, 汤广福, 等. 新型模块化多电平换流器空间矢量脉宽调制方法[J]. 电力系统自动化, 2010, 34(22): 75-79.
Li Qiang, He Zhiyuan, Tang Guangfu, et al. A Space-vector PWM method for a new type modular multilevel converter[J]. Automation of Electric Power Systems, 2010, 34(22): 75-79.
[14] 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]. Proccedings of the CSEE, 2011, 31(21): 48-55.
[15] Tu Qingrui, Xu Zheng, Xu Lie. Reduced switching- frequency modulation and circulationg current suppression for modular multilevel converter[J]. IEEE Transactions on Power Delivery, 2011, 26(3): 2009-2017.