基于优化虚拟矢量的三电平逆变器中点电位平衡闭环控制

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (707 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract With the analysis of the problems caused by the diode-clamped inverter’s neutral-point voltage unbalance, including DC capacitor voltage oscillation, power device voltage stress increasing, and output voltage harmonic, a scheme on the closed-loop control of neutral-point voltage balance based on optimized virtual space vector for three-level inverter is proposed in this paper. The model of nearest three virtual-space-vector involved the optimization factors is built to synthesize the reference space vector, which is optimized by the neutral-point voltage real-time feedback to reduce the output voltage harmonic and distortion. The amount of unbalance of neutral-point voltage is introduced to calculate the compensation amount of each optimization in virtual space vector time. Also the online estimation of the load displacement angle is adopted to realize the closed-loop control. The simulation and experimental results show that this scheme has better performance on controlling the neutral-point voltage for multi-level inverters and can reduce the fluctuation of DC-link capacitor effectively.

Key words： Three-level inverter space vector pulse-width modulation(SVPWM) virtual vectors neutral-point voltage balance

Received: 12 April 2013 Published: 13 April 2015

PACS:

TM464

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Fan Bo
	Zhao Weigang
	Liu Gang
	Xie Dongdong

Cite this article:

Fan Bo,Zhao Weigang,Liu Gang等. Closed-Loop Control of Neutral-Point Voltage Balance Based on the Optimized Virtual Space Vector for Three-Level Inverter[J]. Transactions of China Electrotechnical Society, 2015, 30(4): 179-186.

URL:

http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I4/179

[1] 李永东, 肖曦, 高跃. 大容量多电平变换器—原理·控制应用[M]. 北京: 科学出版社, 2005.
[2] Franquelo L G, Prats M A M, Portillo R C, et al. Three dimensional space-vector modulation algorithm for four-leg multilevel converters using abc coor- dinates[J]. IEEE Transactions on Industrial Electronics, 2006, 53(2): 458-466.
[3] 赵辉, 李瑞, 王红君, 等. 60°坐标系下三电平逆变器SVPWM 方法的研究[J]. 中国电机工程学报. 2008, 28(24): 39-45. Zhao Hui, Li Rui, Wang Hongjun, et al. Study on SVPWM method based on 60°coordinate system for three-level inverter[J]. Proceedings of the CSEE, 2008, 28(24): 39-45.
[4] Lewicki A, Krzeminski Z, Abu-Rub H. Space-vector pulsewidth modulation for three-level NPC converter with the neutrai point voltage control[J]. IEEE Transac- tions on Industrial Electronics, 2011, 58(11): 5076- 5086.
[5] Gupta K, Khambadkone A M. A space vector PWM scheme for multilevel inverters based on two-level space vector PWM[J]. IEEE Transactions on Industrial Electronics, 2006, 53(5): 1631-1639.
[6] Nabae A, Takahashi I, Akaja H. A new neutral point- clamped PWM inverter[J]. IEEE Transactions on Industry Application, 1981, 17(5): 518-523.
[7] 姜卫东, 王群京, 史晓锋, 等. 中点钳位型三电平逆变器在空间矢量调制时中点电位的低频振荡[J]. 中国电机工程学报, 2009, 29(3): 49-55. Jiang Weidong, Wang Qunjing, Shi Xiaofeng, et al. Low frequency oscillation of neutral point voltage of neutral-point-clamped three-level VSI under SVPWM control[J]. Proceedings of the CSEE, 2009, 29(3): 49-55.
[8] Maheswari Ramkrishan, Munk-Nielsen S, Busquets- Monge S. Design of neutral-point voltage controller of a three-level NPC inverter with small Dc-link capaci- tors [J]. IEEE Transactions on Industrial Electronics, 2013, 60(5): 1861-1871.
[9] Yazdani A, Iravani R. A new neutral point-clamped PWM inverter[J]. IEEE Transactions on Power Delivery, 2006, 21(1): 414-424.
[10] 宋文祥, 陈国呈, 陈陈. 基于矢量合成的三电平空间电压矢量调制方法[J]. 电工技术学报, 2007, 22(10): 91-96. Song Wenxiang, Chen Guocheng, Chen Chen. A space vector modulation method of three-level NPC inverter based on synthesizing vectors concept[J]. Transactions of China Electrotechnical Society, 2007, 22(10): 91-96.
[11] Pou J, Zaragoza J, Ceballos S, et al. A carrier-based PWM strategy with zero-sequence voltage injection for a three-level neutral-point clamped converter[J]. IEEE Transactions on Power Electronics, 2012, 27(2): 642-651.
[12] Vargas R, Cortes P, Ammann U, et al. Predictive control of a three-phase neutral-point-clamped inverter [J]. IEEE Transactions on Industrial Electronics, 2007, 54(5): 2697-2705.
[13] Busquets-Monge S, Bordonau J, Boroyevich D, et al. The nearest three virtual space vector PWM-A modula- tion for the comprehensive neutral-point balancing in the three-level NPC inverter[J]. IEEE Power Electron. Lett. , 2004, 2(1): 11-15.
[14] Pou J, Zaragoza J, Rodriguez P, et al. Fast-processing modulation strategy for the neutral point-clamped converter with total elimination of low-frequency voltage oscillations in the neutral point[J]. IEEE Transactions on Industrial Electronics, 2007, 54(4): 2276-2287.
[15] Busquets-Monge S, Somavilla S, Bordonau J, et al. Capacitor voltage balance for the neutral-point-clamped converter using the virtual space vector concept with optimized spectral performance[J]. IEEE Transactions on Power Electronics, 2007, 22(4): 1128-1135.
[16] 姜卫东, 杜少武, 史晓峰, 等. 中点箝位型三电平逆变器空间矢量与虚拟空间矢量的混合调制方法[J]. 中国电机工程学报, 2009, 29(18): 47-53. Jiang Weidong, Du Shaowu, Shi Xiaofeng, et al. Hybrid PWM strategy of SVPWM and VSVPWM for neutral point-clamped three-level voltage source inverter[J]. Proceedings of the CSEE, 2009, 29(18): 47-53.
[17] Busquets-Monge S, Bordonau J, Boroyevich D, et al. Output voltage distortion characterization in multilevel PWM converters[J]. IEEE Power Electronics Letters, 2004, 2(1): 24-28.