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基于载波的三电平中点电压平衡控制策略

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Keywords: 三电平逆变器,中点电压平衡,载波变幅,SPWM

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Abstract:

中点电压平衡问题是二极管钳位式三电平逆变器的固有问题,本文对此进行了深入探讨,分析了中点电压失衡的原因,从载波的角度研究了载波幅值变化对中点电压的影响,推导出中点电压波动和调制比、调节量、功率因数之间的关系,讨论了调节量、功率因数对中点电压波动的影响,提出了一种基于载波变幅的SPWM调制策略,通过保持调制波不变,改变载波的幅值来实现中点电压平衡控制。最后在基于DSP的二极管钳位型三电平逆变器试验平台上验证了上述调制方案的有效性。

References

[1]  Kouro S, Lezana P, Angulo M, et al. Multicarrier PWM with DC-link ripple feedforward compensation for multilevel inverters[J]. IEEE Transactions on Power Electronics, 2008, 23(1): 52-59.
[2]  Mekhilef S, Kadir M N. Voltage control of three-stage hybrid multilevel inverter using vector transformation [J]. IEEE Transactions on Power Electronics, 2010, 25(10): 2599-2606.
[3]  伍文俊, 钟彦儒, 段博. 三电平整流器弃用中矢量的对称三区电压矢量调制策略[J]. 电工技术学报, 2009, 24(6): 69-76.
[4]  Wu Wenjun, Zhong Yanru, Duan Bo. A symmetrical three-section PWM for three-level rectifier with medium vectors being eliminated[J]. Transactions of China Electrotechnical Society, 2009, 24(6): 69-76.
[5]  Yamanaka K, Hava A M, Kirino H, et al. A novel neutral point potential stabilization technique using the information of output current polarities and voltage vector[J]. IEEE Transactions on Industry Applications, 2002, 38(6): 1572-1580.
[6]  Busquets Monge S, Alepuz S, Rocabert J, et al. Pulse width modulations for the comprehensive capacitor voltage balance of n-level three-leg diode-clamped converters[J]. IEEE Transactions on Power Electronics, 2009, 24(5): 1364-1375.
[7]  Chen Xinbing, He Ligao. Research on neutral point potential balance of three-level inverter based on fuzzy logic control strategy[J]. Transactions of China Electrotechnical Society, 2007, 22(10): 103- 108.
[8]  Patel P J, Patel R A, Patel V, et al. Implementation of self balancing space vector switching modulator for three-level inverter[C]. The Third International Conference on Industrial and Information Systems, Kharagpur, India, 2008: 1-6.
[9]  宋文祥, 陈国呈, 丁肖宇, 等. 基于两类脉宽调制方式本质联系的三电平逆变器中点电压平衡控制的研究[J]. 电工技术学报, 2005, 20(12): 53-58.
[10]  Song Wenxiang, Chen Guocheng, Ding Xiaoyu, et al. Research on neutral-point balancing control for three-level NPC inverter based on correlation between PWM and SVPWM[J]. Transactions of China Electrotechnical Society, 2005, 20(12): 53-58.
[11]  Alonso O, Marroyo L, Sanchis P, et al. Analysis of neutral-point voltage balancing problem in three-level neutral-point-clamped inverters with SVPWM modulation[C]. IEEE 28th Annual Conference of the Industrial Electronics Society, Sevilla, Spain, 2002: 920-925.
[12]  Qiang Song, Wenhua Liu, Qingguang Yu, et al. A neutral-point potential balancing algorithm for three-level NPC inverters using analytically injected zero-sequence voltage[C]. The Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, Miami, USA, 2003: 228-233.
[13]  Celanovic N, Boroyevich D. A comprehensive study of neutral-point voltage balancing problem in three- level neutral-point-clamped voltage source PWM inverters[J]. IEEE Transactions on Power Electronics, 2000, 15(2): 242-249.
[14]  Tallam R M, Naik R, Nondahl T A. A carrier-based PWM scheme for neutral-point voltage balancing in three-level inverters[J]. IEEE Transactions on Industry Applications, 2005, 41(6): 1734-1743.
[15]  陈鑫兵, 何礼高. 基于模糊控制的三电平逆变器中点电位平衡策略[J]. 电工技术学报, 2007, 22(10): 103-108.

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