基于精细分区控制的三电平逆变器中点电位平衡策略

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摘要针对中点钳位型(NPC)三电平逆变器中点电位波动问题,在三矢量四状态合成方法的基础上,提出一种精细分区控制的中点电位平衡策略。在低调制度下,对占空比分配因子进行限幅,尽量控制中点电流为零。在高调制度下,通过对比最值电流法和分配因子法分区结果的不同,将工作区域划分为可控区域(CI)、不可控区域(UI)和存疑区域(DI),并对DI区域按中点电流控制效果进行归属判定,在不增加开关频率的情况下,尽可能将中点电流的绝对值控制为最小,实现减小中点电位波动的目的。仿真和实验结果验证了所提策略在降低开关频率的同时,可有效抑制中点电位的波动。

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	王慧敏
	温坤鹏
	张云
	夏长亮

关键词 ：中点钳位型三电平逆变器, 中点电位平衡, 三矢量四状态调制, 精细分区控制

Abstract：To solve the problem of neutral point potential fluctuation of neutral point clamped (NPC) three-level inverter,a meticulous partition control strategy is proposed based on the three vectors and four states synthetic method.In the low modulation degree,the amplitude of the duty cycle distribution factor is limited in order to eliminate the neutral point current.In the high modulation degree,through analyzing the judgment difference between extreme current value method and distribution factor method,the working area is divided to controllable interval (CI),uncontrollable interval (UI),and doubtful interval (DI).The adscription of DI is analyzed based on the control effect of the neutral point current,which minimize the neutral point current without increasing the operating frequency.By these,the neutral point potential fluctuation can be decreased with a low switching frequency,which is verified by the results of the simulations and experiments.

Key words： NPC three-level inverter neutral point potential balance three vectors and four states modulation meticulous partition control

收稿日期: 2015-01-09 出版日期: 2015-10-21

PACS:

TM464

基金资助:国家自然科学基金(51207104)和天津市高等学校科技发展基金计划项目(20140414)资助

作者简介: :王慧敏女,1983年生,博士,讲师,研究方向为电机系统及其控制。(通信作者)温坤鹏男,1989年生,硕士研究生,研究方向为电机系统及其控制。

引用本文:

王慧敏,温坤鹏,张云,夏长亮. 基于精细分区控制的三电平逆变器中点电位平衡策略[J]. 电工技术学报, 2015, 30(19): 144-150. Wang Huimin, Wen Kunpeng, Zhang Yun, Xia Changliang. Neutral Point Potential Balance Strategy for NPC Three-level Inverter Based on Meticulous Partition Control. Transactions of China Electrotechnical Society, 2015, 30(19): 144-150.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I19/144

[1] 张紫凡.CRH2型动车组牵引变流器的建模仿真与控制策略研究[D].北京:华北电力大学,2013.
[2] Rodriguez J,Bernet S,Steimer P K,et al.A survey on neutral-point-clamped inverters[J].IEEE Transactions on Industrial Electronics,2010,57(7):2219-2230.
[3] 王兆宇,艾芊.三电平逆变器空间矢量调制及中点电压控制[J].电力系统保护与控制,2011,39(20):131-136.
Wang Zhaoyu,Ai Qian.Space vector modulation for three-level inverter and neutral point potential control[J].Power System Protection and Control,2011,39(20):131-136.
[4] Pou J,Pindado R,Boroyevich D,et al.Evaluation of the low-frequency neutral-point voltage oscillations in the three-level inverter[J].IEEE Transactions on Industrial Electronics,2005,52(6):1582-1588.
[5] 姜卫东,王群京,史晓锋,等.中点箝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.
[6] Beig A R,Narayanan G,Ranganathan V T.Modified SVPWM algorithm for three level VSI with synchronized and symmetrical waveforms[J].IEEE Transactions on Industrial Electronics,2007,54(1):486-494.
[7] 谢路耀,金新民,吴学智,等.基于零序注入的NPC三电平变流器中点电位反馈控制[J].电工技术学报,2012,27(12):117-128.
Xie Luyao,Jin Xinmin,Wu Xuezhi,et al.Neutral point voltage feedback control based on zero sequence injection for NPC three-level converter[J].Transactions of China Electrotechnical Society,2012,27(12):117-128.
[8] 张伦健,谭国俊,陈利萍.基于双调制波技术的三电平Z源逆变器中点电位平衡控制[J].电力系统保护与控制,2013,41(7):91-96.
Zhang Lunjian,Tan Guojun,Chen Liping.Neutral-point potential balance control for three-level Z-source inverters based on double modulation wave technique[J].Power System Protection and Control,2013,41(7):91-96.
[9] Zhang J,Yokoyama R,She J.Neutral-point voltage control for a three-level DC-AC inverter using equivalent-input-disturbance approach[J].Power System Protection and Control,2013,41(1):183-189.
[10]孟庆云,马伟明,孙驰,等.考虑二极管非理想特性的中点钳位三电平电路的分析[J].电工技术学报,2010,25(6):40-46,54.
Meng Qingyun,Ma Weiming,Sun Chi,et al.The NPC three-level circuit considering nonideal characteristic of diode[J].Transactions of China Electrotechnical Society,2010,25(6):40-46,54.
[11]Shen J,Schroder S,Rosner R,et al.A comprehensive study of neutral-point self-balancing effect in neutral-point-clamped three-level inverters[J].IEEE Transactions on Power Electronics,2011,26(11):3084-3095.
[12]Xia C,Shao H,Zhang Y,et al.Adjustable proportional hybrid SVPWM strategy for neutral-point-clamped three-level inverters[J].IEEE Transactions on Industrial Electronics,2013,60(10):4234-4242.
[13]Jiao Yang,Lee F C,Lu Sizhao.Space vector modulation for 3-level NPC converter with neutral voltage balancing and switching loss/noise reduction[C].Twenty-Ninth Annual IEEE Applied Power Electronics Conference and Exposition (APEC),Fort Worth,TX,2014:1780-1787.
[14]周京华,贾斌,章小卫,等.混合式三电平中点电位平衡控制策略[J].中国电机工程学报,2013,33(24):82-89.
Zhou Jinghua,Jia Bin,Zhang Xiaowei,et al.A hybrid three-level neutral-point balance control strategy[J].Proceedings of the CSEE,2013,33(24):82-89.
[15]Orfanoudakis G I,Yuratich M A,Sharkh S M.Nearest-vector modulation strategies with minimum amplitude of low-frequency neutral-point voltage oscillations for the neutral-point-clamped converter[J].IEEE Transactions on Power Electronics,2013,28(10):4485-4499.
[16]张志,谢运祥,乐江源,等.消除中点电位低频振荡的三电平逆变器空间矢量脉宽调制方法[J].电工技术学报,2011,26(3):103-109.
Zhang Zhi,Xie Yunxiang,Le Jiangyuan,et al.SVPWM method of removing the low-frequency oscillations of neutral point voltage for three-level NPC inverter[J].Transactions of China Electrotechnical Society,2011,26(3):103-109.