基于一维空间矢量调制的多电平逆变器共模电压抑制技术研究Common-mode Voltage Suppression Technology of Multilevel Inverter Based on One-dimensional Space Vector Modulation
刘锋;吴学智;赵宇明;刘京斗;张鹏;赵亚雪;王杰;
摘要(Abstract):
多电平逆变器广泛应用于新能源发电、交流传动等领域,而共模电压带来的漏电流不仅会导致光伏并网电流畸变,还存在一定安全问题。针对非隔离型的三相多电平光伏并网逆变器,从理论上分析了不同的三相PWM波相对位置关系可以将共模电压幅值分为0、E/3、2E/3的3种情况。进而提出可实现共模电压幅值分别为0、E/3、2E/3的3种调制策略,并且从并网电流谐波性能、共模漏电流、滤波参数3个方面比较了3种调制方式的综合性能。结果显示,在七电平逆变器中,共模电压幅值为2E/3的调制方法综合性能较好。最后通过仿真和实验对所提方法进行了验证。
关键词(KeyWords): 非隔离;共模电压;一维空间矢量调制;多电平逆变器;漏电流
基金项目(Foundation): 中国南方电网有限责任公司科技项目(090000KK52180104)~~
作者(Author): 刘锋;吴学智;赵宇明;刘京斗;张鹏;赵亚雪;王杰;
Email:
DOI: 10.13335/j.1000-3673.pst.2019.2291
参考文献(References):
- [1]杨秋霞,高金玲,荣雅君,等.单相光伏并网系统共模电流分析[J].电网技术,2011,35(1):180-185.Yang Qiuxia,Gao Jinling,Rong Yajun,et al.Analysis on common mode current of single-phase grid-connected PV system[J].Power System Technology,2011,35(1):180-185(in Chinese).
- [2]袁义生,张伟平,朱本玉,等.新型非隔离光伏并网逆变器拓扑及其共模电流分析[J].电网技术,2014,38(12):3286-3292.Yuan Yisheng,Zhang Weiping,Zhu Benyu,et al.Topology and common mode current analysis of new type transformerless gridconnection inverter for photovoltaic generation system[J].Power System Technology,2014,38(12):3286-3292(in Chinese).
- [3]肖华锋,杨晨,谢少军.NPC三电平并网逆变器共模电流抑制技术研究[J].中国电机工程学报,2010,30(33):23-29.Xiao Huafeng,Yang Chen,Xie Shaojun.NPC three-level gridconnected inverter with leakage Current suppression[J].Proceedings of the CSEE,2010,30(33):23-29(in Chinese).
- [4] Li Wuhua,Gu Yunjie,Luo Haoze,et al.Topology review and derivation methodology of single-phase transformerless photovoltaic inverters for leakage current suppression[J].IEEE Transactions on Industrial Electronics,2015,62(7):4537-4551.
- [5] Tang Yi,Yao Wenli,Loh P C.Highly reliable transformerless photovoltaic inverters with leakage current and pulsating power elimination[J].IEEE Transactions on Industrial Electronics,2016,63(2):1016-1026.
- [6] Chen Wenjie,Yang Xu,Zhang Wei Ping,et al.Leakage current calculation for PV inverter system based on a parasitic capacitor model[J].IEEE Transactions on Power Electronics,2016,31(2):8205-8217.
- [7]王付胜,于世能.级联H桥逆变器漏电流分析与抑制[J].电工技术学报,2017,S2(32):103-110.Wang Fusehng,Yu Shineng.Analysis and suppression of the leakage currents in the cascaded H-bridge inverter[J].Transactions of China Electrotechnical Society,2017,S2(32):103-110(in Chinese).
- [8]郭小强.新型CH5光伏逆变器共模漏电流抑制研究[J].中国电机工程学报,2017,37(23):6988-6994.Guo Xiaoqian. Research on common-mode leakage current suppression for a novel CH5 PV inverter[J].Proceedings of the CSEE,2017,37(23):6988-6994(in Chinese).
- [9]肖华锋,杨晨,谢少军.基于改进型全桥电路的非隔离光伏并网逆变器[J].中国电机工程学报,2011,31(3):40-46.Xiao Huafeng,Yang Chen,Xie Shaojun.A transformerless PV grid-connected inverter based on improved full bridge topology[J].Proceedings of the CSEE,2011,31(3):40-46(in Chinese).
- [10] Siwakoti Y P,Blaabjerg F.Common-ground-type transformerless inverters for single-phase solar photovoltaic systems[J]. IEEE Transactions on Industrial Electronics,2018,65(3):2100-2111.
- [11]郭小强,周佳乐,贾晓瑜,等.三相级联型光伏并网逆变器漏电流抑制研究[J].中国电机工程学报,2019,39(2):594-603.Guo Xiaoqiang,Zhou Jiale,Jia Xiaoyu,et al.Leakage current reduction of three-phase cascaded PV grid-connected inverter[J].Proceedings of the CSEE,2019,39(2):594-603(in Chinese).
- [12]张纯江,贲冰,李建,等.三相非隔离型Heric光伏逆变器漏电流抑制研究[J].电工技术学报,2016,31(17):113-120.Zhang Chunjiang, Ben Bing, Li Jian, et al. Leakage current suppression for three-phase transformerless Heric photovoltaic inverter[J].Transactions of China Electrotechnical Society,2016,31(17):113-120(in Chinese).
- [13]郭小强,贺冉,菅佳敏,等.非隔离型三相四桥臂光伏逆变器漏电流抑制研究[J].电工技术学报,2016,31(19):66-73.Guo Xiaoqiang,He Ran,Jian Jiamin,et al.Leakage current reduction for three-phase four-Leg photovoltaic inverter[J].Transactions of China Electrotechnical Society,2016,31(19):66-73(in Chinese).
- [14]姜艳姝,马洪飞,陈希有,等.一种新颖的用于减小电机终端共模du/dt的逆变输出滤波器[J].电机与控制学报,2002,6(2):123-127.Jiang Yanshu,Ma Hongfei,Chen Xiyou,et al.A novel inverter output filter for reducing motor terminal common-mode du/dt[J].Electric Machines and Control,2002,6(2):123-127(in Chinese).
- [15]张兴,邵章平,王付胜,等.非隔离型三相三电平光伏逆变器的共模电流抑制[J].中国电机工程学报,2013,33(3):29-36.Zhang Xing,Shao Zhangping,Wang Fusheng,et al.Leakage current reduction for transformerless three-phase three-level photovoltaic inverters[J]. Proceedings of the CSEE, 2013, 33(3):29-36(in Chinese).
- [16]戴鹏,吴斌,苏良成,等.基于新型SVPWM的NPC/H桥五电平逆变器共模电压抑制策略研究[J].电机与控制学报,2015,19(2):20-25.Dai Peng,Wu Bin,Su Liangcheng,et al.Reducing common-mode voltage for NPC/H-bridge five-level inverter based on novel SVPWM strategy[J].Electric Machines and Control,2015,19(2):20-25(in Chinese).
- [17]姜卫东,汪正玲,赵勇,等.多电平电压源逆变器降低共模电压的脉宽调制策略的研究[J].电工电能新技术,2018,32(1):36-42.Jiang Weidong,Wang Zhengling,Zhao Yong,et al.PWM algorithm for multi-level voltage source inverter with reduced common mode voltage[J]. Advanced Technology of Electrical Engineering and Energy,2018,32(1):36-42(in Chinese).
- [18]郭小强,朱铁影,魏宝泽,等.飞跨电容多电平光伏逆变器共模电流抑制技术[J].中国电机工程学报,2016,36(18):4962-4969.Guo Xiaoqiang,Zhu Tieying,Wei Baoze,et al.Common mode current suppression technique for flying capacitor multilevel PV Inverter[J].Proceedings of the CSEE,2016,36(18):4962-4969(in Chinese).
- [19]姜艳姝,徐殿国,赵洪,等.多电平SPWM变频器中共模电压抑制技术的研究[J].中国电机工程学报,2005,25(3):18-22.Jiang Yanshu, Xu Dianguo, Zhao Hong, et al. Research on common-mode voltage reduction in multi-level inverter[J].Proceedings of the CSEE,2005,25(3):18-22(in Chinese).
- [20] Abu-Rub H,Holtz J,Rodriguez J,et al.Medium voltage multilevel converters-state of the art,challenges and requirements in industrial applications[J].IEEE Transactions on Industrial Electronics,2010,57(8):2581-2596.
- [21] Rohner S,Bernet S,Hiller M,et al.Modulation,losses,and semiconductor requirements of modular multilevel converters[J].IEEE Transactions on Industrial Electronics,2010,57(8):2633-2642.
- [22]姚刚,李俊刚,周荔丹.单相多电平电流源变流器混合调制与控制技术[J].电网技术,2018,42(4):1300-1307.Yao Gang,Li Jungang,Zhou Lidan.Hybrid modulation and control technology of single phase multilevel current source converter[J].Power System Technology,2018,42(4):1300-1307(in Chinese).
- [23]魏新伟,栗时平,邱欣,等.模块化多电平换流器电容电压新型化平衡方法[J].电网技术,2017,41(3):729-735.Wei Xinwei,Su Shiping,Qiu Xin,et al.A novel optimized capacitor voltage balancing method for modular multilevel converter[J].Power System Technology,2017,41(3):729-735(in Chinese).
- [24] Xiao Huafeng,Xie Shaojun.Leakage current analytical model and application in single-phase transformerless photovoltaic gridconnected inverter[J]. IEEE Transactions on Electromagnetic Compatibillity,2010,52(4):902-913.
- [25] Xuezhi Wu,Yaxue Zhao,Feng Liu,et al.Seven-level inverter with switched capacitors[J].The Journal of Engineering,2019,2019(16):2897-2903.
- [26]刘锋.多电平逆变器一维空间矢量调制技术[D].北京:北京交通大学,2019.
- [27]吴学智,刘锋,刘京斗,等.多电平变换器的一维空间矢量调制技术研究[J].电网技术,2019,43(11):4025-4033.Xuezhi Wu,Liu Feng,Liu Jingdou,et al.Research on onedimensional space vector modulation technology of multilevel converter[J].Power System Technology,2019,43(11):4025-4033(in Chinese).
- [28]国家能源局.NB/T 32004-2013光伏发电并网逆变器技术规范[M].北京:中国电力出版社,2013.
- [29]宋吉峰.LCL并网逆变器的设计与控制研究[D].武汉:华中科技大学,2014.