一种低输入电流总谐波畸变率的三相Buck整流器不对称调制策略

doi:10.19595/j.cnki.1000-6753.tces.230074

Abstract
Figure/Table
References
Related Citation (2)

Download: PDF (3934 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The input current total harmonic distortion (THD) is an important performance indicator of a three-phase Buck rectifier, closely related to the modulation strategy. When calculating the dwell time of the vector in the previous research on space vector pulse-width modulation (SVPWM), the ripple of the DC-link current was ignored, i.e., it was considered a constant value. However, in practical applications, to improve dynamic performance and power density, the output inductor of the three-phase Buck rectifier takes a small value, which leads to a large DC-link current ripple. In this case, the impact of the DC-link current ripple on the input current becomes obvious. Secondly, the input current of the three-phase Buck rectifier with the conventional SVPWM modulation strategies has severe distortion during the sector transition. Therefore, this paper proposes a low input current THD modulation strategy, which considers the influence of DC-link current ripple on the input current quality and eliminates the input current distortion during the sector transition. Therefore, the input current THD is effectively reduced.
The impact of the DC-link current ripple on the input current is analyzed in this paper. Firstly, based on the operating states of the three-phase Buck rectifier in sector 1, the relationship between the input current of the three-phase bridge arm and the DC-link current is obtained. Secondly, the relationship between the input average equivalent current amplitude of the three-phase bridge legs is analyzed for different modulation strategies. Then, the amplitude relation between the input voltage and the corresponding input current is obtained. When the ripple of the DC-link current is large, the results show that the ratio of the three-phase input current to the corresponding input voltage is not equal to the conventional asymmetric modulation, which leads to a high harmonic content in the input current. For the conventional symmetric modulation, the ratio of the three-phase input current to the corresponding input voltage is equal, which means that the harmonic content of the input current is lower than the conventional asymmetric modulation.
In addition, the paper also analyzes the reason for the input current distortion during the sector transition of the conventional SVPWM modulation strategies. The relation between the three-phase input current and dc-link inductor current is given, the input inductor current of each vector is deduced, and the transition process of drive signals with different modulation strategies during the sector transition is given. The analysis shows that the input current of the conventional SVPWM modulation strategies has distortion during the sector transition.
A low input current THD modulation strategy is proposed. In this modulation scheme, the influence of the output inductor current ripple on the input current is considered, and the input current distortion during the sector transition is eliminated. The simulation results show that among the three modulations, the input current THD of the conventional asymmetric modulation is the highest (4.9%), and the input current THD of the conventional symmetric modulation is lower (2.3%) than that of the conventional asymmetric modulation. The input current THD of the proposed low input current THD modulation strategy is only 1.7% at half load and 1.2% at full load, respectively, which is the lowest among the three modulation strategies.

Key words： Three phase Buck rectifier ripple of the DC-link current input current distortion asymmetric modulation strategy

Received: 18 January 2023

PACS:

TM461

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Cao Haibin
	Xu Jianping
	Xie Fei
	Zhou Chenli
	Chen Xin

Cite this article:

Cao Haibin,Xu Jianping,Xie Fei等. An Asymmetric Modulation Strategy for Three-Phase Buck Rectifier with Low Input Current Total Harmonic Distortion[J]. Transactions of China Electrotechnical Society, 2024, 39(8): 2541-2552.

URL:

https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.230074 OR https://dgjsxb.ces-transaction.com/EN/Y2024/V39/I8/2541

[1] 秦海鸿, 张鑫, 朱梓悦, 等. 电流型PWM整流器叠流时间对网侧电流影响及其抑制方法[J]. 电工技术学报, 2016, 31(12): 142-152.
Qin Haihong, Zhang Xin, Zhu Ziyue, et al.Influence of overlap time on the AC grid current of current source PWM rectifier and restraining method[J]. Transactions of China Electrotechnical Society, 2016, 31(12): 142-152.
[2] 郭强, 刘和平, 彭东林, 等. 静止坐标系下电流型PWM整流器电流环控制策略研究及其参数设计[J]. 中国电机工程学报, 2014, 34(15): 2353-2361.
Guo Qiang, Liu Heping, Peng Donglin, et al.A novel control strategy and its parameter design of the current-loop in a stationary frame for current-source PWM rectifiers[J]. Proceedings of the CSEE, 2014, 34(15): 2353-2361.
[3] 易永仙, 张宇, 李民英, 等. 电流源型PWM整流器带容性负载的解耦控制方法[J]. 电工技术学报, 2016, 31(4): 95-103.
Yi Yongxian, Zhang Yu, Li Minying, et al.Decoupling control method of current-source PWM rectifier with capacitive load[J]. Transactions of China Electro- technical Society, 2016, 31(4): 95-103.
[4] 张强, 吴延飞, 张保顺, 等. 基于三相电流型五电平整流器的空间矢量脉宽调制算法[J]. 电工技术学报, 2020, 35(24): 5134-5141.
Zhang Qiang, Wu Yanfei, Zhang Baoshun, et al.Space vector pulse width modulation strategy based on three-phase five-level current source rectifier[J]. Transactions of China Electrotechnical Society, 2020, 35(24): 5134-5141.
[5] Kolar J W. Friedli T.The essence of three-phase PFC rectifier systems-part Ⅰ[J]. IEEE Transactions on Power Electronics, 2013, 28(1): 176-198.
[6] Liu Pengcheng, Wang Zheng, Xu Yang, et al.Optimal overlap-time distribution of space vector modulation for current-source rectifier[J]. IEEE Transactions on Industrial Electronics, 2021, 68(6): 4586-4597
[7] Benzaquen J, Fateh F, Shadmand M B, et al.Per- formance comparison of active rectifier control schemes in more electric aircraft applications[J]. IEEE Transactions on Transportation Electrification, 2019, 5(4): 1470-1479.
[8] Chen Qiang, Xu Jianping, Tao Zhuangyi, et al.Analysis of sector update delay and its effect on digital control three-phase six-switch Buck PFC converters with wide AC input frequency[J]. IEEE Transactions on Power Electronics, 2021, 36(1): 931-946.
[9] Lei Jiaxing, Feng Shuang, Zhao Jianfeng, et al.An improved three-phase Buck rectifier topology with reduced voltage stress on transistors[J]. IEEE Transactions on Power Electronics, 2020, 35(3): 2458-2466.
[10] 郭强, 刘和平, 彭东林, 等. 一种考虑电池自身特性的电流源型充电系统[J]. 电工技术学报, 2016, 31(16): 16-25.
Guo Qiang, Liu Heping, Peng Donglin, et al.A current-source charging system considering the characteristics of battery[J]. Transactions of China Electrotechnical Society, 2016, 31(16): 16-25.
[11] Xu Fan, Guo Ben, Tolbert L M, et al.An all-SiC three-phase Buck rectifier for high-efficiency data center power supplies[J]. IEEE Transactions on Industry Applications, 2013, 49(6): 2662-2673.
[12] Xu Fan, Guo Ben, Xu Zhuxian, et al.Paralleled three-phase current-source rectifiers for high- efficiency power supply applications[J]. IEEE Transa- ctions on Industry Applications, 2015, 51(3): 2388-2397.
[13] 郭强, 刘和平, 彭东林, 等. 电流型PWM整流器多环控制策略及其参数设计[J]. 中国电机工程学报, 2015, 35(5): 1193-1202.
Guo Qiang, Liu Heping, Peng Donglin, et al.Multi loop control strategy and parameter design of current source PWM rectifier[J]. Proceedings of the CSEE, 2015, 35(5): 1193-1202.
[14] 郭强, 周琛力, 李山. 面向电流源型PWM整流器直流侧电压的多环路控制策略[J]. 电工技术学报, 2022, 37(8): 2051-2063.
Guo Qiang, Zhou Chenli, Li Shan.A multiple loops control strategy based on DC link voltage of current source PWM rectifiers[J]. Transactions of China Electrotechnical Society, 2022, 37(8): 2051-2063.
[15] Chen Qiang, Xu Jianping, Huang Rui, et al.A digital control strategy with simple transfer matrix for three-phase Buck rectifier under unbalanced AC input conditions[J]. IEEE Transactions on Power Elec- tronics, 2021, 36(4): 3661-3666.
[16] Chen Qiang, Xu Jianping, Wang Lei, et al.Analysis and improvement of the effect of distributed parasitic capacitance on high-frequency high-density three- phase Buck rectifier[J]. IEEE Transactions on Power Electronics, 2021, 36(6): 6415-6428.
[17] Liu Pengcheng, Wang Zheng, Xu Yang, et al.Improved harmonic profile for high-power PWM current-source converters with modified space-vector modulation schemes[J]. IEEE Transactions on Power Electronics, 2021, 36(10): 11234-11244.
[18] Nussbaumer T, Kolar J W.Improving mains current quality for three-phase three-switch Buck-type PWM rectifiers[J]. IEEE Transactions on Power Electronics, 2006, 21(4): 967-973.
[19] Guo Xiaoqiang, Yang Yong, Wang Baocheng, et al.Generalized space vector modulation for current source converter in continuous and discontinuous current modes[J]. IEEE Transactions on Industrial Electronics, 2020, 67(11): 9348-9357.
[20] 肖蕙蕙, 周琛力, 郭强, 等. 用于改善直流链电流纹波的电流源型整流器扇区优化调制策略[J]. 电工技术学报, 2021, 36(24): 5250-5260.
Xiao Huihui, Zhou Chenli, Guo Qiang, et al.Optimized sector modulation strategy of current source rectifier for DC-link current ripple redu- ction[J]. Transactions of China Electrotechnical Society, 2021, 36(24): 5250-5260.
[21] 郭小强, 杨勇, 王学惠. 电流源变换器直流链电流纹波抑制策略研究[J]. 中国电机工程学报, 2018, 38(20): 6071-6078.
Guo Xiaoqiang, Yang Yong, Wang Xuehui.Research on DC-link current ripple reduction for current source converter[J]. Proceedings of the CSEE, 2018, 38(20): 6071-6078.
[22] Guo Ben, Xu Fan, Zhang Zheyu, et al.Compensation of input current distortion in three-phase Buck rectifiers[C]//IEEE Applied Power Electronics Con- ference and Exposition, Long Beach, 2013: 930-938.
[23] Baumann M, Nussbaumer T, Kolar J W.Comparative evaluation of modulation methods of a three-phase Buck+ Boost PWM rectifier-part Ⅰ: theoretical analysis[J]. IET Power Electronics, 2008, 1(2): 255-267.