多相交错并联DC-DC变换器单电流传感器控制策略

doi:10.19595/j.cnki.1000-6753.tces.201166

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (6807 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract For multiphase interleaved DC-DC converters, current sharing among inductors is an important issue, so this paper proposes a single-sensor sampling current algorithm with current dynamic sharing capability. Firstly, a detailed mathematical model is presented according to the converter operation mode. The factors affecting current imbalance among phases are analyzed, and the analytical expressions of the phase current, parasitic resistance, load current and duty cycle are derived. Secondly, considering the non-ideal characteristics of the switches, all the parasitic resistances are estimated with constant duty-cycle test method by turning-on each phase. Taking the output of voltage loop controller as the reference value, the duty cycle compensation factors are introduced to obtain balanced inductor current. Besides, the control loop based on small-signal modeling is analyzed using the frequency-response method, and supported with the Matlab/SISO design tool, the zero position and loop gain of the controller are optimized. Stability against the load variations is investigated by means of the root locus analysis. Meanwhile, to further improve the dynamic performance, the feedforward control is implemented and the output impedance can be reduced dramatically. Finally, the experimental setup based on a three-phase interleaved Buck converter is constructed, and the steady-state and dymamic experimental results verify the correctness of the proposed control strategy.

Key words： Interleaved converter single-current sensor current sharing feedforward control

Received: 06 September 2020

PACS:

TM46

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Guo Qiang
	Li Shan
	Xie Shiyun
	Yang Yi

Cite this article:

Guo Qiang,Li Shan,Xie Shiyun等. Single-Sensor Sampling Current Control Strategy of Multiphase Interleaved DC-DC Converters[J]. Transactions of China Electrotechnical Society, 2022, 37(4): 964-975.

URL:

https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.201166 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I4/964

[1] 杨玉岗, 马杰,马云巧, 等. 多相交错并联磁集成双向DC/DC变换器中耦合电感的通用设计准则[J]. 中国电机工程学报, 2015, 35(23): 6122-6134.
Yang Yugang, Ma jie, Ma Yunqiao, et al. The universal design criterion of coupled inductors in multiphase interleaving and magnetically integrated bidirectional DC/DC converters[J]. Proceedings of the CSEE, 2015, 35(23): 6122-6134.
[2] Koran A, LaBella T, Lai J. High efficiency photo- voltaic source simulator with fast response time for solar power conditioning systems evaluation[J]. IEEE Transactions on Power Electronics, 2014, 29(3): 1285-1297.
[3] Calderon-Lopez G, Scoltock J, Wang Y, et al.Power- dense bi-directional DC-DC converters with high performance inductors[J]. IEEE Transactions on Vehicular Technology, 2019, 68(12): 11439-11448.
[4] Mouli G R C, Schijffelen J H, Bauer P, et al. Design and comparison of a 10kW interleaved Boost con- verter for PV application using Si and SiC devices[J]. IEEE Journal of Emerging & Selected Topics in Power Electronics, 2017, 5(2): 610-623.
[5] Rocabert J, Capo-Misut R, Munoz-Aguilar R S, et al. Control of energy storage system integrating electro- chemical batteries and supercapacitors for grid- connected applications[J]. IEEE Transactions on Industry Applications, 2019, 55(2): 1853-1862.
[6] 苏冰, 王玉斌, 王璠, 等. 基于耦合电感的多相交错并联双向DC-DC变换器及其均流控制[J]. 电工技术学报, 2020, 35(20): 4336-4349.
Su Bing, Wang Yubin, Wang Fan, et al.Multi-phase interleaved bidirectional dc-dc converter with coupled inductors and current sharing control strategy[J]. Transactions of China Electrotechnical Society, 2020, 35(20): 4336-4349.
[7] Meng L, Dragicevic T, Vasquez J C, et al.Tertiary and secondary control levels for efficiency optimi- zation and system damping in droop controlled DC-DC converters[J]. IEEE Transactions on Smart Grid, 2015, 6(6): 2615-2626.
[8] Chen Hungchi, Lu Cheyu, Rout U S.Decoupled master-slave current balancing control for three-phase interleaved Boost converters[J]. IEEE Transactions on Power Electronics, 2018, 33(5): 3683-3687.
[9] Huang P H, Liu Pochun, Xiao Weidong, et al.A novel droop-based average voltage sharing control strategy for DC microgrids[J]. IEEE Transactions on Smart Grid, 2015, 6(3): 1096-1106.
[10] Calderon-Lopez G, Villarruel-Parra A, Kakosimos P, et al.Comparison of digital PWM control strategies for high-power interleaved DC-DC converters[J]. IET Power Electronics, 2018, 11(2): 391-398.
[11] Tricarico T, Gontijo G F, Aredes M, et al.New hybrid-microgrid topology using a bidirectional interleaved converter as a robust power interface operating in grid-connected and islanded modes[J]. IET Renewable Power Generation, 2020, 14(1): 134-144.
[12] Foley R F, Kavanagh R C, Egan M G.Sensorless current estimation and sharing in multiphase Buck converters[J]. IEEE Transactions on Power Elec- tronics, 2012, 27(6): 2936-2946.
[13] Huang W, Abu Qahouq J A. Input voltage ripple- based sensorless current sharing autotuning controller for multiphase DC-DC converters[J]. IEEE Transa- ctions on Industry Applications, 2016, 52(5): 4117-4125.
[14] Abu Qahouq J A, Huang L, Huard D. A sensorless current sharing analysis and scheme for multiphase converters[J]. IEEE Transactions on Power Electro- nics, 2008, 23(5): 2237-2247.
[15] Gordillo J, Aguilar C.A simple sensorless current sharing technique for multiphase DC-DC Buck converters[J]. IEEE Transactions on Power Elec- tronics, 2017, 32(5): 3480-3489.
[16] 杨俊杰, 刘思扬, 孙旭, 等. 多重交错并联开路电路故障检测[J]. 中国电机工程学报, 2019, 39(11): 3336-3343.
Yang Junjie, Liu Siyang, Sun Xu, et al.Multi-phase interleaved converter open circuit fault diagnosis[J]. Proceedings of the CSEE, 2019, 39(11): 3336-3343.
[17] 王朝强, 曹太强, 郭筱瑛, 等. 三相交错并联双向DC-DC变换器动态休眠控制策略[J]. 电工技术学报, 2020, 35(15): 3514-3523.
Wang Chaoqiang, Cao Taiqiang, Guo Xiaoying, et al.Dynamic dormancy control strategy of three-phase staggered parallel bidirectional DC-DC converter[J]. Transactions of China Electrotechnical Society, 2020, 35(15): 3514-3523.
[18] Sha Deshang, Zhang Jiankun, Wang Xiao, et al.Dynamic response improvements of parallel connected bidirectional DC-DC converters for electrical drive powered by low-voltage battery employing optimized feedforward control[J]. IEEE Transactions on Power Electronics, 2017, 32(10): 7783-7794.
[19] 丘东元, 张波, 韦聪颖. 改进式自主均流技术的研究[J]. 电工技术学报, 2005, 20(10): 41-47.
Qiu Dongyuan, Zhang Bo, Wei Congying.Study of paralleled Buck converters with improved automatic current-sharing technique[J]. Transactions of China Electrotechnical Society, 2005, 20(10): 41-47.
[20] 杨玉岗, 吴晗, 关婷婷. 交错并联LLC谐振变换器的磁集成均流特性[J]. 电工技术学报, 2019, 34(12): 2529-2538.
Yang Yugang, Wu Han, Guan Tingting.Magnetic integrated current sharing characteristics of inter- leaved LLC resonant converter[J]. Transactions of China Electrotechnical Society, 2019, 34(12): 2529-2538.
[21] 任小永, 王亚坤, 陈宇, 等. 基于虚拟阻抗的LLC谐振变换器并联均流控制[J]. 电工技术学报, 2019, 34(21): 4540-4550.
Ren Xiaoyong, Wang Yakun, Chen Yu, et al.Parallel current sharing control of LLC resonant converter based on virtual impedance[J]. Transactions of China Electrotechnical Society, 2019, 34(21): 4540-4550.