基于磁性元件自平衡的双极模块化多电平直流变压器

doi:10.16628/j.cnki.2095-8188.2023.05.005

电器与能效管理技术 ›› 2023, Vol. 0 ›› Issue (5): 30-36.doi: 10.16628/j.cnki.2095-8188.2023.05.005

基于磁性元件自平衡的双极模块化多电平直流变压器

王甫, 李征

东华大学信息科学技术学院, 上海 201600

收稿日期:2022-09-07 出版日期:2023-05-30 发布日期:2023-07-25
作者简介:王甫(1996—),男,硕士研究生,研究方向为电子电子变压器。|李征(1961—),女,教授,博士,研究方向为新能源系统的建模与控制、智能控制、储能系统应用、智能微电网。
基金资助:
国家自然科学基金重点项目(51837007)

Bipolar Modular Multilevel DC Transformer Based on Magnetic Component Self-Balancing

WANG Fu, LI Zheng

School of Information Science and Technology,Donghua University, Shanghai 201600, China

Received:2022-09-07 Online:2023-05-30 Published:2023-07-25

摘要/Abstract

摘要：

双极模块化多电平直流变压器可以满足低压用户对多电压等级、可靠供电以及用电安全等方面的需求,而由其两个直流极之间的功率不平衡所导致的电压不平衡以及不稳定问题是面临的技术挑战。基于二极管中性点箝位三电平半桥变换器,提出一种基于磁性元件自平衡的双极模块化多电平直流变压器拓扑。阐述其自平衡机理,分析开关器件的电流应力,给出了整体的控制策略。与额外使用电压平衡器相比,具有开关器件数量少、占地空间小、平衡电压能力强等优点。最后,基于MATLAB/Simulink搭建仿真模型,验证了所提拓扑结构及控制策略的有效性和可行性。

关键词: 模块化多电平, 直流变压器, 双极接线, 自平衡

Abstract:

The bipolar modular multilevel DC transformer meets the needs of low-voltage users for multiple voltage levels,reliable power supply and power safety.The voltage imbalance and instability caused by the power imbalance between the two DC poles are a technical challenge.A bipolar modular multilevel DC transformer topology based on magnetic component self-balancing is proposed based on a diode-neutral clamped three level half bridge converter.The self-balancing mechanism is described,the current stress on the switching devices is analysed,and an overall control strategy is given.Compared to the additional use of a voltage balancer,it has the advantages of a smaller number of switching devices,a smaller footprint and a higher voltage balancing capability.Finally,a simulation model based on MATLAB/Simulink is built to verify the effectiveness and feasibility of the proposed topology and control strategy.

Key words: modular multilevel, DC transformer, bipolar wiring, self-balancing

中图分类号:

TM464

王甫, 李征. 基于磁性元件自平衡的双极模块化多电平直流变压器[J]. 电器与能效管理技术, 2023, 0(5): 30-36.

WANG Fu, LI Zheng. Bipolar Modular Multilevel DC Transformer Based on Magnetic Component Self-Balancing[J]. LOW VOLTAGE APPARATUS, 2023, 0(5): 30-36.

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参考文献 18

[1]	PEI W, DENG W, ZHANG X, et al. Potential of Using Multiterminal LVDC to Improve Plug-In Electric Vehicle Integration in an Existing Distribution Network[J]. IEEE Transactions on Industrial Electronics, 2015, 62(5):3101-3111. doi: 10.1109/TIE.2014.2379219
[2]	MOHAMMED A A, JOSEPH S C, DHANESH P R. LVDC architecture for residential application:2016 IEEE International Conference on Power Electronics,Drives and Energy Systems (PEDES)[C]. 2016.
[3]	李学军, 张一瑾, 赵尔敏, 等. 接入氢储能的低压直流系统及其商业模式构建[J]. 电器与能效管理技术, 2021(7):29-33.
[4]	韩文辉. 用于直流配电网的双有源桥直流偏置抑制研究[J]. 电器与能效管理技术, 2021(9):91-99.
[5]	RODRIGUEZ-DIAZ E, FANG C, VASQUEZ J C, et al. Voltage-level selection of future two-level lvdc distribution grids:a compromise between grid compatibiliy,safety,and efficiency[J]. IEEE Electrification Magazine, 2016, 4(2):20-28. doi: 10.1109/MELE.2016.2543979
[6]	KAKIGANO H, MIURA Y, ISE T. Low-voltage bipolar-type dc microgrid for super high quality distribution[J]. IEEE Transactions on Power Electronics, 2010, 25(12):3066-3075. doi: 10.1109/TPEL.2010.2077682
[7]	GU Y, LI W, HE X. Analysis and control of bipolar lvdc grid with dc symmetrical component method[J]. IEEE Transactions on Power Systems, 2015, 31(1):685-694. doi: 10.1109/TPWRS.2015.2403310
[8]	张建文, 周剑桥, 施刚, 等. 基于环流注入控制的MMC型固态变压器低压直流真双极运行方案[J]. 中国电机工程学报, 2021, 41(7):2350-2363.
[9]	LEE J, CHO Y, JUNG J. Single-stage voltage balancer with high-frequency isolation for bipolar lvdc distribution system[J]. IEEE Transactions on Industrial Electronics, 2020, 67(5):3596-3606. doi: 10.1109/TIE.41
[10]	LI B, FU Q, MAO S, et al. DC/DC converter for bipolar lvdc system with integrated voltage balance capability[J]. IEEE Transactions on Power Electronics, 2021, 36(5):5415-5424. doi: 10.1109/TPEL.63
[11]	KENZELMANN S, DUJIC D, CANALES F, et al. Modular DC/DC converter:Comparison of modulation methods:Power Electronics & Motion Control Conference[C]. 2012.
[12]	ZHAO B, SONG Q, LI J, et al. High-frequency-link modulation methodology of DC/DC transformer based on modular multilevel converter for hvdc application:Comprehensive analysis and experimental verification[J]. IEEE Transactions on Power Electronics, 2017, 32(5):3413-3424. doi: 10.1109/TPEL.2016.2586196
[13]	GOWAID I A, ADAM G P, MASSOUD A M, et al. Quasi two-level operation of modular multilevel converter for use in a high-power dc transformer with dc fault isolation capability[J]. IEEE Transactions on Power Electronics, 2014, 30(1):108-123. doi: 10.1109/TPEL.2014.2306453
[14]	MEI J, SHEN K, XIAO B L, et al. A new selective loop bias mapping phase disposition pwm with dynamic voltage balance capability for modular multilevel converter[J]. IEEE Transactions on Industrial Electronics, 2013, 61(2):798-807. doi: 10.1109/TIE.2013.2253069
[15]	DARUS R, POU J, KONSTANTINOU G, et al. A modified voltage balancing algorithm for the modular multilevel converter:evaluation for staircase and phase-disposition PWM[J]. Power Electronics IEEE Transactions on, 2015, 30(8):4119-4127. doi: 10.1109/TPEL.2014.2359005
[16]	SUN C, MOU Y, ZHANG J, et al. Cell voltage balancing control of isolated modular multilevel DC/DC converter using inter-submodule phase-shift modulation scheme:2016 IEEE 11th Conference on Industrial Electronics and Applications (ICIEA)[C]. 2016.
[17]	赖锦木, 尹项根, 孙冠群, 等. 隔离型模块化多电平直流变换器子模块电容电压综合控制策略[J]. 中国电机工程学报, 2021, 41(21):7410-7425.
[18]	赵彪, 宋强. 双主动全桥DC/DC变换器的理论和应用技术[M]. 北京: 科学出版社, 2017.

参数	符号	数值
中压侧电压/kV	U_MV	20
正、负极直流线路间的电压/V	U_LV	750
正、负极输出电容/mF	C_LV1,C_LV2	50
隔直电容/mF	C_b	7
子模块电容/μF	C_SM	10
子模块个数/个	N	4
平衡电感/μH	L_b	26.5
桥臂电感/mH	L_p	0.2
折算到一次侧的隔离变压器漏感/mH	L_σ	0.05
外接电感/mH	L_k	3.5
开关频率/kHz	f_s	10
隔离变压器匝数比	n	53.33
负载工况1/Ω	R₁,R₂	0.28,0.28
负载工况2/Ω	R₁,R₂	0.28,￥

基于磁性元件自平衡的双极模块化多电平直流变压器

Bipolar Modular Multilevel DC Transformer Based on Magnetic Component Self-Balancing

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