交直流混合微电网并联双向互联变换器环流抑制与功率控制*

doi:10.11985/2022.01.005

电气工程学报 ›› 2022, Vol. 17 ›› Issue (1): 31-40.doi: 10.11985/2022.01.005

所属专题：特邀专栏：电力电子化配电网关键设备和运行控制

• 特邀专栏: 电力电子化配电网关键设备和运行控制 • 上一篇下一篇

扫码分享

交直流混合微电网并联双向互联变换器环流抑制与功率控制^*

郭强(), 向文凯(), 李山

重庆理工大学重庆市能源互联网工程技术研究中心重庆 400054

收稿日期:2021-12-09 修回日期:2022-02-01 出版日期:2022-03-25 发布日期:2022-05-06
作者简介:郭强,男,1984年生,博士,副教授。主要研究方向为大功率变流器及控制技术。E-mail： guoqiang@cqut.edu.cn;
向文凯,男,1996年生,硕士研究生。主要研究方向为互联变换器控制技术。E-mail： wenkaihh@163.com
基金资助:
*重庆市教委科学技术研究计划(KJQN202001128);重庆市巴南区科技成果转化及产业化专项资助项目

Circulating Current Suppression and Power Control of Paralleled Bidirectional Interlinking Converters in Hybrid AC/DC Microgrid

GUO Qiang(), XIANG Wenkai(), LI Shan

Chongqing Energy Internet Engineering Technology Research Center, Chongqing University of Technology, Chongqing 400054

Received:2021-12-09 Revised:2022-02-01 Online:2022-03-25 Published:2022-05-06

摘要/Abstract

摘要：

针对交直流混合微电网中多台双向互联变流器(Bidirectional interlinking converter,BIC)并联运行时功率流动、分配以及环流问题,提出一种用于多并联BIC的分布式电源管理控制策略,其中每个BIC设计有独立的局部分布式控制器,计算出各自的功率参考值,并可根据不同功率额定值按比例分配,实现两子网间功率流动及不同BIC间的功率分配;此外,在零矢量前馈控制策略的基础上,提出一种虚拟BIC概念,以实现多并联BIC环流抑制。仿真与硬件在环试验结果表明该策略可有效控制两子网间的功率流动及多模块间环流抑制。

关键词: 交直流混合微电网, 双向互联变流器, 功率流动, 局部分布式控制, 环流抑制

Abstract:

Aiming at the power flow, distribution and circulation problems when multiple bidirectional interlinking converters (BICs) are operating in parallel in AC-DC hybrid microgrids, a distributed power management control strategy for multi-parallel BICs is proposed. Each BIC is designed with an independent local distributed controller, which calculates its own power reference value, and can be allocated proportionally according to different power ratings to realize the power flow between the two sub-networks and the power distribution between different BICs. In addition, based on the null vector feedforward control strategy, a virtual BIC concept is proposed to realize the multi-parallel BIC circulating current suppression. The simulation and hardware-in-the-loop experimental results show that the strategy can effectively control the power flow between the two sub-networks and suppress the circulating current between multiple modules.

Key words: Hybrid AC/DC microgrid, bidirectional interlinking converter, power flow, locally distributed control, circulation suppression

中图分类号:

TM461

郭强, 向文凯, 李山. 交直流混合微电网并联双向互联变换器环流抑制与功率控制^*[J]. 电气工程学报, 2022, 17(1): 31-40.

GUO Qiang, XIANG Wenkai, LI Shan. Circulating Current Suppression and Power Control of Paralleled Bidirectional Interlinking Converters in Hybrid AC/DC Microgrid[J]. Journal of Electrical Engineering, 2022, 17(1): 31-40.

图/表 16

图1

图2

图3

图4

图5

图6

图7

表1

图8

图9

图10

图11

图12

图13

图14

图15

参考文献 21

[1]	ZHOU Quan, SHAHIDEHPOUR M, LI Zhiyi, et al. Compartmentalization strategy for the optimal economic operation of a hybrid ac/dc microgrid[J]. IEEE Transactions on Power Systems, 2020, 35(2):1294-1304. doi: 10.1109/TPWRS.2019.2942273
[2]	施静容, 李勇, 贺悝, 等. 一种提升交直流混合微电网动态特性的综合惯量控制方法[J]. 电工技术学报, 2020, 35(2):337-345.
	SHI Jingrong, LI Yong, HE Li, et al. A comprehensive inertia control method for improving the dynamic characteristics of hybrid ac-dc microgrid[J]. Transactions of China Electrotechnical Society, 2020, 35(2):337-345.
[3]	NEJABATKHAH F, LI Y W. Overview of power management strategies of hybrid ac/dc microgrid[J]. IEEE Transactions on Power Electronics, 2015, 30(12):7072-7089. doi: 10.1109/TPEL.2014.2384999
[4]	VAN HERTEM D, GHANDHARI M, DELIMAR M. Technical limitations towards a supergrid:A European prospective[C]// IEEE International Energy Conference,Manama,Bahrain:IEEE, 2010:302-309.
[5]	葛宇航. 交直流混合微电网中双向互联变流器并联控制策略研究[D]. 重庆: 重庆理工大学, 2021.
	GE Yuhang. Multi-paralleled bidirectional interlinking converters control strategy in hybrid ac/dc microgrids[D]. Chongqing: Chongqing University of Technology, 2021.
[6]	SADEGHI M, KHEDERZADEH M. Hybrid multi-dc-ac MG based on multilevel interlinking converter[J]. IET Power Electronics, 2019, 12(5):1187-1194. doi: 10.1049/iet-pel.2018.5579
[7]	曹文远, 韩民晓, 谢文强, 等. 交直流配电网逆变器并联控制技术研究现状分析[J]. 电工技术学报, 2019, 34(20):4226-4241.
	CAO Wenyuan, HAN Minxiao, XIE Wenqiang, et al. Analysis on research status of parallel inverters control technologies for ac/dc distribution network[J]. Transactions of China Electrotechnical Society, 2019, 34(20):4226-4241.
[8]	涂春鸣, 黄红, 兰征, 等. 微电网中电力电子变压器与储能的协调控制策略[J]. 电工技术学报, 2019, 34(12):2627-2636.
	TU Chunming, HUANG Hong, LAN Zheng, et al. Coordinated control strategy of power electronic transformer and energy storage in microgrid[J]. Transactions of China Electrotechnical Society, 2019, 34(12):2627-2636.
[9]	JI Y, WU M, LIU H T, et al. Bidirectional droop control of interlinking converter in ac/dc hybrid micro-grid[C]// International Conference on Information Science and Control Engineering,Beijing, 2016:879-883.
[10]	杨捷, 金新民, 杨晓亮, 等. 交直流混合微网功率控制技术研究综述[J]. 电网技术, 2017, 41(1):29-39.
	YANG Jie, JIN Xinmin, YANG Xiaoliang, et al. Overview on power control technologies in hybrid ac-dc microgrid[J]. Power System Technology, 2017, 41(1):29-39.
[11]	EAJAL A A, ABDELWAHED M A, EL-SAADANY E F, et al. A unified approach to the power flow analysis of ac/dc hybrid microgrids[J]. IEEE Transactions on Sustainable Energy, 2016, 7(3):1145-1158. doi: 10.1109/TSTE.2016.2530740
[12]	NASIRIAN V, DAVOUDI A, LEWIS F L, et al. Distributed adaptive droop control for dc distribution systems[J]. IEEE Transactions on Energy Conversion, 2014, 29(4):944-956. doi: 10.1109/TEC.2014.2350458
[13]	XIA Y H, PENG Y G, YANG P C, et al. Distributed coordination control for multiple bidirectional power converters in a hybrid ac/dc microgrid[J]. IEEE Transactions on Power Electronics, 2017, 32(6):4949-4959. doi: 10.1109/TPEL.2016.2603066
[14]	XIA Y H, PENG Y G, YANG P C, et al. Decentralized coordination control for parallel bidirectional power converters in a grid-connected dc microgrid[J]. IEEE Transactions on Smart Grid, 2018, 9(6):6850-6861. doi: 10.1109/TSG.2017.2725987
[15]	PEYGHAMI S, MOKHTARI H, BLAABJERG F. Autonomous operation of a hybrid ac/dc microgrid with multiple interlinking converters[J]. IEEE Transactions on Smart Grid, 2018, 9(6):6480-6488. doi: 10.1109/TSG.2017.2713941
[16]	PAN C T, LIAO Y H. Modeling and coordinate control of circulating currents in parallel three-phase boost rectifiers[J]. IEEE Transactions on Industrial Electronics, 2007, 54(2):825-838. doi: 10.1109/TIE.2007.891776
[17]	李国武, 梁吉, 许健, 等. 适用于不同等效阻抗的并联逆变器环流抑制方法研究[J]. 电子设计工程, 2016, 24(19):141-144.
	LI Guowu, LIANG Ji, XU Jian, et al. Study on restraint of circulating current in parallel inverters with different equivalent impedance[J]. Electronic Design Engineering, 2016, 24(19):141-144.
[18]	陈杰, 刘名凹, 陈新, 等. 基于下垂控制的逆变器无线并联与环流抑制技术[J]. 电工技术学报, 2018, 33(7):1450-1460.
	CHEN Jie, LIU Mingao, CHEN Xin, et al. Wireless parallel and circulation current reduction of droop-controlled inverters[J]. Transactions of China Electrotechnical Society, 2018, 33(7):1450-1460.
[19]	肖华根, 罗安, 王逸超, 等. 微网中并联逆变器的环流控制方法[J]. 中国电机工程学报, 2014, 34(19):3098-3104.
	XIAO Huagen, LUO An, WANG Yichao, et al. A circulating current control method for paralleled inverters in microgrids[J]. Proceedings of the CSEE, 2014, 34(19):3098-3104.
[20]	ZHANG X G, CHEN J M, MA Y, et al. Bandwidth expansion method for circulating current control in parallel three-phase PWM converter connection system[J]. IEEE Transactions on Power Electronics, 2014, 29(12):6847-6856. doi: 10.1109/TPEL.2014.2311046
[21]	张厚升, 张磊, 姜吉顺, 等. 两并联三相PWM整流器零序环流抑制与均流控制[J]. 电力自动化设备, 2018, 38(2):153-160.
	ZHANG Housheng, ZHANG Lei, JIANG Jishun, et al. Circulating current suppressing and current balancing for two parallel three-phase PWM rectifiers[J]. Electric Power Automation Equipment, 2018, 38(2):153-160.

		数值
交流侧	f_acmax, f_acmin/Hz	51, 49
	P_acmax/kW	40
	L_a/mH	1.35
	C_a/μF	60
	a	2/40 000
	E_a/V	700
直流侧	V_dcmax, V_dcmin/V	710, 690
	P_dcmax/kW	40
	L_d/mH	2
	C_d/μF	470
	d	20/40 000
	E_d/V	380
并联BIC	P_1max, P_2max, P_3max/kW	6, 9, 18
	g₁, g₂, g₃	1, 0, 0
	L₁, L₂, L₃/mH	4, 5, 6

交直流混合微电网并联双向互联变换器环流抑制与功率控制^*

Circulating Current Suppression and Power Control of Paralleled Bidirectional Interlinking Converters in Hybrid AC/DC Microgrid

RichHTML

PDF

可视化

摘要/Abstract

引用本文

使用本文

图/表 16

参考文献 21

相关文章 2

编辑推荐

Metrics

本文评价

[1]	范必双,魏国强,李泽扬,姚淦洲. 基于动态虚拟复阻抗的微网下垂控制策略[J]. 电气工程学报, 2020, 15(1): 48-54.
[2]	张明锐,谢青青,林显琦,欧阳丽. 多模块化逆变器直接并联控制及效率分析研究[J]. 电气工程学报, 2015, 10(7): 48-56.