一种无需高带宽通信线路的高精度自主均流控制策略

doi:10.19595/j.cnki.1000-6753.tces.200738

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Abstract The DC microgrid parallel systems mostly use droop control to achieve power distribution. However, the line impedance will reduce power distribution precision. The traditional current sharing strategy is based on high-bandwidth communication lines, which has high manufacturing cost and low reliability. In addition, the communication delay in the communication line will affect the power distribution precision. In this paper, an optical autonomous current sharing strategy of parallel storage converters in the DC microgrid is proposed. This strategy analyzes the influence of line impedance on the power distribution characteristics of the converter in constant voltage operation mode and droop operation mode. A virtual impedance compensation link is designed to adjust the output power of the converter according to the output electrical characteristics of the converter, and then, the output power of each converter is equally shared. The effectiveness of the proposed parallel system autonomous current sharing strategy is verified by simulation and experiment.

Key words： DC microgrid autonomous current sharing strategy virtual impedance compensation

Received: 30 June 2020

PACS:

TM727

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	Articles by authors
	Zhi Na
	Ding Ke
	Huang Qinghui
	Li Wuhua
	Zhang Hui

Cite this article:

Zhi Na,Ding Ke,Huang Qinghui等. An High Precision Autonomous Current Sharing Control Strategy without High Bandwidth Communication Line[J]. Transactions of China Electrotechnical Society, 2021, 36(16): 3375-3385.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200738 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I16/3375

[1] 郭伟, 赵洪山. 基于事件触发机制的直流微电网多混合储能系统分层协调控制方法[J]. 电工技术学报, 2020, 35(5): 1140-1151.
Guo Wei, Zhao Hongshan.Coordinated control method of multiple hybrid energy storage system in DC microgrid based on event-triggered mechanism[J]. Transactions of China Electrotechnical Society, 2020, 35(5): 1140-1151.
[2] 徐宏健, 赵涛, 朱爱华, 等. 直流微电网的改进型下垂控制策略[J]. 电气技术, 2019, 20(7): 14-17.
Xu Hongjian, Zhao Tao, Zhu Aihua, et al.Research on a new improved droop control method for DC micro- grid[J]. Electrical Engineering, 2019, 20(7): 14-17.
[3] 支娜, 张辉, 肖曦. 提高直流微电网动态特性的改进下垂控制策略研究[J]. 电工技术学报, 2016, 31(3): 31-39.
Zhi Na, Zhang Hui, Xiao Xi.Research on the improved droop control strategy for improving the dynamic characteristics of DC microgrid[J]. Transactions of China Electrotechnical Society, 2016, 31(3): 31-39.
[4] Cai Hongda, Xiang Ji, Wei Wei, et al.V-dp/dv droop control for PV sources in DC microgrids[J]. IEEE Transactions on Power Electronics, 2018, 33(9): 7708-7720.
[5] 佟子昂, 武建文, 马速良, 等. 一种基于主动电压扰动的直流微网负载均流控制策略[J]. 电工技术学报, 2019, 34(24): 5199-5208.
Tong Ziang, Wu Jianwen, Ma Suliang, et al.A load current-sharing control strategy for DC microgrid converters based on active voltage disturbance[J]. Transactions of China Electrotechnical Society, 2019, 34(24): 5199-5208.
[6] 孟建辉, 邹培根, 王毅, 等. 基于灵活虚拟惯性控制的直流微网小信号建模及参数分析[J]. 电工技术学报, 2019, 34(12): 2615-2626.
Meng Jianhui, Zou Peigen, Wang Yi, et al.Small- signal modeling and parameter analysis of the DC microgrid based on flexible virtual inertia control[J]. Transactions of China Electrotechnical Society, 2019, 34(12): 2615-2626.
[7] Federico I, Jose E, Luis F.Master-slave DC droop control for paralleling auxiliary DC/DC converters in electric bus applications[J]. IET Power Electronics, 2017, 10(10): 1156-1164.
[8] 芦思晨, 潘再平. 无储能风电微网系统的下垂控制策略[J]. 电工技术学报, 2016, 31(18): 169-175.
Lu Sichen, Pan Zaiping.Droop control strategy of wind power microgrid system without energy storage device[J]. Transactions of China Electrotechnical Society, 2016, 31(18): 169-175.
[9] 陆晓楠, 孙凯, Josep Guerrero, 等. 适用于交直流混合微电网的直流分层控制系统[J]. 电工技术学报, 2013, 28(4): 35-42.
Lu Xiaonan, Sun Kai, Josep Guerrero, et al.DC hierarchical control system for microgrid applica- tions[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 35-42.
[10] Cai Hongda, Xiang Ji, Wei Wei.Decentralized coordination control of multiple photovoltaic sources for DC bus voltage regulating and power sharing[J]. IEEE Transactions on Industrial Electronics, 2018, 65(7): 5601-5610.
[11] Chen Xia, Shi Mengxuan, Sun Haishun, et al.Distributed cooperative control and stability analysis of multiple DC electric springs in a DC microgrid[J]. IEEE Transactions on Industrial Electronics, 2018, 65(7): 5611-5622.
[12] Cook M D, Parker G G, Robinett R D, et al.Decentralized mode-adaptive guidance and control for DC microgrid[J]. IEEE Transactions on Power Delivery, 2017, 32(1): 263-271.
[13] 喻礼礼, 张兆云, 刘艺涛. 基于改进自适应下垂的直流微电网稳定分析与研究[J]. 电气技术, 2020, 21(5): 28-32.
Yu Lili, Zhang Zhaoyun, Liu Yitao.Stability analysis and research of DC microgrid based on improved adaptive drooping[J]. Electrical Engineering, 2020, 21(5): 28-32.
[14] Cingoz F, Elrayyah A, Sozer Y.Optimized settings of droop parameters using stochastic load modeling for effective DC microgrids operation[J]. IEEE Transa- ctions on Industry Applications, 2017, 53(2): 1358-1371.
[15] Shehata E G, Thomas J, Mostafa R M, et al.An improved droop control for a low voltage DC micro- grid operation[C]//Twentieth International Middle East Power Systems Conference (MEPCON), Cairo, Egypt, 2018: 850-855.
[16] Dam H D, Lee H H.A power distributed control method for proportional load power sharing and bus voltage restoration in a DC microgrid[J]. IEEE Transactions on Industry Applications, 2018, 54(4): 3616-3625.
[17] Prabhakaran P, Goyal Y, Agarwal V.Novel nonlinear droop control techniques to overcome the load sharing and voltage regulation issues in DC microgrid[J]. IEEE Transactions on Power Electronics, 2018, 33(5): 4477-4487.
[18] Shirazul, Islam, Shyam, et al. Ideal current-based distributed control to compensate line impedance in DC microgrid[J]. IET Power Electronics, 2018, 11(7): 1178-1186.
[19] Augustine S, Mishra M K, Lakshminarasamma N.Adaptive droop control strategy for load sharing and circulating current minimization in low-voltage standalone DC microgrid[J]. IEEE Transactions on Sustainable Energy, 2015, 6(1): 132-141.
[20] Ingle A A, Shyam A B, Sahoo S R, et al.Quality index based distributed secondary controller for low voltage DC microgrid[J]. IEEE Transactions on Industrial Electronics, 2018, 65(9): 7004-7014.
[21] Lu Xiaonan, Guerrero Josep M, Sun Kai, et al.An improved droop control method for DC microgrids based on low bandwidth communication with DC bus voltage restoration and enhanced current sharing accuracy[J]. IEEE Transactions on Power Electronics, 2014, 29(4): 1800-1812.
[22] Tah A, Das D.An enhanced droop control method for accurate load sharing and voltage improvement of isolated and interconnected DC microgrids[J]. IEEE Transactions on Sustainable Energy, 2016, 7(3): 1194-1204.