A Wireless Multi-Objective Power Sharing Method for Energy Storage System in DC Micro-Grid Considering Oscillatory-Type Power

doi:10.12096/j.2096-4528.pgt.22156

Abstract

Abstract:

As the construction of new power systems, DC microgrids will become an important part of the distribution network. As AC load connecting to DC microgrids, the oscillating power will enter the DC system, which affects the power distribution of energy storage system. To solve this issue, the comprehensive principle of power distribution of distributed energy storage system was given, and a wireless power sharing method was proposed. This method takes the charge state as the “information carrier”, each energy storage unit can realize state of charge (SOC) balancing and oscillating power sharing at same time. In addition, from the perspective of equivalent output impedance, this paper gived a detailed analysis and discussion on the distribution effect of different control algorithms, which showed the proposed control algorithm could meet the requirements of the comprehensive principle. Finally, the effectiveness of the proposed distributed energy storage control strategy was validated by experiments.

Key words: new power system, DC micro-grid, oscillatory-type power, power sharing, state of charge (SOC) balancing

CLC Number:

TK 02

Jie YANG, Zhe SUN, Xinyi SU, Gang LU, Bo YUAN. A Wireless Multi-Objective Power Sharing Method for Energy Storage System in DC Micro-Grid Considering Oscillatory-Type Power[J]. Power Generation Technology, 2024, 45(2): 341-352.

Figures/Tables 14

Fig. 1 Typical configuration of DC micro-grid

Fig. 2 Distributed energy storage system in DC micro-grid

Fig. 3 Simplified model of DC micro-grid considering multi-type power

Fig. 4 Principle of SOC balancing control: stage 1

Fig. 5 Principle of SOC balancing control: stage 2

Fig. 6 Diagram of power sharing using traditional control method

Fig. 7 Power sharing principles for distributed energy storage systems

Fig. 8 Amplitude-frequency characteristic curve of equivalent output impedance Zeq1

Fig. 9 Amplitude-frequency characteristic curve of equivalent output impedance Zeq2

Fig. 10 Amplitude-frequency characteristic curve of equivalent output impedance Zeq3

Fig. 11 Experimental platform of DC micro-grid

Tab. 1 Parameters of DC micro-grid experiment platform

类型	参数	数值
DC/DC变换器	输入电压u_b/V	25.6
	滤波电感值L_b/μH	210
	输出滤波电容C_ob/μF	960
	线路阻抗R_lineb/mΩ	100
DC/AC变换器	直流负载阻抗R_dc/Ω	22.5
	交流滤波电感L_f/mH	2
	交流滤波电容C_f/μF	3.3
	交流负载阻抗R_ac/Ω	45
控制	直流母线额定电压u_rated/V	60
	输出交流电压有效值/V	34
	传统下垂系数 $R v *$	0.1
	关系曲线斜率 $g b$	100
	二次调节系数 $h b *$	6
	速率因子μ	4
	开关频率f/kHz	20

Tab. 1 Parameters of DC micro-grid experiment platform

类型	参数	数值
DC/DC变换器	输入电压u_b/V	25.6
	滤波电感值L_b/μH	210
	输出滤波电容C_ob/μF	960
	线路阻抗R_lineb/mΩ	100
DC/AC变换器	直流负载阻抗R_dc/Ω	22.5
	交流滤波电感L_f/mH	2
	交流滤波电容C_f/μF	3.3
	交流负载阻抗R_ac/Ω	45
控制	直流母线额定电压u_rated/V	60
	输出交流电压有效值/V	34
	传统下垂系数 $R v *$	0.1
	关系曲线斜率 $g b$	100
	二次调节系数 $h b *$	6
	速率因子μ	4
	开关频率f/kHz	20

Fig. 12 SOC experimental waveforms under different values of rate factor

Fig. 13 Power sharing experiment waveforms under different output impedances

References 32

1	李建林，郭兆东，马速良，等．新型电力系统下“源网荷储”架构与评估体系综述[J]．高电压技术，2022，48(11)：4330-4342．
	LI J L， GUO Z D， MA S L，et al ．Overview of the “source-grid-load-storage” architecture and evaluation system under the new power system[J]．High Voltage Engineering，2022，48(11)：4330-4342．
2	李建林，张则栋，谭宇良，等．碳中和目标下储能发展前景综述[J]．电气时代，2022(1)：61-65．
	LI J L， ZHANG Z D， TAN Y L，et al ．Review on the development prospect of energy storage under the goal of carbon neutrality[J]．Electric Age，2022(1)：61-65．
3	张勇军，羿应棋，李立浧，等．双碳目标驱动的新型低压配电系统技术展望[J]．电力系统自动化，2022，46(22)：1-12．
	ZHANG Y J， YI Y Q， LI L C，et al ．Prospect of new low-voltage distribution system technology driven by carbon emission peak and carbon neutrality targets[J]．Automation of Electric Power Systems，2022，46(22)：1-12．
4	董旭柱，华祝虎，尚磊，等．新型配电系统形态特征与技术展望[J]．高电压技术，2021，47(9)：3021-3035．
	DONG X Z， HUA Z H， SHANG L，et al ．Morphological characteristics and technology prospect of new distribution system[J]．High Voltage Engineering，2021，47(9)：3021-3035．
5	刘瑜超，刘胜，王景芳，等．基于分布式Raft算法的直流微电网功率协调控制[J]．电力系统自动化，2022，46(19)：70-77． doi:10.7500/AEPS20211021002
	LIU Y C， LIU S， WANG J F，et al ．Coordinated power control for DC microgrid based on distributed raft algorithm[J]．Automation of Electric Power Systems，2022，46(19)：70-77． doi:10.7500/AEPS20211021002
6	曹善康，魏繁荣，林湘宁，等．网侧电压跌落下计及无功支撑效能的直流微电网多目标优化策略[J]．中国电机工程学报，2023，43(15)：5759-5772．
	CAO S K， WEI F R， LIN X N，et al ．Multi-objective optimization strategy of DC microgrid based on reactive power support efficiency during voltage sag[J]．Proceedings of the CSEE，2023，43(15)：5759-5772．
7	李靖，王志和，倪浩．基于改进下垂控制的直流微网运行研究[J]．发电技术，2021，42(6)：765-774． doi:10.12096/j.2096-4528.pgt.21003
	LI J， WANG Z H， NI H ．Research on DC microgrid operation based on improved droop control[J]．Power Generation Technology，2021，42(6)：765-774． doi:10.12096/j.2096-4528.pgt.21003
8	杨继鑫，王久和，王勉，等．基于无源控制的光储直流微网虚拟惯性控制策略研究[J]．发电技术，2021，42(5)：576-584． doi:10.12096/j.2096-4528.pgt.20080
	YANG J X， WANG J H， WANG M，et al ．Research on virtual inertial control strategy of DC microgrid with photovoltaic and storage system based on passivity-based control[J]．Power Generation Technology，2021，42(5)：576-584． doi:10.12096/j.2096-4528.pgt.20080
9	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． doi:10.13335/j.1000-3673.pst.2016.0221
	YANG J， JIN X M， YANG X L，et al ．Overview on power control technologies in hybrid AC-DC microgrid[J]．Power System Technology，2017，41(1)：29-39． doi:10.13335/j.1000-3673.pst.2016.0221
10	李武华，徐驰，禹红斌，等．直流微网系统中混合储能分频协调控制策略[J]．电工技术学报，2016，31(14)：84-92． doi:10.3969/j.issn.1000-6753.2016.14.010
	LI W H， XU C， YU H B，et al ．Frequency dividing coordinated control strategy for hybrid energy storage system of DC micro-grid[J]．Transactions of China Electrotechnical Society，2016，31(14)：84-92． doi:10.3969/j.issn.1000-6753.2016.14.010
11	孟润泉，刘家赢，文波，等．直流微网混合储能控制及系统分层协调控制策略[J]．高电压技术，2015，41(7)：2186-2193．
	MENG R Q， LIU J Y， WEN B，et al ．Hybrid energy storage control and system hierarchical coordinated control strategy for DC microgrids[J]．High Voltage Engineering，2015，41(7)：2186-2193．
12	李建标，陈建福，高滢，等．基于RG-DDPG的直流微网能量管理策略[J]．中国电力，2023，56(7)：85-94．
	LI J B， CHEN J F， GAO Y，et al ．Strategy for DC microgrid energy management based on RG-DDPG[J]．Electric Power，2023，56(7)：85-94．
13	崔俊昊，田桂珍，刘广忱，等．独立运行直流微电网混合储能系统功率分配控制策略研究[J]．电网与清洁能源，2023，39(4)：129-136． doi:10.3969/j.issn.1674-3814.2023.04.017
	CUI J H， TIAN G Z， LIU G C，et al ．A study on the power distribution control strategy of hybrid energy storage system in the isolated DC microgrid[J]．Power System and Clean Energy，2023，39(4)：129-136． doi:10.3969/j.issn.1674-3814.2023.04.017
14	YANG J， JIN X M， WU X Z，et al ．Decentralised control method for DC microgrids with improved current sharing accuracy[J]．IET Generation，Transmission & Distribution，2017，11(3)：696-706． doi:10.1049/iet-gtd.2016.0295
15	丁若星，董戈，吴和平，等．混合储能系统功率分配效果的表征参数研究[J]．电工技术学报，2016，31(S1)：184-189．
	DING R X， DONG G， WU H P，et al ．Research on power sharing results parameterization of hybrid energy storage system[J]．Transactions of China Electrotechnical Society，2016，31(S1)：184-189．
16	LU X N， SUN K， GUERRERO J M，et al ．Double-quadrant state-of-charge-based droop control method for distributed energy storage systems in autonomous DC microgrids[J]．IEEE Transactions on Smart Grid，2015，6(1)：147-157． doi:10.1109/tsg.2014.2352342
17	LU X N， SUN K， GUERRERO J M，et al ．State-of-charge balance using adaptive droop control for distributed energy storage systems in DC microgrid applications[J]．IEEE Transactions on Industrial Electronics，2014，61(6)：2804-2815． doi:10.1109/tie.2013.2279374
18	GUAN Y， VASQUEZ J C， GUERRERO J M ．Coordinated secondary control for balanced discharge rate of energy storage system in islanded AC microgrids[J]．IEEE Transactions on Industry Applications，2016，52(6)：5019-5028． doi:10.1109/tia.2016.2598724
19	DRAGIČEVIĆ T， GUERRERO J M， VASQUEZ J C，et al ．Supervisory control of an adaptive-droop regulated DC microgrid with battery management capability[J]．IEEE Transactions on Power Electronics，2014，29(2)：695-706． doi:10.1109/tpel.2013.2257857
20	WU D， TANG F， DRAGICEVIC T，et al ．A control architecture to coordinate renewable energy sources and energy storage systems in islanded microgrids[J]．IEEE Transactions on Smart Grid，2015，6(3)：1156-1166． doi:10.1109/tsg.2014.2377018
21	杨捷，金新民，吴学智，等．一种适用于直流微电网的改进型电流负荷分配控制策略[J]．中国电机工程学报，2016，36(1)：59-67． doi:10.13334/j.0258-8013.pcsee.2016.01.006
	YANG J， JIN X M， WU X Z，et al ．An improved load current sharing control method in DC microgrids[J]．Proceedings of the CSEE，2016，36(1)：59-67． doi:10.13334/j.0258-8013.pcsee.2016.01.006
22	杨捷，金新民，吴学智，等．直流微网中混合储能系统的无互联通信网络功率分配策略[J]．电工技术学报，2017，32(10)：135-144．
	YANG J， JIN X M， WU X Z，et al ．A wireless power sharing control strategy for hybrid energy storage systems in DC microgrids[J]．Transactions of China Electrotechnical Society，2017，32(10)：135-144．
23	李冰，李岚，王浩，等．一种改善直流微电网负荷电流分配的下垂控制[J]．电力科学与技术学报，2022，37(1)：48-54．
	LI B， LI L， WANG H，et al ．An improved droop control of load current sharing in DC microgrid[J]．Journal of Electric Power Science and Technology，2022，37(1)：48-54．
24	陈景文，刘嘉欣，张文倩．基于一致性算法的直流微网多储能SOC均衡策略[J]．智慧电力，2022，50(9)：30-38． doi:10.3969/j.issn.1673-7598.2022.09.006
	CHEN J W， LIU J X， ZHANG W Q ．State of charge equalization strategy of multi-energy storage in DC microgrid based on consensus algorithm[J]．Smart Power，2022，50(9)：30-38． doi:10.3969/j.issn.1673-7598.2022.09.006
25	陆晓楠，孙凯，黄立培，等．直流微电网储能系统中带有母线电压跌落补偿功能的负荷功率动态分配方法[J]．中国电机工程学报，2013，33(16)：37-46．
	LU X N， SUN K， HUANG L P，et al ．Dynamic load power sharing method with elimination of bus voltage deviation for energy storage systems in DC micro-grids[J]．Proceedings of the CSEE，2013，33(16)：37-46．
26	陆晓楠，孙凯，黄立培，等．孤岛运行交流微电网中分布式储能系统改进下垂控制方法[J]．电力系统自动化，2013，37(1)：180-185．
	LU X N， SUN K， HUANG L P，et al ．Improved droop control method in distributed energy storage systems for autonomous operation of AC microgrid[J]．Automation of Electric Power Systems，2013，37(1)：180-185．
27	HU R， WEAVER W W ．DC microgrid droop control based on battery state of charge balancing[C]//2016 IEEE Power and Energy Conference at Illinois (PECI)．Urbana，IL：IEEE，2016：1-8． doi:10.1109/peci.2016.7459242
28	MORSTYN T， HREDZAK B， DEMETRIADES G D，et al ．Unified distributed control for DC microgrid operating modes[J]．IEEE Transactions on Power Systems，2016，31(1)：802-812． doi:10.1109/tpwrs.2015.2406871
29	LI C， DRAGICEVIC T， PLAZA M G，et al ．Multiagent based distributed control for state-of-charge balance of distributed energy storage in DC microgrids[C]//IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society．Dallas，TX，USA：IEEE，2015：2180-2184． doi:10.1109/iecon.2014.7048804
30	LI C， DRAGICEVIC T， VASQUEZ J C，et al ．Multi-agent-based distributed state of charge balancing control for distributed energy storage units in AC microgrids[C]//2015 IEEE Applied Power Electronics Conference and Exposition (APEC)．Charlotte，NC，USA：IEEE，2015：2967-2973． doi:10.1109/apec.2015.7104773
31	MORSTYN T， HREDZAK B， AGELIDIS V G ．Distributed cooperative control of microgrid storage[J]．IEEE Transactions on Power Systems，2015，30(5)：2780-2789． doi:10.1109/tpwrs.2014.2363874
32	杜韦静，张军明，钱照明．Buck变流器级联系统直流母线电压补偿控制策略[J]．电工技术学报，2015，30(1)：135-142． doi:10.3969/j.issn.1000-6753.2015.01.018
	DU W J， ZHANG J M， QIAN Z M ．Compensation methodology for DC bus voltage of cascaded system formed by Buck converters[J]．Transactions of China Electrotechnical Society，2015，30(1)：135-142． doi:10.3969/j.issn.1000-6753.2015.01.018

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