微电网超级电容器混合储能系统控制策略

doi:10.16088/j.issn.1001-6600.2020050301

摘要/Abstract

摘要： 光伏微电网有离网与并网2种工作模式。在离网模式下由于负荷及可再生能源的功率变化使得直流母线电压产生波动,在并网模式下会因输入功率变动以及非线性负载产生的低次谐波等使并网电流脉动较大,影响电能质量。本文利用超级电容器和蓄电池组2种储能组件构成微电网混合储能方案,使微电网在离网运行时利用超级电容器的快速响应来补偿瞬态功率,从而更快地稳定直流母线电压;并网运行时在传统并网的电压电流双闭环控制策略中,增加超级电容器电流控制环,降低并网时的电流脉动。对混合储能控制方案进行了仿真和验证,结果表明,提出的混合储能控制策略可以使直流微网母线电压的波动控制在5%以内,并且使并网电流总谐波失真维持在7%左右,从而达到控制目的。

关键词: 微电网, 超级电容器, 双向DC/DC, 混合储能, 控制策略

Abstract: Photovoltaic microgrid has two working modes: off-grid modes and grid-connected modes. In off-grid mode, the DC bus voltage fluctuates due to the power changes of load and renewable energy. In grid-connected mode, the grid-connected current fluctuates greatly due to the changes of input power and the low harmonics generated by the nonlinear load, thus affecting the power quality. This paper uses two kinds of energy storage elements of super capacitors and battery packs to form a microgrid hybrid energy storage scheme. When the microgrid runs off-grid, it can make use of the quick response of super capacitor to compensate the transient power, so as to stabilize the DC bus voltage faster. During grid-connected operation, in the traditional grid-connected voltage and current double closed-loop control strategy, the super capacitor current control loop is added to reduce the current ripple during grid-connected operation. The proposed hybrid energy storage control scheme is simulated and verified. The results show that the proposed hybrid energy storage control strategy can control the fluctuation of DC microgrid bus voltage within 5%, and maintain the total harmonic distortion of grid-connected current at 7%, so as to achieve the purpose of control.

Key words: microgrid, super capacitor, bidirectional DC/DC, hybrid energy storage, control strategy

中图分类号:

TM712

杨悦强, 祝龙记. 微电网超级电容器混合储能系统控制策略[J]. 广西师范大学学报（自然科学版）, 2021, 39(2): 71-80.

YANG Yueqiang, ZHU Longji. Control Strategy of Microgrid Super Capacitor Hybrid Energy Storage System[J]. Journal of Guangxi Normal University(Natural Science Edition), 2021, 39(2): 71-80.

参考文献

[1] 吴成明,陈代才,刘祥,等.交直流微网混合储能系统分层协调控制策略[J].通信电源技术,2017,34(3):44-46.DOI:10.19399/j.cnki.tpt.2017.03.014.
[2] 项琴琴,廖志贤,李廷会,等.电网随机扰动下的光伏微网逆变器建模及控制研究[J].广西师范大学学报(自然科学版),2020,38(1):19-25.DOI:10.16088/j.issn.1001-6600.2020.01.003.
[3] INDU RANI B,SARAVANA ILANGO G,NAGAMANI C.Control strategy for power flow management in a PV system supplying DC loads[J].IEEE Transactions on Industrial Electronics,2013,60(8):3185-3194.DOI:10.1109/TIE.2012.2203772.
[4] CHEN Y M,WU H C,CHEN Y C,et al.The AC line current regulation strategy for the grid-connected PV system[J].IEEE Transactions on Power Electronics,2010,25(1):209-218.DOI:10.1109/TPEL.2009.2027238.
[5] TRAN T V,CHUN T W,LEE H H,et al.PLL-based seamless transfer control between grid-connected and islanding modes in grid-connected inverters[J].IEEE Transactions on Power Electronics,2014,29(10):5218-5228.DOI:10.1109/TPEL.2013.2290059.
[6] 刘晓豪,苗虹,曾成碧.基于孤岛模式直流微电网稳定性控制策略[J].可再生能源,2013,31(5):29-33.DOI:10.13941/j.cnki.21-1469/tk.2013.05.005.
[7] HE J W,LI Y W,MUNIR M S.A flexible harmonic control approach through voltage-controlled DG-grid interfacing converters[J].IEEE Transactions on Industrial Electronics,2012,59(1):444-455.DOI:10.1109/TIE.2011.2141098.
[8] 张辉,闫海明,支娜,等.基于母线电压微分前馈的直流微电网并网变换器控制策略[J].电力系统自动化,2019,43(15):166-175.DOI:10.7500/AEPS20181008003.
[9] HREDZAK B,AGELIDIS V G,JANG M.A model predictive control system for a hybrid battery-ultracapacitor power source[J].IEEE Transactions on Power Electronics,2014,29(3):1469-1479.DOI:10.1109/TPEL.2013.2262003.
[10] SHUBHRA,SINGH B.Utility interactive adaptive digital filter based control and off-grid control of PV-BES microgrid[C]//2018 8th IEEE India International Conference on Power Electronics(IICPE).Piscataway,NJ:IEEE,2018:1-6.DOI:10.1109/IICPE.2018.8709418.
[11] YIN H,ZHAO C,LI M,et al.Optimization based energy control for battery/super-capacitor hybrid energy storage systems[C]//IECON 2013-39th Annual Conference of the IEEE Industrial Electronics Society.Piscataway,NJ:IEEE,2013:6764-6769.DOI:10.1109/IECON.2013.6700252.
[12] 周建宇,闫林芳,刘巨,等.基于一致性理论的直流微电网混合储能协同控制策略[J].中国电机工程学报,2018,38(23):6837-6846.DOI:10.13334/j.0258-8013.pcsee.181254.
[13] 范其丽,郑晓茜,王璞,等.基于混合储能动态调节的独立混合微电网分布式协调控制[J].电力系统保护与控制,2018,46(7):105-114.DOI:10.7667/PSPC170368.
[14] WU T,LIU Z,LIU J J.et al.A unified virtual power decoupling method for droop-controlled parallel inverters in microgrids[J].IEEE Transactions on Power Electronics,2016,31(8):5587-5603.DOI:10.1109/TPEL.2015.2497972.
[15] ORITI G,JULIAN A L,ANGLANI N,et al.Novel economic analysis to design the energy storage control system of a remote islanded microgrid[J].IEEE Transactions on Industry Applications,2018,54(6):6332-6342.DOI:10.1109/TIA.2018.2853041.
[16] 杨旭红,尹聪聪.基于孤岛模式光储直流微电网的协调控制策略[J].电气传动,2020,50(5):75-80. DOI:10.19457/j.1001-2095.dqcd19174.
[17] 刘道兵,李留根,李世春,等.含混合储能系统的独立直流微网协调控制策略[J].可再生能源,2020,38(4):524-531.DOI:10.13941/j.cnki.21-1469/tk.2020.04.016.
[18] CHEN J W,CHEN J.Stability analysis and parameters optimization of islanded microgrid with both ideal and dynamic constant power loads[J].IEEE Transactions on Industrial Electronics,2018,65(4):3263-3274.DOI:10.1109/TIE.2017.2756588.
[19] DÍAZ N L,LUNA A C,VASQUEZ J C,et al.Centralized control architecture for coordination of distributed renewable generation and energy storage in islanded AC microgrids[J].IEEE Transactions on Power Electronics,2017,32(7):5202-5213.DOI:10.1109/TPEL.2016.2606653.
[20] 李祥山,杨晓东,张有兵,等.含母线电压补偿和负荷功率动态分配的直流微电网协调控制[J].电力自动化设备,2020,40(1):198-204.DOI:10.16081/j.epae.201912011.
[21] 谢文强,韩民晓,严稳利,等.考虑恒功率负荷特性的直流微电网分级稳定控制策略[J].电工技术学报,2019,34(16):3430-3443.DOI:10.19595/j.cnki.1000-6753.tces.181565.
[22] KARIMI Y,ORAEE H,GOLSORKHI M S,et al.Decentralized method for load sharing and power management in a PV/battery hybrid source islanded microgrid[J].IEEE Transactions on Power Electronics,2017,32(5):3525-3535.DOI:10.1109/TPEL.2016.2582837.
[23] 金胜赫,孙秋野,周建国,等.孤岛运行微网中分布式谐波功率分配控制策略[J].控制工程,2018,25(2):335-340.DOI:10.14107/j.cnki.kzgc.160025.
[24] AKHTAR I,KIRMANI S,JAMIL M.Analysis and design of a sustainable microgrid primarily powered by renewable energy sources with dynamic performance improvement[J].IET Renewable Power Generation,2019,13(7):1024-1036.DOI:10.1049/iet-rpg.2018.5117.
[25] SHARMA R K,MISHRA S.Dynamic power management and control of a PV PEM fuel-cell-based standalone ac/dc microgrid using hybrid energy storage[J].IEEE Transactions on Industry Applications,2018,54(1):526-538.DOI:10.1109/TIA.2017.27560323.

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