基于分层控制的孤岛微电网储能优化控制策略

doi:10.19799/j.cnki.2095-4239.2021.0553

储能科学与技术 ›› 2022, Vol. 11 ›› Issue (1): 176-184.doi: 10.19799/j.cnki.2095-4239.2021.0553

基于分层控制的孤岛微电网储能优化控制策略

李瑜¹(), 张占强¹(), 孟克其劳², 魏皓天¹

^1.内蒙古工业大学信息工程学院
^2.内蒙古工业大学能源与动力工程学院，内蒙古呼和浩特 010051

收稿日期:2021-10-20 修回日期:2021-11-11 出版日期:2022-01-05 发布日期:2022-01-10
通讯作者: 张占强 E-mail:ly1120850221@163.com;dzxzzq@163.com
作者简介:李瑜（1996—），男，硕士研究生，主要研究方向为微电网能量管理控制技术，E-mail：ly1120850221@163.com|张占强，副教授，主要研究方向为微电网控制技术，E-mail： dzxzzq@163.com。
基金资助:
内蒙古自治区科技重大专项计划项目(2020ZD0016);内蒙古自治区关键技术攻关计划项目(2020GG0281)

Optimal control strategy for energy storage in island microgrid based on hierarchical control

Yu LI¹(), Zhanqiang ZHANG¹(), Keqilao MENG², Haotian WEI¹

^1.The College of Information Engineering, Inner Mongolia University of Technology
^2.The College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, Inner Mongolia, China

Received:2021-10-20 Revised:2021-11-11 Online:2022-01-05 Published:2022-01-10
Contact: Zhanqiang ZHANG E-mail:ly1120850221@163.com;dzxzzq@163.com

摘要/Abstract

摘要：

针对直流微网在储能控制策略中所采用的传统下垂控制方法，存在功率输出不均、母线电压跌落等问题，提出了微电网在孤岛模式下储能装置稳定直流母线和负荷恒功率运行的分层控制策略，将微电网优化控制过程分为两层：一级控制层下的储能作为微电网主要能量分配的装置，提出了基于双闭环的下垂控制策略，将储能电池变换器通过P-f、Q-u进行双层下垂控制，实现负荷的恒功率运行；二级控制层下的储能作为稳定直流母线电压以及补偿一级储能的装置，提出了同步参考坐标系控制(synchronous reference frame control，SRFC)策略，并在控制中加入自调谐滤波器(self tuning filter，STF)，实现对交流信号中谐波的滤除。最后利用Matlab/Simulink进行了仿真验证，仿真结果表明分层优化策略使负荷恒功率运行的同时稳定了直流母线电压。

关键词: 孤岛模式, 直流微电网, 储能装置, 下垂控制, 同步参考坐标系控制

Abstract:

In view of the problems of uneven power output and bus voltage drop in the traditional droop control method adopted in the DC microgrid in the energy storage control strategy, the microgrid is proposed to stabilize the DC bus and load constant power operation of the energy storage device in the island mode. The hierarchical control strategy divides the microgrid optimization control process into two layers: the energy storage under the primary control layer is used as the main energy distribution device of the microgrid, and a droop control strategy based on double closed loops is proposed to pass the energy storage battery converter P-f and Q-u carry out double-layer droop control to achieve constant power operation of the load; the energy storage under the secondary control layer is used as a device to stabilize the DC bus voltage and compensate for the primary energy storage. The Synchronous Reference Frame Control (SRFC) strategy is proposed, and add a Self Tuning Filter (STF) in the control to achieve the filtering of harmonics in the AC signal. Finally, Matlab/Simulink is used for simulation verification. The simulation results show that the hierarchical optimization strategy enables the load to run at constant power while stabilizing the DC bus voltage.

Key words: island mode, DC microgrid, energy storage device, droop control, synchronous reference coordinate system control

中图分类号:

TM 46

李瑜, 张占强, 孟克其劳, 魏皓天. 基于分层控制的孤岛微电网储能优化控制策略[J]. 储能科学与技术, 2022, 11(1): 176-184.

Yu LI, Zhanqiang ZHANG, Keqilao MENG, Haotian WEI. Optimal control strategy for energy storage in island microgrid based on hierarchical control[J]. Energy Storage Science and Technology, 2022, 11(1): 176-184.

图/表 13

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图4

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图6

图7

图8

表1

模型参数取值"

参数	取值
直流母线基准电压 $u d c r e f$ /V	370
母线最大允许电压 $u d c r e f_m a x$ /V	385
母线最小允许电压 $u d c r e f_m i n$ /V	365
用户负载1额定功率 $P l o a d 1$ /W	700
用户负载2额定功率 $P l o a d 2$ /W	2200
用户负载3额定功率 $P l o a d 3$ /W	3600
储能电池1,2额定电压值/V	340
储能电池SOC1,2初始值/%	80
光伏电池光照强度/(W/ $m 2$ )	600

表1

图9

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图11

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基于分层控制的孤岛微电网储能优化控制策略

Optimal control strategy for energy storage in island microgrid based on hierarchical control

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