基于前馈自抗扰的光伏微电网混合储能控制策略

doi:10.12204/j.issn.1000-7229.2021.09.010

摘要/Abstract

摘要：

针对光伏微电网混合储能系统中储能设备间的功率分频分配有效性差和抗干扰能力较弱等问题,提出一种基于前馈自抗扰控制(feedforward linear active disturbance rejection control,FF-LADRC)的光伏微电网混合储能控制策略。首先,搭建混合储能系统中蓄电池和超级电容的双向DC-DC数学模型,通过在电压环控制中引入前馈自抗扰控制,以提高混合储能系统的动态响应速度和抗干扰性能,并通过设置低通滤波,进而实现不同储能设备之间的功率分频分配。同时,将线性自抗扰控制分别引入蓄电池电流环控制和超级电容电流环控制,以实现不同储能设备间的协调控制,进而提高并网侧功率稳定性。频域分析结果证明了所提控制策略的有效性和稳定性。仿真结果表明,所提控制策略能够快速进行功率分频分配,同时协调光伏微电网有效运行。

关键词: 前馈自抗扰控制(FF-LADRC), 光伏微电网, 双向DC-DC变换器, 混合储能系统, 低通滤波

Abstract:

Aiming at the problems of poor efficiency and weak anti-interference ability of energy-storage devices in the hybrid energy storage system of photovoltaic microgrid, this paper proposes an energy storage control strategy for hybrid photovoltaic microgrid applying the technology of feedforward linear active disturbance rejection control (FF-LADRC). Firstly, a bi-directional DC-DC mathematical model of the battery and super capacitor in the hybrid energy storage system is built. By introducing feedforward active disturbance control in the voltage loop control, the dynamic response speed and anti-jamming performance of the hybrid energy storage system are improved. A low-pass filter is set up to achieve power frequency division between different energy storage devices. At the same time, linear active disturbance rejection control is introduced into battery current loop and super capacitor current loop control to achieve coordinated control between different energy storage devices, thereby improving the power stability of the grid-connected side. The results of frequency domain analysis prove the effectiveness and stability of the proposed control strategy. The simulation results show that the proposed control strategy can quickly perform power frequency division distribution and coordinate the effective operation of the photovoltaic microgrid.

Key words: feedforward linear active disturbance rejection control (FF-LADRC), photovoltaic microgrid, bi-directional DC-DC converter, hybrid energy storage system, low-pass filtering

中图分类号:

TM712

刘志坚, 李晓磊, 梁宁, 郑峰, 伍仰金, 张婷婷. 基于前馈自抗扰的光伏微电网混合储能控制策略[J]. 电力建设, 2021, 42(9): 96-104.

LIU Zhijian, LI Xiaolei, LIANG Ning, ZHENG Feng, WU Yangjin, ZHANG Tingting. Control Strategy of Hybrid Energy Storage for Photovolatic Microgrid Applying Feedforward Active Disturbance Rejection[J]. ELECTRIC POWER CONSTRUCTION, 2021, 42(9): 96-104.

图/表 10

图1 混合储能控制策略整体结构

Fig.1 Overall structure of a hybrid energy-storage control strategy

图2 前馈自抗扰电压环控制结构

Fig.2 Feedforward of the voltage loop control structure of active disturbance rejection

图3 线性自抗扰蓄电池电流环控制结构

Fig.3 Current loop control structure of linear active disturbance rejection battery

图4 线性自抗扰超级电容电流环控制结构

Fig.4 Current loop control structure of linear active disturbance rejection supercapacitor

图5 ω0-ba变化下的频域特性曲线分析

Fig.5 Frequency domain characteristic curve under ω0-ba change

图6 ω1-ba变化下的频域特性曲线分析

Fig.6 Frequency domain characteristic curve under ω1-ba change

图7 b0-ba变化下的频域特性曲线分析

Fig.7 Frequency domain characteristic curve under b0-ba change

图8 光伏微电网混合储能系统结构

Fig.8 Structure of hybrid energy storage system in photovoltaic microgrid

图9 负荷阶跃变化下的系统响应

Fig.9 System response under load step change

图10 光伏出力变化下的储能设备响应

Fig.10 Response of energy storage devices under changes in photovoltaic output

参考文献 20

[1]	曹永锋, 武玉衡, 叶永强, 等. 基于微分前馈自抗扰的逆变器控制策略[J]. 电力系统自动化, 2019, 43(5):136-142, 166.
	CAO Yongfeng, WU Yuheng, YE Yongqiang, et al. Active disturbance rejection control strategy with differential feedforward for inverters[J]. Automation of Electric Power Systems, 2019, 43(5):136-142, 166.
[2]	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, 7118.
	ZHOU Jianyu, YAN Linfang, LIU Ju, et al. A cooperative control strategy for DC microgrid based on consensus algorithm[J]. Proceedings of the CSEE, 2018, 38(23):6837-6846, 7118.
[3]	HE H C, SI T T, SUN L, et al. Linear active disturbance rejection control for three-phase voltage-source PWM rectifier[J]. IEEE Access, 2020, 8:45050-45060. doi: 10.1109/Access.6287639 URL
[4]	刘忠, 杨陈, 蒋玮, 等. 基于一致性算法的直流微电网储能系统功率分配技术[J]. 电力系统自动化, 2020, 44(7):61-69.
	LIU Zhong, YANG Chen, JIANG Wei, et al. Consensus algorithm based power distribution technology for energy storage system in DC microgrid[J]. Automation of Electric Power Systems, 2020, 44(7):61-69.
[5]	李志华, 曾江, 黄骏翅, 等. 基于线性自抗扰控制的微网逆变器时-频电压控制策略[J]. 电力系统自动化, 2020, 44(10):145-154.
	LI Zhihua, ZENG Jiang, HUANG Junchi, et al. Time-frequency voltage control strategy of microgrid inverter based on linear active disturbance rejection control[J]. Automation of Electric Power Systems, 2020, 44(10):145-154.
[6]	张继元, 舒杰, 宁佳, 等. 考虑SOC自均衡的光储独立微电网协调控制[J]. 电工技术学报, 2018, 33(S2):527-537.
	ZHANG Jiyuan, SHU Jie, NING Jia, et al. Coordinated control for PV/storage hybrid islanded microgrid considering SOC balancing[J]. Transactions of China Electrotechnical Society, 2018, 33(S2):527-537.
[7]	杨惠, 骆姗, 孙向东, 等. 光伏储能双向DC-DC变换器的自抗扰控制方法研究[J]. 太阳能学报, 2018, 39(5):1342-1350.
	YANG Hui, LUO Shan, SUN Xiangdong, et al. Research on adrc method for bidirectional dc-dc converter of solar energy storage system[J]. Acta Energiae Solaris Sinica, 2018, 39(5):1342-1350.
[8]	白洁. 蓄电池与超级电容混合储能系统功率控制研究[D]. 秦皇岛: 燕山大学, 2019.
	BAI Jie. Research on power control of hybrid energy storage system of battery and super capacitor[D]. Qinhuangdao: Yanshan University, 2019.
[9]	朱进权, 葛琼璇, 孙鹏琨, 等. 基于自抗扰的高速磁浮列车牵引控制策略[J]. 电工技术学报, 2020, 35(5):1065-1074.
	ZHU Jinquan, GE Qiongxuan, SUN Pengkun, et al. Traction-system research of high-speed maglev based on active disturbance rejection control[J]. Transactions of China Electrotechnical Society, 2020, 35(5):1065-1074.
[10]	GAO Z Q. Scaling and bandwidth -parameterization based controller tunnin[C]// IEEE 2003 American Control Conference. Denver, USA: IEEE, 2003: 4989-4996.
[11]	BI K, YANG W, XU D, et al. Dynamic SOC balance strategy for modular energy storage system based on adaptive droop control[J]. IEEE Access, 2020, PP(99):1-1.
[12]	孙斌, 王海霞, 苏涛, 等. 永磁同步电机调速系统非线性自抗扰控制器设计与参数整定[J]. 中国电机工程学报, 2020, 40(20):6715-6725.
	SUN Bin, WANG Haixia, SU Tao, et al. Nonlinear active disturbance rejection controller design and tuning for permanent magnet synchronous motor speed control system[J]. Proceedings of the CSEE, 2020, 40(20):6715-6725.
[13]	毕晓辉. 微电网混合储能系统控制策略研究[D]. 重庆: 重庆大学, 2016.
	BI Xiaohui. Research on control strategy of hybrid energy storage of microgrid[D]. Chongqing: Chongqing University, 2016.
[14]	刘科正, 刘国荣, 张真源, 等. 一种新型风电混合储能系统模糊协调控制方法[J]. 电力系统及其自动化学报, 2020, 32(12):124-133.
	LIU Kezheng, LIU Guorong, ZHANG Zhenyuan, et al. Novel fuzzy coordination control method for wind power hybrid energy storage system[J]. Proceedings of the CSU-EPSA, 2020, 32(12):124-133.
[15]	ZHAO C, YIN H, MA C B. Equivalent series resistance-based real-time control of battery-ultracapacitor hybrid energy storage systems[J]. IEEE Transactions on Industrial Electronics, 2020, 67(3):1999-2008. doi: 10.1109/TIE.41 URL
[16]	WANG L, WANG Y J, LIU C, et al. A power distribution strategy for hybrid energy storage system using adaptive model predictive control[J]. IEEE Transactions on Power Electronics, 2020, 35(6):5897-5906. doi: 10.1109/TPEL.63 URL
[17]	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.
[18]	张步云, 王晋宁, 梁定康, 等. 采用一致性算法的自治微电网群分布式储能优化控制策略[J]. 电网技术, 2020, 44(5):1705-1713.
	ZHANG Buyun, WANG Jinning, LIANG Dingkang, et al. Optimization control strategy of distributed energy storage in autonomous microgrid cluster on consensus algorithm[J]. Power System Technology, 2020, 44(5):1705-1713.
[19]	田艳军, 彭飞, 朱晓荣, 等. 直流微网储能单元的灵活类虚拟同步发电机控制[J]. 高电压技术, 2020, 46(7):2316-2326.
	TIAN Yanjun, PENG Fei, ZHU Xiaorong, et al. Flexible analogous virtual synchronous generator control for energy storage units in DC microgrid[J]. High Voltage Engineering, 2020, 46(7):2316-2326.
[20]	严干贵, 朱微, 段双明, 等. 考虑铅炭电池组一致性的储能系统功率控制策略[J]. 电力系统自动化, 2020, 44(11):61-67.
	YAN Gangui, ZHU Wei, DUAN Shuangming, et al. Power control strategy of energy storage system considering consistency of lead carbon battery pack[J]. Automation of Electric Power Systems, 2020, 44(11):61-67.