基于自抗扰控制的直流微电网双向Buck-Boost变换器控制策略研究

doi:10.12096/j.2096-4528.pgt.20123

发电技术 ›› 2021, Vol. 42 ›› Issue (2): 193-200.DOI: 10.12096/j.2096-4528.pgt.20123

基于自抗扰控制的直流微电网双向Buck-Boost变换器控制策略研究

卢昕¹(), 陈众励²(), 李辉¹^,*()

¹ 上海电力大学自动化工程学院, 上海市杨浦区 200090
² 上海建筑设计研究院有限公司, 上海市静安区 200041

收稿日期:2020-12-21 出版日期:2021-04-30 发布日期:2021-04-29
通讯作者: 李辉
作者简介:卢昕(1995), 女, 硕士研究生, 研究方向为微电网控制, luxin_xsyu@sina.com
陈众励(1963), 男, 硕士, 教授级高工, 研究方向为智能建筑技术, zhongli_chen@arcplus.com.cn
基金资助:
上海市军民融合发展专项项目(2019-jmrh1-kj40)

Research on Control Strategy of Bidirectional Buck-Boost Converter in DC Microgrid Based on Active Disturbance Rejection Control

Xin LU¹(), Zhongli CHEN²(), Hui LI¹^,*()

¹ College of Automation Engineering, Shanghai University of Electric Power, Yangpu District, Shanghai 200090, China
² Institute of Shanghai Architectural Design and Research Co., Ltd., Jing'an District, Shanghai 200041, China

Received:2020-12-21 Published:2021-04-30 Online:2021-04-29
Contact: Hui LI
Supported by:
Shanghai Civil Military Integration Development Project(2019-jmrh1-kj40)

摘要/Abstract

摘要：

为了降低直流微电网母线电压的波动，提出基于自抗扰控制的双向Buck-Boost变换器控制策略。运用直流母线电压外环、直流变换器电感电流内环的控制方法实现直流微电网与储能系统之间的能量双向流动。进一步提出基于扩张状态观测器观测输出总扰动，包括负载电流和母线电压的变化，在负载扰动电流影响系统的直流母线电压最终输出前，主动从外环被控对象的输入信号电感电流或输出信号母线电压中提取扰动信息，然后尽快用控制信号将其消除，从而大大降低其对被控量的影响，以有效抑制暂态直流母线的电压波动和冲击，在母线电压产生波动时能够快速恢复到正常的工作状态。仿真验证表明：储能系统可以通过控制策略实现能量的双向传递，并且当母线产生功率波动和电流冲击时，储能系统可以使直流母线电压稳定，提高了系统的可靠性。

关键词: 直流微电网, 双向Buck-Boost变换器, 母线电压波动, 自抗扰控制(ADRC)

Abstract:

In order to reduce the fluctuation of DC microgrid bus voltage, a bidirectional Buck-Boost converter control strategy based on active disturbance rejection control (ADRC) was proposed. The control method of DC bus voltage outer loop and DC converter inductance current inner loop was used to realize the bidirectional flow of energy between the DC microgrid and the energy storage system. It was further proposed to observe the total output disturbance based on the extended state observer (ESO), including the change of load current and bus voltage. Before the load disturbance current affects the final output of the DC bus voltage of the system, the disturbance information was actively extract from the input signal inductance current or the output signal bus voltage of the controlled object in the outer loop. Then, the control signal was used to eliminate the disturbance information as soon as possible, which reduces the influence on the controlled quantity, and further suppresses the voltage fluctuation and impact of the transient DC bus. Therefore, the bus voltage can quickly recover to the normal working state when the bus voltage fluctuates. The correctness of the proposed control strategy was verified by simulation. The simulation results show that the energy storage system can achieve bidirectional energy transfer through the control strategy. In addition, when the bus generates power fluctuations and current shocks, the energy storage system can stabilize the DC bus voltage and improve the system the reliability.

Key words: DC microgrid, bidirectional Buck-Boost converter, bus voltage fluctuation, active disturbance rejection controller (ADRC)

中图分类号:

TK01
TM46

卢昕, 陈众励, 李辉. 基于自抗扰控制的直流微电网双向Buck-Boost变换器控制策略研究[J]. 发电技术, 2021, 42(2): 193-200.

Xin LU, Zhongli CHEN, Hui LI. Research on Control Strategy of Bidirectional Buck-Boost Converter in DC Microgrid Based on Active Disturbance Rejection Control[J]. Power Generation Technology, 2021, 42(2): 193-200.

图/表 10

图1 直流微电网结构图

Fig.1 DC microgrid structure diagram

图2 简化的直流微电网结构图

Fig.2 Simplified DC microgrid structure diagram

图3 常规直流母线电压控制结构

Fig.3 Conventional DC bus voltage control structure

图4 采用了LADRC控制器的控制框图

Fig.4 Control block diagram with LADRC controller

表1 直流微电网模型系统参数

Tab. 1 DC microgrid model system parameters

参数	数值	参数	数值
母线电压u_dc/V	100	电容C/μF	200
储能电池输出电压u_b/V	48	电容C_b/μF	200
恒功率源输出电流i_cps/A	10	电感L/mH	0.2
恒功率负载P/kW	0.45	电阻R/Ω	50

表2 控制器参数

Tab. 2 Controller parameters

控制器	参数	数值
双环PI控制器	k_{p_in}	10
	k_{i_in}	100
	k_{p_out}	60
	k_{i_out}	600
外环LADRC内环PI控制器	k_{p_in}	10
	k_{i_in}	100
	ω_c/(rad/s)	2 000
	ω_o/(rad/s)	10 000
	b₀	2 400

图5 Bode图对比

Fig.5 Comparison of Bode diagrams

图6 变化工况

Fig.6 Changing conditions

图7 输出电压响应

Fig.7 Response of output voltage

图8 电感电流响应

Fig.8 Response of inductor current

参考文献 19

1	李霞林, 郭力, 冯一彬, 等. 基于非线性干扰观测器的直流微电网母线电压控制[J]. 中国电机工程学报, 2016, 36 (2): 350- 359.
	LI X L , GUO L , FENG Y B , et al. A nonlinear disturbance observer based DC bus voltage control for a DC microgrid[J]. Proceedings of the CSEE, 2016, 36 (2): 350- 359.
2	王成山, 李微, 王议锋, 等. 直流微电网母线电压波动分类及抑制方法综述[J]. 中国电机工程学报, 2017, 37 (1): 84- 98.
	WANG C S , LI W , WANG Y F , et al. Summary of classification and suppression methods of bus voltage fluctuation in DC microgrid[J]. Proceedings of the CSEE, 2017, 37 (1): 84- 98.
3	赵忠斌, 张靖, 马蕊, 等. 互联直流微电网多模式协调控制策略[J]. 智慧电力, 2020, 48 (4): 28- 35.
	ZHAO Z B , ZHANG J , MA R , et al. Multi-mode coordinated control strategy of interconnected DC microgrid[J]. Smart Power, 2020, 48 (4): 28- 35.
4	姜碧佳, 叶远茂. 直流微电网的控制技术综述[J]. 广东电力, 2020, 33 (5): 1- 10.
	JIANG B J , YE Y M . Overview on control techniques of DC micro-grid[J]. Guangdong Electric Power, 2020, 33 (5): 1- 10.
5	王久和, 王勉, 吴学智, 等. 直流分布式电源系统稳定性判据研究综述[J]. 发电技术, 2020, 41 (2): 175- 185.
	WANG J H , WANG M , WU X Z , et al. Review of stability criteria study for direct current distributed power system[J]. Power Generation Technology, 2020, 41 (2): 175- 185.
6	王冕, 田野, 李铁民, 等. 应用于储能系统的双向DC-DC变换器研究[J]. 电工技术学报, 2013, 28 (8): 66- 71.
	WANG M , TIAN Y , LI T M , et al. Study of bidirectional DC⁃DC converters applied to energy storage system[J]. Transactions of China Electrotechnical Society, 2013, 28 (8): 66- 71.
7	张纯江, 董杰, 刘君, 等. 蓄电池与超级电容混合储能系统的控制策略[J]. 电工技术学报, 2014, 29 (4): 334- 340.
	ZHANG C J , DONG J , LIU J , et al. Control strategy of hybrid energy storage system with battery and super capacitor[J]. Transactions of China Electrotechnical Society, 2014, 29 (4): 334- 340.
8	陈洪涛, 胡健, 韩小雨, 等. 直流微电网内DC/DC变换器非线性控制策略研究[J]. 现代电子技术, 2019, 42 (4): 153- 157.
	CHEN H T , HU J , HAN X Y , et al. Research on nonlinear control strategy of DC/DC converters in DC microgrid[J]. Modern Electronic Technology, 2019, 42 (4): 153- 157.
9	SHAO X Y , HU J , ZHAO Z T . Stabilisation strategy based on feedback linearisation for DC microgrid with multi-converter[J]. The Journal of Engineering, 2019, 2019 (16): 1802- 1806.
10	张国驹, 唐西胜, 周龙, 等. 基于互补PWM控制的Buck/Boost双向变换器在超级电容器储能中的应用[J]. 中国电机工程学报, 2011, 31 (6): 15- 21.
	ZHANG G J , TANG X S , ZHOU L , et al. Application of Buck/Boost bidirectional converter based on complementary PWM control in supercapacitor energy storage[J]. Proceedings of the CSEE, 2011, 31 (6): 15- 21.
11	韩京清. 从PID技术到"自抗扰控制"技术[J]. 控制工程, 2002, 9 (3): 13- 18.
	HAN J Q . From PID technology to "auto-disturbance rejection control" technology[J]. Control Engineering, 2002, 9 (3): 13- 18.
12	王丽君, 李擎, 童朝南, 等. 时滞系统的自抗扰控制综述[J]. 控制理论与应用, 2013, 30 (012): 1521- 1533.
	WANG L J , LI Q , TONG C N , et al. Overview of active disturbance rejection control for time-delay systems[J]. Control Theory and Applications, 2013, 30 (12): 1521- 1533.
13	钱梦然, 李辉, 刘新秀. 基于自抗扰控制的微电网三相不平衡问题研究[J]. 发电技术, 2020, 41 (2): 160- 166.
	QIAN M R , LI H , LIU X X . Research on three-phase unbalance of micro-grid based on active disturbance rejection control[J]. Power Generation Technology, 2020, 41 (2): 160- 166.
14	马步云, 王婧, 翟化欣, 等. 基于自抗扰技术的储能装置的能量控制器的设计[J]. 华北电力技术, 2016, (9): 28- 34.
	MA B Y , WANG J , ZHAI H X , et al. Design of energy controller of energy storage device based on active disturbance rejection technology[J]. North China Electric Power Technology, 2016, (9): 28- 34.
15	沈德明, 姚冰, 祖利辉, 等. 基于线性自抗扰控制技术的PMSM仿真研究[J]. 控制工程, 2016, 23 (S1): 51- 55.
	SHEN D , YAO B , ZU L H , et al. Simulation study of PMSM based on linear active disturbance rejection control technology[J]. Control Engineering, 2016, 23 (S1): 51- 55.
16	杨晨, 谢少军, 毛玲, 等. 基于双管Buck-Boost变换器的直流微电网光伏接口控制分析[J]. 电力系统自动化, 2012, 36 (13): 45- 50.
	YANG C , XIE S J , MAO L , et al. Analysis on control strategy of two-switch buck-boost converter for photovoltaic interface in DC microgrid[J]. Automation of Electric Power Systems, 2012, 36 (13): 45- 50.
17	李玉梅, 査晓明, 刘飞, 等. 带恒功率负荷的直流微电网母线电压稳定控制策略[J]. 电力自动化设备, 2014, 34 (8): 57- 64.
	LI Y M , ZHA X M , LIU F , et al. Stability control strategy for DC microgrid with constant power load[J]. Electric Power Automation Equipment, 2014, 34 (8): 57- 64.
18	舒恺, 刘峰, 郭高鹏, 等. 并网型直流微电网协调控制策略[J]. 电网与清洁能源, 2020, 36 (11): 58- 67.
	SHU K , LIU F , GUO G P , et al. The coordinated control strategy for grid-connected DC microgrid[J]. Power System and Clean Energy, 2020, 36 (11): 58- 67.
19	DRAGICEVIC 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, 2013, 29 (2): 695- 706.

基于自抗扰控制的直流微电网双向Buck-Boost变换器控制策略研究

Research on Control Strategy of Bidirectional Buck-Boost Converter in DC Microgrid Based on Active Disturbance Rejection Control

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 10

参考文献 19

相关文章 1

编辑推荐

Metrics

本文评价