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浙江大学学报(工学版)
浙江大学学报(工学版)  2024, Vol. 58 Issue (10): 2171-2181    DOI: 10.3785/j.issn.1008-973X.2024.10.021
电子与电气工程     
基于滑模自抗扰的储能变流器控制策略
皇金锋(),周杰,黄红杰
陕西理工大学 电气工程学院，陕西 汉中 723001
Control strategy of power conversion system based on sliding mode active disturbance rejection control
Jinfeng HUANG(),Jie ZHOU,Hongjie HUANG
School of Electrical Engineering, Shaanxi University of Technology, Hanzhong 723001, China
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摘要：

为了提高储能变流器(PCS)的动态性能，设计基于降阶级联扩张状态观测器(ESO)和互补滑模控制(CSMC)的改进自抗扰控制(ADRC)策略，将改进ADRC策略应用于PCS的双向DC/AC变流器电压外环. 改进ESO为降阶级联ESO以提高状态变量和系统总扰动的估计速度，增加扰动估计能力；更改PD控制为CSMC以设计状态误差反馈律，提升PCS的系统鲁棒性；设计改进指数趋近律以抑制抖振现象. 为了证明改进ADRC策略相较于PI控制和传统ADRC的优越性，建立仿真模型并搭建相关实验平台. 仿真与实验结果表明，改进ADRC策略减小了PCS暂态时直流母线电压波动，提高了PCS交流侧功率响应速度，改善了交流侧的输出电能质量.
关键词： 储能变流器（PCS）;  自抗扰控制（ADRC）;  降阶级联扩张状态观测器;  互补滑模控制（CSMC）;  改进指数趋近律    
Abstract:

In order to improve the dynamic performance of the power conversion system (PCS), an improved active disturbance rejection control (ADRC) strategy based on reduced-order cascaded extended state observer (ESO) and complementary sliding mode control (CSMC) was designed and applied to the voltage outer loop of the bidirectional DC/AC converter in the PCS. The ESO was modified to a reduced-order cascaded ESO to improve the estimation speed of the state variables and the overall disturbance, enhancing the disturbance estimation capability. The PD control was replaced with CSMC to design a state error feedback law to enhance the robustness of the system, and an improved exponential reaching law was designed to suppress the chattering phenomenon. A simulation model was established and a related experimental platform was built to demonstrate the superiority of the improved ADRC strategy compared to PI control and traditional ADRC. The simulation and experimental results show that the improved ADRC strategy reduces the fluctuation of the DC bus voltage during the transient operation of the PCS, improves the power response speed on the AC side of the PCS, and enhances the output power quality on the AC side.
Key words: power conversion system (PCS)    active disturbance rejection control (ADRC)    reduced-order cascaded extended state observer    complementary sliding mode control (CSMC)    improved exponential reaching law
收稿日期: 2023-09-19 出版日期: 2024-09-27
CLC:  TM 46  
基金资助: 陕西省自然科学研究资助项目（2023-JC-YB-442）.
作者简介: 皇金锋（1978—），男，教授，硕导，从事电力电子变换器的非线性控制研究. orcid.org/0000-0003-4846-3699. E-mail：jfhuang2000@163.com
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引用本文:

皇金锋,周杰,黄红杰. 基于滑模自抗扰的储能变流器控制策略[J]. 浙江大学学报(工学版), 2024, 58(10): 2171-2181.

Jinfeng HUANG,Jie ZHOU,Hongjie HUANG. Control strategy of power conversion system based on sliding mode active disturbance rejection control. Journal of ZheJiang University (Engineering Science), 2024, 58(10): 2171-2181.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2024.10.021    或    https://www.zjujournals.com/eng/CN/Y2024/V58/I10/2171

图 1  储能变流器的电路拓扑结构
图 2  降阶级联扩张状态观测器控制策略框图
图 3  不同观测器的扰动估计能力
图 4  斜坡扰动的估计误差
图 5  改进指数趋近律函数的图像对比
图 6  互补滑模控制策略框图
图 7  不同指数趋近律下滑模面随时间的变化
图 8  储能变流器的框图
参 数数 值参 数数 值
电网电压幅值/V311直流稳压电容C/mF2.2
直流母线电压udc/V700电池额定容量/（A·h）100
滤波电感L/mH1.0电池标称电压vbat/V400
电路等效电阻R/Ω0.01电池初始荷电状态SOC/%50
表 1  电路拓扑参数
图 9  参数摄动时直流母线电压波形对比
图 10  稳态时交流侧电流总谐波失真对比
图 11  硬件在环测试系统
策略控制对象参数
PIDC/AC电压外环kp=20、ki=5
DC/AC电流内环kpd=kpq=40、kid=kiq=0.5
DC/DCkpb=0.1、kib=10
传统ADRCDC/AC电压外环ω0=600、ωc=1200
改进ADRCDC/AC电压外环ω0=600、η=300、q=25、ε=20
表 2  控制电路参数
图 12  实验对比典型工况
图 13  不同控制策略在工况一下的实验波形
图 14  不同控制策略在工况二下的实验波形
图 15  不同控制策略在工况一下的电流响应
图 16  不同控制策略在工况二下的电流响应
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