基于扰动补偿线性自抗扰的直流微电网接口变换器寻优控制
Optimization Control of the DC Microgrid Interface Converter Based on Disturbance Compensation and Linear Active Disturbance Rejection Control
侯峰 1冯洋 1刘垚 1郭帅朝 2周雪松2
作者信息
- 1. 国网宁夏电力有限公司培训中心,宁夏银川 750011
- 2. 天津理工大学 天津 300382
- 折叠
摘要
针对直流微电网接口处三相六路变换器在负载突变以及系统功率下降等多种扰动下引起的接口处电压振荡问题,提出一种以扰动补偿线性自抗扰和模糊控制优化算法相结合的模糊扰动补偿线性自抗扰控制策略.根据接口变换器的电路拓扑建立数学模型,并设计线性自抗扰控制对其进行控制;在观测器数学模型中引入扰动补偿环节,用于抵消扰动输入为斜坡函数时的扰动误差,提高观测器的扰动观测能力和观测精度;引入模糊控制优化算法对控制器参数进行优化调节,使控制器具备参数自主优化能力;搭建数字仿真模型进行实验验证,并与PI、LADRC相对比.实验结果显示:所提控制策略既具备了优异的接口处电压振荡抑制能力,又使系统获得了优异的鲁棒性.
Abstract
For the voltage oscillation caused by various disturbances such as load mutation and system power decrease at the interface of the DC microgrid,an optimization compensation linear auto-disturbance rejection control strategy combining disturbance compensation linear auto-disturbance rejection and fuzzy control optimization algorithm is proposed in this paper.First,a mathematical model is established based on the circuit topology of the interface converter,and linear auto-disturbance rejection control is designed to control it.Second,disturbance compensation is introduced into the mathematical model of the observer to counteract the disturbance error when the disturbance input is a slope function,thereby improving the observer's disturbance observation ability and accuracy.Furthermore,a fuzzy control optimization algorithm is introduced to optimize and adjust the controller parameters,enabling the controller to have the ability to autonomously optimize parameters.Finally,a digital simulation model is established for experimental verification and comparing it with PI and LADRC.The experimental results show that the proposed control strategy not only has excellent voltage oscillation suppression ability at the interface,but also achieves excellent robustness of the system.
关键词
直流微电网/三相六路变换器/线性自抗扰/模糊控制Key words
DC microgrid/three phase six circuit converter/linear active disturbance rejection control/fuzzy control引用本文复制引用
出版年
2024
NETL
NSTL
万方数据