Voltage Control of Microgrid Inverter Based on Improved Second-order Linear Active Disturbance Rejection Control

被引：0

作者：

Yang L. ^{[1
]}

Zeng J. ^{[1
]}

Ma W. ^{[1
]}

Huang Z. ^{[1
]}

机构：

[1] School of Electric Power, South China University of Technology, Guangzhou

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2019年 / 43卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Extended state observer (ESO); Frequency domain analysis; Lead-lag; Linear active disturbance rejection control (LADRC); Microgrid inverter; Stability analysis;

D O I：

10.7500/AEPS20180419002

中图分类号：

学科分类号：

摘要：

The microgrid inverter system is characterized by nonlinearity, strong coupling, violent disturbance and flexible switching mode. It is not easy to meet requirements through conventional dual loop control. As for the active disturbance rejection control (ADRC), all uncertainties of the system are regarded as total disturbances, which will be estimated and compensated dynamically. As a result, the complex system can be corrected to integral series type to achieve expected control performance. With the adoption of linear active disturbance rejection control (LADRC) technology with more engineering application value, this paper designs a second-order LADRC controller which takes the output voltage and its differential as state variables. Considering that the extended state observer (ESO) is the core of LADRC, the output voltage error derivative term is introduced to improve the observation capability of ESO. Further, a first-order inertial link is embedded into the total perturbation channel to avoid increasing observation noise. Frequency response characteristics of LADRC and typical dual loop control system show that the improved LADRC has a better disturbance rejection performance than the other two. Simulation and experimental results further prove the effectiveness of the proposed strategy. ©2019 Automation of Electric Power Systems Press.

引用

页码：146 / 153

页数：7

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