电力系统自动化2019，Vol.43Issue(4)：146-153,8.DOI:10.7500/AEPS20180419002
基于改进二阶线性自抗扰技术的微网逆变器电压控制
Voltage Control of Microgrid Inverter Based on Improved Second-order Linear Active Disturbance Rejection Control
摘要
Abstract
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.关键词
微网逆变器/线性自抗扰控制/扩张状态观测器/频域分析/超前滞后/稳定性分析Key words
microgrid inverter/linear active disturbance rejection control (LADRC)/extended state observer (ESO)/frequency domain analysis/lead-lag/stability analysis引用本文复制引用
杨林,曾江,马文杰,黄仲龙..基于改进二阶线性自抗扰技术的微网逆变器电压控制[J].电力系统自动化,2019,43(4):146-153,8.基金项目
国家自然科学基金资助项目(51777078) （51777078）
