Author:
Benrabah Abdeldjabar,Xu Dianguo
Abstract
Purpose
The purpose of this study is to improve the control performance of grid-connected photovoltaic (PV) inverters with inductive-capacitive-inductive (LCL) filters by proposing a new robust current control based on uncertainty and disturbance estimator (UDE).
Design/methodology/approach
The control strategy combines the capacitor current feedback with a UDE-based control to solve robust stability issues in the presence of parametric uncertainties and disturbances.
Findings
This paper provides guidelines for tuning the controller parameters where it is shown to be easy to implement by simply selecting the appropriate feedback coefficient, the reference model and an approximate lumped disturbance bandwidth. Simulation and experimental results demonstrate the effectiveness of the proposed controller in terms of resonance damping, tracking performance and robust stability under grid uncertainties and disturbances.
Practical implications
This paper offers a new approach for designing implementable robust controllers for LCL-filtered grid-connected PV inverters.
Originality/value
A new UDE-based current control is proposed to improve the stability performance of grid-connected PV inverters. The advantages of UDE-based control are its simple structure, easy tuning and robustness under parameter uncertainties and disturbances. Simulation and experimental results support the theoretical findings.
Subject
Applied Mathematics,Electrical and Electronic Engineering,Computational Theory and Mathematics,Computer Science Applications
Reference26 articles.
1. Step-by-step controller design for LCL-type grid-connected inverter with capacitor–current-feedback active-damping;IEEE Transactions on Power Electronics,2014
2. Simplified feedback linearization control of three-phase photovoltaic inverter with an LCL filter;IEEE Transactions on Power Electronics,2013
3. Robust observer based active damping control for LCL filtered grid connected converters using LMI criterion,2016
4. Robust active damping control of LCL filtered grid connected converter based active disturbance rejection control,2016
5. A review of passive power filters for three-phase grid-connected voltage-source converters;IEEE Journal of Emerging and Selected Topics in Power Electronics,2016
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献