Next Article in Journal
Feasibility of Continuous Pretreatment of Corn Stover: A Comparison of Three Commercially Available Continuous Pulverizing Devices
Previous Article in Journal
Innovative Control Strategies for the Diagnosis of Injector Performance in an Internal Combustion Engine via Turbocharger Speed
Previous Article in Special Issue
A Trapezoidal Velocity Profile Generator for Position Control Using a Feedback Strategy
Article Menu

Export Article

Open AccessArticle
Energies 2019, 12(8), 1421; https://doi.org/10.3390/en12081421

Observer-Based Sliding Mode Control to Improve Stability of Three-Phase LCL-Filtered Grid-Connected VSIs

1
Department of Electrical Engineering, Shanghai Maritime University, Shanghai 201306, China
2
Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark
*
Author to whom correspondence should be addressed.
Received: 2 March 2019 / Revised: 28 March 2019 / Accepted: 4 April 2019 / Published: 12 April 2019
(This article belongs to the Special Issue Control in Power Electronics)
  |  
PDF [4701 KB, uploaded 15 April 2019]
  |  

Abstract

Grid-connected voltage source inverters (VSIs) with LCL filters have been widely used for distributed generation systems (DGs). Various control methods have been studied to achieve good performance. Among them, sliding mode control has been applied to LCL-filtered grid-connected VSIs for its fast, dynamic response and strong robustness. However, LCL networks can easily cause instability problems under weak grid conditions such as grid impedance variation. At the same time, the stability design of sliding mode control applied for LCL-filtered grid-connected inverters are important, but they lack detailed parameters design in recent papers. In this paper, a design of observer-based sliding mode control to improve the stability of three-phase LCL-filtered grid-connected VSIs was proposed. The theoretical stability analysis was developed to consider the effect of the system discretization and grid impedance variations. Finally, a 3-kW, 110-V, 50-Hz experimental setup has been built to demonstrate the validation of the proposed method. View Full-Text
Keywords: LCL filter; grid-connected inverters; observer; sliding mode control; stability analysis; robustness LCL filter; grid-connected inverters; observer; sliding mode control; stability analysis; robustness
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Huang, M.; Li, H.; Wu, W.; Blaabjerg, F. Observer-Based Sliding Mode Control to Improve Stability of Three-Phase LCL-Filtered Grid-Connected VSIs. Energies 2019, 12, 1421.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top