NDLI: Sliding mode controller-based voltage source inverter for power quality improvement in microgrid

Content Provider	IET Digital Library
Author	Rajakumar, Vinifa Anbukumar, Kavitha A, Immanuel Selwynraj
Abstract	Development of control technologies facilitates the integration of renewable energy sources to the grid through power electronic converters. In this study, the inverter acts as shunt active power filter along with the power conversion operation. Various sliding mode control (SMC) techniques namely relay and signum method, hysteresis method and equivalent control method are implemented to control the real, and reactive power flow between Renewable Energy System (RES), load and grid using an inverter. To reduce the complexity, the control law (u eq) for equivalent control method is derived using a simple single-phase equivalent circuit of a three-phase voltage source inverter. In this study, the robustness is enhanced by choosing the integral sliding surface. These controllers are used to reduce the total harmonic distortion (THD) and to ensure unity power factor (PF) in the grid during balanced and unbalanced grid voltage conditions even in the existence of nonlinear loads. The SMC using equivalent control function outperforms the other methods in terms of chattering, THD and PF. To illustrate the effectiveness, three different modes are considered: (i) no RES power, (ii) insufficient RES power and (iii) excess RES power. The performance of controllers is validated by the simulation and experimental results.
Starting Page	1860
Ending Page	1872
Page Count	13
ISSN	17521416
Volume Number	14
e-ISSN	17521424
Issue Number	Issue 11, Aug (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/14/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.1305
Journal	IET Renewable Power Generation
Publisher Date	2020-04-30
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Filter Balanced Grid Voltage Condition Chattering Complexity Reduction Control Law Control Nonlinearities Control of Electric Power System Control Technology Distributed Power Generation Equivalent Control Function Equivalent Control Method Grid Current Grid Interfacing Inverter Harmonic Distortion Harmonics High Performance Power Electronic Converter Hysteresis Method Integral Sliding Surface Invertors Load Flow Control Microgrid System Multivariable Control System Nonlinear Control System Nonlinear Load Other Power Apparatus And Electric Machine Power Conversion Operation Power Converter Power Electronics Power Factor Power Flow Control Power Generation Control Power Grid Power Harmonic Filter Power Quality Improvement Power Quality Issues Power Supply Quality Power System Control Power System Economics Power System Managemen Power System Operation Reactive Power Relay Method Renewable Energy Source Renewable Energy System RES Power Shunt Active Power Filter Signum Method Single-phase Equivalent Circuit Sliding Mode Controller-based Voltage Source Inverter SMC Technique THD Three-phase Voltage Source Inverter Total Harmonic Distortion Unbalanced Grid Voltage Condition Unity Power Factor Variable Structure System Voltage-source Converter
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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