NDLI: Direct synthesis and systematic design of a multi-objective controller for grid-connected inverters under weak grid conditions

Content Provider	IET Digital Library
Author	Raja, Parthiban Bhaskaran, Umamaheswari Shanmugam, Paramasivam
Abstract	A systematic approach for synthesis and tuning of the controller for grid-connected inverters with LCL-filter is proposed in this study. The design objectives like current tracking, harmonics rejection, resonant damping and extended stability over wide grid variations are addressed. Controller structure is synthesised by direct synthesis approach which leads to a systematic design procedure and tuning method. Low-frequency approximation of the system under worst grid condition is used for the synthesis of the current controller and the resonance component is handled separately. Tunable parameters are identified to investigate grid variations in the process of augmenting the synthesised controller for realisability. Complete design, stability analysis and tuning are dealt with directly in the discrete domain. Detailed simulation and experimental validation are carried out on a 1 kW prototype inverter. The method proposed in this study serves as a simplified design tool for effective design of a multi-objective controller for grid-connected inverters.
Starting Page	4507
Ending Page	4517
Page Count	11
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 19, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/19
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2019.1430
Journal	IET Power Electronics
Publisher Date	2021-01-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System Control System Analysis Control System Synthesis Controller Structure Current Control Current Controller Damping Design Objectives Direct Synthesis Approach Electric Current Control Grid-connected Inverter Invertors Multiobjective Controller Power 1 KW Power Grid Power System Control Power System Stability Simplified Design Tool Stability Analysis Stability in Control Theory Synthesis Method Synthesised Controller Systematic Design Procedure Tuning Method Weak Grid Condition Wide Grid Variations
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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