Design of a grid-tied inverter and LCL filter for photovoltaic application
Jeziorczak, Victoria
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https://hdl.handle.net/2142/129190
Description
Title
Design of a grid-tied inverter and LCL filter for photovoltaic application
Author(s)
Jeziorczak, Victoria
Issue Date
2025-05-09
Director of Research (if dissertation) or Advisor (if thesis)
Banerjee, Arijit
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
LCL filter
Grid-tied inverter
AC-DC
DC-link capacitor
THD
Abstract
Grid-tied inverters inject harmonics into the grid when using high-frequency PWM, reducing the grid’s energy quality. Therefore, a filter is required between the power inverter and the utility grid to ensure quality energy that abides by IEEE standards for grid integration. This paper proposes a 4kW, 400V grid-tied inverter and LCL filter design to interface an array of solar panels to the utility grid. The theory of the two-level, three-phase power inverter and its filter, along with their corresponding designs, is analyzed. Filter selection is discussed, in addition to a filter damping method using a resistor in series. Design, simulation, and experimental tests demonstrate the mathematical theory of the selected LCL filter.
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