PI and fuzzy logic controllers for shunt Active Power Filter--a report

Area of Science:

• Electrical Engineering
• Power Systems
• Control Systems

Background:

• Power quality issues like harmonics and reactive power are prevalent in distribution networks.
• Traditional compensation methods often involve complex sensor arrangements and control strategies.

Purpose of the Study:

• To present a novel shunt Active Power Filter (APF) for improved power quality.
• To reduce system complexity and sensor requirements through source current extraction.
• To introduce an Adaptive-Fuzzy Hysteresis Current Controller (A-F-HCC) for enhanced performance.

Main Methods:

• Implementation of a shunt APF using a Voltage Source Inverter (VSI).
• Utilization of Proportional Integral (PI) or Fuzzy Logic Controller (FLC) for reference current extraction.
• Generation of switching patterns via a novel Adaptive-Fuzzy Hysteresis Current Controller (A-F-HCC).
• Validation through simulations with diode-rectifier/R-L loads.

Main Results:

• The proposed A-F-HCC demonstrates superior performance compared to fixed and adaptive hysteresis controllers.
• The source current extraction method simplifies the APF system and reduces sensor count.
• FLC-based APF effectively compensates for harmonics and reactive power.

Conclusions:

• The novel A-F-HCC offers a robust and efficient solution for power quality improvement.
• The simplified sensor-based control enhances the practicality of shunt APFs in distribution networks.
• The developed system effectively mitigates power quality issues in various load conditions.