Abstract
This paper presents a comparative Analysis between various Control techniques such as Hysteresis and Hysteresis-fuzzy combined control technique with different fuzzy-rule applied in Shunt Hybrid filter for reduction of harmonics in a distribution generation to increase the power quality, An indirect current control technique along with Hysteresis current control strategy is implemented to generate switching signal used for turning on and off of the insulated gate bipolar transistor used in the shunt hybrid active filter, Again Fuzzy-hysteresis band technique is adopted for the current control to derive the switching signal for the voltage source inverter. The fuzzy-hysteresis band current control changes the hysteresis band width according to the supply voltage and the slope of the reference compensator current wave. A Fuzzy-logic based controller is developed to control the voltage of the DC Capacitor with different fuzzy rule such as 7/7 and 5/5, Simulation results are obtained and compared with each other, In hysteresis current control technique Total Harmonics Distortion is 10.12% of the Fundamental which is Decreases to a Value of 0.19 % in Fuzzy-hysteresis control technique with 7/7 rule and 0.22% in 5/5 rule, Hence It proves the effectiveness of the Combined controller technique and also gives an idea about different fuzzy-rule.
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