Abstract
The main objective of this paper is to develop PI and Fuzzy logic controllers to analyse the performance of instantaneous real active and reactive power (p-q) control strategy for extracting reference currents of shunt active filters under balanced, un-balanced and balanced non-sinusoidal conditions. When the supply voltages are balanced and sinusoidal, then all controllers converge to the same compensation characteristics. However, when the supply voltages are distorted and/or un-balanced sinusoidal, these control strategies result in different degrees of compensation in harmonics. The p-q control strategy with PI controller is unable to yield an adequate solution when source voltages are not ideal. Extensive simulations were carried out; simulations were performed with balance, unbalanced and non sinusoidal conditions. Simulation results validate the dynamic behaviour of Fuzzy logic controller over PI controller. The 3-ph 4-wire SHAF system is also implemented on a Real Time Digital Simulator (RTDS Hardware) to further verify its effectiveness. The detailed simulation and RTDS Hardware results are included.
Highlights
Instantaneous active and reactive theory (p-q theory) was introduced by H
The main objective of this paper is to develop PI and Fuzzy logic controllers to analyse the performance of instantaneous real active and reactive power (p-q) control strategy for extracting reference currents of shunt active filters under balanced, un-balanced and balanced non-sinusoidal conditions
The 3-ph 4-wire Shunt Active Filter (SHAF) system is implemented on a Real Time Digital Simulator (RTDS Hardware) to further verify its effectiveness
Summary
Instantaneous active and reactive theory (p-q theory) was introduced by H. No restrictions are imposed on the voltage and current waveforms, and it can be applied to three phase systems with or without neutral wire for three phase generic voltage and current waveforms. It is valid in the steady state and in the transient state. Fuzzy logic controllers [8] have generated a great deal of interest in various applications and have been introduced in the power-electronics. We developed a filter with instantaneous active and reactive power (p-q) method which is prominent one with this we analysed the performance of filter under different main voltages. Extensive simulations were performed and the detailed simulation and RTDS Hardware results are included
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