Design and development of intelligent controller for active power conditioner

Abstract

The widespread use of power electronic circuits in electrical networks newlinehas resulted in distorted current waveforms. This causes non-sinusoidal newlinevoltage drop across the transmission line impedances and transformers, which newlineproduces a non-sinusoidal input voltage at Point of Common Coupling (PCC). newlineUnbalanced three-phase line currents are caused by an asymmetric load newlinedistribution. In electric distribution systems, harmonics are primarily caused newlineby nonlinear loads. The harmonic components of the signal have been newlinetheoretically and experimentally analyzed. It is observed that the fifth and newlineseventh order harmonic current components dominate the frequency spectrum. newlineSeveral harmonic mitigation approaches have been proposed to reduce newlineharmonics, such as transformer connection, Passive Power Filter (PPF), Active newlinePower Filter (APF), and Hybrid Power Filters (HPF). It is essential to newlinecompensate harmonic components at the PCC in order to eliminate resonance, newlineheating, and equipment malfunctions. Harmonics are compensated by a tuned newlinePPF. The Shunt Active Power Filter is among the most widely used active newlinepower filter. This kind of filter restores line current to its sinusoidal state by newlinegenerating opposite harmonics. newline