Abstract
Increasing power demand in present situation has to comply with the power generation. Generated power has to meet the quality standards. With the introduction of nonlinear loads like static power converters inject harmonics into the system which effect operation of the system adversely. In order to improve the performance of the system these harmonics are to be mitigated and reactive power need to be compensated. In the proposed work a Shunt Active Power Filter (SAPF) is designed to compensate reactive power and the behavior of the system is analyzed by introducing reverse harmonic current.
Highlights
Advent of power electronic technology has given scope for development of non linear loads such as diode-rectifiers, thyristor converters, adjustable speed drives, furnaces, computer power supplies, un-interruptible power supplies, etc. which are economical, flexible and energy efficient but effect the power quality by producing voltage harmonics from current harmonics and consume extra reactive power.[1]
Shunt Active Power Filter MATLAB model is simulated by connecting non linear load from starting and the unbalanced load at T=0.1 seconds with a sampling time of Ts=5e-6seconds without connecting filter and the performance of the system is analyzed by the output waveforms and the Total Harmonic Distortion (THD) of the signals are calculated
Shunt Active Power Filter is connected to the model with a Transition time of T=0.01 seconds and the model is simulated again, it was observed that at T=0.01 seconds the filter got turned on and the process of mitigating current harmonic has started and the performance of the system started to improve
Summary
Advent of power electronic technology has given scope for development of non linear loads such as diode-rectifiers, thyristor converters, adjustable speed drives, furnaces, computer power supplies, un-interruptible power supplies, etc. which are economical, flexible and energy efficient but effect the power quality by producing voltage harmonics from current harmonics and consume extra reactive power.[1]. Improvements in power electronics technology has made engineers to use active filters practically. Passive LC filters are put to use to mitigate line current harmonics and for power factor improvement. There are so many drawbacks of passive filters such as they are bulky in size, compensation is fixed, and causing resonance. To overcome the drawbacks of passive filters, active power filters were designed. [3] Modern active filters are better in terms of their behavior, small size, and their flexibility in application than traditional passive filters. The active filters are available at lower cost with low operating loss, than passive filters.
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