Abstract
The unified power quality conditioner is equipment used for regulated voltage distortion and voltage unbalance in a power system. This device gives unique control on the power flow and voltage stability in the transmission line within their limits and enhancing the power to flow through the preferred path. This paper presents a control scheme and Theoretical derivation of the unified power flow conditioner and the simulation results are compared and contrasted in detail. UPFC is a combination of shunt Active and series active power filters. UPFC contains a DC link capacitor in a single phase voltage source inverter with two back to back connected, three-phase three-wire and three-phase four-wire are arranged. The objective of the study is to introduce a scheme which improves the quality of power in the flexible AC transmission systems on the aspects of voltage sag and harmonic distortion apart from enhancing power transfer capability and stability limit using unified power flow conditioner In this, the power system simulation models are made on MATLAB version. The results obtained show that the UPFC controller had better performance to damp LFO compared to the other UPFC damping controllers.
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