Power Quality Improvement In Weak Grids With Three Phase Three Leg Active Power Conditioner
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2014, Vol 2, Issue 8
Abstract
This paper presents a three phase three leg active power conditioner to improve power quality based on renewable energy. A micro-grid is a weak electrical grid, which can be easily subject to disturbances because it includes a variety of intermittent power sources, single-phase, three-phase and nonlinear loads, which can have a dynamic impact on power quality. The unbalance and the harmonic components in current and voltage waveforms are the most important among these. In this paper, the topology and the control strategy of Active Power Conditioner (APC) have been investigated in order to improve the operation of a micro-grid. The APC topology presented in this paper act as an interface between renewable energy sources and the AC bus of a micro-grid. They also use an improved control strategy, which makes possible to inject energy in the micro-grid, compensate the current harmonics and correct the power factor. Moreover, the proposed control strategy allows the line current at the point of common coupling (PCC) to be balanced and sinusoidal even when the load is unbalanced. Consequently, the voltage at the PCC becomes balanced. The simulation results are grouped and presented according to the following power quality indicators: THD (Total Harmonic Distortion), power factor and unbalanced load.
Authors and Affiliations
Putta Praveen Kumar, Savarapu Chandra Shekar
Keywords
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