The real problems in diminution of power quality occurs due to the rapid growth of nonlinear load are leads to sudden decrease of source voltage for a few seconds i.e sag, swell, harmonics in source and load current, voltage unbalance etc. All these problems can be compensated by using Unified Power Quality Controller (UPQC) and the operation of UPQC depends upon the available voltage across capacitor present in dc link. If the capacitor voltage is maintained constant then it gives satisfactory performance. The proposed research is basically on designing of Photo Voltaic (PV) /Wind energy fed to the dc link capacitor of UPQC so as to maintain proper voltage across it and operate the UPQC for power quality analysis. The said model is simulated in Matlab and results are verified by using FFT analysis.The proposed PV/ Wind energy-UPQC is design in Matlab simulation for reduction of voltage sag, swell, interruption of voltage, harmonics in load current and compensation of active and reactive power.
Keyword:Conditioner Harmonics Power quality Solar PV Unified power quality Wind energy
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Corresponding Author:Sarita Samal, Department of Electrical Engineering, Veer Surendra Sai University of Technology, Burla, odisha, India Email: saritaruchy@gmail.com
INTRODUCTIONThe use of electricity is increasing very rapidly so the necessity of renewable energy based source is required for interconnection to the distribution network. The main drawbacks of the renewable sources are the power generation is not continuous and it is season based. To overcome these disadvantages numbers of renewable sources are interconnected [1], [2]. The compensation principle and different control strategies of the UPQC in detail and performance of UPQC is examined by considering, a diode rectifier feeding an RL load (non linear load) that acts as a source of harmonics [3]. The theory, modeling and application of a unified power quality conditioner has been described by [4]. The coordinated and integrated control of solar PV generators with the maximum power point tracking (MPPT) control and battery storage control to provide voltage, frequency (V-f) and P-Q control, respectively, with PV generator and battery storage support to an islanded Microgrid [5]. Femia et al [6] have developed a scheme for maximum power point tracking (MPPT) of solar PV system using perturb and observe method. Gaeid et al [7] have design a unified power quality conditioner (UPQC) including a series and a shunt active power filter (APF) to compensate harmonics in both the distorted supply voltage and nonlinear load current. In the series APF control scheme, a proportional-integral (PI) controller, meanwhile a PI controller and are designed in the shunt APF control scheme to relieve harmonic currents produced by nonlinear loads. Basu et al [8] have made a comparative evaluation of two models of UPQC for suitable interface to enhance power quality. Montero et al [9] have developed number of method...
