In recent days, emphasis is laid on improving the efficiency and applicability of the inverters that are currently used in photovoltaic systems so that a pure sinusoidal waveform is obtained which can be directly used for a number of applications. This paper presents the design and development of a Quasi Impedance Source Inverter (QZSI) whose apex application is with the Photo voltaic power con...

Meenakumari.S Department of Electrical and Electronics Engineering,Er.Perumal Manimekalai College of Engineering, Hosur, India Abstract— In this project, a near-unity-power-factor front-end rectifier employing two current control methods, namely, average current control and hysteresis current control, is considered. This rectifier is interfaced with a fixed-pitch wind turbine driving a permanen...

Due to its simplicity, the discontinuous conduction mode boost rectifier is potentially the least expensive active line-harmonics reducing circuit. Problem statement: The line current however, shows considerable distortion when the peak input voltage is close to the output voltage, As a result, the input power factor is poor. This study proposes a simple, low-cost method to reduce the line harm...

This paper presents a novel ultra-low power maximum power point tracking (MPPT) technique with a wide tracking range. An indirect, non-interrupting and approach using a novel timing-based tracking algorithm is proposed. This reduces processing current consumption down to 3.4-μA. Moreover, the proposed tracking method is self-adaptive to various types of photo-voltaic cells and thermo-electric g...

The hybrid AC-DC microgrid (HMG) architecture has the merits of both DC and AC coupled structures. Microgrids are subject to intermittence when the renewable sources are used. In the HMG, since power fluctuations occur on both subgrids due to varying load and unpredictable power generation from renewable sources, proper voltage and frequency regulation is the critical issue. This article propos...

Fuzzy logic based voltage controller is proposed for hybrid generation scheme using solar and wind energy for isolated applications. The fuzzy logic controller is designed to vary the duty-cycle of the DC-DC converter automatically such that to maintain the load voltage constant. The hybrid scheme comprises one set of fixed capacitor bank and a parallel connected three-phase fixed frequency pul...

The utilization of a cuk converter for control of photovoltaic power using Maximum Power Point Tracking (MPPT) control mechanism is presented in this paper. The main aim of the project is to use cuk converter along with a Maximum Power Point Tracking control mechanism. The MPPT is responsible for extracting the maximum possible power from the photovoltaic panel and feeding it to the load via th...

Most of the power electronic equipments are operated with dc supply. For reliable and stable operation, dc supply should be regulated. The regulation can be performed using buck, boost, Cûk, Sepic, Flyback regulators. Except single phase rectifier with resistive load all other rectifiers input currents are non sinusoidal in nature. This front end current distortion of rectifier converter leads ...

-In this paper, comparative evaluation of different techniques for harmonic reduction in input current of ac-dc converter is presented. Converters employing ac side switching, resonant converter, active clamped boost converter are simulated in PSIM and their performance under varying load condition with load voltage regulation is evaluated. The results revealed that active clamped boost convert...

The maximum power point tracking (MPPT) system controls the voltage and the current output of the PV system to deliver maximum power to the load. Present work deals a comparative analysis of incremental conductance, and neural network based MPPT techniques. Parameters values were extracted using Newton Raphson method from characteristics of Shell SP75 module. The simulations have been carried o...