Electric power converters For various purposes electric power or electric energy is converted from

5V DC power should be supplied to PIC microcontroller which will be achieved by converting 230V AC into 5V DC. 230V AC is too high to be reduce. Therefore, stepdown transformer will be needed. Step down transformer will reduce the line voltage to certain voltage that will help us to convert 230V AC to 5V DC. In order

It is observed that the power factor is maintained closer to unity when the input voltage is reduced from 230V to 110Vrms. Figure 11 (a) and (b) shows the power factor correction of controller for various load condition such as 20% (60W) and 75% (230W). The power factor for the system is found to be 0.84 for light load condition and 0.99 for full load condition. The THD of input current at full load with predominant third and fifth harmonic components are shown in Figure 12(a) and (b).Third harmonics is found to be 4.8% and fifth harmonic component is 4.9% which are well within IEC 61000-3-2 standard during wide range of load variations. The variation in power factor with load is shown graphically in Figure 13(a). It can be inferred from the graph that improved resettable control operates at high power factor for all load condition whereas the conventional PI control has poor power factor under light load conditions. Figure 13(b) shows the comparison between the efficiency of the converter for varying load conditions with the conventional control method and the resettable integrator control. The converter’s efficiency is maintained at 92% for light load conditions and 96% for fully loaded condition with integrator control technique. Thus the improved resettable integrator controller provides a very simple and reliable solution for power factor correction and

electricity as the "fuel" instead of gasoline or some other combustible fuel. The electric motor in

 The basic objective of this paper is to extract maximum power and to maintain power quality to a satisfactory level from the varying condition the Photovoltaic array with different solar irradiation.

In recent years, Energy comes from natural resources such as sunlight, wind, rain, tides and geothermal heat. These resources are renewable. Therefore, for all practical purposes, these resources can be considered to be unlimited, unlike dwindling conventional fossil fuels. The renewable energy sources are known to be much cleaner and produce energy without the harmful effects of pollution unlike their conventional counterparts. Solar energy is converted into electrical energy and the electrical power generation in PV systems is highly affected by the temperature and the insolation level which makes it impractical to directly connect them to the load without any storage devices or utility grid interface. The PV systems focused on the minimization of the installation costs and the maximization of the energy capture and conversion efficiency. In order to maximize the conversion efficiency, the PV system should be operated at its maximum power point (MPP). This power is supplied to the load using parallel power processing topology to reduce the amount of power processed through the converter and, hence, decrease the converter size and increase the efficiency by means of direct energy transfer (DET).The concept of the PPP topology is shown in Figure.

Power plants everywhere generate electricity by converting mechanical power such as the rotation of a turbine into electrical power. In a coal-fired steam station, the combustion of coal turns water into steam and the steam in turn drives turbine generators to produce electricity. Power plants today rely either on fossil fuels, nuclear fission, or renewable sources like hydro.

The cost of installation of solar converters is one of the major issues for the society. Due to high costs of installation, lots of people don’t even consider have a solar source installed. However, people don’t usually go into deep analysis, but if you do get into it, you can notice that, yes, it is expensive to install, but the electric bills will immediately drop, making this innovation totally worth the investment.

This method has three major 47 disadvantages: Firstly tracking local peaks of the solar array voltage-power curve, secondly 48 oscillations around the MPP and thirdly low speed[1,6,11,13-14]. The DC-DC converter deliver the 49 maximum power from PV module to load by adjusting the duty cycle and able to distribute a maximum 50 power when load is changes [1,6,11,13-15]. The proposed method is a maximum power coefficient 51 UNDER PEER REVIEW

Renewable energy resources especially solar energy are growing rapidly in view of huge energy consumption and environmental concerns.Large scale photovoltaic systems are connected to medium voltage distribution grids in which power converters are required to convert DC solar energy to

Now a day, photovoltaic (PV) energy system has attracted interest as a next generation energy source capable of solving the couple of problems caused by increasing energy consumption. Photovoltaic system avoids unnecessary fuel expenses, pollution or waste and no vibrations/ noises because the components of power

The choice of right type of converters for the different requirement in specific application has great influence on the optimum performance of the photovoltaic system. In last two decades, enormous developments have been taken place in the area of solar PV power generation. A large number of research publications in these areas have led to this persuasion of a critical review of the available literature. In particular, many inverter topologies have been introduced to incorporate several unique features, such as a) intrinsic boost capabilities, b) isolation, c) high efficiency, d) good power decoupling, e) dual grounding function, f) single stage solar power conversion capabilities, g) compact design and h) good power quality, for both

This report aims to discuss the working of DC-AC converter for photovoltaic systems and how it has been implemented to convert renewable energy into usable power to be supplied to the load (power supply application).A topology of a two-stage DC-AC converter has been designed in which a boost converter and a full bridge inverter act as an interface between the photovoltaic (PV) array and the power supply applications. A controlled strategy called Maximum Power Point Tracking (MPPT) technique has been used for achieving maximum power output at the load. Various modes of operation of the converter and the inverter are also discussed. MATLAB Simulink environment has been used for designing the circuitry and to observe various waveforms related to the output.

Analysis of Boost converter and Interleaved Converter for Permanent Magnet Synchronous Motor of Hybrid Electrical Vehicle

Keywords: — Mathematical model of photovoltaic cell; photovoltaic module; array; boost converter; mppt algorithm; pwm; single phase inverter; three phase inverter; MATLAB/simulink; gate pulse using 555 timer; voltage doubler circuit in hardware.

Abstract- A MPPT is a major roll of pv module. Now a days various types of MPPT technique is used in pv module.But new MPPT technique is presented in this paper.A new technique which exploits the resistance characterstics of the pv cells .An analysis of i-v characterstics of the pv module in the i-v plane.The maximum possible rectangle has been determine by i-v chractersis of the pv module and variying the series resistance of the pv module. The result obtain through powersimulation software by using 60watts pv module.