Power Electronics For Renewable Energy Utilization

Fig. 9(a) shows the DC-link voltage across the DC-link capacitor of the PV array. The DC-link reference voltage corresponds to maximum power point of the PV array. Fig. 9(b) shows the power demand by the load, and power flows from the grid and PV system generated power. As the PV system generated power could not meet complete power demand of load, remainining power is supplied by the grid. At 1secocond the PV system switched from partially shaded condition to uniform solar insolation. Thus, at this point power supplied by the inverter and grid also varies. Fig. 10(a) shows the grid current which is fully sinusoidal. Fig. 10(b) shows the inverter output current. Fig. 11 shows the performance of system under reactive load condition. In this study, a 500VA reactive load is considered. The figure shows the complete reactive power is supplied by the inverter. Thus the power factor of the system is maintained nearly at

Wind force is still the most encouraging renewable energy in the year of 2013. The wind turbine system (WTS) began with a few tens of kilowatt power in the 1980s. Now, multi megawatt wind turbines are widely installed even up to 6–8 MW. There is a widespread use of wind turbines in the distribution networks and more and more wind power stations, acting as power plants, are connected directly to the transmission networks. As the grid penetration and power level of the wind turbines increase steadily, the wind power starts to have significant impacts to the power grid system. Therefore, more advanced generators, power electronic systems, and control solutions have to be introduced to improve the characteristics of the wind power plant and make it more suitable to be integrated into the power grid. Meanwhile, there are also some emerging technology challenges, which need to be further clarified and investigated. The global electrical energy consumption is still rising and there is a steady demand to increase the power capacity. The production, distribution and the use of the energy should be as technological efficient as possible and incentives to save energy at the end-user should be set up. The deregulation of energy has lowered the investment in larger power plants, which means the need for new electrical power sources may be very high in the near future. Two major technologies will play important roles to solve the future problems.

The quality and dependability of power have become an important factor for the enlargement of new technologies with the imminent derestricted environment. The beginning of power- electronic devices have steered a new era of power quality while integrating them with the renewable sources of energy. Distributed generation (DG) systems are projected to play a vital role to meet the energy demand with non-polluted environment. Distributed generation technologies such as wind turbine, photovoltaic systems, fuel cell and diesel engines are used in various places. Of all these diesel engines have fast response time and controllability, they are relatively common for combination with WECS (wind energy conversion systems).

Energy is the convertible currency of technology. Without energy the whole fabric of society as we know it would crumble; the effect of a 24 hour cut in electricity supplies to a city shows how totally dependent we are on that particularly useful form of energy. Computers and lifts cease to function, hospitals sink to a care and maintenance level and the lights go out. As populations grow, many faster than the average 2%, the need for more and more energy is exacerbated. Enhanced lifestyle and energy demand rise together and the wealthy industrialized economies which contain 25% of the world 's population consume 75% of the world 's energy supply [1]. The use of new efficient photovoltaic solar cells (PVSCs) has emerged as an alternative measure of renewable green power, energy conservation and demand-side management [2]. Renewable energy is the only hope and it is the area of latest research which needs a revolution to make an effective solar panel charging system for the regulation of the flow of current to the desired output and saving the battery from receiving extra voltage and increasing the life. 2. Modelling of PV Cell PV generators are neither constant voltage sources nor current sources but can be approximated as current generators with dependant voltage sources [3]. During darkness, the solar cell is not an active device. It produces neither a current nor a voltage. However, if it is connected to an external supply (large

In a typical microgrid, small-scale generators such as wind, photovoltaic (PV), fuel cells, and small-scale gas turbines are installed proximity to the load side, and inverters are used as interface devices. Inverters play an important role in

Nowadays, renewable energy resources play an important role in replacing conventional fossil fuel energy resources. Photovoltaic energy is one of the very promising renewable energy resources which grew rapidly in the past few years. Photovoltaics has one major problem and which is that with the variation of the operating conditions of the array, the voltage at which maximum power can be obtained from it also changes. In the thesis, a PV model is used to simulate actual PV arrays behavior, and then a Maximum Power Point tracking method and wind energy system using Feed Forward Neural networks is proposed in order to control the power. Further more,the proposed feed forward neural network technique using hybrid system is compared with the ANFIS(adaptive neuro fuzzy interference system). Simulation results shows that the proposed feed forward neural network maximum power point tracking method gives faster response than the ANFIS

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.

People of the world are in need to find and develop new sources of energy to power their lives. Owing to the increasing demand for electrical energy, world’s fossil fuel supply will thus be depleted in a few decades. Hence, alternative or renewable sources of energy have to be developed to meet the future energy requirement. Grid connected wind capacity is undergoing through fastest rate of growth compared to any other form of renewable power generation, achieving global annual growth rates of 20–30 %. The power electronic converters play a major role in wind energy conversion system for controlling and conditioning of output power from wind energy. During last few years matrix converters and multi level converter topologies have generated significant interest. This paper discusses the diode clamped multilevel matrix converter design for double fed induction generator based wind energy conversion system. The MATLAB/SIMULINK software is used for analyzing the converter performance.

The development of power electronics devices such as Flexible AC Transmission System (FACTS) and customs power devices have introduced and emerging

In this study, a multi-input High Step-up Boost converter (MIHSBC) is proposed, which can not only deal with PV power and wind turbine energy simultaneously/individually but also with deal with Diesel generator and in addition, recycles the leakage-inductance energy and steps up the input voltage. As compared with the above-mentioned (Figure 2.) isolated double-input converter, the proposed one has a much simpler structure.

In the present era of advanced technologies, power electronics devices have wide applications. These devices are important for industrial and domestic uses but they generate the power quality problems [1-2].these problems are created on account of these devices

THIS IS TO CERTIFY THAT THE PROJECT ENTITLED WITH “SOLAR TRACKING SYSTEM AND HYBRID POWER GENERATION” HAS BEEN COMPLETED BY ANKUR BUSA, ABHISHEK SINGH, MUGDHA JAIN AND MEGHA PATEL OF UNDER MY GUIDANCE IN FULFILMENT OF SEMESTER-VII OF BACHELOR OF ENGINEERING IN ELECTRONICS AND TELECOMMUNICATION ENGINEERING DEPARTMENT DURING THE ACADEMIC YEAR 2016-2017.

The objective of the study is to develop a realizable inverter design that would be reliable, cost effective, efficient, and maintainable. The inverter is to be powered from a 12Vdc/40Ah battery source and it is to generate a 220VAC/50Hz with a power rating 500VA. Other objectives of the study include:

aInstitut Voltan dan Arus Tinggi (IVAT) and Faculty of Electrical Engineering, Universiti Tenologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia

India is the seventh largest nation with an area of 3.287 million km2. Moreover, it is a relatively rich and rapidly developing country; for this reason demand for electricity is growing on significantly average at around 5% annually. In addition, one of the most fascinating aspects of solar cells is their ability to convert the most abundant and free forms of energy into electricity without moving parts or components. Also, they do not produce any adverse forms of pollution that affect the ecosystem. India’s rooftop solar capacity addition grew 66 percent from last year to reach 525 mega watts. The state power grid system has supplied electricity to approximately 80% of the population living in the state capitals and industrial centres. Based on recent studies, PV technology and application is economically viable to be adopted in tropical countries like India where it receives more than 7 hours of direct sunlight each day throughout the year. Hence, India now tends to move on the new trend of solar energy. To measure the data continuously was not an easy task for earlier technology because of lack in advancement of software technology. So, we have used LabVIEW software for continuous measurement. It provides all the facilities in one place. The LabVIEW software is a national instrumentsTM product that is used to monitor the data for real time applications. Laboratory Virtual instrumentation for