Reactive Power Compensation Strategy For

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

Multilevel inverters have ability to generate low switching frequency high quality output waveforms with several high voltages and higher power applications and the general structure of multilevel converter is synthesizes a sinusoidal voltage from several level of voltages. The multilevel inverter has overcome the limitations of conventional two level voltage converters. The advantages of multilevel inverter are higher power quality, lower switching losses, low electromagnetic interference and higher voltage capability.

Since there is no electrical energy storage in direct-coupled systems, the load only operates during sunlight hours, making these designs suitable for common applications such as ventilation fans, water pumps, and small circulation pumps for solar thermal water heating systems. Matching the impedance of the electrical load to the maximum power output of the PV array is a critical part of designing well-performing direct-coupled system.

The climatic condition in India provides abundant potential of solar power due to large scale radiation available during a wider part of the year due to tropical condition in the country. The solar power can be developed for long term use through the application of solar photo- voltaic (SPV) Technology which

A background and description of new solar power generation components are needed to explain how solar energy is more economical, efficient, and cleaner (non-carbon) than most other forms of energy. There are two types of technology for converting solar energy into electricity — photovoltaics (PV) and concentrated solar power (CSP), sometimes called solar thermal that condense or magnify sunlight. The most widely deployed solar electric technology in the world is photovoltaics (PV), another name for solar cells, that basically collect sunlight to create a direct current (DC) electric field. An inverter box converts this DC to

As solar power take an more and more important roll in today’s world, we need to know this clear resource and understand how to use it. In this paper, we will discuss about solar energy, it’s application in real life, solar panel, two kinds of solar farm, PV cell and converter.

Summary: At present, most distributed renewable energy systems produce direct current (DC) electricity which is then inverted to alternating current (AC) and fed into the electric grid. Simultaneously, many modern building loads and storage systems use rectifiers to convert AC grid electricity to DC for use at the load or battery. Onsite use of renewable energy production therefore requires two energy conversions: DC/AC at the point of generation and AC/DC at the load. The Bosch DC Building Scale Microgrid Platform (DCBMP) offers significant benefits relative to conventional AC grid systems by distributing as much solar power as possible to DC loads/storage, and then inverting only the excess power to AC for AC loads and export to the grid. The DCBMP maximizes the utilization of solar energy on-site, smooths the volatility of the PV output, increases the load and storage efficiencies and minimizes dependence on grid-based electricity. The proposal incorporates long-life (20-25 years), commercially ready technology, increasing energy efficiency and improving energy security. These features are provided at a low up-front investment when compared to conventional AC-based systems, enabling a levelized cost of electricity (LCOE) less than $0.14/kWh by 2020 for behind-the-meter PV and storage systems and a lower total cost of ownership for the DC loads and DC resources as compared to other approaches, while providing export power to the utility grid through smart inverter

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

The flexible AC transmission system (FACTS) concepts, based on applying state-of-the-art power electronic technology to existing AC transmission system, improve stability to achieve power transmission close to its thermal limit [4]. Such devices are installed by utilities and by many private entities in India. In order to achieve this identical goal other way is by converting existing 400kV / 765 kV double circuit HVAC line to HVDC line without any modifications in the existing tower structure, insulators and conductors considering heavy pollution as the worst case.

Abstract—This paper covers the need and use of power electronics in the application of renewable energy utilization. Covered in this paper is wind energy with variable speed drives and their controlling power electronics. Solar energy, specifically photovoltaics and their controlling power electronics. High-voltage direct current transmission lines and the power electronics that allow for this technology to exist.

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

The proposing team has worked on several renewable energy projects. The latest one is the highly competitive Google “Little Box Challenge” design competition, hosted by Google Company and IEEE Power Electronics Society [22], from Sept. 2014 to March 2016. Google offered one million dollar grand prize. Ximax team successfully entered the finalist and become one of the five best solar inverter design teams in the US and one of the best eighteen in the world. Although we did not win the final prize, we did prove that we are a world class design team. It gives high confidence that Ximax will succeed in this proposed project.

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

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

Abstract: The current energy situation with fossil fuels as the main source of the world’s energy has two main flaws: fossil fuels contribute to global warming via the greenhouse effect and they are limited in the quantity that remains. Solar power solves both of these problems and can be captured by utilizing photovoltaic cells. However, photovoltaic cells have their own drawbacks due to their high costs of installation and maintenance.