ABSTRACT:In this paper, the design methodologies are used to obtain the multiple outputs of DC-DC converter with a coupled inductor. The proposed system consists of single input of low voltage level, which can be boost into two different voltage levels. In this topology a coupled inductor with only one power switch is utilized for voltage clamping and soft switching operation. The two output voltages in this topology are obtained by limited components. The output voltages obtained are middle voltage and high voltage terminals are taken as power for a dc load applications. This topology is developed for high efficiency power conversion and two different voltages for dc loads. The proportionalintegral derivative (PID) controller is designed in DC-DC converter to reduce the rise time and steady state error, and is modelled using SIMULINK and simulation results are obtained. It is referred as single input multiple output DC-DC converter. KEYWORDS:Coupled inductor, high-efficiency power conversion, single-input multiple-output (SIMO) converter, soft switching, voltage clamping. I.INTRODUCTIONIn recent years the demand of energy is growing, rising the public awareness for environment. To protect the earth from global warming, created demand for the development of clean energy without pollution, have resulted in much of the research work focused on clean energies, such as fuel cell (FC), photovoltaic, and wind energy, etc., Because of the electric characteristics of clean energy, the generated power is critically affected by the climate or slow the transient responses, and the output voltage by load variations are easily influenced [1]- [3]. To ensure the proper operation of clean energy, other auxiliary components, e.g., storage elements, control boards, etc., are usually required. The fuel cell generation is one of the most efficient solutions for environmental pollution. In general various DC-DC converters with different voltage gains are made to satisfy the requirement of different voltage levels, so that the system control is complicated and corresponding cost is more expensive [4]. Here the conventional SIMO DC-DC converter capable of generating buck, boosts, and inverted outputs simultaneously. However, over three switches for one output were required. This scheme is suitable for only the low output voltage and power application, and its power conversion is degenerated because of hard switching operation.Although a multi-output DC-DC converter shared zero-current-switching (ZCS) lagging leg having soft switching property can reduce the switching losses, but it is a three full-bridge converter scheme of more complicated. By this scheme the high-efficiency power conversion is difficult to achieve, and its cost is more expensive [5]-[6]. This paper presents a newly designed SIMO converter with a coupled inductor and uses one power switch to achieve its objectives of high-efficiency power conversion, high step-up ratio, and different and different voltage levels. In SIMO converter the utilisation of a low-voltage-ra...
By connecting it to the hybrid micro grid system, this explains the combination of wind, solar, and fuel cell power. Renewable energy is frequently used today. Distributed energy sources like wind, solar, fuel cells, etc., can operate concurrently with a larger utility. The majority of people today want to use sustainable energy sources like solar, wind, tidal, geothermal, wave, etc. A tiny grid produces the necessary electricity. In this project, energy storage and utilisation with a micro grid are demonstrated. This project serves as an example of how a micro grid can be used to store and use power. We usually allow the Micro Grid to use us by producing this energy. The system is a composite that utilises renewable resources such fuel cell, a solar array, a wind generator, and an energy storage system (ESS) that uses a battery as one of its renewable energy sources. Power Electronics converters are crucial to the system since they enhance power management and control strategies for various sources. The single-input Fuzzy logic and speed controllers are utilised to track the maximum power point for the wind and PV subsystems, respectively (MPPT). A power management method based on battery state of charge (SOC) was created and put into use to maintain the hybrid system's energy balance. A proportional integrative (PI) controller was used to supply a resistive load with a constant amplitude and frequency in order to regulate the AC output voltage was obtained. The proposed solution is deemed to be very promising for possible applications in hybrid renewable energy management systems based on the received bids. MATLAB/SIMULINK is to be used to develop the simulation.
There is a strong to increase energy security which means having assured across to reliable supplies of energy and the ability to protect and deliver sufficient energy to meet operational needs. The aim of this project is to develop a solar photovoltaic generation system with a battery for micro grid applications. Here, a hybrid solar system is used with lithium-ion battery for input power generation. The proposed system is capable to provide security of supply by providing uninterrupted power to critical loads and transition consistently. We have used hysteresis control technique for the inverter to generate pulses. In the proposed micro grid system, simulation results are presented and analyzed.
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