Home automation system is gainif a significant research attention in recent years. It helps us in leading a comfortable life and quality of lifestyle is gradually uplifted. The different methodologies used in this system have been discussed. In modern days, a smartphone having an android application is used to supervise and control the appliances present in the home automation system. In this paper different types of communication methodologies such as GSM, IoT, Wi-Fi, and bluetooth are reviewed. The pros and cons of these techniques along with their features have been presented. Based on this paper the user can choose the best suitable methodology depending upon their personal needs and specifications for implementing an efficient automation system.

Comparative Analysis of PWM Controlling Techniques of Single Phase Z-Source Inverter

In recent years, conventional energy sources are depleting and getting exhausted. In replacement of this, solar Photovoltaic (PV) systems are used because of its free availability, renewabiiity and less operating cost. But the constraints such as low efficiency, dependability on weather conditions are overcome by using maximum power point tracking(MPPT) algorithms and efficient converters to produce the maximum power output. MATLAB/Simuiink is used to model and analyze PV array, MPPT algorithms, and converters. In this paper, recent research developments in PV array, various MPPT techniques, many efficient Converters are presented. This paper will give an overall idea about the present research trends in the field of Solar Photovoltaic systems.

This paper presents the low-cost power converter learning kit for power electronics lab in the undergraduate electrical engineering course. This paper also examines the learning outcome of an Arduino Nano and MOSFET based converter learning kit. With help of this converter kit, the student can learn the working and control of all types of basic power converter circuits which is present in their electrical engineering undergraduate curriculum. This is a plug and play kind of learning kit with minimum connection changes required to convert from one type of power converter to other types of power converter circuit. This learning kit facilitates to learn and control all type of basic power converter circuits like the chopper, inverter, AC voltage controller, and rectifier. It supports the single phase as well as the three-phase power conversion and control. The total cost of the basic converter kit is less than Rs.1400 i.e., which is less than $20. The effective usefulness and ease in use of the kit are evaluated by the feedback from the third year students of electrical engineering course. The collective feedback result shows the low-cost converter kit is much helpful to understand the basic concepts of the power converter circuit.

This paper presents the performance analysis of various solar photovoltaic (SPV) cell models by comparing the voltage, current and power output under normal and partially shaded conditions. The SPV panel consists of solar cells arranged in series-parallel to get the required output. The SPV panel output will be voltage, current and power. This output is completely depends on the solar irradiation and temperature. This paper compares the output of Ideal and general models of the PV cell under normal and partially shaded conditions. The simulation is carried out with the help of the Matlab/Simulink software and the performance of the various models of the PV cell is compared against the output voltage, current and power in terms of P-V and I-V curves under normal and partial shaded conditions.