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The intermittency of wind speed is very challenging in order to produce wind energy via wind turbine to synchronize with the power system. The accurate wind forecasting models are very important for effective power system management. There are many ways have been introduced for short term accurate wind forecasting. In this paper, Artificial Neural Network (ANN) is used with feed forward back propagation...
Now-a-days, the sales centres are using Digital Weighing Machines (DWM) for precision measurement of weight, acquisition of rate from keypad and computation of cost. The weight, rate and cost are shown on 7-segment bright display devices. The implementation of a DWM can be carried out using various types of hardware topologies and accordingly the cost varies. The FPGA based DWM is the most competitive...
The Electricity Company implements the ‘Prepaid Electrical Energy Meter (PEM)’ scheme among the electricity consumers to meet the objectives of: (i) collecting advance money and (ii) motivating the customers to make conservative use of electricity. The 2nd objective can be effectively achieved with an indoor type PEM fitted with 7-segment bright display unit. The meter designer aims, using appropriate...
At present times, the Electricity Company supplies LCD-type Electrical Energy Meters (LCDEM), and mount them on the outdoor panels. The users cannot time-to-time monitor the consumed energy units to asses that the consumption is exceeding their budget, and they should be aware to shut off the unnecessary loads. A ‘Bright Display Energy Meter (BDEM)’, when fitted indoor, will aware the consumers for...
The 89S52 microcontroller (MCU) is very popular among the students, teachers, amateurs, engineers, scientists, and hobbyists for building electronics projects and consumer products. Successful realization of MCU based products depends on the sound understanding of architecture, instruction and interfacing of the MCU, which can be effectively acquired with the help of a ‘Microcontroller Learning System...
This paper attempts to investigate the ionosphere over Bangladesh for the first time and presents a comparison of the International Reference Ionosphere (IRI-2012) with the peak ionospheric characteristics (foF2-hmF2) and electron density profiles (EDP) measured by radio occultation (RO) missions. In absence of systematic ionosonde measurements over this area, RO measurements provide an opportunity...
The demand of DC equipments are increasing day by day due to rapid development of power electronics devices and green energy. But most of the power generating systems engenders power in the form of AC. Consequently an efficient rectification system is strongly recommended to convert AC into DC. A close study of usual AC to DC conversion system arises a number of problems such as high THD, low power...
This paper proposed a hybrid power generation system suitable for remote area application. This study is based on modeling, simulation and proposed of hybrid renewable energy system in remote area in Rangamati hill-tract district. This model has designed to provide an optimal system configuration based on hour-by-hour data for energy availability and demands. Various renewable or alternative energy...
Modern electronics based on power electronic devices such as Programmable Logic Controllers (PLC), Distributed Control System (DCS) are used frequently in industrials plants to improve efficient production. These systems are extremely sensitive to power quality problem like voltage sag. Voltage sag is considered to be one of the most severe problems that cause failure, overheating and finally a total...
In this paper, flash type A/D converter is combined with integrator type A/D converter and this result a significant increase in conversion speed of integrator type A/D converter. Eight additional comparators are used with integrator type A/D converter to make flash architecture and this makes the integrator type converter 8 times speedy than before. The circuit is simulated in PSIM simulator and...
From the last few decades the world has become more anxious about severe climate change. So the interest on clean energy is increasing tremendously. In Bangladesh power crisis is a regular and acute problem. There are many isolated areas and islands where no electricity have been reached yet. To abate the severe energy problem wind and solar energy has good prospects. Bangladesh is situated between...
In this contribution, we analyze the average symbol error rate (SER) of space-time block coded (STBC) multiple-input multiple-output (MIMO) system over Nakagami-m fading channel with M-PSK constellation in the presence of multiple keyholes. We derived the expression of channel transmission matrix which was further statistically analyzed to find the probability density function (PDF) of instantaneous...
Wireless communication systems always demand higher data rates and better quality of service (QoS). Transmission reliability in a wireless channel with high path loss, time-varying multipath fading and power and bandwidth limitations, is a testing issue. Multiple-input multiple-output (MIMO) systems can reduce the effect of these channel interferences and achieve reliable signal transmission at high...
80286 microprocessors are widely used in their protected modes in the industries for building control circuits. Implementation of the interrupt structure in protected mode is quite different from that of the real mode. The control circuit designers and the academicians prefer to use low-level assembly language programming for the understanding of the interrupt structure and other functional features...
Solar Panel has its wide use starting from a simple 5 W diode lamp to a few kW ac drives. A solar panel with a battery and a charge controller and other auxiliary devices like dc to ac converters constitute a Solar Home System (SHS). The charge controller also known as solar panel voltage regulator, which is used to monitor and regulate the charging of the battery and to initiate alarms and disconnection...
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