http://dspace.ewubd.edu:8080/handle/123456789/3178 2026-04-06T21:25:13Z http://dspace.ewubd.edu:8080/handle/123456789/3552 Numerical Analysis of On-Grid Photovoltaic System and O-Grid Wind-Turbine Asynchronous Generator Using Simulink Ahmmed, Md. Tanveer; Patoary, Md. Nazrul Islam This work focuses on a program developed in stimulant of 100-kw and turbine asynchronous generator .This program simulates PV ar- ray using an equivalent circuit model including a photocurrent source, a diode, a series resistor and a shunt resistor .The PV module is the interface which converts light into electricity. Modeling this device always requires taking climate factors (irradiance and temperature) as input variables. The output can be current, voltage, energy or other variables.The common ve-parameter model was selected for the present study, and solved using a novel combination technique which integrated an algebraic simultaneous calculation of the param- eters at well known test prerequisites (STC) with an analytical dedi- cation of the parameters under real running conditions. A monocrys- talline photo voltaic module was simulated using MATLAB/Simulink software program at di erent ambient temperature and the output energy of cell was recorded. Solar Radiation and its e ect on energy of module is also simulated. Simulation shows that the output en- ergy of photo voltaic cell get decreased with reduce in sun's radiation and raising temperature also decreases the output.Additionally, this thesis also examines the operating characteristics of an o - grid wind turbine asynchronous generator . Wind energy capacity has grown rapidly as a share of worldwide electricity supply in recent years. In an isolated distribution network, a small-scale wind turbine generator is usually installed. This paper is intended to justify the fact that the intermittent power output of a small wind power capacity contributes to demand without interfering with the output power balance i This thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electronics and Telecommunication Engineering of East West University, Dhaka, Bangladesh 2019-12-18T00:00:00Z http://dspace.ewubd.edu:8080/handle/123456789/3391 Numerical Analysis of On-Grid Photovoltaic System and Off-Grid Wind-Turbine Asynchronous Generator Using Simulink Ahmmed, Md. Tanveer; Patoary, Md. Nazrul Islam This work focuses on a program developed in stimulant of 100-kw and turbine asynchronous generator .This program simulates PV array using an equivalent circuit model including a photocurrent source, a diode, a series resistor and a shunt resistor .The PV module is the interface which converts light into electricity. Modeling this device always requires taking climate factors (irradiance and temperature) as input variables. The output can be current, voltage, energy or other variables.The common five-parameter model was selected for the present study, and solved using a novel combination technique which integrated an algebraic simultaneous calculation of the parameters at well known test prerequisites (STC) with an analytical dedication of the parameters under real running conditions. A monocrystalline photo voltaic module was simulated using MATLAB/Simulink software program at different ambient temperature and the output energy of cell was recorded. Solar Radiation and its effect on energy of module is also simulated. Simulation shows that the output energy of photo voltaic cell get decreased with reduce in sun’s radiation and raising temperature also decreases the output.Additionally, this thesis also examines the operating characteristics of an off- grid wind turbine asynchronous generator . Wind energy capacity has grown rapidly as a share of worldwide electricity supply in recent years. In an isolated distribution network, a small-scale wind turbine generator is usually installed. This paper is intended to justify the fact that the intermittent power output of a small wind power capacity contributes to demand without interfering with the output power balance This thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electronics and Telecommunication Engineering of East West University, Dhaka, Bangladesh 2019-12-18T00:00:00Z http://dspace.ewubd.edu:8080/handle/123456789/3353 Design and Optimization of Multi Slot Microstrip Patch Antenna for Wireless Applications Hasan, Md. Mahady; Hasan, Mahmodul; Bithe, Ruckhbana Islam The objective of this thesis is to design and optimize the performance of microstrip antenna to efficiently operate at 4.1GHz and 3.5GHz frequencies for wireless applications. In this work, rectangular microstrip patch antennas are designed without slots and with multiple slots with the goal to achieve desired results. This paper presents the designs of compact size, cost-efficient, narrow band microstrip antennas using FR-4 substrate with dimensions calculated based on the resonant frequencies. Three different antennas are designed for each of the resonant frequencies. Several attempts are made to optimize the dimensions of the antenna parameters to improve the minimum return loss achieved, bandwidth, radiation pattern, directivity and gain; which are simulated using CST Microwave Studio simulation software. The proposed antenna for 4.1GHz resonated at a return loss of -21.8dB, giving a bandwidth of 177.3MHz which is 4.324% at -10dB, VSWR of 1.177, 5.946dBi directivity and 2.98dB gain. For 3.5GHz the proposed antenna achieved a minimum return loss of - 49.42dB, bandwidth obtained about 151.7MHz which is 4.33% at -10dB, VSWR of 1.006, 5.95dBi directivity and 3.13dB gain. This thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electronics and Telecommunication Engineering of East West University, Dhaka, Bangladesh 2019-08-25T00:00:00Z http://dspace.ewubd.edu:8080/handle/123456789/3352 Comparison of Backpropagation and Hopfield Model in De-noising of Speech Signal Ferdous, Md. Robayet; Akter, Mokarromah; Islam, Nowsadul In this project work, we have used two algorithms of Neural Network (NN): Backpropagation and Hopfield NN to de-noise speech signal. The backpropagation algorithm is found suitable to remove random noise but very poor in the removal of awgn (Additive White Gaussian Noise). The Hopfield NN shows completely reverse performance i.e. suitable for awgn but very poor for random noise. The performance of both algorithms is measured graphically with an original recovered signal, MSE, the convergence of regression and error histogram. This thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electronics and Telecommunication Engineering of East West University, Dhaka, Bangladesh 2019-09-08T00:00:00Z