JCT - Volume 8 Issue 1 (January 2019)

 


Sr/No/ Title Pdf
1 Flexible Wide Band Bow Tie Shape Patch Antenna for WLAN Application
Leena Rahangdale (M.Tech DC), Sudesh Gupta (Associate Professor)

ABSTRACT - A flexible bow-tie antenna based on a multi metal sheet on top of a very thin flexible substrate is introduced. The antenna is constructed from two right-angle triangles fed by a microstrip waveguide transmission line. A prototype is designed, characterized on computer simulated technology (CST). The tenability is proven by considering the version in free-space. Measurements demonstrate good agreement with simulations. The proposed multi-layer flexible bow tie antenna cover the WLAN (2.4 GHz, 3.65 GHz) and Wi-Max (2.3 GHz, 2.5 GHz, and 3.5 GHz) spectra, with an overall impedance bandwidth of 3.004 GHz (69.76%). The return loss 4 GHz of proposed flexible bow tie antenna is -38.5 dB and the VSWR at this point is 1.23. The radiation of the antenna is bi-directional with maximum gains of 3.02 dB for the free-space.
Keywords— Flexible antennas, Bow-Tie, Microstrip feed line, Return Loss (S-11) and Voltage Standing Wave Ratio. .
Page No. 201 - 206 .

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2 A Review of DC-DC Converter Topologies to Integrate PV for Solar Applications
Sandhya Parashar

ABSTRACT -As per the present scenario lot of power shortages are there in all over the world especially in our country the grid transferring problem is also high so that eco-friendly solutions are becoming more prominent than ever, as a result of the concern regarding the state of our deteriorating planet. This paper presents the design of DC-DC boost converter which uses solar system as input source. In general, solar is one of the renewable energy sources which are sustainable and free if compared to other alternative energy. The voltage of solar system can produce a maximum voltage up to 16V during daylight a simple and economic power conditioner to convert the power available from solar panels into 60 Hz ac voltage is described. The raw dc voltage from the solar panels is converted to a regulated dc voltage using a boost converter and a large capacitor and the dc output is then converted to 60 Hz ac using a bridge inverter. Power for the boost converter can come from any suitable DC sources, such as batteries, solar panels, rectifiers and DC generators. A process that changes one DC voltage to a different DC voltage is called DC to DC conversion. A boost converter is a DC to DC converter with an output voltage greater than the source voltage. A boost converter is sometimes called a step-up converter since it “steps up” the source voltage. Also the of boost converter working in continuous conduction mode (CCM) has been introduce.
Keywords— Solar panels, DC-DC boost converter, solar system, renewable energy, continuous conduction mode (CCM).
Page No. 207 -213 .
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3 Performance Analysis of SVPWM based Single Phase Voltage Source Inverter
Neelesh Dehariya, Sagar Singh Tomar and Naveen Soni

ABSTRACT -The inverter topology which produce single phase AC with conversion of DC is known as single phase inverter. The inverters sometimes operate in a very pulse width modulated (PWM) method and switch between different circuit typologies, which implies that the power converter may be a nonlinear, specifically piece wise smooth system additionally to the present, the control methods utilized in the inverters are just like those in DC-DC converters. This paper discusses the review of the multilevel inverter topology developed by the different researchers.
Keywords— DC/AC, PWM, UPS, MLI, SHEPWM, OHSW etc.
Page No. 214-219 .
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4 Performance Analysis of CC-Multilevel Inverter in PV System
Jyoti Patel, Dr. Anula Khare

ABSTRACT -A lot of research has been carried out to make renewable resources more efficient and easier to use. The use of photovoltaic cells in the last few days has been one of the greatest researches. PV cell generate power in DC form. A DC/AC converter is utilising to convert the DC power into AC power. So the interest of the different power converter is now becomes more popular for conversion. In this paper discuss the different work associated in the field of the power converter which is applicable in the power modulator. Also discuss the basic problems which are facing in the power converter industry.
Keywords— REC, UPS, THD, MLI, DC/AC, PWM, etc.
Page No. 220-226 .
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5 TLBO based ELD of IEEE-30 Bus System
Sumit Kumar Mishra, Abhishek Shrivastava and Dr. Sameena Elyas Mubeen

ABSTRACT - A significant reduction in operational costs as well as the amount of fuel used results in a saving in the operation of the power systems. Modern electricity utilities aim mainly to provide consumers with the lowest possible cost of high-quality, reliable energy supply while working to fulfil the limits or constraints on generation units and environmental considerations. These restrictions formulated the problem of economic load dispatch (ELD) to find the optimal combination of the energy output of all online generating units that minimizes the overall cost of fuel while meeting the limitations of equality and the set of inequalities. This problem of an ELD can effectively be resolved by traditional algorithms, such as lambda iteration, baseline participation factor, gradient method, and Newton's process only if the cost of fuel in generation units is piece by piece linear and monotonous. Here in this paper discuss TLBO based ELD for novel application on IEEE-30 bus system. The result is simulated in MATLAB for validating the result.
Keywords—DG, ELD, Lambda Iteration, Taboo Search, Newton-Rapshon Method, PSO, EHM and TLBO etc.
Page No. 227-233 .
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