iosr-JEEE   Volume-2 ~ Issue-1

Abstract: The power quality is being affected by the railway traction load. Its effects on power quality cannot be ignored. Hence, a study was done in two traction sub-stations. In this, two railway traction sub-stations were taken for case study. One is Salem 110KV Railway traction where 2400 KVAR rated capacitor bank alone is installed and another is Bommidi 110 KV Railway traction where IGBT based Dynamic Reactive Power Compensation (DRPC) with 1800 KVAR is connected along with fixed 2400KVAR capacitor bank. Both these traction points are nearby and are in the same railway divisions. By installing power quality monitoring system in the sub-station supplying traction load directly, the actual operation data of this traction power supply is obtained. The harmonics due to load currents are measured and compared in both the sub-stations based on IEEE Standards 519-1992.
Keywords: DRPC, Harmonics, Power Quality, Traction Load characteristics, Traction Station

[1] National Development Reform Commission Long Term Integrated Network Development Plan (Z) 2007.
[2] Li Qunzhan. On Some Technical Key Problems in the Development of Traction Power Supply System for high speed railway in China (J) Journal of the China Railway Society, 2010, 32(4): 119-124.
[3] Liu Yu-Quan "Research for the effects of high speed electrified Railway Traction Load on Power Quality – IEEE – 2012
[4] IEEE Standards 519-1992.
[5] ZHANG Xiaoyu, WU Junyong, "Research on Voltage Class of Power System to be connected with Electrified Railways (J) Power System Technology, 2007, 31(1): 12-17.

Abstract : The present work describes the detailed study of the active filters and its characteristics by interfacing the programmable instruments with personal computer(PC) using LabVIEW. The programmable instruments used in the present work are function generator from Protek and HP digital multimeter. Two serial ports are used to establish the communication between function generator, digital multimeter and PCthrough the virtual instrument (VI) developed using LabVIEW software tool. Programmable function generator produces the continuous frequencies to one of the filter circuit using LabVIEW program through one serial communication port and the corresponding output voltage of the filters along with the input frequency is stored in a file by reading the output AC voltage from the digital multimeter through another serial communication port using LabVIEW programming. The workprovides the efficient study of first and second order Active filters with high precession.
Keywords: Digital Multimeter, LabVIEW, PC, Programmable Function Generator, Virtual Instrument.

[1] H S Kalsi, Electronic Instrumentation (Tata McGraw-Hill Publishing Company Limited, 2005).
[2] Digital Synthesized Function Generator/Counter (Protek 9300 series) User Manual.
[3] Digital Multimeter (Hewlett Packard 34401A ) User Manual.
[4] S.V.Subrahmanyam, Linear And Digital IC's Applications (HI-TECH Publishers)
[5] Jeffrey Travis & Jim Kring, LabVIEW For Everyone (Pearson Education, Prentice Hall, 2007)
[6] Cory L. Clark, LabVIEW Digital Signal Processing (Tata McGraw-Hill Publishing Company Limited, 2005).
[7] M. Ashok Kumar, B. Rama Murthy, Ch.V.V. Ramana, Willem Clarke and K. VenuMadhav, Capacitance Measurement with Integrated Instruments, 2011 International Conference on Recent Advancements in Electrical, Electronics and Control Engineering, 978-1-4577-2149-6/11/$26.00 © 2011 IEEE.
[8] C. Chandra Mouli, P. Jyothi, K. Nagabhushan Raju, C. Nagaraja, T. Bheema Lingaiah and M. Ashok Kumar,Implementation of serial communication in LabVIEW to interface with 8051 based microcontroller, Research Journal of Engineering & Technology, Vol.3. Issue.4, pp.7-9, ISSN 0974-2824.
[9] Muhammad Ali Mazidi, Janice Gillespie Mazidi and Rolin D. McKinlay , The 8051 Microcontroller and Embedded Systems using Assembly and C,(2ndEditionPHI).
[10] C. Nagaraja, C. Chandra Mouli, S. Athavulla, and T. Bheemalingaiah, "A Microcontroller Based Programmable Power Supply." Lab Experiments – A Journal of Laboratory Experiments, vol. 10, No - 4, pp.249-253, December 2010.
[11] C. Chandra Mouli, V. Ramnath, D. Sailaja, and K. Nagabhushan Raju, "Embedded System Based ExhaustFan Control."LabExperiments – A Journal of Laboratory Experiments, vol. 11, No - 3, pp.200-201, September 2011.

Abstract: In this paper a simplified approach of Magenn Air Rotor System (MARS) power which is one of the recently found energy source. MARS is a lighter wind turbine that rotates about a horizontal axis in response to wind, generating electrical energy. This electrical energy is transferred down for immediate use, or to a set of batteries for later use, or to the power grid .Helium (an inert non-reactive lighter than air) sustains the Air Rotor which ascend to an altitude for best wind and its rotation also causes the Magnus effect. This provides additional lift, keeps the device stabilized, and keeps it positioned within a very controlled and restricted location. This is the latest technology in Energy sector and cheaper than other techniques and Eco friendly.

[1]. Alter,Lloyd."MagennAirRotorSystemFinallyFloats."Treehugger.com.May5,2008.(July7,
2008).http://www.treehugger.com/files/2008/05/magenn-air-rotor-floats.php
[2]. American Wind Energy Association. "awea.org." 2008. (July 7, 2008). http://www.awea.org/
[3]. Layton,Julia."HowWindPowerWorks."HowStuffWorks.2008.(July3,2008).http://science.howstuffworks.com/wind-power.htm