iosr-JEEE   Volume-12 ~ Issue-5 ~ Sep-Oct 2017

Abstract: With the large-scale application of seamless rail in China, the workload of front-line railway maintenance workers has also greatly increased, and the traditional manual "two times measurement method" has been unable to meet the requirements of the rapid operation of patrol workers. In this context, in order to realize the accurate and rapid measurement of the absolute position and slight creeping displacement of motion direction of seamless railway track, a wireless position measuring device based on PSD position sensor for railway track absolute position and displacement is presented............
Key Words: PSD position sensor, seamless rail, track absolute position, micro creeping displacement of track, data processing

[1]. Lu Xiaohong, Wang Wentao, Si Likun, et al. Motion track tracking and measuring device of robot manipulator based on dual PSD [J]. Manufacturing technology and machine tools, 2015(6):61-66.
[2]. Liu Jiaoyue, Dong Dengfeng. Application and Research of Laser Tracker's Optoelectronic Aiming Technology Based on PSD [J]. Instrument Technique and Sensor, 2015(7):98-100.
[3]. Xia Limin, Liu Tao, Xiao Yongliang. Track distress detection of high speed railway based on visual attention model [J]. Information and control, 2015, 44(3):353-358.
[4]. Chen Qiang, Liu Liyao, Yang Yinghui, et al. Accurate matching and modeling of high speed railway vehicle close range images [J]. Journal of Railway Engineering Society, 2015, 32(1):38-43.
[5]. Yang Haima, Ma Caiwen, Wang Jianyu, et al. Research on morphological filtering method in photoelectric position sensor [J]. Laser and Infrared, 2015, 45(9):1072-1075.

Abstract: The Solar energy is the most important renewable energy in the basic energy, biomass, wind energy, ocean energy, water and so on from the solar energy, broadly speaking, the solar energy above all kinds of renewable energy. Solar energy is a kind of renewable energy, it refers to the direct conversion and utilization of solar energy. Solar thermal power generation using solar energy heat generation technology which converts solar radiation energy into heat energy by a conversion device and uses thermal energy to generate electricity is also a technical field of the present invention. The conversion of solar radiation energy into electric energy utilization solar photovoltaic power generation............

Keywords: Solar energy, solar photovoltaic power, solar charging process, photoelectric effect, save human resource

[1] M SUNSHINE TRACKING
[2] http://www.dzdiy.com/html/201105/22/Automatic-Sunshine-Tracking.htm
[3] Microcontroller
[4] http://www.ermicro.com/blog/?p=1461

Abstract: The reliability of electric power distribution networks has gained greater interest in recent times. One of the main causes of frequent failure of electric power distribution networks is exceeding the current carrying capacity of the conductors being used. That normally happen as a result of failure of utility companies to upgrade the conductor to a bigger size as the load increases due to lack of resources. The projected annual load growth for metropolitan areas in Ghana averages 8% per annum. For that reason, the projected load growth for the Sekondi-Takoradi metropolis for the years 2020, 2025 and 2030 was estimated using the 8% annual load growth rate. The modelling and the simulation results indicated that aluminium conductor of size 265 mm2 is required to sustain the projected load growth beyond the year 2030 but will require switch shunt capacitor compensation.

Keywords: Simulations, Modelling, Distribution network, Contingency analysis, Shunt capacitor

[1]. T. Gonen, "Electric Power Distribution System Engineering", 2nd edition, CRC Press, Boca Raton, 2008, pp. 1 – 6.
[2]. X. P. Zhang, C. Rehtanz and B. Pal, "Flexible AC Transmission Systems: Modelling and Control", Springer-Berlin, 2006, 400 pp.
[3]. B. Venu, C. Bhargava, and K. Sumanth. Reliability Assessment of Radial Distribution System by using Analytical Methods. International Journal of Professional Egineering Studies, 4(4), 2014, pp. 185 - 195.
[4]. K. Kivikko, "Assessment of Electricity Distribution Reliability- Interruption Statistics, Reliability Worth, and Applications in Network Planning and Distribution
[5]. Regulation", PhD Thesis, Tampere University of Technology, Tampere, Finland, 2010, pp. 58 - 59.