Monitoring of Sag & Temperature in the Electrical Power Transmission lines
Sauvik Das Gupta1, Souvik Kundu2, Abhishek Mallik3

1Sauvik Das Gupta, Technical Consultant ESl, Kolkata (West Bengal), India.
2Souvik Kundu, B.Tech. Student, Heritage Institute of Technology, Kolkata (West Bengal), India.
3Abhishek Mallik, Partner ESL, Kolkata (West Bengal), India.

Manuscript received on 18 October 2012 | Revised Manuscript received on 25 October 2012 | Manuscript published on 30 October 2012 | PP: 43-45 | Volume-1 Issue-4, October 2012 | Retrieval Number: D0329091412/2012©BEIESP
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Abstract: For proper transmission of power in overhead transmission lines temperature control and sag monitoring are the two major parameters to be kept in mind. Electrical load variation and environmental changes affect the temperature in the transmission lines. For proper safety measurements these monitoring should be done on a continuous basis. Some of the ongoing temperature and sag monitoring methods that can be sited are the usage of stainless steel temperature probes, glass based sensors, thermocouples, RTDs, and Infrared sensors. However, all these methods have a disadvantage of having loosening of contacts. Cross sensitivity may also arise due to environmental contaminations. The disturbances caused by the different parameters can be stated as follows:- High temperature due to climate changes decreases the efficiency of electrical transmissions. Extreme weather conditions would increase the chances of failure rate of power lines. Temperature rise also results in an increase in thunder storms and results in the lightning strike of power lines. 2 degrees Celsius of temperature rise increases network losses by 0.04%. It is also found that operation of the conductors on high temperature reduces the mechanical integrity of the overhead systems. It is also clear that cumulative damage occurs to the Aluminium metal in the overhead conductors. Hence, in order to overcome these disadvantages, we hypothise the introduction of MEMS (Micro Electro Mechanical Systems) technology through PLZT(L. This is a temperature sensor, which has numerous advantages over the existing ones. The thin film of Lead Lanthanum zirconate titanate (PLZT) will be coated on nickel foil by chemical solution deposition and this will be fabricated as sensor using MEMS technology. The sensor in turn will be embedded in the transmission line at selected point wherefrom monitoring of temperature and sag is quite feasible. This sensor will be having high chemical stability , high mechanical and thermal resistances , good piezoelectric coefficients and enhanced sensitivity for which it will be reckoned to be a more accurate and versatile one.
Keywords: MEMS, PLZT, Ssag, Temperature Control

Scope of the Article: Nano Electronics and Quantum Computing