| Summary: | 碩士 === 國立臺灣海洋大學 === 電機工程學系 === 103 === Because of Taiwan’s economic development, a larger number of industry and commerce are concentrated in the western to make the population increasingly saturated and also make the electricity consumption go up sharply in the western area. With the power consumption rose up gradually, the main transformer and line’aturated and also make the electricity consumption go up sharply in th(N-1) reliability criterion makes operation of the system is also gradually fall, resulting in the probable of restrictions on electricity use increase to affect the stability of power supply. To solve the above problem, need to build new equipment for power transmission and distribution or to reduce the requirement of electricity utilization in area. How to improve yield rate of main transformer to reduce the probable of restrictions on electricity use is a very important issue. In heavy load, the transformer oil will increase, even more than the transformer temperature specification. So transformer oil temperature control is very important.
In this paper, using thermal conductivity coefficient and let the transformer’s material modeling, deduced the thermal conductivity of transformer’s material. Then use this factor combined rate of loading to arise the relation of depletion, and calculate the transformer insulating oil temperature rise. Finally, compare the insulating oil temperature rise and international norms, calculate the cooling demand and not to out of the international norms. And decide the most save resources cooling system to control transformer insulating oil temperature rise to fit in with international norms.
Keywords: Insulating oil temperature rise ,Rate of loading , thermal conductivity coefficient, Cooling system
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