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In transformers, in addition to the primary and secondary coils, there are several other important components and accessories in which the insulating material is one of the most critical components of a transformer. Sufficient insulation between different active parts are necessary for safe operation. Adequate insulation, it is not only necessary to insulate the coils from each other, or from the core and tank, but also guarantees the safety of the transformer against accidental surges, but with the growth in size and complexity of power stations, transformer is facing insulation problems. The evaluation of the transformer overload capacities certainly leads to complex variables that affect the operating life of the power and distribution transformer. In this study, the long-life calculation is performed on the basis of two experiments, which are related to the insulation degradation of the mineral oil and cellulose paper such as by adding different types of nano-particles to the mi...
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Distribution transformer is a component in distributing electricity from distribution substations to consumers. Damage to distribution transformers causes continuity of customer service to be disrupted (power cut or blackout occurs). The length of the PLN electricity network requires a transformer to distribute electricity to serve consumers and how to maintain the transformer. The daily load curve of a peak load for housing, shops and factories / industries varies. Load served 200 kVA distribution transformer cannot serve the load on housing, shops and factories / industry. The method used is the replacement of a distribution transformer with a capacity of one stage greater or the replacement of a distribution transformer with a capacity of two levels larger. The distribution transformer carried out by the research is a capacity of 200 kVA replaced by 250 kVA. The ability of a distribution transformer cannot accommodate a load which will increase as an area is advanced. Observation...
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Transformers Magazine, 2014
n our industry there are often terms or buzzwords that many of us use with liberty but might not fully understand their meaning.
The Service Reliability of Aging Power Transformers
Power transformers are aging ahead of time since the insulation system is vulnerable to electrical stress, moisture content, dissolved oxygen and excessive heat. For improving on-line the effectiveness of the existing maintenance techniques this paper suggests two economically rewarding and scientifically sustainable procedures. One is to quantitatively remove the Oxygen dissolved in the oil. A new ASTM Test can prove that this troublemaker is finally gone. Thus, a century old deficiency is solved. Removal of the water adsorbed by the paper insulation of windings is the second. Consequently, the insulation of transmission transformers can be significantly improved. As a result, the internal insulation of windings increases, the dielectric losses goes down, the heat dissipated in the atmosphere diminishes and the service reliability improves. This cost effective and environmentally friendly method was successfully tested in real life conditions and its economic and technical benefits were accurately measured.