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PLN P3B Jawa Bali is changing its maintenance strategy from time-based and corrective-based maintenance to a combination of time-based, corrective-based and condition-based maintenance. Because of its crucial function in a power grid, PLN P3B Jawa Bali is developing the condition-based maintenance for 500 kV circuit breakers. The keys of such maintenance strategy are inspections and assessment. This...
On the transformer, the effect of thermal stress is aging of the solid insulation. Excessive thermal stress could damage the solid insulation. To avoid this, transformer condition monitoring systems could use thermal models to forecast the operating temperatures during dynamic loading. There are several thermal models of varying complexity, including the thermal models stipulated by the IEC and IEEE...
Maintenance on high Voltage/Extra High Voltage equipment can be divided into preventive maintenance and corrective maintenance. Mostly, the cost for doing a corrective maintenance is much higher than the preventive maintenance, beside of when an equipment break down, it will cause another problem such as customer dissatisfaction. These reasons bring the consequence to any electricity utility like...
Transformer is the most important and critical equipment in Transmission Line Grid. Maintaining power system reliability can be done by maintaining transformer in its normal ageing. Transformers are designed according to its operation environment. As the result of global warming, maximum hotspot winding temperature of the transformer will exceed its normal ageing limit. Thermal monitoring is one of...
Harmonics is a phenomenon that occurs at power systems caused by a non linear load. It would generate high frequency waves resulting from the multiplication of its fundamental waves. Transformer losses can be divided into losses with loads (load losses) and zero load losses (no load losses). Losses that are caused by harmonic current will cause an increase of copper losses and stray flux losses. Whereas...
Transformer condition should be maintained because of its importance to electricity network. Each utility, in this case PLN P3B Jawa-Bali, has to assure their reliability in order to maintain electrical power system stability by assessing transformer conditions. Once transformer condition attained, appropriate maintenance and operation strategy can be defined. The most important things influence transformer...
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