Energy Conservation of In-House Auxiliary Power Equipment in Power Plant Processes

In-house auxiliary power (AP) is used to drive the in-house equipment used for that particular unit. The power supply to this equipment is fed from unit auxiliary transformers (UATs). In-house AP is subclassified into in-house high tension (HT) and in-house low tension (LT). The total in-house AP varies between 6.5% and 8.3% of gross power generation including excitation power of 0.22%-0.30% (power used for the static excitation system of the generator) and losses in the generator transformer (GT) of 0.25%-0.35%. The total in-house AP forms about 72.5%-81.3% of the total AP of the plant.