Optimal tap setting and VAr compensation effect on energy consumption of electrical auxiliary system of steam power plants

Reduction of energy consumption in electrical auxiliary system (EAS) of steam power plants leads to considerable energy conservation that can be fed into a network. To reach this goal, two definite suggestions i.e. tap setting of transformers and installation of reactive power compensators have been presented, and analyzed from many aspects for unit 1 of NEKA steam power plant in Iran. Studies performed by means of a developed program, showed that implementing the suggested ideas leads to the significant energy saving over the lifespan of the power plant. The developed program provides a tool to determine optimal tap setting and reactive power compensators for any steam power plant.