Optimizing generator reactive power resources

A method is described for selecting generator step-up and auxiliary transfo rmer tap positions to provide the desired reactive power requirements in a coal burning power plant. It is shown how a generator could be made to abso rb reactive power, when previously unable to do so, by adjustment of tap po sitions on the generator step-up and auxiliary transformers. The approach d escribed provides an indication of the range of reactive power outputs that are available for different tap positions. This information would facilita te the alteration of transformer tap positions to make more effective use o f generator reactive power resources.