Calculation of Steady-State Performances for Design of a Pumped Storage Generator Considering Cross-Magnetization

A simple magnetic circuit of a 279MVA pumped storage generator is presented. A method for calculating steady-state electrical performances using the circuit is described. Magnetic saturation including cross-magnetizing phenomenon is considered in the method. The saturated reactance, field current and load angle are calculated easily from the method without much computational effort as compared with the finite-element method. Despite the magnetic circuit is simple, the calculated reactances at various load conditions of the generator using the method agree with the measured and the FEM values. In particular, the values of the calculated mutual reactances between d- and q- axis and between field and q-axis show good agreement with the FEM values.