Development of a battery step voltage to determine parameters of large PMG

Permanent magnet generators (PMG) parameters cannot be determined by using conventional test procedures due to the impossibility to control the magnetic field created by the rotor, so that new procedures need to be developed and standardized taking into account that the power of new PMG for large wind farms is increasing as is the need for power in laboratory facilities. A DC step voltage is an equivalent method that, analyzed with others, makes the determination of important PMG parameters possible. To validate the new method, it was also applied to a well know conventional synchronous machine using the IEC and IEEE methods. The comparison of results showed that de DC step voltage can help the parameter identification of large PMG for wind applications.