Measurement of reactance of synchronous machines at standstill

When feasible, testing high power synchronous machines in a classical steady state regime requires a great deal of electrical power. This paper presents a method and its implementation for testing electrical machines in transient regimes, aiming at the reduction of the required power and minimization of the testing time. The direct-axis and quadrature-axis reactances are indirectly found by processing the acquired digitized samples of the step response of the stator current of a locked-rotor synchronous machine. Experimental results that have been obtained in a series of formal tests, illustrates the large applicability of this method