Steady-state and dynamic characteristics of self-excited induction generators with resistive-inductive loads

The paper presents a detailed analysis of self-excited induction generators with resistive-inductive loads. A nonlinear dynamic model is derived that enables a unified analysis of both the steady-state and transient characteristics of the machine. Steady-state operating modes are first determined, and self-excitation boundaries are derived. Computations are straightforward and do not require iterations. The dynamic model is also used to compute the eigenvalues of the linearized system around an operating mode. Experimental data show good agreement with computational results using the dynamic model. It is found that the addition of inductance generally, but not necessarily, enlarges the set of conditions where self-excitation is possible, and increases the stability of the operating modes.