Steady-state analysis of self-excited induction generator using real and reactive power balances

This paper presents an efficient, and flexible method of steady-state performance analysis of the three-phase self-excited induction generator. The method equates the total real and reactive power of the equivalent circuit to zero. Unlike the previous methods which equate total node admittance or total loop impedance to zero, the proposed method produces two real equations directly, without going through the lengthy, tedious, and error-prone derivations of the real and imaginary parts of the total admittance or impedance. The method is easy to formulate and flexible to include any changes in the circuit without repeating lengthy derivations to reanalyze the circuit. The method is evaluated on a laboratory-size 380-V, 750-W induction generator, and the results obtained were found to be in agreement with the published results obtained by several authors using the previous methods of analysis. Some of the results obtained using the proposed method are also verified experimentally.