Comparative Study of Core Loss Models in Three-Phase Self-Excited Reluctance Generators

To avoid the environmental impact of the hazardous waste of conventional power generation, green renewable energy sources have been introduced as alternative clean-energy sources. One of these remarkable, exploited sources is wind energy. Self-excited reluctance generators (SERG) are used to convert wind power into electric power. Extensive research studies have analyzed the dynamic, transient, and steady-state performance of SERG. In most of these studies, core loss was neglected. However, different methods have been developed that take the core loss into consideration by adding a resistance (R
_e
) to the model of the generator. The value of R
_e
is considered as either (i) fixed, (ii) linearly proportional to the direct axis magnetizing reactance (X
_d
), or (iii) a polynomial function of X
_d
. This paper presents a comparative study of the above-mentioned methods under different operation conditions. The effect of neglecting the core loss on the analysis of the generator is also included.