ВПЛИВ КОНСТРУКЦІЇ ОБМОТКИ СТАТОРУ СИНХРОННО-РЕАКТИВНОГО ГЕНЕРАТОРА НА ПІДВИЩЕННЯ ЙОГО ЕНЕРГОЕФЕКТИВНОСТІ

The requirement of modern energy industry is the creation of highly efficient AC electric generators. They are widely used in many energy devices and facilities, such as wind power plants, diesel generators, as sources of electricity in railway, aviation and road transport. Synchronous-reactive generator with a double stator winding is a promising source of electricity capable of operating effectively in many energy facilities and systems. This work is devoted to the analysis of the influence of the design of the double winding of the stator of a synchronous reactive generator on the output power characteristics and the determination of recommendations for the design of this type of electrical machines. Synchronous reactive generators can operate in isolation or in the grid connection mode. For the grid connection mode, the necessary excitation is obtained from the grid. This type of generator is considered in the work. The voltage increase in the case of an autonomous synchronous reactive generator is achieved by self-excitation. The conducted studies of a synchronous-reactive generator with main and exciting stator windings showed that there is a significant dependence of the characteristics on the design of these windings. The considered variant with a single-layer arrangement of both windings in the stator slots is characterized by the fact that there are large pulsations of the rotating moment and significant harmonic components in the output voltage curve. The two-layer arrangement of the main and exciting windings of the stator showed the best results in the analysis of the synchronous reactive generator. However, studies have shown that the mutual arrangement of the phases of the main and exciting windings also has a great influence on the parameters of the synchronous reactive generator. The results of the calculation experiments determined the best option for the two-layer stator winding, namely with a phase shift of 2 slots from each other. This gives a significant improvement in the vibroacoustic and energy characteristics of the synchronous reactive generator and allows you to obtain a high efficiency value.