Efficiency Improvement Methods of Independent Wind Electric Installation with Programmed Control

Abstract

Relevance justification of effective automated control method of independent wind electric installation on the basis of voltage feedback and parameters of inductance x1, reduced inductance x′2, phase resistance of starter winding r1, reduced phase resistance of starter winding r′2 is made under different conditions of electric installation operation to minimize the time of phase voltage regulation transient process of wind turbine generator, that promotes quality improvement of self-excitation and reliability indicator improvement of energy supply of the basic control under insufficient information of meteorological and electric power conditions significaltly changing in time. The review of basic ways to control independent wind electric installations which has shown their negative sides is made, that revealed their negative sides like low execution speed and reliability, lack required voltage control quality, idle excitation current distortion leading to voltage sine curve distortion of the asynchronous generator, and providing no relay protection or the automatic switch and automation operating mode control. The differential equation of wind turbine rotor angular speed is composed. Transfer functions of dynamic links for generator phase voltage automatic control of wind turbine taking into account wind speed, rotor winding current, inductance, rotor winding phase resistance, reduced stator winding phase resistance are plotted. The block diagram imitating model is constructed and schedules of transient processes with zero and non-zero delay were plotted providing delay negative effect development decision making on stability of wind turbine generator phase voltage and to establish method of relevant system preparation to external disturbances vanishing above mentioned disadvantage.