Исследование управляемой гибкой связи турбины и генератора микроГЭС в автономной электроэнергетической системе

Studies aimed at ensuring synchronous parallel operation of permanent magnet generators of a micro HPP in a self-contained power system that use a controlled flexible coupling between the turbine and generator were carried out. The need of carrying out this study is stemming, among other things, from the problem of ensuring electromechanical compatibility during parallel operation of generators having different parameters of the mechanical inertia time constants of electrical machine rotors. Possible versions of solving this problem are reviewed, and their advantages and drawbacks are analyzed. The concept based on using a controlled flexible coupling between the generator and turbine is proposed as a promising solution of this problem. The mathematical models of the system are presented, and the laws and algorithms for automatically controlling the generator rotation frequency are drawn up. The simulation and physical modeling oscillograms presented in the article show how synchronous parallel operation of permanent magnet synchronous generators is maintained in a self-contained electric power system under the conditions of a three-phase short-circuit fault in points located at different electrical distances.