електрична мережа electric network thyristor compensator of reactive power відновлювані джерела енергії start the electric motor Електроенергетичні системи та устаткування прямий пуск асинхронного двигуна тиристорний регульований компенсатор FACTS LC-filters Multivariable extremum seeking control PSO-method PSO-метод RES reactive power asynchronous motors of the comparable power capacitor bank circuits of asymmetrical non-periodic voltages and currents combined algorithm converter interfaced generation cosine condenser battery current harmonic distortion currents and voltages depth of reactive power control device direct start-up of an asynchronous machine direct start-up of asynchronous motor distributed voltage control distribution of ranked variables electrical network electricity market