Khomenko V. Electromechanical complex with energy storage in the synchronous generator excitation circuit

The dissertation is devoted to the solution of the actual scientific problem of increasing the reliability of power supply of consumers of comparable power from the electromechanical complex in dynamic modes of loading of the comparative load due to the acceleration of excitation with the use of capacitive energy storage devices and the establishment of the laws and dependencies of their influence on the modes of operation of synchronous generators, and on this basis the development of calculation methods, modeling and creation of new control systems for electromechanical complexes. A control algorithm of the excitation circuit of the electromechanical complex is proposed and validated, taking into account the change of the power circuit and the parameters of the excitation circuit in the function of the magnitude and sign of the derivative of the electromagnetic moment at the generator torque angle when connecting consumers of comparable power. At the test stand, the dynamic modes of the synchronous generator operation with a power of 12 kW, when connected to it asynchronous motor with a short-circuited rotor with a power of 11 kW, were investigated. The time to reach the excitation of the forced value by current with the uncompensated circuit is 1 sec, and with the capacitive energy storage device – 0,01 sec. In this case, the dynamic voltage loss is 39 %, compensation of electromagnetic inertia in the same conditions provides a voltage drop of no more than 11 %. Key words: synchronous generator, electromechanical complex, the capacitor store of energy, excitation system, automatic regulator of excitement, mode of stabilization.