VOLTAGE REGULATION PROCESS FOR PORTABLE MIDGET HYDROELECTRIC POWER PLANT Russian patent published in 1994 - IPC

FIELD: voltage regulation technology. SUBSTANCE: hydraulic turbine runner is accelerated at primary load. Direct current is applied to field winding of premagnetized AC generator rotor. Supply voltage is regulated in useful load circuit by varying control parameter according to results of check of mentioned supply voltage current value. Primary load is limited to value affording self-excitation of generator due to preliminary magnetization of its rotor until rated AC voltage is obtained which is supplied to field winding. When useful load is connected, field winding current is used as control variable which is regulated by means of integrating relay. Generator stator circuit is shorted out by field winding with aid of electromagnetic relay inserted in stator circuit until rated value of AC voltage is obtained. EFFECT: improved reliability of voltage regulation. 2 cl, 3 dwg