METHOD OF CONTROLLING VOLTAGE OF INDUCTION GENERATOR Russian patent published in 1996 - IPC

FIELD: operation of induction generators. SUBSTANCE: induction generator is used for feeding autonomous electric circuit with time- and character-variable load. Voltage and current of network are measured optionally. Effective values of currents, voltages, phase shifts, losses of active and reactive powers in generator, non-equilibrium conditions of circuit are done taking changes in active and reactive powers of autonomous electric network into account in 0,01-0,02 s range. Capacitive load is determined from these values, required for sustaining preset voltage level. Different required sections of capacitive battery are determined and connected to network. Values of changes in active and reactive powers of autonomous electric network are checked periodically in every 15-30 electric deg. When changes in one measured value at least are 10-20% higher, these values are introduced into memory unit and two more additional measurements are done with the same time range, and probable changes in active and reactive powers are introduced. From value of probable change in reactive power the number of additionally commutated separate sections of capacitors is determined. Operation of engine or number of additionally commutated separate sections of ballast load are determined from value of probable changes in active power. Value of probable change in reactive power of autonomous electric network is determined from relation, where Qr(0), Qr(1), Qr(2), Qr(3) are reactive powers consumed by autonomous electric network at preceding and three subsequent measurements correspondingly. Value of probable change in active power of autonomous electric network is determined from relation, where Pr(0), Pr(1), Pr(2), Pr(3) are active powers consumed by autonomous electric network at preceding and three subsequent measurements correspondingly. EFFECT: improved accuracy; improved efficiency of operation. 3 dwg