Parallel operation of aircraft A-C generators: Reactive load division and selective protection

THE parallel operation, as in today´s aircraft, of electric a-c generators supplying a common bus requires that the total system load be divided equally among the paralleled generators. Real load and RL (reactive load) division are regulated through the speed and voltage regulator respectively. This paper concerns RL division only and the co-ordination of a high-phase voltage-sensing regulator with the RL sharing circuit and over-voltage and undervoltage protection.