CROSS CURRENT COMPENSATING CIRCUIT OF SYNCHRONOUS GENERATOR

PURPOSE:To obtain a voltage detectig characteristic proportional to only reactive current by connecting an auxiliary current transformer to a single-phase current detecting line, and supplying a current detected by the current transformer to a variable resistor connected to one phase of a voltage detecting line. CONSTITUTION:An auxiliary current transformer 32 is connected to a single phase current detecting line led through a current transformer 12 from the output bus of a synchronous generator 10. On the other hand, three auxiliary voltage transformers 34, 36, 38 are connected to the voltage detection line led through the voltage transformer 14 from the output bus, and a variable resistor 40 is connected. The current detected by the transformer 32 is supplied to the variable resistor 40, thereby compensating the detected voltage. When the cross current compensating circuit 16 is thus composed, the voltage detecting characteristics irrespective of the effective current can be obtained by using the sole current transformer, thereby obtaining the accurate voltage regulating rate.