COMPENSATOR FOR VOLTAGE DROP OF LINE

PURPOSE:To compensate voltage with high reliability by adding a compensating voltage signal corresponding to deviation between the output voltage of a reverse droop circuit detecting the voltage of a generator and set voltage to set voltage. CONSTITUTION:The reverse droop circuit 24 is connected to the main circuit of the generator 10 through a current transformer 20 and a transformer 22 for a meter. An analog computing element 26 outputs deviation between the output voltage of the reverse droop circuit 24 and a voltage set signal inputted to an automatic voltage regulator 18. An analog comparator 28 excites a relay 30 when a deviation signal is positive, and excites a relay 32 when the signal is negative. A digital setter 34 outputs a line voltage-drop compensating signal increasing or decreasing in response to the operation of excitation of the relays 30, 32. An analog computing element 40 adds a set voltage signal from a voltage setter 42 and the line voltage-drop compensating signal, and transmits the value over the automatic voltage regulator 18 as a voltage set signal.