METHOD AND DEVICE FOR CONTROLLING COMBUSTION ENGINE TO DRIVE GENERATOR SET TO RUN IN PARALLEL

Provided are a method and a device for controlling an internal combustion engine driven generator set to run in parallel. The method includes: each time an internal combustion engine is started, a controller detects whether a voltage is outputted in an output voltage circuit, if it is detected that the voltage is outputted, a generator acts as a slave generator, and synchronizes phases of the output voltage of the generator and the detected voltage by taking the phase of the detected voltage as reference, and if it is detected that no voltage is outputted, the generator acts as a master generator; obtaining of respective active power and effective values of output currents; seeking of corresponding output voltage amplitudes in respective droop characteristic curves according to the effective values of the respective output currents, and seeking of corresponding inner power factor angles in the respective droop characteristic curves according to the respective active power; the droop characteristic curves of each generator have the same slope; and each generator is controlled to reach the respective corresponding output voltage amplitudes and inner power factor angles. Therefore, automatic power balance among the generators connected in parallel is implemented. When the multiple generators run in parallel, no additional device needs to be added, and a user does not need to perform any operation.