METHOD FOR CONTROLLING TORQUE OF SMALL HYDROPOWER GENERATOR IN RESPONSE TO INFLOW RATE FLUCTUATION WITHOUT LOSS OF LINE FREQUENCY SYNCHRONIZATION

摘要

The present invention relates to a device and a method for controlling the torque of a small hydropower generator in response to inflow rate fluctuation without the loss of line frequency synchronization, the device and the method being capable of supplying electric power continuously to an electric power system without the occurrence of loss even though an inflow rate changes. In addition, the device comprises: an encoder provided on the rotation shaft of a generator rotating by a hydraulic turbine and sensing the number of rotation of the rotation shaft of the generator; and a control means controlling the torque of the generator in accordance with the number of rotation, of the generator, which is detected by the encoder, so as to control driving torque in proportion to the detected number of rotation, controls the generator in which the driving torque is set in accordance with the torque supplied by an average inflow flow rate, so as to detect a change in inflow rate by detecting a change in the number of rotation, of the rotation shaft of the generator, according to a change in actual inflow rate, and adjusting the driving torque of the generator so as to correspond to the detected number of rotation of the rotation shaft, thereby enabling the generator to be continuously operated without stopping even though the inflow rate changes.