Control System and Method of Renewable Energy Generator for Improving Frequency Stability

摘要

The present invention relates to a system and method for controlling a renewable energy generator for improving frequency stability by using the stored energy of a renewable energy generator when an event occurs to improve the frequency stability through cooperative control of the synchronous generator along with an instantaneous increase in output. In this regard, in order to recover the stabilization frequency above the maximum steady state frequency deviation when an event occurs in a system in which a renewable energy source is connected to the power system, the stabilization frequency is formed lower than the maximum steady state frequency deviation, so that the frequency is the reference value. If it is determined that it is not recoverable, a renewable energy generator output control unit controlling a certain amount of output (ΔP) from the renewable energy generator to be increased for a certain time (ΔT) and then reduced to the original output; And a synchronous generator control unit for controlling the mechanical input of the synchronous generator to be kept constant, and allowing the automatic generation control to operate normally and recover the frequency to a reference value.