Voltage and reactive power optimisation of offshore wind farms based on terminal voltage control mode of DFIG

Abstract

In order to solve the problem that the voltage of the collector system rises and the loss increases in the offshore wind farm, the reactive power adjustment capability of the doubly-fed induction generator (DFIG) is studied. This study presents a method to optimise the system voltage and network loss with the terminal voltage of DFIG as the control target. The immune genetic algorithm is used to solve the voltage and reactive power optimisation problem of offshore wind farm in ensuring the voltage is within the allowable range when the active power out of DFIG changes. So that the reactive power adjustment capability of DFIG is fully used, both the system network loss and the reactive power compensation capacity are reduced, which verifies the correctness of the method.