Alternatives to the Frequency Control of an Islander Wind Farm.

Abstract

The technical problems caused by the connection of wind farms to the electrical grid have encouraged different works in order to analyse their impact in normal situation as well as under disturbances. The most common electrical disturbances are symmetric and asymmetric short circuits that could damage both the wind farm and the network. In this case different relays in order to protect the wind farm are being developed. Islanding operation of wind farms is a particular case of abnormal situations. Nowadays, wind farms are forced to stop as soon as their disconnection is detected, but several proposals are being developed in order to maintain their operability.

This paper reports the study carried out to compare two different approaches of a frequency control for islanded wind farms. The equipment necessary to implementing each approach in a real wind farm as well as respective results are described. The strategy has been verified in a simulator implemented as a C-MEX S-Function for MATLAB, and has been applied to the wind farm of El Perdon.