The influence of connecting a wind farm on the gird
voltage is directly related to the short circuit power level. The
2
short circuit power level in a given point in the electrical
network represents the system strength. If the voltage at a
remote point can be taken as constant, Us , and the short circuit
power level SSC in MVA is defined as Us
2
/ Zk where Zk is the
equivalent impedance between the points concerned.