Equation (2) indicates the relationship between the voltage
and power transferred into the system. The voltage difference,
ΔU, can be calculated with load flow methods as well as other
simulation techniques [11]. The voltage at PCC should be
maintained within utility regulatory limits. Operation of wind
turbines may affect the voltage in the connected network. If
necessary, the appropriate methods should be taken to ensure
that the wind turbine installation does not bring the magnitude
of the voltage outside the required limits