Grid voltage control with wind energy conversion system

In this paper the voltage control of distribution system in the presence of distributed generation (DG) had been investigated. In DG the major advantage is that the power is produced close to consumers. The presence of DG would greatly affect the power system operation and control such as voltage control in the distribution systems. In conventional distribution systems, voltage control equipments are operated based on the fact that the voltage decreases along the feeder. On-load tap-changer (OLTC) in Medium Voltage/Low Voltage transformers is used to control the voltage. This is altered in the presence of DG as it may cause the power flow reversal, which leads to excessive operation of OLTC. The key objective of this work is to develop a method to coordinate voltage source inverter (VSI) based DG converter OLTC properly so that they do not counteract each other operation, and provide steady state voltage and reactive power control.