Voltage and frequency control with neutral current compensation in an isolated wind energy conversion system

This paper presents a voltage and frequency controller with neutral current compensation in an isolated wind energy conversion system employing a capacitor excited asynchronous generator (CEAG). In isolated applications, because of unavailability of the neutral point at the generator terminals, it is difficult to access the neutral wire from the source. In view of this, a transformer integrated with a voltage source converter (VSC) based voltage and frequency controller is used to provide the neutral terminal for the single phase consumer loads. A star delta transformer is used to provide the path for flow of the load neutral current. The complete standalone system is modeled and simulated for isolated wind energy conversion system in MATLAB using Simulink and power system blockset (PSB).