Symmetrical and Asymmetrical Fault Studies of Wind-Farm Embedded Power Network

In present electrical power system, there is a growing interest on study and analysis of AC grid connected wind power generation by research community throughout the world. In the same time there is always a concern for power system protection, and huge emphasis is given to studies based on various obstacles encountered by a power network under various fault conditions. In this context, this paper provides a thorough investigation of various types of faults occurring in a 225/90 kV power network, the operating frequency being 50 Hz., using simulations conducted in DIgSILENT PowerFactory Version 15 software. The concerned power system consists of two wind farms (one connected to the east side of the grid and the other connected to the west side). Symmetrical and asymmetrical fault conditions are simulated at various locations of the network. In the study, various responses of individual voltages and currents at both the bus bars and the generator side using many parameters are observed. In addition, various plots have been shown to minutely observe the effect of the fault with respect to time under varying operating conditions. This study will surely aid in providing variable insights regarding power system protection and modelling.