Dynamic and Transient Behavior of Standard Test Bus System under Various Disturbances

Abstract

The renewable energy generation is increasing day by day. The renewable resources like small hydro plants, wind farms, solar plants, and biogas plants are used to generate electrical energy. The generation through renewable energy sources have been increased exponentially in last decade because of the adverse effects of conventional plants. India is the fifth largest wind generating country in the world. Initially generation through RES was distributed i.e. not connected to grid but as the penetration is increased drastically the concept of integration of renewable energy resources will be most significant in near future. Due to large penetration of renewable sources, the issues of operation, control, power quality, fault analysis, protection and relay co-ordination opens the new area for the researchers. As renewable energy generation is not continuous in nature and also plants are away from the load centers it creates various challenges while integrating with conventional system. In this project WSCC 9-bus system is considered as standard test bus system. Simulation work is carried out in PSCAD/EMTDC software. In this standard test bus system load flow analysis under steady state condition is performed. Analysis of the different types of faults (symmetrical and unsymmetrical) at different locations are carried out. Moreover the fault current is measured with and without wind generation. The solution to the problem allows the decision maker to quickly reach an optimal decision when considering the interconnection of renewable energy sources to a grid.