Author(s)

Nader Barsoum, Christoper Bin Asok, David Ting Szu Kwong, Clifford Gan Thien Kit

Department of Electrical and Electronic Engineering, University Malaysia Sabah, Kota Kinabalu, Malaysia.

It has been recognized recently that when injecting renewable energy source power to a load bus which connected to a distributed feeder in a power grid system, a stability problem occurs particularly when having high fault duties that exceeding the circuit breaker ratings at some substations. In this paper an analysis of power flow, short circuit, stability and protection is given in detail to an example of limited 7-bus power grid system. Comparison is illustrated between power grid with and without distributed generators regarding bus voltages, fault currents, critical power angles, selected current transformers and over current relay settings in each bus.

Power Grid, Bus Voltages, Fault Currents, Critical Angle, Critical Clearing Time, Over Current Relay Setting

Barsoum, N. , Asok, C. , Kwong, D. and Kit, C. (2017) Effect of Distribution Generators on Stability in a Limited Bus Power Grid System. Journal of Power and Energy Engineering, 5, 74-91. doi: 10.4236/jpee.2017.59007.