Paper Details

The future of electric power distribution systems is one that incorporates extensive amounts of advanced metering,distribution automation, and distributed generation technologies. Most distribution systems were designed to be radialsystems and the major philosophies of their protection, namely, selectivity and sensitivity, were easily achieved. Settings forovercurrent protective devices were static and based on the maximum load downstream of its location, with little concern ofmajor configuration changes. However, the integration of Distribution Generators (DGs) in radial distributions systemscauses bidirectional power flows and varying short circuit currents to be sensed by protective devices, thereby affecting the seestablished protection principles. Since the protective coordination will be lost if the fault current flowing through anyprotective device is changed, this may lead to the large damage in system and the decrease in system reliability. Due to thefast-paced changing technologies in the field of electricity market liberalization, the incorporation of DG along with itsvarious distributed resource technologies have led to a profound change in electrical power system. Besides many positiveimpacts of incorporation of DG into the electrical power system, it has introduced many inherent technical problems such asmiscoordination, reliability degradation and stable islanding

Pragnesh H Shah, “IMPACT OF DISTRIBUION GENERATION ON PROTECTION COORDINATION”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 1, Issue 12, pp. 210-219, December 2014.