Fault study on power system using powerworld simulation software

Mohd Nizan, Nurul Husna (2020) Fault study on power system using powerworld simulation software. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Within an electric power system, any irregular electrical current is a fault or fault current. A short circuit for example is a fault in which the current bypasses the normal load. An open-circuit fault arises if some failure interrupts a circuit. A fault may involve one or more phases and ground in three phase systems or can occur only between phases. Present flows into the earth through a ground fault or fault on the surface. For certain cases, the prospective short-circuit current of a predictable fault can be calculated. Protective equipment can detect fault conditions in powers systems and operate circuit breakers and other equipment to minimize service loss due to failure. Since it is beyond of our capacity to see the fault happens in the power system and to see the parameter involves when the fault occurs. This report presents a 5-bus system model and 10-bus system model with PowerWorld simulator includes fault analysis as design verifications to effect of the fault to the power system and the load flow in the system and the contingency operation were included. In order to obtain a reliable model, the basic knowledge of power system components must be met in the selection of initial data according to specific criteria. In the verification stage, the proposed model has been tested with fault analysis to simulate the proposed model responses in single – line – to – ground fault, line – to – line fault and double – line – to ground fault. The measured parameter in these stages are focused on the bus voltage magnitude and its phase angle as one of the reference indicators for the state of power system operation. There are also the load flow analysis and the parameter that have been investigated are voltage magnitude and the phase angle. The fault would result in voltage being zero at the failed phase, while voltage changes from their nominal values at the other 2 un-failed phases

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