Modelling And Assessment Of Transformer Differential Protection In Power System Network Using PSCAD Software

Zakaria, Muhamad Rozairi (2016) Modelling And Assessment Of Transformer Differential Protection In Power System Network Using PSCAD Software. Project Report. UTeM, Melaka,Malaysia. (Submitted)

Text (24 Pages) Modelling And Assessment Of Transformer Differential Protection In Power System Network Using PSCAD Software.pdf - Submitted Version Download (382kB)

Abstract

The transformer is commonly being used nowadays in order to transfer the electrical power from the power plant to transmission line and also distribute it to the people in the distribution system.The power transformer is an important electrical equipment that should be protected.It is because if there are fault current flow through the transformer,it can make the transformer damage and also will harm the human lives.The protection of transformers means that to protect the transformer from internal fault such as fault current.In order to analyze the protection performance for transformer,this thesis presents a modelling and assessment of transformer differential protection in the power system network using PSCAD software.The modelling of the protection system uses a dual slope current differential relay that acts as a protection tool.This dual slope current differential relay is used to monitor the current that enters and leaving the transformer on the primary side and secondary side.The simulation result shows that the relay not show the tripping signal when the transformer in balance condition or the current that flow through it is a normal current.When fault current exist,the dual slope current differential relay send the signal to circuit breaker to trip the circuit.The value of the online plotting graph for the relay shows the value of one.The PSCAD software is used because it is easy to model the circuit and simulate it to get the result.When the simulation is run,the location of fault can be determined. This is help to get more understanding about differential protection.

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