Abstract
The continuous monitoring of transmission line protection relay is desirable to ensure the system disturbance such as fault inception is detected in transmission line. Therefore, fault on transmission line needs to be detected, classified, and located accurately to maintain the stability of system. This project presents design enhancement and development under voltage relay in power system protection using MATLAB/Simulink. The under-voltage relay is a relay that has contacts that operate when voltage drops below a set voltage which is used for protection against voltage drops to detect short circuit and others. This study is carried out for all types of faults which only related with one of the parallel lines. For the overall of operation conditions, the sample data were generated for the system by varying the different fault types and fault location. This design system proposes the use of MATLAB/ Simulink based method for fast and reliable fault classification and location for a various type of fault.
Highlights
The power system is of essential importance in electrical power systems
Under voltage relay is used for protection to detect the fault location through the distance with the accurate fault type
To analyse the effect of various categories of faults such as phase-to-phase, line-toground, double-line-to-ground, and three-phase-to-ground faults, at their specific location based on the load voltage profile
Summary
The illustrated and discussed the method of a three-phase load fed by a three-phase voltage power source simulation. Analyze the effect of various types of faults at their specific location based on the load voltage profile. The project was carried out by using the MATLAB/Simulink to simulate the circuit. The explanation of how designed the circuit by using Simulink of MATLAB. Simulink is a powerful tool for simulating the power system protection relay. The first part for design from began to end model the power system protection from generation to load and relay and circuit breaker. The final circuit of the designed protection system.
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