Differential Relay Reliability Impliment Enhancement of Power Transformer
نویسنده
چکیده
This paper presents an improvement of digital differential relay reliability for protecting a large power transfer is discussed. First, the Fourier sine and cosine coefficients required for fundamental, second third and fifth harmonies determination have been calculated using rectangular transfer technique. Then, these harmonics have been used in harmonics restrain and blocking techniques used in differential protection system. Simulation testes have been carried out on a variety of magnetizing conditions (normal aperiodic inrush and over excitation conditions) using Simulink? MATLAB. Index–terms: Power transformer, Differential protection, Inrush current, Fourier coefficients, Rectangular transfer techniques.
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