COMTRADE-Based Fault Information System for TNB Substations

This paper describes the process of extracting the fault information from common format for transient data exchange (COMTRADE) record. The COMTRADE format record was obtained from the distance relay recording device, provided by the Protection Department of Tenaga Nasional Berhad (TNB). A graphical user interface (GUI) simulation program using MATLAB was developed which implements the one-cycle cosine filter relaying algorithm to digitally filter out the unwanted signals at system´s fundamental frequency from the COMTRADE record. This work aims to help the TNB protection engineer to have a faster solution in parameter extraction from protective relay recorded from substations in COMTRADE format.