Styvaktakis (2002) Fault measurements of this nature are primarily used to determine the correct operation of protection equipment and the underlying causes are not routinely associated with individual measurements. Management of Waveform Data The original waveform data recorded on digital fault recorders is stored in the IEEE C37.111 Common Format for Transient Data Exchange (COMTRADE). These files each represent a unique fault event measurement. The following data is extracted for characterisation: sampling rate, start date, start time, faulted phase, distance-to-fault, red phase current and voltage , white phase current and voltage , blue phase current and voltage, neutral phase current and voltage, number of samples and time. The data is imported into a Matlab structure with each of the abovementioned items stored within the structure. An array of structures is compiled with each individual measurement being a unique structure in the array (file name is associated for identification). This is implemented to enable bulk signal processing of waveform data by repeating the same calculations inside a loop to obtain the desired waveform characteristics. Symmetrical Component Analysis The Fortescue symmetrical component transformation is applicable to the steady state conditions that follow the fault transient condition (Fortescue 1918).
Styvaktakis (2002) Fault measurements of this nature are primarily used to determine the correct operation of protection equipment and the underlying causes are not routinely associated with individual measurements. Management of Waveform Data The original waveform data recorded on digital fault recorders is stored in the IEEE C37.111 Common Format for Transient Data Exchange (COMTRADE). These files each represent a unique fault event measurement. The following data is extracted for characterisation: sampling rate, start date, start time, faulted phase, distance-to-fault, red phase current and voltage , white phase current and voltage , blue phase current and voltage, neutral phase current and voltage, number of samples and time. The data is imported into a Matlab structure with each of the abovementioned items stored within the structure. An array of structures is compiled with each individual measurement being a unique structure in the array (file name is associated for identification). This is implemented to enable bulk signal processing of waveform data by repeating the same calculations inside a loop to obtain the desired waveform characteristics. Symmetrical Component Analysis The Fortescue symmetrical component transformation is applicable to the steady state conditions that follow the fault transient condition (Fortescue 1918).