SIMTC: Current transformer model

The current transformer model developed is based on the proposal made by "Power System Relaying Committee (PSRC)", the IEC 60044–1 and 60044–6 standards and other technical documents. Therefore, this model proposes to combine the strengths of the PSRC model and IEC standards to verify, select, and validate current transformers used in power systems as the primary element that will deliver information to protection relays. EMTP/ATP was used as simulation platform through its ability to create programming blocks (Models function) and use TACS functions. With the digital model, it is possible to capture information of power system and deliver the results to analyze waveforms at the output of a current transformer. It is also possible to verify important sensitivities which are shown in the last part of the document.