Fault locator simulation using MODELS language

In this paper, a time domain model of a fault locator is represented using the MODELS language in the ATP version of EMTP. The fault locator model consists of five parts: input analog filter; sampling hold and digital filters; magnitude and phase calculation; fault locating algorithm; and statistical output procedure. Using different simulation cases, various fault types are modeled, considering the fault resistance to be constant or nonlinear and then considering the input device error. The calculated results are presented and discussed, and confirm the validity of representing the fault locator in a time domain simulation using MODELS.