Modeling, Developing and Testing Protective Relays using MATLAB, Programmable Relays and Digital Simulators

This paper discusses application of MATLAB, programmable relays and digital simulators in modeling, developing and testing of protective relays. First, the issue of modeling of protective relays is addressed. The new MATLAB-based software capable of modeling digital relays by providing detailed models of the common components of contemporary digital relays is presented. Second, application of programmable relays for fast prototyping of certain class of protective relays and for developing real-time hardware models of digital relays is outlined. Third, application of digital simulators for testing physical relays is addressed. The way of using modeling, developing and testing to optimize the design and application is discussed.