The article provides a library for modeling relay protection in a Simulink environment.
Using modern software tools, such as Matlab / Simulink, can significantly simplify the analysis of various complex systems. Matlab scripts allow you to automatically run Simulink schemes with changing various parameters.
A differential relay is used in the implementation of the basic protections of various equipment: generators, transformers, power lines, etc. The use of a relay with a braking characteristic prevents the non-selective action of the protection.
The power direction relay is used in the implementation of directional protections, which allow for operation only with a certain power direction in a certain network operation mode.