Power system relay protection is a major subject in a power system course. Within the power industry,
relay protection is an important measure to guarantee safe, stable and reliable operation of power system.
In order to cultivate students’ ability of analyzing and solving practical problems, power-system relay
protection laboratories have been built in campus and the experiment teaching has been carried out.
However, in distance education, the cost and difficulties of providing field experience to the students have
limited the teaching of power system relay protection. Thus, making full use of advantages of multimedia
and network technology, developing power system relay protection experiment in E-learning has become
an imperative.