The invention discloses a simulation run management server used for simulation applications of a power system, and also discloses a simulation object discovery method being realized based on the simulation run management server at the same time. In the simulation run management server, the simulation applications are packaged according to an object-oriented method to build power simulation objects. When some simulation application is added into a power network simulation system, the simulation application publishes data and operation which can be supplied and received to the power network simulation system through a publishing/ordering mechanism, and automatically discovers all needed simulation objects and obtains the current state of the simulation objects through a call-back mechanism; and other simulation applications also obtain the simulation objects and the current state thereof published by a new simulation application at the same time. According to the power network simulation system which is realized based on the method, a receiver does not need to know the position of the simulation object and the simulation application supplying the ability. The power network simulation system has the characteristics of transparent position and plug-and-play. The method can be used for quickly building complex power network simulation systems.