A supporting platform for new generation of EMS based on PC cluster

This paper introduces a PC cluster based supporting platform, called wide logic grid (WLGrid), for new generation of EMS. This platform has an open and loosely coupling plug-in architecture, which allows components developed individually to be easily plugged into the system. A component-based development (CBD) pattern is used to develop this platform, which can make software modules loosely coupled and easy to be integrated together. And the master/slave architecture is used to distribute tasks among PCs in the cluster. Resorting to ldquoactive objectrdquo pattern, different calculation tasks are encapsulated and calculated in parallel. ldquoBroadcastrdquo technology is used to locate the computation resource dynamically, which gives high flexibility in resource management. A member in the PC cluster can replace the role of others if necessary. Peer-to-peer (P2P) technology is used to accelerate synchronization of large bulk of data in the PC cluster. This WLGrid has been implemented in a real power system control center in China.