That event driven architecture (EDA) will compliment the data driven systems in future is evident from the current literature. In this paper, the use of event driven architecture (EDA) as a platform for supporting event oriented applications in power control centers is presented. EDA operates on the semantics of events and event patterns, which are easy to decipher, flexible, extensible and conform to the standard. The concept is explained with real-time congestion management procedure recently introduced in Indian power sector. The semantics of events pertaining to real-time congestion management are defined in terms of states and state transitions of an abstract state machine. The state machine is then used to define a minimal set of basic and complex event patterns, which are implemented using an open source event processing tool. The results show that the congestion state of the system is correctly identified, and can be used as decision support. The case study is indicative of a wider set of event oriented applications that can be supported by EDA at control centers and constituents.