C.R. Ozansoy, A. Zayegh, and A. Kalam (Australia)
Corba invocations, communications, control, reliability, middleware, OPNET, ORB, substation automation, process modelling.
A power system, being one of the most complex distribution systems, consists of objects spread over the system with separate address spaces and remote method calls. In this paper, we will focus on one of the most important distributed object platforms, the CORBA. Common Object Request Broker Architecture (CORBA) is an object-oriented standard for distributed object systems, which is implemented using the Object Request Broker (ORB) specification of the Object Management Architecture (OMA). CORBA architecture consists a client object, a server object, an IDL Stub, an IDL Skeleton and an ORB. CORBA makes the communication between these various components possible through the use of a method involving twelve steps of invocations. This paper aims to show how the process modelling of the CORBA invocations can be done in the OPNET environment. Then the designed model will be used to simulate point-to-point power system network architecture with TCP and UDP protocols to clearly show the need for a trade-off mechanism between reliability and transmission delay constraints of a real-time power system communication network
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