Use of CIM standard in power system modeling & enterprise wide messaging at California ISO

California Independent System Operator Corporation (CAISO) is a not-for-profit public benefit corporation in charge of managing the electricity flow along California´s open-market wholesale power grid. Recently, the CAISO implemented the nodal LMP electricity market based on full network model and upgraded its infrastructure with new state of the art technology. The implementation of new electricity market and the Service Oriented Architecture (SOA) and enterprise service bus based integration required many systems to work together to assure grid reliability and efficient and economic operation of the electricity market. The new systems were acquired from different applications Vendors and this created an integration challenge. This paper summarizes how CAISO leverages IEC TC57 Common Information Model (CIM) for the network models and enterprise wide messaging in integrating different applications from different Vendors. The paper will also outline how CAISO created CIM extensions for different market applications and network models used at CAISO.