29-01-2013, 11:13 AM
STATE LOAD DISPATCH CENTER AUTOMATION
STATE LOAD DISPATCH.doc (Size: 48 KB / Downloads: 22)
ABSTRACT
Economical growth in India has led to a considerable growth in its power sector. Issues related to system expansion, restructured environment, and changing regularity framework demand changes in planning and operating strategies and in the design of system architecture for future needs. We explore the role of interoperability or State Load Dispatch Center (SLDC) in the Indian power system context. Four levels of interoperability viz., organizational interoperability, application interoperability, information interoperability and technical interoperability are discussed with the help of typical scenarios. It is observed that interoperability among various systems of the power grid is crucial for achieving the benefits of open architecture based future control centers.
INTRODUCTION
Due to restructuring, owing to integration of multiple utilities in power systems and due to integration of power grids for power sharing, the number and the complexity of the functions that are to be performed by power control centers have increased. In order to keep up with the evolving requirements, the nation of the central supervisory control is being replaced by intelligent distributed control of the system. As pointed out by Conti, unidirectional centrally controlled nature of existing infrastructure can be upgraded into an interactive, electronically enhanced grid that can spot potential problems in real time, and automatically prevent or correct any faults or disturbances. Vender dependent non-standard legacy device with proprietary software and proprietary communication protocols are not interpretable. To achieve high level benefits by utilizing the powerfull features that modern information and communication technologies provides. Power systems of today need to focus interoperability.
This paper presents the status of interoperability at various levels of Indian power organizations. First the current architecture, known as Unified Load Dispatch And Communication (ULDC) driving the power system infrastructure, at various hierarchies is described. The barriers for interoperability in the ULDC architecture due to heterogeneous infrastructure, modification in the Inter Control Center Protocol (ICCP) standards by various venders, and lack of common standards are highlighted. These limitations can be addressed by using a model driven approach. In this case, common information model (CIM) which establishes a semantic understanding among the applications, leading to common standard for information representation and exchange is employed. This paper describes how the use of CIM decreases the need of large number of adapters which are the mean of application integration, thereby facilitating scalability.