Santiago-Cruz, Eduardo J.

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    Scada implementation of dynamic thermal circuit rating at georgia power
    (2013) Santiago-Cruz, Eduardo J.; Palomera-García, Rogelio; College of Engineering; Jiménez, Manuel; Aponte, Erick E.; Department of Electrical and Computer Engineering; Lorenzo, Edgardo
    This report describes a novel integration of Electric Power Research Institute’s (EPRI) Dynamic Thermal Circuit Rating (DTCR) to Supervisory Control And Data Acquisition (SCADA) networks. This integration was developed and implemented for Georgia Power’s 230KV Ashford substation and 115KV Jack McDonough substation. DTCR performs a variety of thermal rating calculations based on real-time or historical chronological files. These files contain electrical power flows, soil or weather conditions, and conductor temperature measurements. DTCR calculates real time conductor thermal capacity or ampacity and time to fail. DTCR ratings provide key information for maintenance and decision making that results in extended capacity of the equipment, improved reliability, and cost saving. A drawback with the DTCR application is its limited ability to interface with SCADA communication systems, which are used to convey information to operators and control centers. When DTCR was developed the technologies used for SCADA were not standardized and it was difficult to develop applications that could support multiple methods of communication. As a result, DTCR was designed to interface with a database which was not a viable communication option for Georgia Power. The current project developed and implemented a solution to this problem. All Georgia Power systems that were to be impacted by the implementation of DTCR were identified. With this information, a systematical assessment was applied to determine the best method of transferring data between DTCR and the SCADA network. The result was the development and implementation of a software which integrates the DTCR computer to the SCADA network. By using industry standard communication protocols the software developed in this work, called MSS, can seamlessly integrate to any SCADA substation network without the need to interface with databases. DTCR can now be installed locally in the substation, treated as any other Intelligent Electronic Device (IED) in the network and directly transfer the data to operators at a control center. It also eliminates the need to transfer large data files through the SCADA network that may be needed for calculations. The MSS software reduced cost by eliminating overhead required for the implementation. Finally, other utilities that have similar communication restrains as Georgia Power may be able to implement MSS since it was developed to meet the requirements of traditional SCADA schemes.