Operation Condition Assessment Method and its Practical Implementation for Protection Systems

A well-monitored and reasonable-assessed protection system can lead to the improved operation and reliability of power systems. In this paper, a systematic and efficient operation condition assessment (OCA) method and its practical implementation for protection systems are proposed. Considering the device configuration and information transmission scheme, a protection system operation condition model (PSOCM) is developed. Based on the PSOCM, an OCA method is designed to assess the statuses of devices, information flows, information transmission branches, and relay functions. To verify the effectiveness of the proposed method, a master-substation operation condition assessment system (MS-OCAS), which utilizes real-time monitoring and other raw data, is demonstrated. As shown by the experimental results for a 110 kV IEC 61850-based substation, the proposed method, and system can realize the whole-view OCA of protection systems and can dramatically increase the maintenance efficiency.

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