Affiliations: Big Data Center of State Grid Corporation of China, Beijing, China
Correspondence:
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Corresponding author: Xiaolong Zhao, Big Data Center of State Grid Corporation of China, Beijing 100052, China. E-mail: dsjzx_fxxz@126.com.
Abstract: In addressing the challenges of scattered data and limited professional knowledge in traditional power data quality assessment and verification governance, our approach leveraged natural language processing (NLP) technology for text preprocessing, incorporating power system research findings and case analyses. Named entity recognition enhanced entity identification accuracy, while relationship weighting technology facilitated entity classification and relationship weight assignment. The resulting power system knowledge graph was seamlessly integrated into a graph database for real-time updates. Through the synergistic use of relationship weighting technology and graph convolutional networks (GCN), our method achieved precise representation and modeling of power system knowledge graphs. The research outcomes underscored the method’s exceptional performance in real-time anomaly detection, maintaining an anomaly detection rate between 1% and 10% and accuracy fluctuating from 80% to 98%. This method stands as a testament to its efficacy in processing power data and validating its robustness in power system assessment and verification.
Keywords: Knowledge graph, quality assessment, verification governance, power data, natural language processing, graph convolutional networks
