Defect analysis of the same batch of substation equipment based on big data analysis algorithm

Abstract

High-quality power equipment is the basis for ensuring the safe operation of the power grid and improving the reliability of power supply. In actual operation, although some electrical equipment can continue to be used, abnormal operation or hidden dangers will affect the safety of people, equipment and power grid, reliable and economic operation of power grid and equipment, equipment output or life span, and power quality. Therefore, research on multi-dimensional analysis of the same batch of substation equipment, and identification of suspected family defects and frequent defects is of great significance for improving the company’s equipment management and defect management. The maturity and promotion of unstructured text data mining, graph computing technology, and semantic analysis have provided a wider dimensional space for the analysis of power equipment defect data. Aiming at the shortcomings of traditional defect data analysis, this article summarizes and analyzes the defects and hidden dangers found in the equipment, traces the distribution status of the same equipment through the physical “ID”, carries out multi-dimensional analysis of the same batch of equipment, and investigates the hidden dangers of equipment family defects. A big data analysis algorithm to build automatic identification models of suspected familial defects and frequent defects in main substation equipment such as transformers, disconnectors, circuit breakers, and use graph computing technology to quickly integrate analysis capabilities in multi-source heterogeneous data fusion with hidden relationship discovery capabilities, identify equipment defects with potential impact relationships. From historical data, discover which manufacturers or purchased batches of equipment are more likely to have the same defect, and which defect types have a higher frequency, improve the recognition model of family defects and frequent defects, and improve the accuracy and comprehensiveness of defect recognition.

Fault diagnosis model of main equipment in substation based on multi-mode time-frequency combination

“…The diagnostic model proposed in this paper was used as the experimental group, and the fault diagnosis methods proposed in [1] and [2] were set to control A and B for comparative analysis. Abnormal data is recorded as 0 and normal data as 1.…”

“…Most of the existing fault diagnosis models for substation power transmission and transformation equipment only use local information, mainly based on equipment status monitoring and fault characteristic information from various physical and chemical tests. It is difficult to achieve an accurate diagnosis of complex faults [2]. Especially when multiple modes of data are required for fault diagnosis, the information fusion effect is poor [3].…”

Research and analysis on insulation tolerance level and MOV setting principles of electrical equipment in 1000kV substation

“…The rated lightning impulse withstand voltage of the 1000kV main transformer and the high-voltage parallel reactor on the outgoing line side is taken as 2250kV, and the rated lightning impulse withstand voltage of the incoming line CVT and GIS related equipment is taken as 2400kV. The insulation margin is 15%, and the allowable insulation voltages are 1956 kV and 2087 kV [8].…”