Online Calibration Strategy for SF6 Gas Density Relay Based on Weighing Pressure Measurement

• DOI: 10.3390/electronics14061216
• Publication Date: 2025-03-20T09:03:59Z
• Authors: Wenjuan Dong; Xingang Wang; Yuwei Wang; Changao Ji; Chunwei Song
• Keywords: Gas pressure

SF6 gas has high electrical insulation strength and excellent arc-extinguishing properties, making it widely used in high-voltage equipment. However, leakage or liquefaction can reduce its performance, necessitating density monitoring. This paper presents an online calibration device based on balance pressure measurement outlines the process. It also analyzes impact of factors such as measuring balance, gravitational acceleration, cylinder friction, installation alignment accuracy. To address uncertainty stabilization time temperature, a simulation model was created to observe temperature equilibrium. Furthermore, power consumption analysis test conducted under different cycles. The experimental results confirm effectiveness this strategy.