Analysis and Discussion on the Current Situation of SF6 Relay Temperature Compensation Mode

The power industry requires regular inspection and meter reading of SF₆ gas density in circuit breakers, transformers or gas-insulated switches (GIS) filled with SF₆ gas. There is a deviation in the data copied by each operator. The general density meter has a temperature compensation device, but the current product only accurately compensates for the rated pressure value of the device, and the temperature compensation accuracy for other pressure values is poor. The technology involved in this paper is to transmit the density and temperature of SF₆ gas in the power equipment to the monitoring background in real time. According to the state equation between SF₆ gas temperature, pressure and density, the online value is dynamically compensated in real time on the software. In this paper, the key points of the technology are discussed in depth, which proves its feasibility and practicability. (paper)