Insulative condition monitoring of high voltage circuit breaker

In order to improve power system reliability, high voltage circuit breaker(HVCB) as an important power equipment, the insulation state must be monitored reliably. In the paper, a design approach for real-time data acquisition and remote transmission system base on field programmable gate arrays(FPGA) and ARM technology is presented. The approach adopts an overall structure of FPGA+ARM + IPC and the system has all the functions of sampling, measurement and communication. It can monitor on-line temperature, insulation, electric and mechanical parameters of HVCB. The signal is analyzed and disposed, and the processed data is transported to remote IPC, thus all dates are recorded and information is shared. The important points of research focus on the monitoring and calculation of SF6 gas moisture and density in the paper. The presented device is excellent in the ability of real-timing and high reliability through an analysis of the test results.