Review of research on current zero measurement of high-voltage SF6 circuit breakers
In order to design a set of high-precision,portable,reliable and highly secure current zero measurement system,which is crucially important for assessing breaking capacity of high voltage circuit breaker(HVCB)and improving HVCB's design,researchers from China and abroad have made many innovations in the development of measurement methods and measurement devices.Therefore,starting from the analysis of arc extinguishing principle of HVCB,this paper analyzes the difficulties and key points of current zero measurement systems,summarizes the measurement schemes proposed by domestic and foreign researchers and their effects.Considering the multi-dimensional needs from industry,a portable current zero measurement system with excellent dynamic characteristics was developed.This system has been validated through experiments on actual circuit breaker products.The results demonstrate that the system has good performance on anti-interference and repeatability and meets the needs of product development.Based on the research and usage experience of current zero measurement system,this paper forecasts the future prospect for current zero measurement system to give some reference for the research and development of AC/DC switches.
high voltage circuit breakercurrent zero measurmentarc voltagepost-arc currentvoltage dividerRogowski current coil
万方数据
