组合式有源电子传感器测量回路供电方式的研究

组合式有源电子传感器基于Rogowski线圈和电容分压原理测量母线电流和电压,供能的质量直接决定着传感器的测量精度.为了使所设计的组合式传感器达到较高的测量精度,在分析比较了多种测量电路供电方式的基础上,提出了一种全新的高压侧供能方案,即采用柱状电容环和双电层电容器的组合式供能方案.通过测试,新方案在提供长时间备用电源的同时,消除了传统供能方法中存在的供电死区问题,为高压侧电路板的正常工作提供了保证.

Study on the power supply of the new type of combined electronic transducers in measure loop

Combined electronic transducer keeps the principle of Rogowsk coil and capacitor potentiometer to measure the bus current and voltage.And the problem of power supply for the PCB is pivotal for the measure precision of the electronic transducers.Based on the comparison of some power supply design of measuring circuit of HV side,a new type design,which is combined design of column capacitor ring and capacitor of electric double layer(EDLC),is put forward in this paper.The test result shows the new design not only supplies a long spare power supply,but also avoids the dead-time of power supply in traditional design,and provides a guarantee for the right running of measuring circuit of HV side.