局部放电选频平衡法中选频放大器性能对测量的影响[J]. High voltageapparatus, 1998, (4): 28-32.DOI:
局部放电选频平衡法中选频放大器性能对测量的影响
摘要
讨论了选频放大器的通频带宽度对测量灵敏度和干扰抑制比的影响
以及试样与参考电容器的电容量之比对干扰抑制性能的影响。最后给出了在实际电路上的测量结果。
Abstract
The input circuits of selective frequency balance method is inductance and capacitance. There is zero point at certain frequency point of the trasmis-sion function of interference signal. So the selective frequency amplifer must be used in the partial discharge (PD) measurement. In this paper
the effects of the band width of selective frequency and amplifier on interference rejection ratio and measurement sensitivity are discussed ;and also the effects of the capacity ratio of sample capacitor and reference capacitor. At last
the measurement results are given in real HV cicuit.