摘要
环形耦合电容器作为拾取局部放电信号和工频信号的传感器,它的设计是否合理直接决定了采集得到的局放信号的质量。通过已知数据,在忽略环形电容极板和母线封闭外壳的厚度的情况下,计算出电容极板的电容值。再通过耦合电容的等值电路得到耦合电容输出电压与输入电压之比,然后列出耦合信号输出输入电压的比值表。通过对表中数据进行分析得出所设计的环形耦合电容器是否可以去掉大部分噪声,达到我们对环形耦合电容的设计要求。
The annular coupling capacitor is a sensor that picks up partial discharge signals and working frequency sig- nal, whose design is reasonable or not to directly determine the quality of collecting the partial discharge signals and working frequency signals. By known data, and ignoring the thickness of the annular capacitor plate and the closed shell of the bus bar, we calculated the capacitance of the capacitor plates. Then we obtain the ratio of the coupling capacitor output voltage and the input voltage by the equivalent circuit of the coupling capacitor, which helps us to create a ratio table of the coupling capacitor output voltage and the input voltage. In we find whether the annular coupling capacitor can get rid of the most the end, though analyzing the data in the table, of the noise to achieve our design requirements.
出处
《电气开关》
2013年第1期52-53,58,共3页
Electric Switchgear
关键词
电容
耦合
信号
capacitance
coupling
signal
