High-voltage Pulse Capacitor Storage Performance

The high voltage pulse capacitor is the key part of one high voltage apparatus. Compared with the other part of the apparatus, the parameters of high voltage pulse capacitor vary sharply in the long storage time. So this high voltage apparatus reliability rests on the performance of the high voltage pulse capacitor greatly. Thus it's important to do some research on the stability of high voltage pulse capacitor.The chief aim of present work is to investigate the long storage feature of high voltage pulse capacitor. Based on the long-term storage experiment data, several conclusions are made by the author. The relationships between the parameters of high voltage pulse capacitor and different environment are analyzed by using the grey system model. In addition, the long-term storage parameter of high voltage pulse capacitor are predicted by using basic GM(1,1) ]'model. Compared with the actual value, it's indicated that the constructed model is of good precision and the grey system theory is simple and practical for engineering application.The experiment being made by our research group is aimed at obtaining the result of insulation status by long-term storage and stepped-aging. The method used in our study is known as measuring electric current and partial discharge under the high voltage of direct current. The results of the experiment indicate that long-term storage and stepped-aging deteriorate the capacitor's insulation. However, several capacitors which are stored for more than 10 years could work correctly under rating voltage. These results provide the valuable approach and technology experience for confirming the storage life of the high voltage pulse capacitor. In addition, the partial discharge feature of testing is extracted in accordance with statistical theory, which is processed and recognized by Matlab and other statistical software. At the same time, the primary test effects are introduced.