| 摘要 |
<p>The present invention pertains to testing techniques and may be used in the research on the dielectric rigidity of a gaseous isolation in high-voltage equipment. This invention provides a method for performing the breakdown of a gaseous dielectric using a power supply with a reduced voltage. A corona discharge is generated by supplying an initial voltage to electrodes defining a discharge gap so as to create a three-dimensional load at the corona-producing electrode. The corona discharge is then redistributed along the discharge gap by lowering the intensity of said corona discharge. A voltage pulse base is then generated in the supply circuit and added to the initial voltage so as to ensure the complete breakdown of the gaseous dielectric. This method comprises lowering the intensity of the corona discharge and forming the pulse base using a dynamic secondary discharge device which is integrated to the supply circuit and has its electrodes switched from a closed state into an open one before being bridged by the electrical arc.</p> |
