Accurate method of representation of high-voltage measuring systems and its application in high-impulse-voltage measurements

摘要

A method of simulation is presented which will enable computations on high-impulse-voltage measuring systems to be carried out. For a given excitation, the response of the system as well as the response time parameters can be calculated. The measuring system is represented by a chain of distributed and concentrated elements, each one simulated by a quadripole. For a given input voltage, the voltage at the output of the system can be evaluated by a step-by-step computation at each quadripole, moving from the input towards the output. The input voltage is given either by its analytical expression or by its digital form recorded by means of a fast A/D convertor (transient digitiser). Given the output signal, as it has been distorted by the measuring system, it is possible to calculate the true input voltage by a deconvolution procedure based on the same method of simulation. The comparative measurements which were carried out proved that the calculated values of the response characteristics lie very closely to the measured ones. The proposed simulation method can be used for computer-aided design of high-voltage measuring systems and for the correction of errors introduced by these systems.