RESEARCH OF CHANGES OF THE INSTABILITY OF PHASE FREQUENCY CHARACTERISTIC OF HIGH-VOLTAGE DIVIDER OF THE PRESSURE, CONNECTED WITH NON-IDENTITY ITS ELEMENTS

Abstract

On the basis of repeated measurements a real distribution of capacity values of condensers of a high-voltage shoulder of a potential divider is defined with the assumed deviation from the nominal, which is equal to ±5%. It is shown that the given distribution is asymmetric in the relation to rating value (22nF). The renormalization of the received distribution was done in the relation to the average capacity value of condensers. The influence of real distribution of condensers capacities on instability of the phase frequency characteristic (PFC) of a high-voltage potential divider is being researched. It is shown that the influence of the real distribution of condensers capacities with the deviation ±5% on instability of PFC of a divider is less expressed in the relation to the law of normal distribution with an average quadratic deviation, equal to ±5%. A deviation of condensers capacity of a high-voltage shoulder ±5% is proved to be acceptable. Usually the set deviation of capacities ±10% leads to unacceptably high instability of PFC of a high-voltage potential divider.