Comprehensive operation state evaluation simulation system of capacitor voltage transformer

Abstract

The invention discloses a comprehensive operation state evaluation simulation system of a capacitor voltage transformer. The method comprises steps that: by establishing a CVT circuit model and a corresponding relation between an insulation parameter and each environmental parameter, the simulation error of the CVT under different environmental parameters is acquired, error data is recorded and stored, and is compared with the data measured by a on-site CVT error on-line monitoring device, and then a CVT error state is evaluated. According to the invention, influences of internal and externalinsulation factors on a CVT metering state in the actual operation of the CVT are considered, the comprehensive operation state evaluation simulation model of the capacitor voltage transformer is established, and influence rules of factors such as environmental temperature, secondary load, power supply frequency, external pollution and the like on the CVT metering performance can be acquired through simulation analysis, and a theoretical and practical basis for improving the operation stability of the CVT can be provided.

Description

technical field [0001] The invention belongs to the technical field of CVT test equipment, and relates to a method for evaluating and simulating a comprehensive operating state of a capacitive voltage transformer. Background technique [0002] Capacitor Voltage Transformer (CVT) is an important metering and protection device in the power system, and its safe and stable operation is directly related to the stability of power grid operation and the accuracy of electric energy metering. Compared with the traditional electromagnetic voltage transformer (Potential Transformer, PT), the CVT capacitive voltage divider unit can also be used for line carrier communication, and will not cause parameter resonance caused by matching with the capacitive components of the power system. In addition, under the same circumstances, the cost of CVT is much lower than that of PT, and it is easy to maintain and realize live detection. Because of this, CVT is widely used in the lines and busbars...

AI Technical Summary

Problems solved by technology

[0004] At present, the simulation model for studying CVT is based on the standard model under ideal conditions, which fails to consider the influence of all its own factors (internal insulation) and external factors (external insulation) in the operating state on the CVT. Therefore, the simulation results of the model are not consistent with the actual There are some differences in the running results, and there are errors

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