Electrical power system transient overvoltage acquisition system

Abstract

The invention discloses an electrical power system transient overvoltage acquisition system. The system comprises a condenser bushing, a voltage transducer, a secondary resistance-capacitance divider, a transducer, an amplifier and a correcting circuit, wherein the condenser bushing, the voltage transducer, the secondary resistance-capacitance divider, the transducer, the amplifier and a liquid crystal display screen are sequentially connected, the correcting circuit is in output connection with the secondary resistance-capacitance divider, a voltage signal which is output by the voltage transducer is transmitted to the secondary resistance-capacitance divider, the correcting circuit comprises a voltage doubling circuit and a waveform adjusting circuit, correction of the system can be achieved, the system reliability is improved, a voltage dividing system is a condenser bushing end screen voltage dividing system, the frequency response characteristic is good, errors caused when measurement of impulse voltage is performed can be greatly reduced, and real-time acquisition and monitoring of internal and external overvoltage can be achieved.

Description

technical field [0001] The invention relates to the field of power system safety research, in particular to a power system transient overvoltage acquisition system. Background technique [0002] Power system overvoltage has a significant impact on the insulation of electrical equipment in power plants and substations and the insulation of lines. How to reasonably determine the necessary insulation level of equipment, so as to reduce the cost of equipment, maintenance costs and accident losses caused by equipment insulation failure, makes research and monitoring of overvoltage necessary. [0003] The existing overvoltage monitoring and acquisition equipment does not have a calibration device, and it is not known whether it can work normally. The existing sampling system or voltage dividing system generally uses voltage transformers. When voltage transformers respond to impulse voltage signals, especially lightning impulses, they respond It is not sensitive enough, and there ...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a transient overvoltage acquisition system of a power system, which solves the problem that the existing overvoltage monitoring and acquisition equipment has no calibration device and cannot judge whether it can work normally, and the response of the voltage transformer is not enough when responding to the impulse voltage signal Sensitive, there is a technical problem of certain errors, and the system can be calibrated to improve system reliability. The voltage dividing system is a capacitive bushing end screen voltage dividing system with good frequency response characteristics, which can greatly reduce the noise generated when measuring the impulse voltage. error, the technical effect of being able to collect and monitor internal and external overvoltages in real time

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