Lightning stroke detection device of lightning protection facility

Abstract

The invention provides a lightning stroke detection device of a lightning protection facility. The lightning stroke detection device comprises a detection module which is arranged on the lightning protection facility and used for detecting lightning stroke current, and an energy obtaining module arranged on the lightning protection facility, wherein the detection module is coupled with a current sensor arranged on the lightning protection facility, a voltage limiting protection unit I electrically connected with the current sensor, a peak holding circuit electrically connected with the pressure limiting voltage limiting protection unit I, a control circuit electrically connected with the peak holding circuit, and a clock circuit electrically connected with the control circuit; the energy obtaining module provides working power for the control circuit, and comprises an energy obtaining coil arranged on the lightning protection facility in a coupling manner, and an energy obtaining processing circuit electrically connected with the energy obtaining coil; and an output end of the energy obtaining processing circuit is electrically connected with the control circuit. The lightning stroke detection device can accurately detect the parameter characteristic of the lightning stroke current in real time, so that the accuracy is high; the lightning stroke current can be detected without external power supply, so that the reliability is high; and the lightning stroke detection device is completely isolated from a primary side of a power grid, so that the lightning stroke detection device has good safety characteristic.

Description

technical field [0001] The invention relates to a detection device, in particular to a lightning strike detection device for lightning protection facilities. Background technique [0002] With the development of the national economy, the voltage level and scale of the power system develop and expand rapidly. Therefore, the overhead transmission lines of the power system are widely distributed and are easily attacked by lightning. Substations and buildings are often attacked by lightning. Due to the randomness and shortness of occurrence, it is particularly important to accurately locate the time and parameter characteristics of lightning current occurrence. The parameter characteristics of lightning current are of great significance for lightning protection countermeasures, improving the performance of lightning protection facilities, evaluating the protection range of lightning protection facilities for various equipment, substations and buildings, and analyzing lightning a...

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Problems solved by technology

The traditional method is to install magnetic steel rods on the lightning protection facilities, and use the magnetic field generated by the lightning current to magnetize the magnetic steel rods. Since the magnetic steel rods have strong magnetic correction characteristics, the lightning current can still be retained after passing through the magnetic steel rods. Larger remanence, by detecting the size of the remanence to determine the magnitude of the measured lightning current amplitude, the advantage of this method is that it is low in cost and easy to install in large quantities, and can meet the characteristics of randomness of lightning current, but the disadvantage is that the magnetic The formula of the steel rod and the dispersion of the production process, and the residual magnetism of the magnetic steel rod is also greatly affected by the environment, resulting in a low measurement accuracy, and this method can only record the magnitude of the latest lightning strike current at the time of collection , the data before the latest lightning strike cannot be collected, it is difficult to obtain data, and the workload is also very huge

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