Zinc oxide valve plate breakdown point detection device and method based on image recognition

Abstract

The invention discloses a zinc oxide valve plate breakdown point detection device based on image recognition. The detection device comprises an image detection module, an image recognition module, a temperature detection module, a microprocessor module, a communication module and a rear platform; the image detection module comprises an infrared thermal imager, wherein the infrared thermal imager performs thermal imaging on a lightning arrester, and transmits a thermal imaging graph to the image recognition module; the temperature monitoring module monitors the temperature of a zinc oxide valveplate; and the image recognition module analyzes and identifies the received thermal imaging graph, identifies a temperature anomaly point on the basis of the monitored temperature data, and sends analarm signal to the rear platform. According to the device, the temperature anomaly point in the zinc oxide valve plate thermal imaging graph is identified through an image automatic identification technology, the breakdown point on the valve plate is judged, and the information is timely transmitted to the rear platform. The invention further discloses a zinc oxide valve plate breakdown point monitoring method based on image recognition. The method is high in detection timeliness and high in precision.

Description

technical field [0001] The invention belongs to the lightning protection technology of an electric power system, and in particular relates to a detection device and a detection method for a breakdown point of a zinc oxide valve plate based on image recognition. Background technique [0002] The metal oxide arrester is a power system overvoltage protection device developed in the late 1960s, and is widely used in high-voltage power systems. Its internal core is a zinc oxide valve, which has the characteristics of large flow energy and excellent nonlinear characteristics. normal operation of each device. [0003] The impact of transient overvoltage such as lightning overvoltage and operating overvoltage will cause the internal zinc oxide valve to fail. The failure mode can be divided into device short circuit and device open circuit. Among them, the main failure mode is device short circuit. The short circuit of the device is mainly due to the impact of long-term current, an...

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Problems solved by technology

However, there is a certain delay in this method. It may be that when the zinc oxide valve has deteriorated and failed, the monitored parameters have not changed significantly. Therefore, the timeliness of detection is poor.

Infrared temperature measurement technology has also been used in the inspection of lightning arresters in recent years. The operation status is judged by analyzing its different thermal image characteristics, but it is still necessary to observe the thermal image characteristics manually, which is prone to a certain degree of deviation and accuracy. Low; at the same time, the timeliness of regular inspections is poor, and problems cannot be found in the first place

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