High-voltage lightning arrester defect diagnosis method and voltage allocation measurement device

Abstract

The invention discloses a high-voltage lightning arrester defect diagnosis method. The high-voltage lightning arrester defect diagnosis method comprises the steps that 01, various small umbrella skirts in a lightning arrester are taken as measurement points, and the field intensity of each measurement point is acquired; 02, the potential of each measurement point is obtained according to the fieldintensity at the measurement point in the step 01, and then potential distribution of each lightning arrester body is obtained; and 3, the internal insulation condition of the equipment is diagnosedaccording to the potential distribution condition of each lightning arrester body. The invention further discloses a high-voltage lightning arrester voltage allocation measurement device. The high-voltage lightning arrester voltage allocation measurement device comprises a control unit, a field intensity detection unit and an insulating rod; the field intensity detection unit is fixedly installedat the tail end of the insulating rod and used for measuring the field intensity of each small umbrella skirts in the lightning arrester; and the control unit is in signal connection with the field intensity detection unit and used for achieving voltage allocation of the lightning arrester according to the field intensities at the various small umbrella skirts. The method and the device both havethe advantages of being easy and convenient to operate, precise in detection, secure, reliable and the like.

Description

technical field [0001] The invention mainly relates to the technical field of lightning arresters, in particular to a defect diagnosis method and a voltage distribution measuring device of a high-voltage lightning arrester. Background technique [0002] The surge arrester equipment in the power system may have defects such as aging or damp during long-term live operation. In order to monitor the operating status of the arrester in time and find early defects, it is necessary to conduct live detection regularly. The existing live detection methods mainly include: leakage current detection under the operating state of the arrester , Infrared thermal imaging detection, ultraviolet discharge detection and high frequency partial discharge detection. Among them, the measurement of the potential distribution on the surface of the arrester during the operation of the substation has not yet been carried out. There are two main difficulties: 1) The voltage of the high-voltage electric...

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Problems solved by technology

Among them, the measurement of the potential distribution on the surface of the arrester during the operation of the substation has not yet been carried out. There are two main difficulties: 1) The voltage of the high-voltage electrical equipment cannot be directly measured, and the measurement of the high potential is usually through a voltage divider to measure the secondary side of the voltage divider. Voltage, and then converted to get the voltage to be measured, and it is not feasible to use the voltage divider to directly connect the lightning arrester in parallel operation; 2) If the electrical signal probe is used to obtain the signal on the surface of the porcelain bottle, the high voltage potential on the surface of the lightning arrester will be introduced into the measuring instrument, Cause high voltage damage to the instrument

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