Fault diagnosis method for overhead line system disconnecting switch

Abstract

The invention discloses a fault diagnosis method for an overhead line system disconnecting switch. An optical fiber temperature sensor, an optical fiber angle sensor, a torque sensor, a vibration sensor, a current sensor and an acceleration sensor are adopted to simultaneously acquire fault characteristic attribute values of an isolation switch under different fault types. Collected values are transmitted to an analog quantity collector to be processed. The analog quantity collector transmits the processed information to the PC through a twisted pair in an RS485 communication mode. An isolation switch fault diagnosis model based on a probabilistic neural network is established in a PC. The fault diagnosis model is established only by inputting the fault features corresponding to the different fault types of the contact network isolation switch into the probabilistic neural network, the different fault types can be identified, and the final diagnosis result is displayed on the upper computer, so that a worker can visually check the fault types of the corresponding isolation switch.

Description

technical field [0001] The invention relates to the field of fault diagnosis, in particular to a method for fault diagnosis of a catenary isolating switch. Background technique [0002] The isolating switch is the most widely used electrical equipment in substations, which can perform no-load switching operations on the circuit system to form an isolation disconnection point. The action is mainly completed by the electrical control part and the mechanical transmission part. However, due to the long-term exposure of the equipment to the outdoor environment, the corrosion and wear of the mechanism are relatively large, which accounts for a large proportion of the daily maintenance work of the substation. Most of the isolating switchgear in substations is an outdoor open structure, and the working environment is harsh, which leads to problems such as poor lubrication, rust jamming, and serious wear of various parts of the mechanical transmission part. Incomplete head contact w...

AI Technical Summary

Problems solved by technology

These commonly used isolating switch fault diagnosis methods are relatively scattered, and there is no unified planning together, which makes the diagnosis of isolating switch faults relatively simple, resulting in the staff being unable to accurately determine the type of isolating switch failure.

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