Decision tree identification method based on sulfur hexafluoride partial discharge

Abstract

The invention discloses a decision tree identification method based on sulfur hexafluoride (SF6) partial discharge. The method includes a decision tree formation process as follows: S1, determining whether the training samples are empty, going to S2 if the training samples are empty, otherwise, going to S6; S2, determining whether there is only one category of samples in a node, going to S3 if there is more than one category of samples in the node, otherwise, going to S6; S3, determining whether the attribute A of the information gain ratio in the samples is continuous, going to S4 if the attribute A of the information gain ratio in the samples is not continuous, otherwise, going to S6; S4, finding the segmentation threshold of the attribute A; S5, growing a new node according to the attribute A, and returning to S1; S6, taking the new node as a leaf node, and naming the new node as a corresponding category; and S7, forming a decision tree. The beneficial effect achieved is that safe and reliable operation of SF6 devices is ensured, the ability to differentiate various defects is improved, and the efficiency of insulation fault processing is improved. The pattern of partial discharge acquired is identified by using the decision tree, and the identification rate of partial discharge is further improved.

Description

technical field [0001] The invention relates to the technical field of sulfur hexafluoride decomposition, in particular to a decision tree identification method based on partial discharge of sulfur hexafluoride gas. Background technique [0002] Sulfur hexafluoride (SF 6 ) gas is widely used in gas-insulated equipment due to its excellent insulation and arc extinguishing properties. However, SF 6 Gas insulated equipment (referred to as SF 6 Electrical equipment, such as gas-insulated combined electrical appliances (GIS, gas-insulated circuit breakers GCB, gas-insulated transformers GIT, and gas-insulated lines or pipelines GIL, etc.), will inevitably appear in the process of manufacturing, transportation, installation, maintenance and operation. A variety of insulation defects, such as metal burrs on the conductor, loose parts or poor contact, air gaps formed by the stripping of the conductor and the supporting insulator, remnants after overhaul, and metal particles in th...

AI Technical Summary

Problems solved by technology

However, SF 6 Gas insulated equipment (referred to as SF 6 Electrical equipment, such as gas-insulated combined electrical appliances (GIS, gas-insulated circuit breakers GCB, gas-insulated transformers GIT, and gas-insulated lines or pipelines GIL, etc.), will inevitably appear in the process of manufacturing, transportation, installation, maintenance and operation. A variety of insulation defects, such as metal burrs on the conductor, loose parts or poor contact, air gaps formed by the stripping of the conductor and the supporting insulator, remnants after overhaul, and metal particles in the cavity, etc., will cause SF 6 Different degrees of insulation defects are formed inside the equipment, which leads to distortion of the electric field inside the equipment, and then produces partial discharge (PD)

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