Sensor deployment method suitable for partial discharge monitoring of switch cabinet

Abstract

The invention discloses a sensor deployment method suitable for partial discharge monitoring of a switch cabinet, and the method comprises the steps: calculating the propagation characteristics of partial discharge electromagnetic signals in the switch cabinet based on a Maxwell differential equation; establishing a switch cabinet simulation model according to the structure and material parameters of the switch cabinet, and performing simulation analysis on the distribution of the electric field intensity in the switch cabinet and the influence factors of the TEV distributed sensor signal amplitude through the switch cabinet simulation model; setting deployment points of the partial discharge sources and the TEV distributed sensors according to simulation analysis results, comparing partial discharge source voltage amplitudes and variances of the deployment points under the same partial discharge sources, and determining deployment positions of the TEV distributed sensors; accurate modeling is carried out according to the structure size and material parameters of a certain type of switch cabinet, the deployment position of the switch cabinet partial discharge sensor is determined through simulation calculation and experimental verification, monitoring of switch cabinet partial discharge is achieved on the basis that the cost is guaranteed as much as possible, and the method has very high application value.

Description

technical field [0001] The present invention relates to the technical field of sensor deployment, in particular to a sensor deployment method suitable for partial discharge monitoring of switch cabinets. Background technique [0002] In the long-term operation of the switchgear, due to various reasons, the cable lap fault, busbar fault, outgoing fault, operating mechanism fault, and lightning arrester fault light occur during the installation and operation of the switchgear, thus contributing to the reliable operation of the power grid. It brings hidden dangers and directly affects the safe and stable operation of the equipment. [0003] When partial discharge occurs in high-voltage electrical equipment, the discharge often first gathers in the grounded metal part adjacent to the grounding point, forming a ground current that spreads on the metal surface of the equipment. For internal discharge, the discharge amount is concentrated on the inner surface of the grounding shie...

AI Technical Summary

Problems solved by technology

[0004] At present, the main application method of ground electric wave (TEV) partial discharge detection method is regular live inspection, which will not only consume a lot of manpower and material resources, but also lead to missed judgments and misjudgments due to the lack of detection personnel level and experience

At the same time, due to the in-depth research on the location and severity of partial discharge inside the switchgear, there is no practical plan for the deployment location of distributed sensor nodes.

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