GB/T 37141.1-2022Guide to UV imaging detection of electrical equipments in high altitude regions—Part 1: Substations (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

This document is part 1 of GB/T 37141 "Guidelines for Ultraviolet Imaging Testing of Electrical Equipment in High Altitude Areas". GB/T 37141 has The following parts have been published.

--- Part 1: Substation;

--- Part 2: Transmission lines.

Introduction

This document is compiled based on the research results of discharge ultraviolet detection conducted by relevant units on the substation site and in the laboratory.

The methods and criteria presented in this document are derived from observed examples in field and laboratory tests. Taking into account the environmental parameters and instrument models, Due to differences in versions, different models and batches of ultraviolet imagers may not observe completely consistent discharge phenomena in the same environment.

Since substations and transmission lines are different in terms of equipment, defect types, and importance levels, etc., the detection strips for ultraviolet detection in substations There are some differences from transmission lines in terms of components, detection methods, defect classification and processing, and detection cycle.

GB/T 37141 is divided into two parts, including.

--- Part 1: Substation. The purpose is to provide high-altitude substation corona and arc ultraviolet imaging detection, defect evaluation, etc. method and basis.

--- Part 2: Transmission lines. The purpose is to provide corona and arc ultraviolet imaging detection and defect evaluation for transmission lines in high altitude areas Provide methods and basis.

1 Scope

This document provides the application of solar-blind ultraviolet imaging equipment to detect the corona of 1000V and above AC electrical equipment in substations (converter stations). And arc discharge detection conditions, detection methods, altitude correction of ultraviolet photon number, discharge type and cause judgment, defect classification and treatment, detection Measurement cycle and data management.

This document is applicable to the operation of 1000V and above AC electrical equipment in substations (converter stations) at an altitude of 1000m~5000m Detection of corona and arc discharge.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB 26860 Electrical Safety Work Regulations for Electric Parts of Power Plants and Substations

DL/T 345 Guidelines for the application of ultraviolet diagnostic technology for live equipment

DL/T 664 Application specification for infrared diagnosis of live equipment

3 Terms and Definitions

DL/T 345 and DL/T 664 defined and the following terms and definitions apply to this document.