A three-dimensional evaluation scheme for the application feasibility of a new type of gas insulating medium

Abstract

The invention relates to an online monitoring technology for the insulation state of gas-insulated medium electrical equipment, and specifically relates to a three-dimensional evaluation scheme for the application feasibility of a new type of gas-insulated medium. According to the conditions that need to be met in actual engineering applications, the insulation performance, physical and chemical properties of the new type of gas-insulated medium can be obtained. The evaluation direction of the three dimensions of performance and safety performance and the quantitative indicators under each dimension, assign weights and score each quantitative indicator, and finally obtain one or several better choices of SF6 substitute gas in each new gas insulation medium. This evaluation method solves the problem of repetitive work and wasteful work in the research of various gases due to the wide variety of potential gas insulating media and the many factors involved in actual use, which consume a lot of manpower and financial resources. The design is scientific and targeted. After comprehensive and rigorous calculation, the comprehensive score of each new gas insulation medium is obtained, and the most potential SF6 substitute gas is selected.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of the insulation state of gas-insulated medium electrical equipment, and in particular relates to a three-dimensional evaluation scheme for the application feasibility of a new type of gas-insulated medium. Background technique [0002] SF 6 Because of its good electrical performance, it is widely used in various electrical equipment including gas insulated transformers (Gas Insulated Transformer, GIT), gas insulated lines (Gas Insulated Line, GIL), etc., and SF 6 Gas-insulated equipment has the advantages of small footprint, safe and reliable operation, and long maintenance cycle. It is used in the field of medium and high voltage power transmission and transformation, and has gradually become the first choice for large and medium-sized urban substations. [0003] However SF 6 It is a gas with a strong greenhouse effect, and its greenhouse effect potential value GWP is CO 2 23,500 ...

AI Technical Summary

Problems solved by technology

[0004] At present, domestic and foreign 6 The research on alternative gases is in full swing. Researchers have conducted a lot of research on the physical and chemical properties of gases, the insulating properties of gases under different electric field types, breaking capacity, environmental friendliness, environmental adaptability, and economy. From the above One or several angles suggest potential alternatives to SF 6 However, most of these schemes focus on a single point, and the alternative gases in the proposed scheme cannot meet the performance requirements in many aspects

Moreover, the research is mostly from the perspective of the laboratory, which cannot accurately fit the operating conditions of the actual power equipment, which is more ideal

[0005] To understand several SFs recognized at this stage 6 The multi-angle comprehensive evaluation of potential alternative gases requires a lot of manpower and material resources, and due to the lack of a complete and multi-dimensional gas-insulating medium evaluation system, some scientific research work has become useless and repetitive work, and the industry continues to do so A set of evaluation system to accurately guide the scientific research work, and so far there is no such system in the industry

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