Extra-high-voltage DC power transmission line live-line work safety evaluation method and system

Abstract

The invention discloses a safety evaluation method and system for live work of an extra-high voltage direct current transmission line. The calculation process has higher reliability, and the evaluation result can accurately reflect the comprehensive influence of all influencing factors on the evaluation result. The method includes: establishing a multi-level fuzzy comprehensive evaluation model of factor sets; stratifying each factor according to the subordination relationship between the factors in the factor set and constructing a weight set and a corresponding priority relationship matrix; establishing a fuzzy consistent unit according to the factor set Factor evaluation matrix; establish fuzzy comprehensive evaluation set according to factor set, weight set and single factor evaluation matrix; obtain multi-level fuzzy comprehensive evaluation results according to fuzzy comprehensive evaluation set.

Description

technical field [0001] The invention relates to the technical field of safety assessment for live work of UHV direct current transmission lines, in particular to a safety evaluation method and system for live work of UHV direct current transmission lines. Background technique [0002] UHV refers to the voltage level of ±800 kV and above direct current and 1000 kV and above alternating current. In the process of safety risk assessment, UHV power supply enterprises are faced with various operation methods. For example, substation operation, substation overhaul construction, power transmission operation, power transmission overhaul construction, power distribution operation, power distribution overhaul construction, dispatching communication automation, high-voltage oil service instrument operation, internal line and metering operation, vehicle traffic, etc. During the operation of each operation mode, many risk factors faced will cause personal injury or economic loss. Among...

AI Technical Summary

Problems solved by technology

However, on the one hand, the program requires a large amount of sample data, which requires high consistency and accuracy of the sample data, and it determines the risk factors by fuzzifying the risk factors in the input risk factor concentration The proportion in the evaluation set cannot reflect the actual physical meaning of each factor and the hierarchical relationship and relative importance between them. Therefore, it is difficult to use accurate weights to measure the relationship between multiple evaluation factors, and it is impossible Reflect the comprehensive impact of all influencing factors on the evaluation results

On the other hand, even if the weight distribution is determined, since the weights need to be normalized when the normalization requirements are met, the weight value of each factor will inevitably be small, so many factors will be drowned in the calculation. information, even sometimes difficult to draw any results

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