Converter station direct-current field security distance calculating method and system

Abstract

The embodiments of the present invention disclose a converter station direct-current field security distance calculating method and system. According to the prior art, commonly used methods are mainly adopted to perform cooperated calculation of the insulation of the live work of direct-current lines, or methods for determining the security distances of insulation gaps on the basis of live work hazard indexes are adopted, however, clear standards and provisions for the security distance calculation of various kinds of high-voltage electrified equipment in the direct-current field of a converter station are not provided, the invention aims to solve the above problems. According to the embodiments of the present invention, the method includes the following steps that: factors such as the sizes and shapes of electrodes in the direct-current field of the converter station, as well as position relations and gap types between electrified equipment are considered, and the relational expression of the gap distances of air gaps with discharge risks and the impact discharge voltages of the gaps is obtained; and certain margins are selected according to the operation impact calculation level of the equipment, and the security distances of the insulation air gaps under different security margins are calculated.

Description

Technical field [0001] The invention relates to the technical field of a converter station DC field, in particular to a method and system for calculating the safe distance of the converter station DC field. Background technique [0002] The DC field of a converter station refers to a special place where equipment such as busbars, lightning arresters, switches and reactors are placed in the converter station. The safe distance of the DC field means that there is no risk of discharge between the high-voltage live equipment and between the high-voltage live equipment and the staff. The distance between threat equipment and personal safety needs to be met. The safe distance in the DC field involves the construction cost of the converter station and the safety of the staff after it is put into operation. Therefore, the safe distance in the DC field is an important factor that must be considered in the early stage of the design of the converter station. The safety distance of the DC f...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method and system for calculating the safety distance of the DC field of the converter station, which solves the problem of using the common method in the prior art to calculate the insulation coordination of the live work of the DC line, or to determine the insulation gap based on the risk rate of the live work However, there is a lack of clear standards and technical problems in the calculation of the safety distance of various high-voltage live equipment in the DC field of the converter station.

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