Method for reducing induced voltage of overhead ground wire suitable for direct-current and alternating-current lines

By obtaining the information of the circuit to be melted and setting the status and component parameters of the suppression loop, the suppression loop is put into the ground insulation and U-shaped connection, which solves the problem of excessive induced voltage during the DC melting of the overhead ground line without power outage, and adaptability to different voltage levels and melting section lengths is achieved, improving the efficiency and safety of melting ice.

CN119742703APending Publication Date: 2025-04-01SOUTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP CORP
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Patent Information

Application Number
CN202411918568.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-04-01

AI Technical Summary

Technical Problem

The prior art has a high induced voltage during the DC melting process of overhead ground lines, resulting in failure of melting ice. The induced voltage suppression methods for different voltage levels and melting ice lengths are different, and the operation is complicated.

Method used

A method is adopted to reduce the induced voltage by overhead ground lines suitable for DC and AC lines. By obtaining the information of the ice to be melted, setting the status and component parameters of the suppression loop, inputting the suppression loop for ground insulation and U-shaped connection, calculating the time required for melting ice, connecting it to the DC ice melting power supply, and starting to melt ice.

Benefits of technology

It effectively reduces the induction voltage of the overhead ground line, simplifies operation, and can be applied to projects with different voltage levels and melting section lengths at the same time, improving melting efficiency and safety.

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Abstract

The invention discloses a method for reducing induced voltage of an overhead ground wire suitable for direct-current and alternating-current lines, which relates to the field of high-voltage transmission lines and comprises the following steps of: S1, acquiring data of a line to be de-iced; s2, setting the state of a relay in a suppression loop and parameters of each element according to the ice melting line data; s3, a suppression loop is put into use, the whole ground wires are insulated to the ground, and the two ground wires are connected in a U-shaped mode; and S4, calculating the time required for ice melting, connecting a direct-current ice melting power supply, and starting ice melting. The problem that direct-current ice melting is affected due to the fact that the induction voltage of an existing to-be-melted overhead ground wire is too high is solved.
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