System and method for uninterruptible power-off loop-closing reverse supply of tie line with 30-degree angular difference

Through the intelligent combined ring operating system, the grid stability and power supply reliability problems when the 30-degree angle difference grid connection line combined rings are solved, and the combined ring operation without power outage is achieved, and the power supply service level is improved.

CN119695881AActive Publication Date: 2025-03-25STATE GRID HEBEI ELECTRIC POWER CO LTD BAODING POWER SUPPLY BRANCH CO +1
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Patent Information

Application Number
CN202411850409.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-16
Publication Date
2025-03-25
Estimated Expiration
2044-12-16

AI Technical Summary

Technical Problem

When the prior art deals with power grid connection lines with 30 degrees angle difference, the combined ring operation has problems such as large voltage angle fluctuations, equipment overload, and uncertain power outage, which is difficult to meet the requirements of grid stability and power supply reliability.

Method used

By setting up a system of automatic loop topology generation module, automatic operation parameter acquisition module, automatic ring current calculation module, internal ring protection fixed value verification module, and automatic ring value generation module, intelligent circular ring operation and current calculation are realized to ensure that the adjustment of the resolved ring protection fixed value is more suitable for engineering applications.

Benefits of technology

The 30-degree angle difference connection line has been realized without power outage, which has improved the reliability of user power supply, reduced the on-site operation workload of operation and maintenance personnel, avoided a large number of power outages, and significantly improved the power supply service level.

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Abstract

The invention discloses a system and a method for uninterrupted loop closing reverse supply of a tie line with 30-degree angular difference. The system comprises a loop topology automatic generation module, an operation parameter automatic acquisition module, a loop closing current automatic calculation module, an in-loop protection constant value checking module and a loop closing constant value automatic generation module. Through system configuration, loop closing operation is more intelligent, loop closing current calculation is more accurate and scientific, the actual operation condition of a power grid is completely met, and loop opening protection setting value setting is more suitable for engineering application; on the basis of the system, function cooperation and method application realize uninterrupted loop closing of the 30-degree angular difference tie line, so that the power supply reliability of a user is effectively improved, and the field operation workload of operation and maintenance personnel is reduced; according to the scheme, the power failure of more than 100 10kV lines and more than 500 thousands of users is avoided after the scheme is actually put into operation at the earlier stage, the user perception is avoided, the power failure work order voltage drop is effectively realized, and the power supply service level is greatly improved.
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