A dual-terminal power line protection adaptive method and system

Abstract

The invention discloses a self-adaptive method and system for protection of a double-ended power supply line, which comprises the following steps: detecting the line flow direction of the double-end power supply line in real time; judging whether the line flow direction changes; when the line flow direction changes , automatically switch the relay protection fixed value area. The self-adaptive method and system for double-ended power line protection provided by the embodiment of the present invention detects the direction of the power flow of the double-ended power line in real time. Switching the fixed value area of ​​relay protection realizes that the line protection can be self-adaptive when the double-terminal power line switches the power supply end, so as to reduce the operation risk of the power grid and improve the overall work efficiency.

Description

technical field [0001] The invention belongs to the technical field of relay protection, and in particular relates to an adaptive method and system for double-terminal power line protection. Background technique [0002] With the development of power grids and the formation of UHV large-capacity power grids, electricity has brought a huge impetus to national economic and social development, and has become one of the indispensable energy sources for social development and people's daily life. However, with the development of the times, the operation and management of the power grid have undergone profound changes. Experience at home and abroad shows that if the management of the power supply grid, especially the UHV grid, is not well managed, once natural or man-made faults occur, some users will be affected. Power outages will seriously threaten the safe operation of the power grid. To this end, power grid operators must do everything possible to improve the quality of powe...

AI Technical Summary

Problems solved by technology

[0004] The main disadvantage of the existing technology is that the operation requirements of the current power grid are getting higher and higher, and the switching of different power terminals of the double-ended power supply line is becoming more and more frequent. The relay protection setting value list and the operation personnel of the plant station go to the site to switch the protection setting value area, which greatly reduces the work efficiency and increases the operation risk of the power grid

Because in the current situation of manually switching areas, it is necessary to cut off the power of the line for a short time. During this period, if an accident occurs in the local power grid, it may increase the operation risk of the power grid.

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