Transformer station ground current inhibition device and inhibition method

Abstract

The invention discloses a transformer station ground current inhibition device and an inhibition method. The device comprises a grounding net of a main transformer of a transformer station and a grounding net of other devices of the transformer station. The grounding net of the main transformer of the transformer station is in electric isolation with the grounding net of other devices of the transformer station. The grounding net of the main transformer of the transformer station comprises several grounding wells and grounding bodies. The grounding bodies are arranged in the grounding wells. The grounding bodies are connected with the neutral point of the main transformer inside the transformer station. A mode that a neutral point grounding net is buried in a well is employed, thus a ground current in a power grid is guided to the underground deep rapidly, further diffusion of the ground current is inhibited, and therefore safety of the power grid is ensured.

Description

technical field The invention belongs to the field of substations, in particular to a substation current suppression device and a suppression method thereof. Background technique In recent years, with the development of UHV power grid technology in China, the concept of power Internet and smart grid proposed by State Grid has gradually become the consensus of the world. The future power grid is expected to become a hybrid type with UHV AC and DC transmission lines as the backbone. super grid. In fact, recently, the large-scale power grids in North China, East China, and Central China connected by UHV lines as the backbone have begun to take shape, and the security of power grids is more important than ever. With the expansion of the grid scale, the problems of grid unbalanced current, solar magnetic storm and geomagnetic induced current (GIC) become more and more prominent, and unbalanced current and geomagnetic induced current will spread widely on the grid. If correspon...

AI Technical Summary

Problems solved by technology

To sum up, the problems existing in the existing grounding system are: the neutral point grounding point of the high-voltage side and the low-voltage side of the transformer cannot be completely separated, and the grounding effect is poor, resulting in unbalanced current in the power grid, solar magnetic storm and geomagnetic induction current ( The problem of GIC) has become more and more prominent, making unbalanced currents and geomagnetically induced currents spread on a large scale on the power grid

Images