Power station grounding grid

Abstract

The invention discloses a power station grounding grid and belongs to the electric field. The power station grounding grid includes a grid-side grounding grid and a power station-side grounding grid; the grid-side grounding grid is electrically connected with the grounding point of the neutral point of a step-up main transformer; the grid-side grounding grid is electrically connected with the grounding point of first equipment; the first equipment includes equipment directly connected with a power grid; the power station-side grounding grid is electrically connected with the grounding point of second equipment; the second equipment includes equipment of which the working power source is supplied by a power station; and no electrical connection exists between the grid-side grounding grid and the power station-side grounding grid. With the power station grounding grid adopted, harm to the step-up main transformer of the power station caused by ground current can be reduced, and the security of the power grid and the power station can be improved.

Description

technical field [0001] The present disclosure relates to the electrical field, in particular to a grounding grid of a power station. Background technique [0002] Ground currents are ubiquitous in power grids, such as unbalanced neutral point currents of step-up main transformers, geomagnetic induction currents, and ground currents generated under other circumstances, and ground currents pose a great safety hazard to power stations and power station workers Hidden danger. Therefore, in order to reduce the potential safety hazards caused by the ground current to the power station and the staff of the power station, it is necessary to discharge the ground current. [0003] At present, the ground current leakage is realized by the following method: each power station includes a grounding grid, which has the ability to conduct electricity, and can inject the current connected to the grounding grid into the earth. The grounding point of the neutral point, the grounding point of...

AI Technical Summary

Problems solved by technology

[0005] Due to the different composition materials of the grounding grids of each power station, the grounding effect of the grounding grids of each power station is also different, which leads to more ground current leakage through the grounding grid of the power station with better grounding effect

At this time, the ground current on the power grid will flow through the main transformer winding of the power station with better grounding effect through the overhead line, causing the DC bias of the main transformer and increasing the noise. Long-term operation will affect the insulation of the transformer winding. Wear accidents, which in turn lead to greater safety hazards in the power station with better grounding effect

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