Construction method of resistance reduction and grounding device of transformer station

Abstract

The invention, which belongs to the technical field of the electrical power engineering, particularly relates to a construction method of a resistance reduction and grounding device of a transformer station. The method comprises: a surveyor measures a soil resistivity, a frozen soil depth, and a soil layering situation in a site area of a transformer station to obtain surveying data; a soil model is established according to the surveying data; on the basis of the soil model, a grounding device inside the station is designed in the site area of the transformer station; safety verification is carried out on the grounding device designed at the last step so as to obtain a verification result; if the verification result meets the requirement, a next step is executed; if the verification result does not meet the requirement, a grounding device is arranged externally outside the site area of the transformer station and safety verification is carried out; the verification result is stored; a construction drawing is drawn; and construction is carried out by organizing people. Under the circumstances that no extra collected land is increased, the construction method of the resistance reduction and grounding device of the transformer station is provided. The construction method has characteristics of obvious resistance reduction effect, simple structure, convenient construction, and low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of electric power engineering, and in particular relates to a construction method for a resistance-reducing grounding device of a substation. Background technique [0002] With the rapid development of my country's economy, the electric power industry has entered a period of rapid development, and the rapid economic development has also brought about an extreme shortage of land resources. The large-scale promotion of GIS or HGIS power distribution devices has further reduced the site area of ​​substations. The combination of the two causes the problem of excessive grounding resistance in substations (the specified grounding resistance is ≤0.5Ω), and high grounding resistance is likely to cause injury to substation operators and equipment. damage. Therefore, reducing the grounding resistance is an important guarantee to ensure the safety of substation personnel and equipment. [0003] At present, the mainstre...

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Problems solved by technology

The grounding grid of the substation is an important measure to maintain the safe and reliable operation of the power system and ensure the safety of the staff. However, power system accidents caused by grounding faults have occurred in my country for many years, and the direct economic losses caused by each accident are few to few. If it is more than 100,000 yuan, it can be tens of millions of yuan, and the indirect economic loss caused by the resulting power outage is even greater. Therefore, a complete set of strict construction procedures and methods are required for the resistance reduction and grounding measures.

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