A non-excavation detection method suitable for grounding grids in oilfield tank farms

Abstract

The invention discloses a non-excavation detection method suitable for grounding grids in oil field tank farms, and belongs to the technical field of power system safety diagnosis. The technical solution is: a non-excavation detection method suitable for the grounding grid of the oilfield tank farm. The detection method is: draw a topological structure diagram according to the construction drawing of the tank farm grounding number, generate an associated node matrix, measure the resistance of the auxiliary wire, contact resistance, and port resistance in sequence, and the corrosion fault detection program uses the measured resistance of the auxiliary wire, contact resistance, and port resistance to calculate and obtain the corrosion detection result. The beneficial effects of the present invention are: the present invention can avoid blind excavation, the numbering method of nodes and branches is simple and can improve the diagnostic accuracy, reduce the time-consuming detection, shorten the length of the measuring wire, and reduce the impact of contact resistance on the inverse calculation of branch resistance. The impact of errors greatly improves the diagnostic accuracy.

Description

Technical field [0001] The present invention relates to the field of safety diagnosis technology, and Background technique [0002] The tank area is the main channel of the ventilation and thunder. It is the basic measures to ensure the lightning protection safety of the tank area. If the grounding network has a more severe rust-resist, the ground resistance is high, the ground potential distribution is uneven, the lightning current or lightning electrostatic induction is charged in the ground speed, and a spark discharge or high potential counterattack between the metal attachments of the storage tank. The ignition detonation of oil and gas, causing major safety accidents and losses. At present, the method for the detection of grounding network corroding fault detection is mainly divided into two types of excavation detection and non-excavation, wherein the method of grounding corroding fault detection in the tank area is usually broken, and the method cannot accurately determin...

AI Technical Summary

Problems solved by technology

[0005] 1) The nodes and branches cannot be numbered, and parameters such as the associated node matrix cannot be obtained, so that the inverse operation of the branch resistance cannot be performed

[0006] 2) You cannot directly get the final result with one input

For each measurement port, the two ends of the port with the largest resistance increase multiple of the previous diagnosis result are selected for measurement, so the steps of measurement→calculation need to be repeated, which is very time-consuming

[0007] 3) The measurement ports are usually far apart, so the length of the measurement wire is very high, and the field wiring is lengthy and time-consuming

[0008] 4) Since the contact resistance is usually tens of milliohms, and the grounding grid of the tank area is usually not large, and the port resistance is also tens of milliohms, the error caused by it is very influential, resulting in the result of the inverse calculation of the branch resistance being much larger than the actual value

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