Oil field tank field grounding grid fault detection device
A technology of fault detection and grounding grid, which is applied in the direction of fault location and fault detection according to conductor type, etc., can solve the problems of inability to obtain diagnostic results, increase inaccuracy of results, and large error of detection results, etc., and achieve light measurement equipment and reduce measurement Difficulty and effect of measurement time, wiring and operator ease
Active Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0004] ①It will take a lot of time to input directly
Moreover, the input process is complicated, and errors caused by input will not be able to obtain correct diagnosis results
[0005] ②The length of the test line is usually 10-20 meters, which is equivalent to the length of the grounding down-conductor, resulting in a very large error in the test result due to the resistance of the test lead itself, which increases the inaccuracy of the result
[0006] ③Because the contact resistance is usually tens of milliohms, and the grounding grid of the oilfield 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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[0100] Step S1: Draw a topological structure diagram according to the construction drawing of the grounding grid in the tank area, in which the topological structure diagram uses the grounding grid downconductor as the node, and the node connection line connecting the two phases as the branch, and finally forms a number of circles and adjacent The topological structure diagram formed by the connection line between two circles;
[0101] Step S2: Combining with the topological structure diagram, use the method of numbering the branches and nodes of the grounding network of the tank area to number the nodes 1, 2, 3, 4 and the branches 1, 2, 3, 4;
[0102] Step S3: Generate an associated node matrix according to the node number and the branch number;
[0103] Step S4: According to the topological structure diagram, use two 10m-long auxiliary wires to electrically connect the branches between the two nodes; then, use a digital DC bridge to measure the resistance of the auxiliary wi...
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The invention discloses an oil field tank field grounding grid fault detection device, and belongs to the technical field of power system safety diagnosis devices. According to the technical scheme, the oil field tank field grounding grid fault detection device comprises a measurement module, a data processing unit, a man-machine interaction module and a power supply unit, wherein the data processing unit is used for receiving input information of the man-machine interaction unit, receiving the measurement information of the measurement unit, converting the measurement information of the measurement unit into a measurement result, outputting the measurement result to the man-machine interaction module, calculating a corrosion fault result by utilizing the received input information and measurement information, and outputting the calculated corrosion fault result to the man-machine interaction module. The beneficial effects are that the oil field tank field grounding grid fault detection device provided by the invention is convenient to carry, can meet the requirements of trenchless detection, is high in precision, is convenient and quick in measurement, and is quick in data transmission and processing.
Description
technical field [0001] The invention relates to the technical field of power system safety diagnosis devices, in particular to a fault detection device for grounding grids in oil field tank farms. Background technique [0002] The grounding grid of the oil field tank area is the main channel for the discharge of lightning current, and it is the basic measure to ensure the safety of lightning protection in the oil field tank area. If the grounding grid is severely corroded and fractured, the grounding resistance increases and the distribution of the ground potential is uneven, it will significantly reduce the speed of lightning current or lightning electrostatic induction charge discharge into the ground, and spark discharge or high-potential counterattack will occur between the metal accessories of the storage tank. The oil and gas are ignited and detonated, causing major safety accidents and losses. At present, the methods for grounding grid fault detection are mainly divi...
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IPC IPC(8): G01R31/08
CPCG01R31/086
Inventor 尹志清吴孔兵齐静静马驰骋张恺张凤侯增鹏
Owner CHINA PETROLEUM & CHEM CORP
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