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Tower grounding resistance computation method based on loop impedance testing

A technology of grounding resistance and loop impedance, which is applied in the field of tower grounding resistance calculation based on loop impedance testing, can solve problems such as errors in loop impedance test results, and achieve the effect of avoiding direct calculation

Active Publication Date: 2019-09-10
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and the purpose is to provide a method for calculating the grounding resistance of towers based on loop impedance testing, and to solve the problem of large errors in loop impedance testing results

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  • Tower grounding resistance computation method based on loop impedance testing

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Embodiment

[0030] Such as figure 1 As shown, the present invention a kind of tower grounding resistance calculation method based on loop impedance test, comprises the following steps:

[0031] Step 1: Obtain the basic information of the transmission line: obtain the number of towers of the transmission line, the horizontal distance between two suspension points in the plane parallel to the specific load of the conductors between two adjacent towers, and the signal of the ground wire.

[0032] Step 2: Establish the circuit model of the loop impedance of the transmission line: for each base tower, establish a circuit model for the test of the loop impedance method. The circuit model is an electrical network composed of the tower grounding resistance and the ground wire resistance.

[0033] Step 3: Obtain the loop impedance test value of each base tower: when testing the loop impedance value, use the loop impedance method to test the loop impedance value of each base tower.

[0034] Step 4...

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Abstract

The invention discloses a tower grounding resistance computation method based on loop impedance testing. The method comprises the following steps: acquiring basic information of a power transmission line, and establishing a circuit model of a loop impedance test for each tower; and after acquiring a loop impedance test value of each tower and the resistance value of each ground line, approximatinga real value of the tower grounding resistance through an iteration method. The problem that a test result error is large in the loop impedance method is solved after acquiring the real value of thetower grounding resistance, the real value of the tower grounding resistance is computed by adopting a loop impedance method test result, and the real value is the solving of the multielement higher-order equation on the theory; the direct solving of the higher-order equation is avoided by adopting the iteration method, an approximate value satisfying an engineering error requirement can be quickly obtained, and the method is convenient and practical.

Description

technical field [0001] The invention relates to the technical field of tower grounding resistance testing, in particular to a calculation method for tower grounding resistance based on loop impedance testing. Background technique [0002] The test methods for tower grounding resistance mainly include three-pole method and loop impedance method. Among them, the loop impedance method does not require setting-out testing, which greatly improves the test efficiency and is the trend of tower grounding resistance testing. However, the test results of the loop impedance method not only include the grounding resistance of the tower itself, but also include the equivalent value of the grounding resistance and ground wire impedance of other towers in the test loop, and there is a certain error in theory. The actual test found that the test result of loop impedance may be several times larger than the real value of the grounding resistance of the tower, which seriously affects the rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/20
CPCG01R27/20
Inventor 雷潇张星海廖文龙刘强崔涛曾宏吴驰
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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