Correction method of electrification detection result of state of alternating-current gapless metal oxide arrester
A technology of live detection and arrester, applied in instruments, measuring devices, measuring electrical variables, etc., to achieve the effects of improving accuracy, effectiveness and accuracy, and simple correction
Inactive Publication Date: 2016-12-21
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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This raises doubts about the effectiveness of UHV MOA live detection and the adaptability of fault criteria
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[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
[0031] The present invention provides a method for correcting the state live detection result of an AC gapless metal oxide arrester, which includes the following steps: 1) Obtaining the characteristic parameters of the arrester obtained from the live detection of the state of the AC gapless metal oxide arrester, including the continuous operating current and the resistance of the arrester. 2) Considering external influence factors to correct the characteristic parameters of the arrester.
[0032] Under the continuous operating voltage of AC power frequency, the continuous current I fl...
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The invention relates to a correction method of an electrification detection result of an state of an alternating-current gapless metal oxide arrester. The correction method comprises following steps of: 1) obtaining an arrester characteristic parameter obtained through electrification detection on the state of the alternating-current gapless metal oxide arrester; and 2) carrying out correction on the characteristic parameter of the arrester by considering external influencing factors, wherein the external influencing factors comprise an external insulation surface dirty state and body temperature of the arrester: specifically, 201) carrying out dirty state correction on the characteristic parameter by considering the external insulation surface dirty state of the arrester so as to obtain a first corrected characteristic parameter; and 202) carrying out temperature correction on the first corrected characteristic parameter by considering the body temperature of the arrester so as to obtain a final corrected characteristic parameter. Compared with the prior art, the correction method provided by the invention is advantageous in that the effectiveness and accuracy of the electrification detection result are improved.
Description
technical field [0001] The invention belongs to the field of electrical engineering, and relates to a state live detection technology of an AC gapless metal oxide arrester, in particular to a method for correcting the state charge detection result of an AC gapless metal oxide arrester. Background technique [0002] Gapless Metal Oxide Arrester (MOA) is an important line of protection for power system equipment, and its operating status directly affects the protection effect and operational reliability. Live detection is an important means to check the operation status of MOA. However, with the improvement of MOA manufacturing technology and the adjustment of resistor sheet formulation process, the state parameter characteristics of MOA have changed significantly, and the traditional MOA state detection method cannot guarantee the validity and correctness of detection. The test results of several ultra-high voltage power stations in operation show that the change of the char...
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CPCG01R35/005
Inventor 赵丹丹郭洁肖嵘周越杨凌辉张嘉旻
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO