A minefield fault temporary waveform diagnosis method and device
A technology of transient waveforms and diagnostic methods, applied in design optimization/simulation, special data processing applications, etc., can solve problems such as difficult to judge the authenticity of fault recording waveforms, fault analysis, etc.
Active Publication Date: 2020-11-17
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
[0008] The invention provides a method and device for diagnosing the transient waveform of a lightning arrester fault, which solves the technical problem that it is difficult to judge the authenticity of the fault recording waveform and perform fault analysis at present
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Embodiment Construction
[0049] The embodiment of the invention provides a method and device for diagnosing the fault transient waveform of an arrester, which solves the current technical problem that it is difficult to judge the authenticity of the fault recording waveform and perform fault analysis.
[0050] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0051] see figure 1 , an embodiment of the present invention ...
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The invention discloses a lightning arrester fault transient waveform diagnosis method and device. According to the method and the device, a lightning arrester fault simulation model is established and a simulation test is carried out; when a deviation value between a simulation voltage waveform of a secondary side of a mutual inductor model and an actually measured voltage waveform of fault recording is smaller than or equal to a first deviation threshold, it shows that the authenticity of a simulation result of the mutual inductor model is high; at this time, if the deviation value between the simulation voltage waveform of the secondary side of the mutual inductor model and the simulation voltage waveform of a primary side of the mutual inductor model is greater than a second deviationthreshold, it shows that the simulation voltage waveform of the secondary side is deformed; a simulation current waveform of the secondary side of the mutual inductor model is obtained; the impulse current maximum amplitude and an energy withstand total value are calculated according to the simulation current waveform; and if the impulse current maximum amplitude and the energy withstand total value are smaller than set values, a lightning arrester fault type is a lightning arrester defect fault, otherwise, the lightning arrester fault type is a lightning arrester model selection fault. The technical problem that the authenticity of a fault recording waveform is difficult to judge and the fault analysis is difficult to carry out is solved.
Description
technical field [0001] The invention relates to the technical field of electric power fault analysis, in particular to a method and device for diagnosing a fault transient waveform of an arrester. Background technique [0002] Due to lightning strikes and equipment failures, power outages and equipment damages occur frequently in the power system, which can easily cause huge economic losses. Therefore, it is necessary to analyze the cause of the specific failure and propose amendments. [0003] Surge arresters are the main equipment for lightning protection in power systems. The analysis of the behavior characteristics of surge arresters in faults not only involves whether the protection range and insulation coordination in faults meet the requirements, but also involves the structural design, operating status and energy absorption of the arrester itself. Whether it is normal, so as to analyze and judge the cause of the failure. [0004] During the fault occurrence, the pow...
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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 周原蔡玲珑杨贤赵晓凤
Owner GUANGDONG POWER GRID CO LTD