Power transmission line discharge fault locating method based on electric field mutation and monitoring device thereof
A transmission line and fault location technology, applied in fault location, fault detection according to conductor type, signal transmission system, etc., can solve problems such as difficulty in precise location of line faults, inaccurate fault location measurement, etc., and is conducive to rapid analysis and processing and The effect of restoring power supply, saving traffic costs, and improving the level of safe operation
Inactive Publication Date: 2018-06-19
STATE GRID SHANDONG ELECTRIC POWER +1
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Problems solved by technology
[0005] In order to solve the deficiencies in the above-mentioned technical problems, the object of the present invention is to provide a method for locating discharge faults of transmission lines based on electric field mutations and a monitoring device, which can visually judge and quickly find and determine fault locations of transmission lines, and solve current faults. Inaccurate distance measurement and difficult engineering and technical problems in accurately locating line faults
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Embodiment 1
[0028] Such as Figure 1-3 As shown, the electric field mutation based transmission line discharge fault location method of the present invention comprises the following steps:
[0029] 1), the electric field sensor 9 of the monitoring device collects the electric field information on the transmission line, and the photographing device 4 is aimed at the line insulator and the space area along the line corridor;
[0030] 2) When a discharge fault (grounding and phase-to-phase short circuit) occurs in the area along the transmission line, the voltage at the fault point along the line decreases, and the intensity of the electric field in space decreases. The voltage is almost zero. Using the physical phenomenon that the voltage decreases and the surrounding electric field drops synchronously, the electric field sensor 9 senses the sudden change in the space electric field information. Specifically, after the amplitude of the space electric field strength reduction or the sudden c...
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The invention relates to the technical field of electric power system fault detection, and particularly relates to a power transmission line discharge fault locating method based on electric field mutation and a monitoring device thereof. The monitoring device comprises a host. The upper part of the host is provided with a supporting tube. The upper end of the supporting tube is provided with a photovoltaic panel. The host is internally provided with an electric field sensor, a photographing starting circuit, a photographing device, a memory, a data analysis processor, a signal transmission module and a power supply system. The image information of arc combustion discharge at the fault moment of the power transmission line can be automatically acquired, and the concrete position of the fault of the line body is judged by analyzing the arc combustion phenomenon of the line parts within the image photographing range at the fault moment so that a series problems of post-accident inspection of the power transmission line can be avoided, the inspection efficiency of the fault line can be enhanced, rapid analysis and processing of the fault and power supply recovery can be facilitated and the safe operation level of the power grid can be enhanced.
Description
technical field [0001] The invention relates to the technical field of power system fault detection, in particular to a method for locating a discharge fault of a transmission line based on an electric field mutation and a monitoring device. Background technique [0002] The transmission line is an important part of the power system, and it is the link between the power source, the substation and the power user. The transmission line is composed of foundation, pole tower, conductor, overhead lightning protection wire, insulator, fittings, grounding device, accessory device and environmental passage, etc., and realizes the power transmission function by establishing an electric field in the conductor space of the transmission line. They are criss-crossed, ranging from several kilometers to thousands of kilometers. Affected by factors such as the insulation level of the line itself, natural disasters, and external damage, tripping accidents caused by line insulation breakdown ...
Claims
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IPC IPC(8): G01R31/08G08C17/02
CPCG01R31/085G08C17/02
Inventor 刘兴华于芃孙学锋蒋涛宁尚元王涛于洋王世坤孙胜涛翟滢
Owner STATE GRID SHANDONG ELECTRIC POWER
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