A joint monitoring method for insulation state of switchgear
An insulation state and joint monitoring technology, applied in the field of switchgear, can solve the problem of inability to accurately evaluate the insulation state of switchgear
Active Publication Date: 2020-04-10
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST +1
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Problems solved by technology
[0005] This application provides a joint monitoring method for the insulation state of the switchgear to solve the technical problem that the existing detection method cannot make a more accurate assessment of the insulation state of the switchgear
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[0039] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0040] see figure 1 , which is a flow chart of a method for monitoring the insulation state of a switchgear provided in the embodiment of the present application; the embodiment of the present application provides a joint monitoring method for the insulation state of the switchgear, including:
[0041] Divide the insulation state of the swit...
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The invention discloses a switchgear cabinet insulation state joint monitoring method which comprises: dividing the insulation state of a switchgear cabinet into a plurality of insulation state levels; calculating the probabilities that a UHF signal belongs to respective insulation state levels; calculating the probabilities that an optical signal belongs to respective insulation state levels; calculating the combined probability distribution of UHF detection and fiber detection; setting a preset threshold, and determining, when the combined probability belonging to a certain insulation statelevel is greater than the threshold, that a currently acquired switchgear cabinet insulation state belongs to the insulation state level. The method provided by the present application uses the jointmonitoring of UHF signal detection and optical signal detection, fuses information through an evidence theory, and compares the historical data of the switchgear cabinet to obtain an insulation statejointly evaluated by the UHF signal detection and the optical signal detection. The method achieves accurate evaluation of the switchgear cabinet insulation state.
Description
technical field [0001] The present application relates to the technical field of switch cabinets, in particular to a method for joint monitoring of the insulation state of switch cabinets. Background technique [0002] Switchgear is widely used in the industrial field of our country and is an important part of the power distribution network. Its stable and reliable work is very important. [0003] With the long-term operation of the switchgear, affected by the surrounding environment, the insulation state in the cabinet gradually deteriorates. If the status of the switchgear is not monitored in time, it may cause unpredictable accidents in the later stage. When an insulation defect occurs, a partial discharge signal is generated inside it. Through the detection of partial discharge signals, the insulation defects in the switchgear can be predicted in advance, and the switchgear can be overhauled before further serious insulation faults occur, which can avoid large economic ...
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IPC IPC(8): G01R31/12
CPCG01R31/1218
Inventor 彭晶陈宇民韩璐瑶樊诗诗闫静耿英三王科谭向宇马仪李昊邓云坤
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST