Calculation method and device for 50% flashover voltage of combination gap of live working on transmission line
A technology of combining gap and flashover voltage, applied in the direction of testing dielectric strength, etc., can solve the problems of long insulator string length, large number of pieces, and high cost
Active Publication Date: 2020-08-14
DALI BUREAU OF ULTRA HIGH VOLTAGE TRANSMISSION CO CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology
[0004] However, due to the high tower of the UHV transmission line, the large size of the tower head, the large number of wire splits, the long length of the insulator string, the large number of pieces, and the large tonnage, the above-mentioned scheme consumes a lot of manpower, material resources and time in the simulation in the laboratory. resulting in higher costs
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[0085] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0086] Such as figure 1 As shown, it is a flow chart of a calculation method for the 50% flashover voltage of the live working combination gap of a transmission line in an embodiment of the present invention, including:
[0087] S11, calculating the ratio of the voltage borne by the man-tower gap to the voltage borne by the conductor-man-tower combination gap;
[0088] S12, calculate the 50% flashover voltage of the man-tower gap and the 50% flashover voltage of the wire-man gap;
[0089] S13, according to the ratio of the voltage borne by the man-tower gap to the voltage borne by the conductor-man-tower combined gap, the 50% flashover voltage of the man-tower gap and th...
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The invention relates to the technical field of transmission line live line work and discloses a transmission line live line work combined gap 50% flashover voltage calculation method and device. Thetransmission line live line work combined gap 50% flashover voltage calculation method comprises steps: a ratio of voltage withstood by a man-tower gap to voltage withstood by a conductor-man-tower combined gap is calculated; 50% flashover voltage of the man-tower gap and the 50% flashover voltage of a conductor-man gap are calculated; and according to the ratio of the voltage withstood by the man-tower gap to the voltage withstood by the conductor-man-tower combined gap, the 50% flashover voltage of the man-tower gap and the 50% flashover voltage of the conductor-man gap, 50% flashover voltage of the conductor-man-tower combined gap is calculated. Ultra high voltage DC transmission line live line work combined gap 50% flashover voltage can be calculated economically and quickly, acquisition of the ultra high voltage DC transmission line live line work combined gap 50% flashover voltage through a simulation test method is further avoided, and the cost is further effectively reduced.
Description
technical field [0001] The invention relates to the technical field of live work on transmission lines, in particular to a method and device for calculating the 50% flashover voltage of a combination gap of live work on a transmission line. Background technique [0002] my country's live-line work started in the early 1950s. At that time, the electric power industry had a weak foundation, a thin network frame, and outdated equipment, which often required power outages for maintenance and defect handling. Due to the urgent needs of production, in recent years, my country has vigorously developed the technology of live working to meet the current needs of overhaul and maintenance of high-voltage transmission lines. [0003] In order to ensure the personal safety of the workers, even if there is an operating impulse voltage on the conductors during the process of the workers entering the equipotential, the probability of possible breakdown of the combined gap must be acceptable...
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IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 项阳王卫刘磊马义刚李敏刘世增厉天威冯小晓唐力高晗胡宗华张华晟郑凇铭赵庆州
Owner DALI BUREAU OF ULTRA HIGH VOLTAGE TRANSMISSION CO CHINA SOUTHERN POWER GRID CO LTD