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    Home > Chemicals Industry > Chemical Technology > State Grid promotes line parallel clearance technology

    State Grid promotes line parallel clearance technology

    • Last Update: 2022-11-17
    • Source: Internet
    • Author: User
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    On August 19, news came from the State Grid Operation Inspection Department that the State Grid Corporation of China set up a working group composed of the Ministry of Transportation Inspection, the Ministry of Infrastructure, the Ministry of Safety Supervision, the State Investigation Center and the China Electric Power Research Institute to accelerate the promotion and application
    of parallel clearance technology of overhead transmission lines.

    It is reported that the work of the working group will focus on the following aspects: optimizing the technical parameters of parallel clearance, standardizing the specifications and models of parallel clearance, improving the technical guidelines for parallel clearance, clarifying the principle of parallel clearance selection, the scope of use, and the installation and acceptance criteria; For the line with the parallel gap installation, a reasonable lightning trip rate index is proposed, and the lightning fault line inspection requirements of the installation parallel gap line are reasonably adjusted to effectively reduce the line fault patrol workload; Increase the number of parallel gap pilot applications and lines, and gradually extend the pilot scope to all voltage level transmission lines of 500 kV and below in provincial companies; On the basis of conscientiously summarizing the operation experience, gradually carry out the pilot application of infrastructure engineering lines, and strive to realize the comprehensive promotion of parallel gap technology in the company's infrastructure and transformation projects; Strengthen the refinement, summary and publicity of the research and pilot application results of parallel gap technology of transmission lines, promote the continuous and effective installation of parallel gap installation, and ensure practical results
    .

    Parallel gap lightning protection technology uses the gap device connected on both sides of the insulator string in parallel to connect lightning, channel the power frequency arc, and avoid the insulator being burned by the arc, which helps to improve the resynthesis power of the line and reduce the workload of operation and maintenance, and is widely used
    in Europe, Japan and other countries and regions.
    In recent years, with the continuous strengthening of the power grid structure and the large-scale use of sulfur hexafluoride switchgear and microcomputer protection devices, the conditions for the company to promote the application of parallel clearance technology have been met
    .
    Since 2010, the State Grid Operation Inspection Department has organized the China Electric Power Research Institute to carry out the application research of parallel gap technology of insulators for 110 kV to 500 kV lines, and carried out the pilot application of parallel gap technology on 118 2540 km 35 kV to 500 kV lines in Beijing, Jibei and Zhejiang Electric Power of State Grid, which has effectively reduced the failure
    rate of lightning strikes, protected insulators and reduced the workload of fault patrol.

    On August 19, news came from the State Grid Operation Inspection Department that the State Grid Corporation of China set up a working group composed of the Ministry of Transportation Inspection, the Ministry of Infrastructure, the Ministry of Safety Supervision, the State Investigation Center and the China Electric Power Research Institute to accelerate the promotion and application
    of parallel clearance technology of overhead transmission lines.

    Parallel clearance technology

    It is reported that the work of the working group will focus on the following aspects: optimizing the technical parameters of parallel clearance, standardizing the specifications and models of parallel clearance, improving the technical guidelines for parallel clearance, clarifying the principle of parallel clearance selection, the scope of use, and the installation and acceptance criteria; For the line with the parallel gap installation, a reasonable lightning trip rate index is proposed, and the lightning fault line inspection requirements of the installation parallel gap line are reasonably adjusted to effectively reduce the line fault patrol workload; Increase the number of parallel gap pilot applications and lines, and gradually extend the pilot scope to all voltage level transmission lines of 500 kV and below in provincial companies; On the basis of conscientiously summarizing the operation experience, gradually carry out the pilot application of infrastructure engineering lines, and strive to realize the comprehensive promotion of parallel gap technology in the company's infrastructure and transformation projects; Strengthen the refinement, summary and publicity of the research and pilot application results of parallel gap technology of transmission lines, promote the continuous and effective installation of parallel gap installation, and ensure practical results
    .

    Parallel gap lightning protection technology uses the gap device connected on both sides of the insulator string in parallel to connect lightning, channel the power frequency arc, and avoid the insulator being burned by the arc, which helps to improve the resynthesis power of the line and reduce the workload of operation and maintenance, and is widely used
    in Europe, Japan and other countries and regions.
    In recent years, with the continuous strengthening of the power grid structure and the large-scale use of sulfur hexafluoride switchgear and microcomputer protection devices, the conditions for the company to promote the application of parallel clearance technology have been met
    .
    Since 2010, the State Grid Operation Inspection Department has organized the China Electric Power Research Institute to carry out the application research of parallel gap technology of insulators for 110 kV to 500 kV lines, and carried out the pilot application of parallel gap technology on 118 2540 km 35 kV to 500 kV lines in Beijing, Jibei and Zhejiang Electric Power of State Grid, which has effectively reduced the failure
    rate of lightning strikes, protected insulators and reduced the workload of fault patrol.

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