A Graph Analysis Method for Optimal Arrester Arrangement in 110kv/220kv Transmission Lines
A technology for transmission lines and arresters, which is applied to the field of lightning protection of power grid transmission line systems, can solve the problem that the selection method of the configuration position of the arrester is not intuitive, and achieve the effects of clear calculation results, reduction of the number of arresters, and scientific, economical and reasonable configuration.
Inactive Publication Date: 2018-12-11
SOUTH CHINA UNIV OF TECH +1
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[0005] The purpose of the present invention is to overcome the lack of intuition of the existing method for selecting the configuration position of lightning arresters in transmission lines, and propose a graphical analysis method for optimal configuration of lightning arresters in 110kV / 220kV transmission lines, which belongs to a statistical analysis of graphical analysis of tower flashover conditions method, applicable to the statistical analysis of lightning flashovers of lines with different span lengths, different lightning strike points, and different arrester configuration methods
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[0020] The present invention will be further described below in conjunction with specific examples.
[0021] The graphical analysis method for optimizing the configuration of lightning arresters for 110kV / 220kV transmission lines described in this embodiment belongs to a statistical analysis method for graphically analyzing the flashover of towers. The state simulation program ATP simulates the key section of the transmission line, and then calculates the critical value of the lightning current that leads to counter-flashover, and compares the lightning protection effects under different densities of arresters. Finally, for different arrester configuration densities and different lightning strike locations, the table In this way, we can visually record the flashover situation of the tower, and observe the lightning flashover probability of this section of the line directly to obtain the optimal configuration of the lightning arrester for 110kV and 220kV transmission lines. It ...
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The invention discloses a graphic analysis method for optimization configuration of a lightning arrester on a 110kV / 220kV power transmission line. The method comprises: firstly, performing ATP simulation on a key section of the power transmission line by adopting an electromagnetic transient simulation program in combination with parameters of the power transmission line and a power transmission line tower; secondly, calculating a critical value of lightning stroke current causing back flashover, and comparing lightning protection effects in different lightning arrester configuration densities before and after configuration of the lightning arrester; and finally, visually recording a situation that the flashover occurs to the tower in a forms mode for different lightning arrester configuration modes and different lightning stroke positions, and visually observing a lightning flashover probability of the section of the line to obtain the optimization configuration of the lightning arrester on the 110kV / 220kV power transmission line. The graphic analysis method belongs to a statistic analysis method for graphically analyzing a flashover situation of the tower, is suitable for statistic analysis of lightning stroke flashover of lines with different span lengths, different lightning stroke points and different lightning arrester configuration densities and modes, and is visual, easy to understand, simple, clear and easy to apply and popularize.
Description
technical field [0001] The invention relates to the field of lightning protection for power grid transmission line systems, in particular to a graphic analysis method for optimally configuring lightning arresters for 110kV / 220kV transmission lines. Background technique [0002] In the power system, the configuration of the arrester directly affects the system overvoltage and insulation coordination, and plays a vital role in the safe and stable operation of the power system. The arrester prevents lightning flashover by maintaining the voltage between the insulators of the transmission line below the insulation withstand capacity. In general, for transmission lines without shielded wires, the arrester at each insulator position is equivalent to replacing the shielded wires for protection. For transmission lines with shielded wires, the line arrester is mainly used for difficult line inspection or ground resistivity. Higher remote areas to improve power supply reliability. ...
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IPC IPC(8): G06F17/50
Inventor 刘刚周露邱梓庭朱小健
Owner SOUTH CHINA UNIV OF TECH