Method for simulating lightning trip-out rates of 500kV transmission line with four circuits on same tower

A technology of lightning tripping rate and simulation method, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as increasing the cost of lines, affecting the safety and reliability of power grids, and making it difficult to ensure the accuracy of transmission lines. Achieve accurate calculation, improve safety and power supply reliability

CN102841280AActive Publication Date: 2012-12-26CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD +1
3 Cites 23 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2012-12-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for simulating lightning trip-out rates of a 500kV transmission line with four circuits on the same tower. The method comprises the following steps of: getting information of the tower, wherein the information of the tower comprises the height of a cross arm, an equivalent radius of a tower body and the width of the cross arm; establishing a multi-wave impedance model according to the information of the tower; establishing an insulator flashover criterion model based on an EPRI (Electric Power Research Institute) pilot model; establishing a horizontal lighting-resistant simulation model of the transmission line according to the multi-wave impedance model of the tower and the insulator flashover criterion model; adjusting a phase angle of a power supply and a simulated lighting current amplitude in the horizontal lighting-resistant simulation model of the transmission line, and then obtaining the lighting trip-out rate of each circuit of the transmission line, wherein the lighting trip-out rates comprise back flashover trip-out rates and shielding failure trip-out rates. By adopting the method for simulating lightning trip-out rates of the 500kV transmission line with four circuits on the same tower disclosed by the invention, lighting trip-out rates of the transmission line can be calculated accurately, so that security and power supply reliability of power grids are improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of design of power grid transmission lines, in particular to a method for simulating the lightning tripping rate of a 500kV four-circuit transmission line on the same tower. Background technique

[0002] With the development of economy and society, the society's demand for electric energy is increasing day by day, but the continuous development of land resources has led to the increasingly scarce transmission corridors available for grid construction. For this reason, erecting four 500kV transmission lines on the same tower to save precious land resources has become an inevitable trend in power grid construction. At the same time, it has also brought some new problems to be solved urgently, one of which is the accurate prediction of lightning tripping rate. estimate.

[0003] Taking the 500kV four-circuit transmission line on the same tower as an example, if the insulation configuration is too high, the tower head ga...

Examples

Embodiment Construction

[0015] In order to facilitate understanding of the present invention, the following will be described in conjunction with the accompanying drawings.

[0016] This invention proposes a simulation method for lightning tripping rate of 500kV four-circuit transmission line on the same tower, please refer to figure 1 , including steps:

[0017] S1. Obtain the tower information; wherein, the tower information includes: the height of the cross arm, the equivalent radius of the tower body, and the width of the cross arm;

[0018] S2. Establishing a tower multi-wave impedance model according to the tower information;

[0019] The multi-wave impedance model divides the tower into three parts: the tower body, the cross-arm, and the bracket, all of which are represented by wave impedance. For accurate calculation, each part is further refined into Multi-segment wave impedance; wherein, the step of establishing a tower multi-wave impedance model according to the tower information may inc...