Method for two-dimensional lightning leader progress model to acquire electric potential in mountainous terrain
A terrain and pilot technology, applied in the direction of measuring current/voltage, measuring electrical variables, instruments, etc., can solve problems such as being too ideal
Active Publication Date: 2014-11-26
STATE GRID HUBEI ELECTRIC POWER RES INST +2
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In some literature, infinite slopes are used to represent mountainous terrain, which is too idealistic
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[0028] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.
[0029] figure 1 Shown is the flow chart of the acquisition method of the electric potential of the two-dimensional lightning leader development model of the present invention under the mountainous terrain, including the following steps:
[0030] Step 10: Extracting the actual terrain data of the transmission line through the geographic information system, the actual terrain data at least including the height of the mountaintop, the depth of the valley and the coordinates of the relevant points in the transmission line.
[0031] Step 20: Fit the actual terrain of the transmission line, use the actual terrain data obtained in step 10 to find the parameters related to the terrain in the corresponding conformal transformation function, and then use the conformal transformation function to transform the moun...
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The invention relates to a method for a two-dimensional lightning leader progress model to acquire electric potential in mountainous terrain. The method includes: extracting actual terrain data of a power transmitting circuit via a geographic information system, matching an actual terrain of the power transmitting circuit and determining terrain-related parameters in a corresponding conformal transformation function according to the actual terrain data, transforming the mountainous terrain into a plane terrain by utilizing the conformal transformation function, imaging a guide channel after the conformal transformation, and calculating electric potential of a random point in a space according to an image method, wherein a conformal transformation function adopted for a mountaintop terrain is represented as a formula, a conformal transformation function adopted for a valley terrain is represented as a formula, z=x+i (y+d1), the z is a coordinate of a complex plane point prior to conformal transformation, w=u+i (v+d1), the w is a coordinate of a complex plane point after conformal transformation, the d and the d1 are the terrain-related parameters, and the formula for calculating the electric potential of a random point S (x, y) in the space is represented as follow: formula. The problem for calculating the electric potential of a leader progress model in the mountainous terrain is solved.
Description
technical field [0001] The invention relates to the field of lightning shielding analysis of transmission lines, in particular to a method for obtaining potentials of a two-dimensional lightning leader development model under mountainous terrain. Background technique [0002] With the development of the national economy and the continuous growth of power demand, the safety problems of power production are becoming more and more prominent. For transmission lines, lightning tripping has always been an important factor affecting the reliability of power supply for high-voltage transmission lines. Operation experience at home and abroad shows that shielding is the main reason for lightning tripping of high-voltage transmission lines. Recently, there are many methods for evaluating the shielding lightning resistance performance of transmission lines. For example, the rule method believes that the shielding rate has nothing to do with the magnitude of the lightning current, and t...
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IPC IPC(8): G01R19/00
Inventor 姚尧阮羚周文俊喻剑辉唐泽洋李涵
Owner STATE GRID HUBEI ELECTRIC POWER RES INST