Same-tower double-circuit line lightning shielding failure lightning protection performance analysis method considering shielding effect among leads
A technology of double circuits on the same tower, analysis method, applied in the direction of testing dielectric strength, etc., can solve the problem of ignoring the mutual shielding effect of phase conductors
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[0234] The technical solutions of the present invention will be described below in conjunction with the accompanying drawings and specific examples. However, the invention should not be limited only within the scope of this example.
[0235] Such as figure 1 As shown, a method for analyzing lightning performance of double-circuit lines on the same tower. The analysis method is based on the electrical geometric model of the lightning performance analysis of double-circuit lines on the same tower (see attached figure 2 Shown) as the basis, calculate the conductor exposure distance, the critical lightning current of the conductor at different exposure distances, and the conductor flashover rate. formula based where S FFORC is the flashover probability of shielding, N g is the ground flash density, I cmax is the maximum lightning current around lightning, I c is the shielding lightning withstand level, Z is the exposure distance, and p(I) is the cumulative probability den...
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