Computation of transient voltages near complex caused by ligntning currents

Abstract

A h s t r a c t : S p a c i o u s and complex grounding s y s t e m s are o f t e n p a r t of a l i g h t n i n g p r o t e c t i o n sys tem i n i n d u s t r i a l and power p l a n t s . Large l i g h t n i n g c u r r e n t i m p u l s e s can c a u s e l a r g e t r a n s i e n t v o l t a g e s c o u p l e d t o c o n t r o l and s i g n a l c i r c u i t s i n n e a r v i c i n i t y t o t h e grounding sys tems. Two d i f f e r e n t computer programs are developed for numer ica l e v a l u a t i o n o f such t r a n s i e n t v o l t a g e s . I t is shown t h a t s i m p l i f i c a t i o n s u s e d i n p r e v i o u s computer models Lead t o e r r o n e o u s r e s u l t s .