Substation Lightning Protection
Substation Lightning Protection
(OP)
When performing a lightning shielding study for a transmission substation do you consider the power transformer winding BIL or bushing BIL in your study?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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Substation Lightning Protection
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RE: Substation Lightning Protection
http://www.google.co.il/url?sa=t&rct=j&q=&...
The problem is more complex then it is seems to be.
I prefer to follow NFPA 780 recommendation.
RE: Substation Lightning Protection
RE: Substation Lightning Protection
Sounds like it does?
RE: Substation Lightning Protection
BIL is associated with travelling waves.
shielding is associated with lighning strokes.
RE: Substation Lightning Protection
RE: Substation Lightning Protection
higher BIL equipment can withstand a higher voltage surge . A very high surge current crossing an equipment, with nanosec of duration, is not a problem!
RE: Substation Lightning Protection
See page 37 of 7anoter4's link.
RE: Substation Lightning Protection
Question:
When performing a lightning shielding study for a transmission substation do you consider the power transformer winding BIL or bushing BIL in your study?
Answer:
No.
equipments BIL is associated with travelling waves.
shielding studies are associated with lighning strokes and busbar BIL.
In EHV substation if a lightning strikes the transformer it will explode!
In EHV substation if a lightning strikes the bus, a CT, PT or arrester will explode!
Shielding wires or masts are devices to deflect lightning strikes on substation equipments.