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Busbar protection

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facetoface

Electrical
Joined
Apr 23, 2005
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50
Location
PS
How can I increase the earthing at 11KV busbar if the generator is S/d
 
eyadco
You need to give more details as to what you are trying to do.
 
Again, we have four syn.generator 11KV with neutral resistance to ground and energized power plant through stepup trnasformer 11/220KV , and each generator supplay some auxialry from the B.O.P and when the generator is stopping , we have to energize the auxailary through feedback of 11/220KV
1-4.nos step up transformer is 11/220KV ,31MVA,Zk=12% and neutarl is grounding from the secondary site
2.the neutarl of generator is small resistance 10A/10S
3.the earth resistance of the plant .8 Ohm
4.without gasturbine 11KV system has only earthing through voltage transformer and the natural system capacitances to earth
5-The neutral of busbar is solidy(no neutarl)
6-the protection is at busbar 11KV and is earth fault
 
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