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High frequency voltage common mode

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Guilhermebr

Electrical
Joined
May 3, 2015
Messages
49
Location
BR
Hi.

The picture was measurement Phase to Earth in 3 winding 400V-231V in the transformer with 3 winding in same core. 1 Winding in High voltage 12kv, 2 winding in 690v for inverter back to back.
IMG-20170921-WA0008_vxgk4h.jpg


The high frequency in sine wave measurmet can have relations with common mode from inverter back to back in 2 winding? The emc filter schaffner can be making the situation worse?
20171025_145143_nci9xd.jpg

20171025_153637_qeyskn.jpg


The inverter back to back is used for reactive Power, frequency control nas other things in dfig Wind generator

GS
 
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