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Participant

Join Date: Jun 2014
Posts: 1

Negative Sequence Current

06/26/2014 1:03 PM

Is there any direct or indirect relation among " Negative sequence current,harmonic distortion and Leading PF of a power system ?? Please tell me.

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Anonymous Poster #1
#1

Re: NEGATIVE SEQUENCE CURRENT

06/26/2014 1:43 PM

How many points is this problem worth and when is it due?

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Guru
Engineering Fields - Power Engineering - New Member

Join Date: May 2007
Location: NYC metropolitan area.
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#2

Re: NEGATIVE SEQUENCE CURRENT

06/26/2014 2:35 PM

Please tell us what you have researched the answer to be then we will all be in a better position to discuss.

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Guru

Join Date: Oct 2008
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#3

Re: Negative Sequence Current

06/26/2014 6:07 PM

Do you understand what each of these term means, independently?

Surely, you must have some thoughts on this, yes?

If you can define them for us, we will help you find any relations, indirectly.

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Power-User

Join Date: Jun 2010
Location: Canada
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#4

Re: Negative Sequence Current

06/26/2014 10:45 PM

Negative sequence is negative sequence - and you know all about it . . . ?

Harmonic distortion is harmonic distortion - and you about it as well . . .

And leading power factor is leading power factor . . .

It is possible to obtain all of the above at the same time when you have a system fault or a non-linear load.

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Commentator

Join Date: Jan 2014
Location: Korba, Chattisgarh, India 495450
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#5
In reply to #4

Re: Negative Sequence Current

06/27/2014 12:34 AM

If I understand things correctly-

Power factor is a load quality and not the source.

Again negative sequence is for unbalance on load side not in source.

Harmonics is a source quality and at times generaatyed due to load parameters also.

Harmonics distirt the things and generates heat and noise so power is lost and power factor starts lagging.

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Power-User

Join Date: Jun 2010
Location: Canada
Posts: 139
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#6
In reply to #5

Re: Negative Sequence Current

06/27/2014 12:48 AM

If you remove the load, . . and find supply in good condition, . . . then problem is in the load.

If there is no change in the supply after removing load - then problem is in the supply.

The supply may well have negative sequence for a variety of reasons.

Harmonic distortion has little to do with power factor.

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