×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Zero Seq. Line Impedance angle higher than Positive Seq. angle

Zero Seq. Line Impedance angle higher than Positive Seq. angle

Zero Seq. Line Impedance angle higher than Positive Seq. angle

(OP)
My transmission line's Zero seq. impedance angle (89 deg)is higher than its positive seq. impedance angle (79 deg). Is this OK?

RE: Zero Seq. Line Impedance angle higher than Positive Seq. angle

Seems odd, particularly that it would be that high. Probably a math error somewhere.

RE: Zero Seq. Line Impedance angle higher than Positive Seq. angle

Just to give you a comparison, here are some values for comparison

CODE --> html

<table border=0 cellpadding=0 cellspacing=0 width=320 style='border-collapse:
 collapse;table-layout:fixed;width:240pt'>
 <col width=64 span=5 style='width:48pt'>
 <tr height=20 style='height:15.0pt'>
  <td height=20 class=xl65 width=64 style='height:15.0pt;width:48pt'>miles</td>
  <td class=xl65 width=64 style='border-left:none;width:48pt'>Z1 mag</td>
  <td class=xl65 width=64 style='border-left:none;width:48pt'>Z1 angle</td>
  <td class=xl65 width=64 style='border-left:none;width:48pt'>Z0 mag</td>
  <td class=xl65 width=64 style='border-left:none;width:48pt'>Z0 angle</td>
 </tr>
 <tr height=20 style='height:15.0pt'>
  <td height=20 class=xl65 align=right style='height:15.0pt;border-top:none'>4</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>2.8</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>81.62</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>9</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>80.89</td>
 </tr>
 <tr height=20 style='height:15.0pt'>
  <td height=20 class=xl65 align=right style='height:15.0pt;border-top:none'>2.3</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>1.5</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>83.15</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>6.44</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>82.72</td>
 </tr>
 <tr height=20 style='height:15.0pt'>
  <td height=20 class=xl65 align=right style='height:15.0pt;border-top:none'>0.85</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>0.56</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>82.3</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>2.3</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>82.42</td>
 </tr>
 <tr height=20 style='height:15.0pt'>
  <td height=20 class=xl65 align=right style='height:15.0pt;border-top:none'>36</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>29.4</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>65.9</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>87.7</td>
  <td class=xl65 align=right style='border-top:none;border-left:none'>73.7</td>
 </tr>
 <![if supportMisalignedColumns]>
 <tr height=0 style='display:none'>
  <td width=64 style='width:48pt'></td>
  <td width=64 style='width:48pt'></td>
  <td width=64 style='width:48pt'></td>
  <td width=64 style='width:48pt'></td>
  <td width=64 style='width:48pt'></td>
 </tr>
 <![endif]>
</table> 

http://GeneralPAC.com - Making power systems intuitive with awesome video tutorials!
The Wye Wye Transformer Connection video: http://gpac.link/1GdGRSQ

RE: Zero Seq. Line Impedance angle higher than Positive Seq. angle

The above post didn't come out right... here it is again...

miles Z1 mag Z1 angle Z0 mag Z0 angle
4 2.8 81.62 9 80.89
2.3 1.5 83.15 6.44 82.72
0.85 0.56 82.3 2.3 82.42
36 29.4 65.9 87.7 73.7

http://GeneralPAC.com - Making power systems intuitive with awesome video tutorials!
The Wye Wye Transformer Connection video: http://gpac.link/1GdGRSQ

RE: Zero Seq. Line Impedance angle higher than Positive Seq. angle

one more time...

Mag values are in per-unit with 100MVA and 115kV base.

miles: 4
Z1 mag: 2.8
Z1 angle: 81.62
Z0 mag: 9
Z0 angle: 80.9


miles: 2.3
Z1 mag: 1.5
Z1 angle: 83.15
Z0 mag: 6.45
Z0 angle: 82.72


miles: 0.85
Z1 mag: 0.56
Z1 angle: 82.3
Z0 mag: 2.3
Z0 angle: 82.42


miles: 36
Z1 mag: 29.4
Z1 angle: 65.9
Z0 mag: 87.7
Z0 angle: 73.7

http://GeneralPAC.com - Making power systems intuitive with awesome video tutorials!
The Wye Wye Transformer Connection video: http://gpac.link/1GdGRSQ

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources