Transient Stability in industrial network

Click For Summary

Discussion Overview

The discussion revolves around transient stability simulations in an isolated electrical network, specifically addressing the behavior of generators during fault conditions on buses and cables. Participants explore the implications of different fault locations and parameters on system stability.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant reports that while faults on buses allow generators to return to a stable state, faults on cables lead to diverging rotor angles, indicating instability.
  • Another participant suggests that the location of the fault may affect the generator's ability to maintain synchronism, particularly if faults are not cleared promptly.
  • A participant notes that reducing the fault duration to 80ms does not resolve the instability when faults occur on cables, even though longer fault durations on buses do not cause issues.
  • There is speculation about the presence of additional elements, such as transformers, between the generator's bus terminals and cable terminals that may influence stability.
  • One participant mentions attempting to isolate the problem by removing subsystems from the network to better understand the issue.

Areas of Agreement / Disagreement

Participants express differing views on the causes of instability during cable faults, with no consensus reached on the underlying issues or solutions. The discussion remains unresolved regarding the specific factors contributing to the observed behavior.

Contextual Notes

Participants acknowledge the complexity of the network and the potential influence of various parameters and configurations, but specific assumptions and definitions remain unclear.

sabersteg
Messages
3
Reaction score
0
Hi All
I have done transient stability simulations on isolated electrical network using ETAP 7.5 software.
Problem: On buses Faults generators return to stable stade
But on cable faults, rotor angle is diverged so the system is not stable.
To be noted that we have 2 SOLAR generators of 5MW, exciter is AC8B and governor is ST70.
Please can you help me to know what can be the problem!
Regards
 
Engineering news on Phys.org
As far as I can *decipher* your post this would mean the fault conditions on cable terminals (or somewhere in the network far from generator) gives more difficulty for the generator's rotor to stay in synchronism after the fault. This can happen in various ways if the faults are not cleared in time. But I've never work with that software and don't know about your generators and cables network parameters to be more specific.
 
Thanks zoki85 for your reply.
Time fault is reduced to 80ms. What I don't understant that when fault applied on Bus loacted at the extremity of the cable or on the beginning we have no problem even if time fault increase to 250ms.So I can Conclud that I have no parameter problem on generators. But when fult is applied in the cable at any distance we have the rotor angle unstable. I have tried many types of exciters with different parameters : the same problem.
 
sabersteg said:
But when fult is applied in the cable at any distance we have the rotor angle unstable. I have tried many types of exciters with different parameters : the same problem.
Is there maybe some element (transformer?) between generator's bus terminals and cable terminals?
 
Due to number of elements in the network, I try to isolate the problem by deleting sub systems. I will inform you in few time
Thanks
 

Similar threads

Transient Stability Analysis for Solar-Integrated Electrical Grid
  • · Replies 1 ·
Replies
1
Views
3K
  • Poll Poll
Microwave Engineering by David Pozar
  • · Replies 3 ·
Replies
3
Views
8K
Could New Materials Propel China's Industry to Bill Gates-Level Success?
  • · Replies 4 ·
Replies
4
Views
10K
April Fool's Physics Papers 2026
  • · Replies 2 ·
Replies
2
Views
505
Civilization of millions of rings.
  • · Replies 3 ·
Replies
3
Views
5K
Graduate Starring Gravity, Co-Starring Magnetism
  • · Replies 7 ·
Replies
7
Views
4K
News Bush Administration: My Indictment
  • · Replies 3 ·
Replies
3
Views
4K