Application of “stability index” to assess the stability of multi-machine systems

✍ Scribed by A. Ghafurian

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 397 KB
• Volume: 305
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(78)90122-9

✦ Synopsis

A new stability index is presented in this paper which may easily be calculated using the information obtained from the load flow study and the fault location and time.

No information from previous transient stability studies of the system is required. The conventional methods of studying transient stability require long computing time whereas the use of stability index is a very fast method of assessing the system's stability. Application of the index provides a very quick insight into the behaviour of the generator under a three-phase fault and identifies the critical situations.

Results of the calculation of this index for a sample power system are included and within a reasonable accuracy agree with the results of a full transient stability analysis.

FIG. 2. Application of equal area criteria.