Abstract
The concepts of static angle stability and voltage stability are inconsistent, which brings inconvenience to stability analysis and control. In the views of dynamics, this paper argues that the essence of the power system static stability is the balance during the source-network-load power transformation process, while voltage is just a physical quantity which supports the conversion process. The value of voltage has not necessary internal relationship with system static stability, and it is just a bounded problem of a non-linear power system output variable. Therefore, this paper deduced the maximum system active power transmission capability, and its semi-circular boundary in R-X coordinate. Based on comprehensive physical parameter sensitivities, an applied criterion of generalized static stability, which expanded the static stability theory, was presented. In addition, the voltage support level index was given to measure system voltage support capability. Theory analysis and various simulation examples show the validity and rationality of the newly developed criterion, and it is expected to realize on-line static stability monitoring in power system based on wide-area measurement system (WAMS).
| Original language | English (US) |
|---|---|
| Pages (from-to) | 91-100 |
| Number of pages | 10 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 32 |
| Issue number | 7 |
| State | Published - Mar 5 2012 |
| Externally published | Yes |
Keywords
- Applied criterion
- Comprehensive parameter sensitivity
- Power systems
- R-X coordinate
- Static stability
- Wide-area measurement system
ASJC Scopus subject areas
- Electrical and Electronic Engineering