Abstract
When low-frequency oscillations occur in a power system, the oscillating generators exchange oscillation energy through the branches in the network, so the branches contain rich oscillation information. Aiming at the problem of identifying the oscillation region in different modes, a low-frequency oscillation region location method based on the branch mode oscillation energy is proposed in this paper. First, on the basis of deriving the power system energy function satisfying the law of energy conservation, the branch oscillation energy is defined to study the system oscillation law from the perspective of network. It is found that the branch oscillation energy is superimposed by several branch oscillation modes, and a method for extracting the branch oscillation energy in multiple modes is proposed. Then, the analytical relationship between the branch mode oscillation energy and generator state variables is established through theoretical derivation, which lays a foundation for the study of low-frequency oscillation problems by using the branch mode oscillation energy. Finally, a low-frequency oscillation region localization method based on branch mode oscillation energy is established, and the effectiveness of the method is verified by simulation analysis.
| Translated title of the contribution | Low-frequency Oscillation Area Location Method Based on Branch Mode Oscillation Energy |
|---|---|
| Original language | Chinese (Simplified) |
| Pages (from-to) | 6589-6601 |
| Number of pages | 13 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 43 |
| Issue number | 17 |
| DOIs | |
| State | Published - Sep 2023 |
Keywords
- branch mode oscillation energy
- energy conservation
- localization of oscillation region
- low-frequency oscillation
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering