Abstract
This paper aims to develop a small-signal stability analysis method for large-scale power electronics-based power systems. For this purpose, the nodal admittance matrix (NAM)-based approach is recognized as the most precise technique. However, the original implementation of NAM method is tailored for the entire system, thereby correlating the matrix dimensions with the number of converters present in the system. Consequently, it becomes impractical to directly apply the original NAM method to a large-scale system. To address this challenge, this paper introduces a novel system-partitioning-based NAM approach. In this method, the large-scale system is decomposed into several subsystems first, followed by analysis at the interconnection level. The general concept, the detailed mathematical derivation, and the applications of the proposed method to a 6-converter system and a modified 140-bus NPCC system are presented. It has been validated that the proposed approach can significantly reduce computational burden while simultaneously preserving the accuracy for large-scale PE-rich power systems.
| Original language | English |
|---|---|
| Pages (from-to) | 280-292 |
| Number of pages | 13 |
| Journal | IEEE Open Access Journal of Power and Energy |
| Volume | 11 |
| DOIs | |
| State | Published - 2024 |
Funding
This material is based upon work supported by the US Department of Energy, Office of Electricity, Advanced Grid Modeling Program under contract DE-AC05-00OR22725. This work also made use of Engineering Research Center Shared Facilities provided by the Engineering Research Center Program of the National Science Foundation and the Department of Energy under NSF Award Number EEC1041877 and the CURENT Industry Partnership Program.
| Funders | Funder number |
|---|---|
| CURENT | |
| U.S. Department of Energy | DE-AC05-00OR22725 |
| National Science Foundation | EEC1041877 |
Keywords
- Small-signal stability
- large-scale power electronics-rich power systems
- nodal admittance matrix
- system partition