Stability Analysis and Location Optimization Method for Multiconverter Power Systems Based on Nodal Admittance Matrix

Authors:
Publisher website
Google Scholar
Abstract
This paper presents an impedance-based method for stability analysis of multi-converter power systems based on the Generalized Nyquist Stability Criterion. The return-ratio matrix of the system is formulated on the basis of the nodal admittance matrix as well as output admittance of the converters, which can be applicable for the large-scale systems with complicated structure. A modified IEEE 13-bus system is used as the testing system, which shows that the proposed method can be easily implemented for location optimization of the converters. And the participation factors of return-ratio matrix’s critical eigenvalues (which encircle the critical point (-1, 0j)) at the instability frequencies are used to identify which converters have significant contributions to the instability, and then guidance for the design of system parameters can be provided. Simulations in PSCAD/EMTDC validate the effectiveness of the proposed stability analysis method.
Funding Information
  • National Key Research and Development Program of China (2018YFB0904100)
  • Hunan Provincial Innovation Foundation for Postgraduate (CX2018B168)

This publication has 23 references indexed in Scilit: