Next Article in Journal
Existence of the Solutions of Nonlinear Fractional Differential Equations Using the Fixed Point Technique in Extended b-Metric Spaces
Next Article in Special Issue
Modelling of Consumption Shares for Small Wind Energy Prosumers
Previous Article in Journal
Secure the IoT Networks as Epidemic Containment Game
Article

Small-Signal Stability of Multi-Converter Infeed Power Grids with Symmetry

by 1, 1, 2,3,4 and 1,*
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2
Potsdam Institute for Climate Impact Research, 601203 Potsdam, Germany
3
Department of Physics, Humboldt University of Berlin, Newtonstrasse 15, 12489 Berlin, Germany
4
Centre for Analysis of Complex Systems, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Raúl Baños Navarro
Symmetry 2021, 13(2), 157; https://doi.org/10.3390/sym13020157
Received: 16 December 2020 / Revised: 17 January 2021 / Accepted: 19 January 2021 / Published: 20 January 2021
(This article belongs to the Special Issue Symmetry in Renewable Energy and Power Systems Ⅱ)
Traditional power systems have been gradually shifting to power-electronic-based ones, with more power electronic devices (including converters) incorporated recently. Faced with much more complicated dynamics, it is a great challenge to uncover its physical mechanisms for system stability and/or instability (oscillation). In this paper, we first establish a nonlinear model of a multi-converter power system within the DC-link voltage timescale, from the first principle. Then, we obtain a linearized model with the associated characteristic matrix, whose eigenvalues determine the system stability, and finally get independent subsystems by using symmetry approximation conditions under the assumptions that all converters’ parameters and their susceptance to the infinite bus (Bg) are identical. Based on these mathematical analyses, we find that the whole system can be decomposed into several equivalent single-converter systems and its small-signal stability is solely determined by a simple converter system connected to an infinite bus under the same susceptance Bg. These results of large-scale multi-converter analysis help to understand the power-electronic-based power system dynamics, such as renewable energy integration. As well, they are expected to stimulate broad interests among researchers in the fields of network dynamics theory and applications. View Full-Text
Keywords: power-electronic-based power system dynamics; multi-converter infeed power system; small-signal stability; large scale system analysis; network dynamics power-electronic-based power system dynamics; multi-converter infeed power system; small-signal stability; large scale system analysis; network dynamics
Show Figures

Figure 1

MDPI and ACS Style

Yu, J.; Yang, Z.; Kurths, J.; Zhan, M. Small-Signal Stability of Multi-Converter Infeed Power Grids with Symmetry. Symmetry 2021, 13, 157. https://doi.org/10.3390/sym13020157

AMA Style

Yu J, Yang Z, Kurths J, Zhan M. Small-Signal Stability of Multi-Converter Infeed Power Grids with Symmetry. Symmetry. 2021; 13(2):157. https://doi.org/10.3390/sym13020157

Chicago/Turabian Style

Yu, Jiawei, Ziqian Yang, Jurgen Kurths, and Meng Zhan. 2021. "Small-Signal Stability of Multi-Converter Infeed Power Grids with Symmetry" Symmetry 13, no. 2: 157. https://doi.org/10.3390/sym13020157

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop