Reduced-Order Models for Representing Converters in Power System Studies
By Yunjie Gu, Nathaniel Bottrell, T. Green. IEEE transactions on power electronics, 2018
147 citations recorded by the source corpus.
A reduced-order model that preserves physical meaning is important for generating insight in large-scale power system studies. The conventional model-order reduction for a multiple-timescale system is based on discarding states with fast (short timescale) dynamics. It has been successfully applied to synchronous machines, but is inaccurate when applied to power converters because the timescales of fast and slow states are not sufficiently separated. In the method proposed here, several fast states are at first discarded but a representation of their interaction with the slow states is added back. Recognizing that the fast states of many converters are linear allows well-developed linear system theories to be used to implement this concept. All the information of the original system relevant to system-wide dynamics, including nonlinearity, is preserved, which facilitates judgments on system stability and insight into control design. The method is tested on a converter-supplied mini power system and the comparison of analytical and experiment results confirms high preciseness in a broad range of conditions.
Subfields: Control and Systems Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/15b4fc12e51227a1ba30fb18b37dae1fb8295634
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Control and Systems Engineering
In Electrical and Electronic Engineering
Citations in the corpus
- Design-Oriented Transient Stability Analysis of PLL-Synchronized Voltage-Source Converters (2018, unknown): “Based on the principle of model order reduction, the fast dynamics of the system can be neglected when analyzing the impact of the slow dynamics [25].”
- Power System Stability With a High Penetration of Inverter-Based Resources (2023, methodology): “For the double-loop control, Xe is shaped by the control parameters [47], and for open-loop control, Xe equals the total output reactance.”
- An Overview of Assessment Methods for Synchronization Stability of Grid-Connected Converters Under Severe Symmetrical Grid Faults (2019, unknown): “Although this is still an unresolved problem, several recent publications [57], [58], among others, propose model-order reduction methods within the field of paralleled grid-connected converters and weak grid conditions such as inverter-based microgrids.”