Model order reduction of multi-terminal direct-current grid systems
File(s)
Accepted version
Author(s)
Ali, Husni
Pal, Bikash
Type
Journal Article
Abstract
This paper proposes a methodology to develop a linear low-order model of a multi-terminal direct-current (MTDC) system connected to practically-sized offshore wind farm systems. The method individually linearizes the model of wind farm systems and subsequently performs model order reduction (MOR) using iterative rational Krylov algorithm (IRKA). This is, therefore, a modular approach and expandable to any number of wind farm connections. On the other hand, the model order and non-linearity of other components are retained. Effectiveness of the proposed method is demonstrated on an MTDC system connected to two large-scale wind farm models by comparing the responses obtained from the full order model (FOM) and reduced order model (ROM). From the simulation studies, it can be seen that the ROM obtained from proposed method is able to maintain high degree accuracy of FOM responses at a much faster simulation time, and hence this can help power system operation planning. Various control functionalities and strategies, different operating conditions and faults of the MTDC system are also considered to investigate robustness of the proposed method.
Date Issued
2021-01-01
Date Acceptance
2020-06-25
Citation
IEEE Transactions on Power Systems, 2021, 36 (1), pp.699-711
ISSN
0885-8950
Publisher
Institute of Electrical and Electronics Engineers
Start Page
699
End Page
711
Journal / Book Title
IEEE Transactions on Power Systems
Volume
36
Issue
1
Copyright Statement
© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Subjects
Science & Technology
Technology
Engineering, Electrical & Electronic
Engineering
Multi-terminal direct-current
wind farm model order reduction
iterative rational Krylov algorithm
Energy
0906 Electrical and Electronic Engineering
Publication Status
Published
Date Publish Online
2020-06-29