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Supplementary Feedforward Voltage Control in a Reconfigurable Distribution Network using Robust Optimization

Title
Supplementary Feedforward Voltage Control in a Reconfigurable Distribution Network using Robust Optimization
Type
Article in International Scientific Journal
Year
2022
Authors
Park, JY
(Author)
Other
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Ban, J
(Author)
Other
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Kim, YJ
(Author)
Other
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Journal
Vol. 37
Pages: 4385-4399
ISSN: 0885-8950
Publisher: IEEE
Indexing
Other information
Authenticus ID: P-00X-E7M
Abstract (EN): Network reconfiguration (NR) has attracted much attention due to its ability to convert conventional distribution networks (DNs) into self-healing grids. This paper proposes a new strategy for real-time voltage regulation (VR) in a reconfigurable DN, whereby optimal feedforward control of distributed generators (DGs) is achieved in coordination with the operation of line switches (SWs). This enables preemptive compensation of upcoming deviations in DN voltages resulting from NR-aided load restoration. A robust optimization problem is formulated using a dynamic analytical model of NR to design the feedforward voltage controllers (FVCs) that minimize voltage deviations with respect to the H-infinity norm. Errors in the estimates of DG modeling parameters and load demands are reflected in the design of optimal FVCs via polytopic uncertainty modeling. Small-signal analysis and case studies are conducted, verifying the effectiveness and robustness of the optimal FVCs in improving real-time VR when NR is activated for load restoration. The performance of the proposed FVCs is confirmed under various conditions of a self-healing DN,characterized by network islanding and size, parameter errors, SW operations, and communication time delays.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 15
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