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Title: Loss Minimization With Optimal Power Dispatch in Multi-Frequency HVac Power Systems

Abstract

Low-frequency high-voltage ac transmission scheme has recently been proposed as an alternative approach for bulk power transmission. This paper proposes a multi-period optimal power flow (OPF) for a multi-frequency HVac transmission system that interconnects both conventional 50/60-Hz and low-frequency grids using back-to-back converters with a centralized control scheme. The OPF objective is to minimize system losses by determining the optimal dispatch for generators, shunt capacitors, and converters. The OPF constraints include the operational constraints of all HVac grid and converter stations. The resulting mixed-integer nonlinear programing problem is solved using a proposed framework based on the predictor-corrector primal-dual interior-point method. The proposed OPF formulation and solution approach are verified using a multi-frequency HVac transmission system that is modified from the IEEE 57-bus system. Here, the results with the optimal dispatch from the proposed method during a simulated day show a significant loss reduction and an improved voltage regulation compared to those when an arbitrary dispatch is chosen.

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [4]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Univ. of Macau, Taipa (China)
  3. Hanoi Univ. of Science and Technology (Vietnam)
  4. Univ. of Texas, TX (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1633611
Report Number(s):
PNNL-SA-148760
Journal ID: ISSN 0885-8950
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Power Systems
Additional Journal Information:
Journal Volume: 35; Journal Issue: 3; Journal ID: ISSN 0885-8950
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; Back-to-back converter; low-frequency AC transmission; multi-frequency power systems; optimal power flow; interior point method

Citation Formats

Nguyen, Quan, Lao, Keng-Weng, Vu, Phuong, and Santoso, Surya. Loss Minimization With Optimal Power Dispatch in Multi-Frequency HVac Power Systems. United States: N. p., 2019. Web. https://doi.org/10.1109/TPWRS.2019.2953161.
Nguyen, Quan, Lao, Keng-Weng, Vu, Phuong, & Santoso, Surya. Loss Minimization With Optimal Power Dispatch in Multi-Frequency HVac Power Systems. United States. https://doi.org/10.1109/TPWRS.2019.2953161
Nguyen, Quan, Lao, Keng-Weng, Vu, Phuong, and Santoso, Surya. Thu . "Loss Minimization With Optimal Power Dispatch in Multi-Frequency HVac Power Systems". United States. https://doi.org/10.1109/TPWRS.2019.2953161. https://www.osti.gov/servlets/purl/1633611.
@article{osti_1633611,
title = {Loss Minimization With Optimal Power Dispatch in Multi-Frequency HVac Power Systems},
author = {Nguyen, Quan and Lao, Keng-Weng and Vu, Phuong and Santoso, Surya},
abstractNote = {Low-frequency high-voltage ac transmission scheme has recently been proposed as an alternative approach for bulk power transmission. This paper proposes a multi-period optimal power flow (OPF) for a multi-frequency HVac transmission system that interconnects both conventional 50/60-Hz and low-frequency grids using back-to-back converters with a centralized control scheme. The OPF objective is to minimize system losses by determining the optimal dispatch for generators, shunt capacitors, and converters. The OPF constraints include the operational constraints of all HVac grid and converter stations. The resulting mixed-integer nonlinear programing problem is solved using a proposed framework based on the predictor-corrector primal-dual interior-point method. The proposed OPF formulation and solution approach are verified using a multi-frequency HVac transmission system that is modified from the IEEE 57-bus system. Here, the results with the optimal dispatch from the proposed method during a simulated day show a significant loss reduction and an improved voltage regulation compared to those when an arbitrary dispatch is chosen.},
doi = {10.1109/TPWRS.2019.2953161},
journal = {IEEE Transactions on Power Systems},
number = 3,
volume = 35,
place = {United States},
year = {2019},
month = {11}
}

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