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Title: Optimal Power Scheduling for a Medium Voltage AC/DC Hybrid Distribution Network

Abstract

With the great increase of renewable generation as well as the DC loads in the distribution network; DC distribution technology is receiving more attention; since the DC distribution network can improve operating efficiency and power quality by reducing the energy conversion stages. This paper presents a new architecture for the medium voltage AC/DC hybrid distribution network; where the AC and DC subgrids are looped by normally closed AC soft open point (ACSOP) and DC soft open point (DCSOP); respectively. The proposed AC/DC hybrid distribution systems contain renewable generation (i.e., wind power and photovoltaic (PV) generation); energy storage systems (ESSs); soft open points (SOPs); and both AC and DC flexible demands. An energy management strategy for the hybrid system is presented based on the dynamic optimal power flow (DOPF) method. The main objective of the proposed power scheduling strategy is to minimize the operating cost and reduce the curtailment of renewable generation while meeting operational and technical constraints. The proposed approach is verified in five scenarios. The five scenarios are classified as pure AC system; hybrid AC/DC system; hybrid system with interlinking converter; hybrid system with DC flexible demand; and hybrid system with SOPs. Results show that the proposed scheduling methodmore » can successfully dispatch the controllable elements; and that the presented architecture for the AC/DC hybrid distribution system is beneficial for reducing operating cost and renewable generation curtailment.« less

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [2];  [3]
  1. Wuhan Univ. (China). School of Electrical Engineering
  2. Univ. of Denver, CO (United States). Dept. of Electrical and Computer Engineering
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); Natural Science Foundation of China (NSFC), Beijing (China); State Grid Corporation of China, Beijing (China)
OSTI Identifier:
1423191
Report Number(s):
NREL/JA-5D00-71008
Journal ID: ISSN 2071-1050; SUSTDE
Grant/Contract Number:
AC36-08GO28308; 51507116
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Sustainability (Basel)
Additional Journal Information:
Journal Name: Sustainability (Basel); Journal Volume: 10; Journal Issue: 2; Journal ID: ISSN 2071-1050
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; distribution network; dynamic optimal power flow; flexible demand; renewable energy; soft open point

Citation Formats

Zhu, Zhenshan, Liu, Dichen, Liao, Qingfen, Tang, Fei, Zhang, Jun, and Jiang, Huaiguang. Optimal Power Scheduling for a Medium Voltage AC/DC Hybrid Distribution Network. United States: N. p., 2018. Web. doi:10.3390/su10020318.
Zhu, Zhenshan, Liu, Dichen, Liao, Qingfen, Tang, Fei, Zhang, Jun, & Jiang, Huaiguang. Optimal Power Scheduling for a Medium Voltage AC/DC Hybrid Distribution Network. United States. doi:10.3390/su10020318.
Zhu, Zhenshan, Liu, Dichen, Liao, Qingfen, Tang, Fei, Zhang, Jun, and Jiang, Huaiguang. Fri . "Optimal Power Scheduling for a Medium Voltage AC/DC Hybrid Distribution Network". United States. doi:10.3390/su10020318. https://www.osti.gov/servlets/purl/1423191.
@article{osti_1423191,
title = {Optimal Power Scheduling for a Medium Voltage AC/DC Hybrid Distribution Network},
author = {Zhu, Zhenshan and Liu, Dichen and Liao, Qingfen and Tang, Fei and Zhang, Jun and Jiang, Huaiguang},
abstractNote = {With the great increase of renewable generation as well as the DC loads in the distribution network; DC distribution technology is receiving more attention; since the DC distribution network can improve operating efficiency and power quality by reducing the energy conversion stages. This paper presents a new architecture for the medium voltage AC/DC hybrid distribution network; where the AC and DC subgrids are looped by normally closed AC soft open point (ACSOP) and DC soft open point (DCSOP); respectively. The proposed AC/DC hybrid distribution systems contain renewable generation (i.e., wind power and photovoltaic (PV) generation); energy storage systems (ESSs); soft open points (SOPs); and both AC and DC flexible demands. An energy management strategy for the hybrid system is presented based on the dynamic optimal power flow (DOPF) method. The main objective of the proposed power scheduling strategy is to minimize the operating cost and reduce the curtailment of renewable generation while meeting operational and technical constraints. The proposed approach is verified in five scenarios. The five scenarios are classified as pure AC system; hybrid AC/DC system; hybrid system with interlinking converter; hybrid system with DC flexible demand; and hybrid system with SOPs. Results show that the proposed scheduling method can successfully dispatch the controllable elements; and that the presented architecture for the AC/DC hybrid distribution system is beneficial for reducing operating cost and renewable generation curtailment.},
doi = {10.3390/su10020318},
journal = {Sustainability (Basel)},
number = 2,
volume = 10,
place = {United States},
year = {Fri Jan 26 00:00:00 EST 2018},
month = {Fri Jan 26 00:00:00 EST 2018}
}

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