LAPSE

LAPSE:2019.0380
Published Article
LAPSE:2019.0380
A Decentralized Control Method for Distributed Generations in an Islanded DC Microgrid Considering Voltage Drop Compensation and Durable State of Charge
Chul-Sang Hwang, Eung-Sang Kim, Yun-Su Kim
February 27, 2019
This paper presents a decentralized control method for distributed generations (DGs) in an islanded direct current (DC) microgrid. In most typical DC microgrids, a decentralized control method is based on a voltage droop control method. However, the grid voltage differs from node to node due to line voltage drop, and hence the power sharing ratio among DGs cannot be matched with as desired value. Especially in an islanded DC microgrid including an energy storage system as a voltage source, it is difficult for DGs to maintain the charge state of the ESS in a decentralized way. To overcome this problem, state of charge (SOC)-voltage droop control is applied to the ESS. By using the proposed droop method, the SOC information can be assigned to the grid voltage, and hence the other DGs are able to support the SOC in a decentralized way. For DGs to enhance the accuracy of the SOC estimation, voltage drop is compensated for based on forecasting data and line impedance data. The simulation is modeled and implemented using Power System Computer Aided Design/Electromagnetic Transients for DC (PSCAD/EMTDC, version 4.2, Winnipeg, Manitoba, Canada) and the simulation results show that the capability to maintain SOC as well as the system voltage profile are improved by using the proposed method.
Keywords
decentralized control, durable state of charge (SOC), islanded DC microgrid, voltage drop compensation
Suggested Citation
Hwang CS, Kim ES, Kim YS. A Decentralized Control Method for Distributed Generations in an Islanded DC Microgrid Considering Voltage Drop Compensation and Durable State of Charge. (2019). LAPSE:2019.0380
Author Affiliations
Hwang CS: Korea Electrotechnology Research Institute, Changwon 51543, Korea
Kim ES: Korea Electrotechnology Research Institute, Changwon 51543, Korea
Kim YS: Korea Electrotechnology Research Institute, Changwon 51543, Korea
[Login] to see author email addresses.
Journal Name
Energies
Volume
9
Issue
12
Article Number
E1070
Year
2016
Publication Date
2016-12-16
Published Version
ISSN
1996-1073
Version Comments
Original Submission
Other Meta
PII: en9121070, Publication Type: Journal Article
Record Map
Published Article

LAPSE:2019.0380
This Record
External Link

doi:10.3390/en9121070
Publisher Version
Download
Files
[Download 1v1.pdf] (2.1 MB)
Feb 27, 2019
Main Article
License
CC BY 4.0
Meta
Record Statistics
Record Views
40
Version History
[v1] (Original Submission)
Feb 27, 2019
 
Verified by curator on
Feb 27, 2019
This Version Number
v1
Citations
Most Recent
This Version
URL Here
http://psecommunity.org/LAPSE:2019.0380
 
Original Submitter
Calvin Tsay
Links to Related Works
Directly Related to This Work
Publisher Version