Voltage Estimation Method for Power Distribution Networks Using High-Precision Measurements

Chan-Hyeok Oh, Seok-Il Go, Joon-Ho Choi, Seon-Ju Ahn and Sang-Yun Yun
Additional contact information
Chan-Hyeok Oh: Department of Electrical Engineering in Chonnam National University, Gwangju 61186, Korea
Seok-Il Go: Department of Electrical Engineering in Chonnam National University, Gwangju 61186, Korea
Joon-Ho Choi: Department of Electrical Engineering in Chonnam National University, Gwangju 61186, Korea
Seon-Ju Ahn: Department of Electrical Engineering in Chonnam National University, Gwangju 61186, Korea
Sang-Yun Yun: Department of Electrical Engineering in Chonnam National University, Gwangju 61186, Korea

Energies, 2020, vol. 13, issue 9, 1-23

Abstract: In this study, we propose a voltage estimation method for the radial distribution network with distributed generators (DGs) using high-precision measurements (HPMs). The proposed method uses the section loads center for voltage estimation because individual loads are not measured in the distribution system. The bus voltage was estimated through correction of the section load center by using an HPM at the end of the main feeder. The correction parameter of the section load center was calculated by comparing the initial voltage estimates and the measurements of the HPMs. After that, the voltage of the main feeder was re-estimated. Finally, the bus voltage in the lateral feeder was estimated based on the voltage estimates in the main feeder and the current measurements in the lateral feeder. The accuracy of the proposed algorithm was verified through case studies by using test systems implemented in MATLAB, Simulink, and Python environments. In order to verify the utilization of the proposed method to the practical system, a test with injection of approximately 5% of normally distributed random noise was performed. Through the results of the case studies, when an HPM is installed at the end of the main feeder, it demonstrated that the voltage estimation accuracy can be greatly improved by the proposed method. Compared with the existing methods, the proposed method was less affected by PV and showed robustness to measurement noise.

Keywords: voltage estimation; section load center; high-precision measurement; radial distribution network (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1996-1073/13/9/2385/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/9/2385/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:9:p:2385-:d:356223

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().