Research and Engineering Practice of Var-Voltage Control in Primary and Distribution Networks Considering the Reactive Power Regulation Capability of Distributed PV Systems

Haiyun Wang, Qian Chen, Linyu Zhang, Xiyu Yin, Zhijian Zhang, Huayue Wei and Xiaoyue Chen ()
Additional contact information
Haiyun Wang: State Grid Beijing Electric Power Company Electric Power Scientific Research Institute, Beijing 100075, China
Qian Chen: State Grid Beijing Electric Power Company Electric Power Scientific Research Institute, Beijing 100075, China
Linyu Zhang: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
Xiyu Yin: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
Zhijian Zhang: State Grid Beijing Electric Power Company Electric Power Scientific Research Institute, Beijing 100075, China
Huayue Wei: State Grid Beijing Electric Power Company Electric Power Scientific Research Institute, Beijing 100075, China
Xiaoyue Chen: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China

Energies, 2025, vol. 18, issue 8, 1-17

Abstract: To fully utilize the reactive power resources of distributed photovoltaic (PV) systems, this study proposes a coordinated var-voltage control strategy for the main distribution network, incorporating the reactive power regulation capability of distributed PV. Firstly, the Automatic Voltage Control (AVC) tertiary and secondary voltage control methods and optimization models in the main and distribution networks area are analyzed, and the physical equivalence of the reactive power compensation equipment involved is carried out. In this study, a coordinated local var-voltage control method is proposed, which integrates AVC primary voltage control and divides the control scheme into feeder and station areas, respectively. Through the analysis of actual operation cases in a regional power grid, the results demonstrate a reduction in network loss by 171.14 kW through voltage adjustment, validating the effectiveness of the proposed strategy. This method fully leverages the reactive power regulation capability of distributed renewable energy sources, reduces the operational frequency of reactive power equipment in substations, and synergizes with the AVC system to achieve optimal power grid operation.

Keywords: distributed PV; AVC; reactive power; main and distribution networks; cross-approximation algorithm (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: 2025
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/8/2135/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/8/2135/ (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:18:y:2025:i:8:p:2135-:d:1639029

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 ().