Distributed PV Bearing Capacity Assessment Method Based on Source–Load Coupling Scenarios

Yalu Sun, Zhou Wang, Yongcheng Liu, Yi Jiang and Yalong Li ()
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Yalu Sun: Economic and Technological Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730000, China
Zhou Wang: Economic and Technological Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730000, China
Yongcheng Liu: Economic and Technological Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730000, China
Yi Jiang: School of Mechanical and Electrical Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
Yalong Li: School of Mechanical and Electrical Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China

Energies, 2025, vol. 18, issue 20, 1-22

Abstract: To address the insufficient consideration of system static voltage stability and PV–load coupling in distributed photovoltaic (PV) hosting capacity assessment, this study first investigates the impact of distributed PV integration on power system transient voltage stability based on a typical power supply system. Building on this analysis, we propose a Static Grid Stability Margin (SGSM) index. Subsequently, leveraging historical PV and load data, the copula function is introduced to establish a joint distribution function characterizing their correlation. Massive evaluation scenarios are generated through sampling, with robust clustering methods employed to form representative evaluation scenarios. Finally, a distributed PV bearing capacity assessment model is established with the objectives of maximizing PV bearing capacity, optimizing economic efficiency, and enhancing static voltage stability. Through simulation verification, the power system has a higher capacity for distributed PV when distributed PV is integrated into nodes with weak static voltage stability and a decentralized integration scheme is adopted.

Keywords: distributed photovoltaic; bearing capacity assessment; source–load coupling; static voltage stability (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
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