Transient Stability Control Method for Droop-Controlled Photovoltaics, Based on Power Angle Deviation Feedback

Youzhuo Zheng, Zekun Xiao, Long Hua, Qi Guo (), Chun Li and Kailei Chen
Additional contact information
Youzhuo Zheng: Electric Power Research Institute of Guizhou Power Grid Co., Ltd., Guiyang 550002, China
Zekun Xiao: The Collage of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Long Hua: Electric Power Research Institute of Guizhou Power Grid Co., Ltd., Guiyang 550002, China
Qi Guo: The Collage of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Chun Li: Electric Power Research Institute of Guizhou Power Grid Co., Ltd., Guiyang 550002, China
Kailei Chen: Electric Power Research Institute of Guizhou Power Grid Co., Ltd., Guiyang 550002, China

Energies, 2025, vol. 18, issue 19, 1-15

Abstract: Distributed photovoltaic grid-connected converters adopting droop control can provide dual support for voltage and frequency in the distribution system. However, under fault conditions, droop-controlled inverters will face the problem of transient synchronization instability, and their transient characteristics are significantly affected by fault conditions, control parameter configurations, and other factors. Nevertheless, at present, the transient operation boundaries of droop inverters, considering key sensitive parameters, are unclear, and the transient stability control mechanism is lacking, which poses a threat to the safe and stable operation of distributed photovoltaic systems. To this end, this paper fully considers the influences of control parameters and fault severity and conducts a multidimensional quantitative characterization of the transient stability boundaries of droop-controlled inverters. Furthermore, a stability enhancement control structure for droop-controlled inverters, based on power angle deviation feedforward, is proposed, and an adaptive configuration method for feedforward coefficients is put forward to ensure the safe and stable operation of droop inverters at different fault sag depths. Finally, the accuracy of the theoretical analysis and the proposed control structure is verified through simulations and experiments.

Keywords: droop-controlled inverter; phase plane diagram; transient stability boundaries; power angle deviation feedforward control (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: Add references at CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/19/5126/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/19/5126/ (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:19:p:5126-:d:1759071

Access Statistics for this article

Energies is currently edited by Ms. Cassie Shen

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