A Tie-Line Fault Ride-Through Strategy for PV Power Plants Based on Coordinated Energy Storage Control

Bo Pan, Feng Xu, Xiangyi Bi, Dong Wan, Zhihua Huang, Jinsong Yang, An Wen and Penghui Shang ()
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Bo Pan: Anji Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd., Huzhou 313300, China
Feng Xu: Zhejiang Anji General Electric Power Development Co., Ltd., Huzhou 313300, China
Xiangyi Bi: Anji Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd., Huzhou 313300, China
Dong Wan: Anji Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd., Huzhou 313300, China
Zhihua Huang: State Grid Huzhou Electric Power Supply Company, Huzhou 313000, China
Jinsong Yang: Anji Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd., Huzhou 313300, China
An Wen: Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
Penghui Shang: Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China

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

Abstract: Unplanned islanding and off-grid issues of photovoltaic (PV) power stations caused by tie-line faults have seriously undermined the power supply reliability and operational stability of PV plants. Furthermore, it takes a relatively long time to restore normal operation after an off-grid event, leading to substantial power losses. To address this problem, this paper proposes a tie-line fault ride-through control strategy based on the coordinated control of on-site energy storage units. After a fault on the tie-line occurs, the control mode of PV inverters is switched to achieve source–load balance, and the control mode of energy storage inverters is switched to VF control mode, which supports the stability of voltage and frequency in the islanded system. Subsequently, the strategy coordinates with the tie-line recloser device to perform synchronous checking and grid reconnection. Simulation results show that, for transient tie-line faults, the proposed method can achieve stable control of the islanded system and grid reconnection within 2 s after a fault on the tie-line occurs. It successfully realizes fault ride-through within the operation time limit of anti-islanding protection, effectively preventing the PV plant from disconnecting from the grid. Finally, a connection scheme for the control strategy of a typical PV plant is presented, providing technical reference for on-site engineering.

Keywords: photovoltaic (PV) power plant; islanding ride-through; energy storage; control strategy (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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