干旱区生态环境知识资源中心(Arid): The Dual-Mode Combined Control Strategy for Centralized Photovoltaic Grid-Connected Inverters Based on Double-Split Transformers

Arid

DOI	10.1109/TIE.2020.3044799
	The Dual-Mode Combined Control Strategy for Centralized Photovoltaic Grid-Connected Inverters Based on Double-Split Transformers
	Li, Ming; Zhang, Xing; Guo, Zixuan; Wang, Jilei; Li, Fei
通讯作者	Li, F (corresponding author), Hefei Univ Technol, Sch Elect Engn & Automat, Natl & Local Joint Engn Lab Renewable Energy Acce, Hefei 230009, Peoples R China.
来源期刊	IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
ISSN	0278-0046
EISSN	1557-9948
出版年	2021
卷号	68 期号:12 页码:12322-12330
英文摘要	Centralized photovoltaic (PV) grid-connected inverters (GCIs) based on double-split transformers have been widely used in large-scale desert PV plants. However, due to the large fluctuation of short circuit ratio (SCR) under high-penetration PV power plants, the stability of GCIs controlled in current source mode (CSM) is seriously affected. Reducing the bandwidth of the phase-locked loop (PLL) will improve the stability of CSM-controlled GCI, but the dynamic response performance will be degraded. Even if the PLL bandwidth is designed to be very low, the CSM-controlled GCI still cannot operate stably in very weak grids. The voltage source mode (VSM) controlled GCI can operate stably in very weak grids, but is not suitable for strong grids. Therefore, this article proposes a dual-mode combined control strategy: When SCR gradually decreases, the GCIs operate in full CSM (FCSM), hybrid mode (HM), and full VSM (FVSM) in turn, which effectively improves the stability of GCIs when SCR fluctuates greatly. The stability region of GCIs under the constraints of multiperformance-index is obtained, and the switching boundaries between the above three modes are also quantitatively analyzed in this article. Finally, the correctness of the proposed control strategy is verified by experiments.
英文关键词	Power system stability Stability criteria Switches Circuit stability Voltage control Phase locked loops Impedance Current source mode (CSM) grid-connected inverter (GCI) short circuit ratio (SCR) stability region voltage source mode (VSM)
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000692884200066
WOS关键词	POWER CONVERTER ; STABILITY ; FEEDFORWARD ; SYSTEMS
WOS类目	Automation & Control Systems ; Engineering, Electrical & Electronic ; Instruments & Instrumentation
WOS研究方向	Automation & Control Systems ; Engineering ; Instruments & Instrumentation
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363570
作者单位	[Li, Ming; Zhang, Xing; Guo, Zixuan; Wang, Jilei; Li, Fei] Hefei Univ Technol, Sch Elect Engn & Automat, Natl & Local Joint Engn Lab Renewable Energy Acce, Hefei 230009, Peoples R China
推荐引用方式 GB/T 7714	Li, Ming,Zhang, Xing,Guo, Zixuan,et al. The Dual-Mode Combined Control Strategy for Centralized Photovoltaic Grid-Connected Inverters Based on Double-Split Transformers[J],2021,68(12):12322-12330.
APA	Li, Ming,Zhang, Xing,Guo, Zixuan,Wang, Jilei,&Li, Fei.(2021).The Dual-Mode Combined Control Strategy for Centralized Photovoltaic Grid-Connected Inverters Based on Double-Split Transformers.IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS,68(12),12322-12330.
MLA	Li, Ming,et al."The Dual-Mode Combined Control Strategy for Centralized Photovoltaic Grid-Connected Inverters Based on Double-Split Transformers".IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 68.12(2021):12322-12330.