NDLI: Low-voltage ride-through control for photovoltaic generation in the low-voltage distribution network

Content Provider	IET Digital Library
Author	He, Yufei Wang, Minghao Jia, Youwei Zhao, Jian Xu, Zhao
Abstract	The increasing penetration of photovoltaic (PV) energy in power grids will impose system instability issues, especially in the occurrence of faults. However, very limited research has been conducted on the low-voltage ride-through (LVRT) control of PV systems in the low-voltage distribution networks (LVDNs) with predominantly resistive line impedances. To fulfil this remaining gap, the effects of active current injection (ACI) on the grid voltage support in LVDN is mathematically analysed in this study. Subsequently, a novel LVRT control scheme for the PV grid-forming inverter is proposed, where the control distinguishes itself from other existing methods due to its optimisation of ACI and PV energy harvesting with the premise of system safety and specified reactive current injection as per grid codes. Multi-mode control modes are involved in the proposed method for dealing with different environmental conditions and voltage dips. Meanwhile, the DC-link voltage is adaptively operated in a self-adjustable control structure for improving grid resilience. The effectiveness of the proposed control method is verified by simulations in MATALB Simulink and hardware experiments on a PV microinverter. Compared with the traditional LVRT control, the post-fault power recovery and voltage support capability can be significantly improved.
Starting Page	2727
Ending Page	2737
Page Count	11
ISSN	17521416
Volume Number	14
e-ISSN	17521424
Issue Number	Issue 14, Oct (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/14/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.1101
Journal	IET Renewable Power Generation
Publisher Date	2020-08-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Current Injection Control of Electric Power System DC-link Voltage Distribution Network Grid Code Grid Resilience Grid Voltage Support Hardware Experiments Invertors Low-voltage Distribution Network Low-voltage Ride-through Control LVRT Control Scheme MATALB Simulink Multimode Control Mode Photovoltaic Energy Photovoltaic Generation Photovoltaic Power System Power Distribution Control Power Electronics Power Generation Control Power Grid Power Supply Power System Control PV Energy Harvesting PV Grid-forming Inverter PV Microinverter PV System Reactive Current Injection Resistive Line Impedance Self-adjustable Control Structure Solar Power Stations Supervisory Circuit System Instability Voltage Support Capability
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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