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

He，Yufei1; Wang，Minghao1; Jia，Youwei2; Zhao，Jian3; Xu，Zhao1

2020-10-26

10.1049/iet-rpg.2019.1101

IET Renewable Power Generation   影响因子和分区

1752-1416

1752-1424

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.

power generation control power grids photovoltaic power systems power distribution control invertors photovoltaic generation low-voltage distribution network photovoltaic energy power grids system instability low-voltage ride-through control PV systems resistive line impedances active current injection grid voltage support LVRT control scheme PV grid-forming inverter PV energy harvesting reactive current injection grid codes multimode control modes DC-link voltage self-adjustable control structure grid resilience PV microinverter voltage support capability MATALB Simulink hardware experiments

SCI ; EI

英语

其他

Hong Kong Research Grants Council (RGC)[T23-701/14N] ; National Natural Science Foundation of China[71971183]

Science & Technology - Other Topics ; Energy & Fuels ; Engineering

Green & Sustainable Science & Technology ; Energy & Fuels ; Engineering, Electrical & Electronic

WOS:000591880500019

INST ENGINEERING TECHNOLOGY-IET

20204509452341

System stability ; Energy harvesting ; Electric power transmission networks ; Voltage distribution measurement

Energy Conversion Issues:525.5 ; Electric Power Transmission:706.1.1 ; Data Processing and Image Processing:723.2 ; Electric Variables Measurements:942.2 ; Systems Science:961

2-s2.0-85094919545

Scopus

1.Department of Electrical Engineering and Research Institute for Smart Energy,Hong Kong Polytechnic University,Kowloon,Hong Kong
2.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,China
3.College of Electrical Engineering,Shanghai University of Electric Power,Shanghai,China

He，Yufei,Wang，Minghao,Jia，Youwei,et al. Low-voltage ride-through control for photovoltaic generation in the low-voltage distribution network[J]. IET Renewable Power Generation,2020,14(14):2727-2737.

He，Yufei,Wang，Minghao,Jia，Youwei,Zhao，Jian,&Xu，Zhao.(2020).Low-voltage ride-through control for photovoltaic generation in the low-voltage distribution network.IET Renewable Power Generation,14(14),2727-2737.

He，Yufei,et al."Low-voltage ride-through control for photovoltaic generation in the low-voltage distribution network".IET Renewable Power Generation 14.14(2020):2727-2737.