Low Voltage Ride through Control Capability of a Large Grid Connected PV System Combining DC Chopper and Current Limiting Techniques

This paper presents the development and performance capability of a comprehensive Low voltage ride through (LVRT) control scheme that makes use of both the DC chopper and the current limiting based on the required reactive power during fault time. The study is conducted on an 8.5 MW single stage PV power plant (PVPP) connected to the Rwandan grid. In the event of fault disturbance, this control scheme helps to overcome the problems of excessive DC-link voltage by fast activation of the DC chopper operation. At the same instance, AC current is limited to the maximum rating of the inverter as a function of the injected reactive current. This helps overcome AC-over- current that may possibly lead to damage or disconnection of the inverter. The control scheme also ensures voltage support and power balance through the injection of reactive current as per grid code requirements. Selected simulations using MATLAB are carried out in the events of different kinds of fault caused voltage dips. Results demonstrate the effectiveness of the proposed LVRT control scheme.

[1]  M. A. Abido,et al.  Grid-connected PV array with supercapacitor energy storage system for fault ride through , 2015, 2015 IEEE International Conference on Industrial Technology (ICIT).

[2]  Ali Q. Al-Shetwi,et al.  Modeling and Control of Grid-Connected Photovoltaic Power Plant With Fault Ride-Through Capability , 2018 .

[3]  I. Erlich,et al.  Modelling and control of photovoltaic inverter systems with respect to German grid code requirements , 2012, 2012 IEEE Power and Energy Society General Meeting.

[4]  M. Z. Sujod,et al.  Grid‐connected photovoltaic power plants: A review of the recent integration requirements in modern grid codes , 2018 .

[5]  M. Z. Sujod,et al.  Low voltage ride-through capability control for single-stage inverter-based grid-connected photovoltaic power plant , 2018 .

[6]  Hassane El Markhi,et al.  LVRT Control Strategy of DFIG based Wind Turbines Combining Passive and Active Protection , 2017 .

[7]  Staffan Norrga,et al.  Grid integration aspects of large solar PV installations: LVRT capability and reactive power/voltage support requirements , 2011, 2011 IEEE Trondheim PowerTech.

[8]  Sabah Mashaly,et al.  Low voltage ride through and fault ride through capability of 40kw PV model grid connected , 2016, 2016 Saudi Arabia Smart Grid (SASG).

[9]  Ab Halim Abu Bakar,et al.  Strategy to enhance the low-voltage ride-through in photovoltaic system during multi-mode transition , 2017 .

[10]  Ahmed Masmoudi,et al.  MATLAB/Simulink Based Modelling of Solar Photovoltaic Cell , 2012 .

[11]  Xiaodong Liang,et al.  Emerging Power Quality Challenges Due to Integration of Renewable Energy Sources , 2016, IEEE Transactions on Industry Applications.

[12]  Marcelo Gradella Villalva,et al.  Comprehensive Approach to Modeling and Simulation of Photovoltaic Arrays , 2009, IEEE Transactions on Power Electronics.

[13]  Prakash Kumar Hota,et al.  Fault Analysis of Grid Connected Photovoltaic System , 2016 .

[14]  G. Vitale,et al.  Comparison of power quality impact of different photovoltaic inverters: the viewpoint of the grid , 2004, 2004 IEEE International Conference on Industrial Technology, 2004. IEEE ICIT '04..

[15]  Kyo-Beum Lee,et al.  Fault diagnosis and fault-tolerant control of a dc-link voltage sensor for PV inverters , 2012, Proceedings of The 7th International Power Electronics and Motion Control Conference.

[16]  Ramli Noor Lina,et al.  A REVIEW OF THE FAULT RIDE THROUGH REQUIREMENTS IN DIFFERENT GRID CODES CONCERNING PENETRATION OF PV SYSTEM TO THE ELECTRIC POWER NETWORK , 2015 .

[17]  Yung-Ruei Chang,et al.  Reactive Power Control of Three-Phase Grid-Connected PV System During Grid Faults Using Takagi–Sugeno–Kang Probabilistic Fuzzy Neural Network Control , 2015, IEEE Transactions on Industrial Electronics.

[18]  Ali Q. Al-Shetwi,et al.  Modeling and dynamics study of large scale PV system connected Malaysian grid under different fault conditions , 2016, 2016 International Conference on Advances in Electrical, Electronic and Systems Engineering (ICAEES).