Low voltage ride-through capability control for single-stage inverter-based grid-connected photovoltaic power plant
Objective
The main objective of this study is to propose a comprehensive control strategy that enables the PVPP to withstand grid faults, to allow the inverter remains connected, to continuously produce electricity, and to absorb excessive energy whilst injecting the required reactive power under various types of fault to meet the standard requirements.
Abstract
The Low Voltage Ride-Through (LVRT) capability is one of the challenges faced by the integration of large-scale Photo Voltaic (PV) power stations into electrical grid which has not been fully investigated. Therefore, this paper presents a comprehensive control strategy of single-stage PV power plant to enhance the LVRT capability based on the Malaysian standards and modern grid codes connection requirements.
The proposed control overcomes the problems of dc-link over-voltage and ac over-current that may cause disconnection or damage to the inverter. For this purpose, dc-chopper brake controller and current limiter are used to absorb the excessive dc-voltage and limits excessive ac current, respectively.
This control strategy can also ensure the reactive power support through the injection of reactive current according to the standard requirements as soon as the voltage sag is detected. Furthermore, to keep the power balance between both sides of the inverter, PV array can generate possible amount of active power according to the rating of grid inverter and voltage sag depth by the operating in different modes.
Keywords: Low voltage ride-through, Grid-connected PV inverter, Voltage sage, Solar energy, Grid code.
NOTE: Without the concern of our team, please don't submit to the college. This Abstract varies based on student requirements.
Block Diagram
Specifications
Software Configuration:
Operating System : Windows 7/8/10
Application Software : Matlab/Simulink
Hardware Configuration:
RAM : 8 GB
Processor : I3 / I5(Mostly prefer)
Learning Outcomes
- Introduction to Matlab/Simulink
- What is EISPACK & LINPACK
- How to start with MATLAB
- About Matlab language
- About tools & libraries
- Application of Matlab/Simulink
- About Matlab desktop
- Features of Matlab/Simulink
- Basics on Matlab/Simulink
- Introduction to wind power generation.
- Introduction to PV system.
- Design of power converters.
- Design of Voltage source converter.
- Design o PLL.
- Design of Solar Cell.
- Design of Grid.
- Design of MPPT method.
- We can learn about the generation of gate pulses to the converter.
- We can learn about different types of PWM techniques.
- We can learn about Low voltage Ride through.
- Introduction to controllers.
- Design of PI controller.
- Introduction to open loop and closed loop control system.
- We can learn about the Clark’s transformation.
- We can learn about the park’s transformation.
- Project Development Skills:
- Problem analyzing skills
- Problem solving skills
- Creativity and imaginary skills
- Programming skills
- Deployment
- Testing skills
- Debugging skills
- Project presentation skills
- Thesis writing skills
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