Design and implementation of fuzzy logic based modified real-reactive power control of inverter for low voltage ride through enhancement in grid connected solar PV system

Project Code :TEPGCS23

Objective

Main objective of this project is to stabilize the grid voltage by injecting reactive current and limit the grid over current by reducing active power flow into the grid. To regulate the overshoot in dc link voltage during grid faults.

Abstract

In this project,  grid connected solar PV system, during grid faults, increase in grid current, dip in voltage at point of common coupling and overshoot in dc link voltage in the inverter side are observed. The solar PV system gets disconnected from the grid whenever the grid voltage goes below a certain nominal value in order to safeguard the cascaded power converter systems from high currents and over voltages. 

This paper proposes an intelligent fuzzy based real and reactive power control of inverter for effective Low Voltage Ride Through (LVRT) capability during grid faults. 

The proposed fuzzy logic based modified inverter real and reactive power control strategy stabilizes the grid voltage by injecting reactive current and limits the grid over current by reducing active power flow into the grid. To regulate the overshoot in dc link voltage during grid faults, a braking chopper and dynamic braking resistor strategies are included in the proposed LVRT scheme.

Keywords: DC link regulation, Low-Voltage Ride-Through, Boost Converter, Fuzzy Logic Controller

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 / 4 GB (Min)

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 solar power generation
  • Introduction to power electronics converters
  • Introduction to  phase locked loop (PLL)
  • Introduction to PWM techniques
  • Introduction to Fuzzy Logic Controllers
  • Design of PLL
  • Introduction to Inverters
  • Introduction to parks transformation
  • Introduction to Clarks transformation
  • Introduction to Sinusoidal Pulse Width Modulation
  • Design of battery energy storage system
  • Design of solar PV system
  • Design of MPPT controller
  • Design of DC – DC boost converter
  • Design of bidirectional DC -DC converter
  • Design of Voltage source converter
  • We can learn about the generation of gate pulses to the converter
  • We can learn about the bidirectional DC -DC converter operation
  • Introduction to open loop and closed loop control system
  • We can learn about the difference between both grid connected and islanded modes
  • Design of Sinusoidal Pulse Width Modulation
  • Introduction to controllers
  • Design of PI controller
  • 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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