A Three Sample Based PLL-Less Hysteresis Current Control and Stability Analysis of a Single-Phase Active Distribution System

Project Code :TEPGPS189

Objective

The main objective of this project is to improve the performance of the system during varying grid conditions such as voltage sag, swell and frequency swing.

Abstract

In this project, a computationally simple strategy by using three samples-based technique for a grid-connected inverter in a single-phase active distribution system is explained. The proposed control is to improve performance during varying grid conditions such as voltage sag, swell and frequency swing. 

A comparative analysis between the proposed controller and the conventional Second Order Generalized Integrator (SOGI) PLL based controller for dynamic grid conditions in weak grid scenario has been presented. Additionally, a frequency domain analysis via describing function method is used to model the dynamics of non-linear hysteresis current controller to analyze the closed-loop stability of the system.

Keywords: Point of Common Coupling (PCC), Low Tension (LT), Medium Voltage (MV), Distribution Transformer (DT), Voltage Source Converter (VSC), Phase Locked Loop (PLL), Low Voltage Ride Through (LVRT), Fault Ride Through (FRT), Second Order Generalized Integrator (SOGI).

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 motors.
  • Introduction to Power Distribution Systems
  • Introduction to Solar Power System
  • Introduction to MPPT
  • Introduction to Point of Common Coupling (PCC)
  • Introduction to power electronics converters
  • Introduction to Phase Locked Loop (PLL)’s
  • Introduction to Low Voltage Ride Through (LVRT)
  • Introduction to Distribution Transformers (DT)
  • Introduction to Fault Ride Through(FRT),
  • Design of Second order generalized integrator (SOGI) PLL.
  • How to implement VSC control?
  • We can learn about the distribution systems
  • Introduction to open loop and closed loop control system
  • Introduction to Boost Converter.
  • Introduction to Voltage Source Converters (VSC)
  • We can learn about RC Filters, Low Pass Filters.
  • We can learn about PI and Hysteresis Controllers
  • 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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