Enhancing Doubly Fed Induction Generator Low-Voltage Ride-through Capability Using Dynamic Voltage Restorer with Adaptive Noise Cancellation Technique

Mohamed Adel Ahmed,Emad M Ahmed,Tarek Kandil

doi:10.3390/su14020859

Abstract

Some of the major challenges facing micro-grids (MGs) during their connection with the utility grid are maintaining power system stability and reliability. One term that is frequently discussed in literature is the low-voltage ride-through (LVRT) capability, as it is required by the utility grid to maintain its proper operation and system stability. Furthermore, due to their inherent advantages, doubly fed induction generators (DFIGs) have been widely installed on many wind farms. However, grid voltage dips and distortion have a negative impact on the operation of the DFIG. A dynamic voltage restorer (DVR) is a commonly used device that can enhance the LVRT capability of DFIG compared to shunt capacitors and static synchronous compensator (STATCOM). DVR implements a series compensation during fault conditions by injecting the proper voltage at the point of common coupling (PCC) in order to preserve stable terminal voltage. In this paper, we propose a DVR control method based on the adaptive noise cancelation (ANC) technique to compensate for both voltage variation and harmonic mitigation at DFIG terminals. Additionally, we propose an online control of the DC side voltage of the DVR using pulse width modulation (PWM) rectifier to reduce both the size of the storage element and the solid-state switches of the DVR, aiming to reduce its overall cost. A thorough analysis of the operation and response of the proposed DVR is performed using MATLAB/SIMULINK under different operating conditions of the grid. The simulation results verify the superiority and robustness of the proposed technique to enhance the LVRT capability of the DFIG during system transients and faults.

Highlights

Introduction published maps and institutional affilSince the early 1990s, the major power and utility companies have been facing many challenges because of the huge growth in electrical power consumption resulting from the increased population and their increasing inability to supply energy through existing transmission systems
Three main parameters of the dynamic voltage restorer (DVR) are controlled simultaneously to enable the proper choice of the switches voltage rating and storage element size; they are DC link voltage rating, the percentage sag in power system and the size of the DC link capacitor
We propose an low-voltage ride-through (LVRT) enhancement technique for a doubly fed induction generators (DFIGs)-based wind turbine using a DVR topology

Summary

Introduction

Since the early 1990s, the major power and utility companies have been facing many challenges because of the huge growth in electrical power consumption resulting from the increased population and their increasing inability to supply energy through existing transmission systems. Environmental considerations have obliged electrical system designers to provide safer, reliable and less polluted energy systems. The use of renewable energy resources (RES) is gaining great interest to meet these challenges [1]. According to the National Saudi Vision 2030, the production of electricity from RES will exceed 50% of the total country’s production [5]. The increased use of RES and conventional distributed generators (DGs) have introduced the concept of micro-grids (MGs), which iations

Methods

Results

Conclusion