scholarly journals Descending Viewer Method for Fault Tolerant Control

2018 ◽  
Vol 7 (3) ◽  
pp. 199
Author(s):  
K. Lenin
Keyword(s):  
Fault Tolerant ◽  
Short Circuit ◽  
Fault Tolerant Control ◽  
Doubly Fed Induction Generator ◽  
Strong Condition ◽  
Induction Generators ◽  
Doubly Fed Induction Generators ◽  
Rotor Resistance ◽  
Simulation Results ◽  
Doubly Fed

<span lang="EN-US">In this paper Descending Viewer Method (DVM) projected for finding and fault tolerant control of stator inter-turn short circuit faults in doubly-fed induction generators based in wind turbine. A process has been developed that allows the way from ostensible controllers designed for strong condition, to vigorous controllers designed for defective condition. Finally value of the rotor resistance estimated &amp; is based on the use of the error between real and probable value of doubly fed induction generator (DFIG) in faulty condition, this will perk up the performance of this viewer. Simulation results show the reliability of the proposed Descending Viewer Method (DVM) approach.</span>

scholarly journals Improving the Performance of Doubly Fed Induction Generator Using Fault Tolerant Control—A Hierarchical Approach

2020 ◽  
Vol 10 (3) ◽  
pp. 924 ◽  
Author(s):  
Muhammad Shahzad Nazir ◽  
Yeqin Wang ◽  
Ali Jafer Mahdi ◽  
Xinguo Sun ◽  
Chu Zhang ◽  
...  
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Fault Tolerant ◽  
Short Circuit ◽  
Fault Tolerant Control ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Hierarchical Approach ◽  
Dc Voltage ◽  
Doubly Fed

The growth of using wind energy on a large scale increases the demand for wind energy conversion machines (WECMs), among these converters, the doubly-fed induction generator (DFIG) is the favorite choice. However, DFIG is very sensitive to wind speed variations and grid faults during operation. In order to overcome these undesirable characteristics, this paper proposes a hierarchical fault tolerant control (FTC) to improve the performance of DFIG. The hierarchical fault tolerant control (FTC) approach consists of pitch angle control (PAC) and maximum power point tracking (MPPT). This hierarchical approach demonstrates the robust response under various (low, rated, and high) wind speed ranges and reduces the undesirable DC voltage overshoots during short-circuit disorder. The simulation results are summarized in a logical table, which depicts the order of controlling scheme and operation for a sustainable energy generation system. The proposed control scheme achieved the healthy and the robust dynamic response without deteriorating the grid power quality or stressing the converters, and approved the effectiveness to suppress the DC voltage overshoots and tolerate the lower down short-circuit disorder to its rated range.

Study on operating modes of doubly fed induction generator with a short circuit fault on grid near the wind power plant

2021 ◽  
Vol 15 (1) ◽  
pp. 37-44
Author(s):  
Thai Hiep Le ◽  
◽  
Duong Hoang Phuc Tran
Keyword(s):  
Power Plant ◽  
Short Circuit ◽  
Active Power ◽  
Induction Generator ◽  
Wind Power Plant ◽  
Doubly Fed Induction Generator ◽  
Power Characteristic ◽  
Simulation Results ◽  
Doubly Fed ◽  
Short Circuit Fault

In this paper, the operating mode of a doubly fed induction generator (DFIG) wind turbine is studied in order to evaluate its fault ride-through and transient stability with a grid’s short circuit fault at near the wind power plant. Based on the structure of DFIG, external resistors are directly connected to rotor windings, then the generator operates as a wound rotor induction generator (WRIG) when there is a short circuit fault on the grid. According to the simulation results in Matlab, the active power is consumed on the crowbar resistor, causing the active power characteristic of generator is changed from high to low. As a result, the amount of excess mechanical energy is not much, so the generator be not accelerated significantly. These simulation results show that it is appropriate to use the crowbar resistor to change the power characteristic of the DFIG. Thanks to this change, the generator is still connected to the grid, stable operation both during and after a short circuit.

scholarly journals The Fuzzy Control for Rotor Flux Orientation of the double-fed asynchronous generator Drive

2014 ◽  
Vol 13 (8) ◽  
pp. 4707-4722 ◽  
Author(s):  
Mohammed TAOUSSI ◽  
Mohammed KARIM ◽  
Badre BOSSOUFI ◽  
Ahmed LAGRIOUI ◽  
Mohammed EL MAHFOUD
Keyword(s):  
Electrical Machine ◽  
Fuzzy Approach ◽  
Induction Generators ◽  
Doubly Fed Induction Generators ◽  
Asynchronous Generator ◽  
Rotor Flux ◽  
Machine Control ◽  
Simulation Results ◽  
Doubly Fed ◽  
Control Direction

In This paper we present a new contribution of fuzzy logic for electrical machine control. We are interested to the control direction of the rotor flux applied to Doubly-Fed Induction Generators (DFIG)At first, the principle of operation and modeling are applied to the DFIG is developed and introduced. Thereafter, the Fuzzy approach is applied to the FOC control, to improve the performance of the machines.Finally, the simulation results of the two commands are validates on the environment Matlab / Simulink followed by a detailed analysis.

scholarly journals Grid-Synchronization Stability Analysis for Multi DFIGs Connected in Parallel to Weak AC Grids

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4361 ◽  
Author(s):  
Dong Wang ◽  
Yunhui Huang ◽  
Min Liao ◽  
Guorong Zhu ◽  
Xiangtian Deng
Keyword(s):  
Short Circuit ◽  
State Space Model ◽  
Detailed Model ◽  
Reduced Order ◽  
Grid Synchronization ◽  
Induction Generators ◽  
Doubly Fed Induction Generators ◽  
Doubly Fed ◽  
The Stability ◽  
Stability Issues

Recent works have shown that phase-locked loop (PLL) synchronized wind turbines (WTs) suffer stability issues when integrated into weak grids. However, most of the current studies are limited to a single machine case, the interactions among the WTs are usually overlooked. This paper studies the stability of multiple doubly-fed induction generators (DFIGs) that are connected in parallel to a weak AC grid. A state space model of a two-DFIG system is firstly presented. Subsequently, eigenvalue sensitivity analysis shows that instability can occur at low short-circuit ratio (SCR) or heavy loading conditions. Meanwhile, participation factor analysis implies that the unstable mode is primarily induced by the interactions between the PLLs of the two WTs. Further, to make out how the PLLs interact to cause instability, a reduced-order model is proposed for analysis simplicity, and an explanation in terms of transfer function residue is given for illustration. Detailed model-based time domain simulations are conducted to validate the analyses’ results.

Variable-speed Wind Turbines with Doubly-fed Induction Generators Part II: Power System Stability

2002 ◽  
Vol 26 (3) ◽  
pp. 171-188 ◽  
Author(s):  
Vladislav Akhmatov
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Short Circuit ◽  
Power Grid ◽  
System Stability ◽  
Variable Speed ◽  
Electrical Currents ◽  
Induction Generators ◽  
Doubly Fed Induction Generators ◽  
Doubly Fed

This article describes the second part of a larger investigation of dynamic interaction between variable-speed wind turbines equipped with doubly-fed induction generators (DFIG) and the power grid. A simulation model is applied for dynamic stability investigations, with the entire power grid subjected to a short-circuit fault. During the grid disturbances, the DFIG converter is found to be the most sensitive part of the wind turbine. Therefore the electrical currents are determined using the transient generator model. The converter action is crucial for wind turbine operation associated with such disturbances, especially regarding tripping or uninterrupted operation.

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