Concurrent unity power factor and constant mutual flux control for PMSG-WT MPPT

2020 ◽  
pp. 0309524X2096887
Author(s):  
Nadia A Elsonbaty ◽  
Mohamed A Enany ◽  
Mahmoud Elymany
Keyword(s):  
Power Factor ◽  
Synchronous Generator ◽  
Control Technique ◽  
Constant Current ◽  
Unity Power Factor ◽  
Point Tracking ◽  
Simulation Testing ◽  
Energy Transducer ◽  
Power Point ◽  
Stator Flux

In this paper, a new concurrent unity power factor and constant stator flux linkage (UPF-CFL) control is presented. The main goal of this technique is to introduce the Permanent Magnet Synchronous Generator (PMSG) as an optimal wind energy transducer. The handled generator load angle and back EMF control achieve the optimum requirements for wind applications namely Maximum Power Point Tracking (MPPT). To do this, both UPF and CFL are integrated into one control methodology to obtain the advantages of each one. While the first well utilizes the apparent power increasing the generator side converter capability, the second protects the generator against magnetic saturation to enable higher speed operation. Mathematical model based on constant current fed equivalent circuit is presented taking the constraints of each individual control algorithm into account. The concurrent performance characteristics are presented and compared with each of concurrent separated algorithm characteristics for assessments. The control technique is implemented and finally, simulation testing is provided for evaluation.

scholarly journals Power factor control in a wind energy conversion system via synchronous generator excitation

2021 ◽  
Author(s):  
Murad Jafari
Keyword(s):  
Power Factor ◽  
Synchronous Generator ◽  
Maximum Power Point ◽  
Wind Energy Conversion ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Energy Conversion System ◽  
Power Point ◽  
Grid Side ◽  
And Control

For high power wind turbines current sources converter (CSC) topologies offer favourable features such as a simple structure, grid friendly waveforms, and reliable grid short circuit protection. Several topologies have been proposed to achieve maximum power point tracking (MPPT) in a wind energy conversion system (WECS) and control the output power factor within a wide range of wind speeds. Some of these topologies are reviewed and a novel approach and control strategy is proposed. The proposed system consists of an electrically excited synchronous generator (EESG), a diode rectifier on the generator-side, and a pulse wave modulated (PWM) current source inverter (CSI) on the grid-side. In the proposed control scheme, the diode rectifier does not offer any control freedoms, therefore controlling the output power and the power factor falls on the EESG and the PWM CSI. The generator excitation is controlled according to the wind speed value to improve operation range whereby the desired grid side power factor can be maintained, while the control freedoms of the CSI are used to regulate the power output of the WECS and to perform maximum power point tracking (MPPT). Theoretical analysis was conducted to investigate the feasibility and limits of this approach and the factors affecting it, and computer simulations confirmed the validity of this approach, showing an improved wind speed range where the desired power factor was maintained.

scholarly journals Integral Backstepping Control for Maximum Power Point Tracking and Unity Power Factor of a Three Phase Grid Connected Photovoltaic System

2017 ◽  
Vol 7 (4) ◽  
pp. 1671
Author(s):  
Hicham Bahri ◽  
Mohamed Aboulfatah ◽  
M’hammed Guisser ◽  
Elhassane Abdelmounim ◽  
Mohammed El Malah
Keyword(s):  
Power Factor ◽  
Fast Response ◽  
Maximum Power ◽  
Photovoltaic System ◽  
Atmospheric Conditions ◽  
Unity Power Factor ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

This paper presents a robust control strategy for a grid connected photovoltaic system with a boost converter by using an integral Backstepping method based on a nonlinear state model, which guarantees the Lyapunov stability of the global system. The system has tracked precisely the maximum power point, with a very fast response and the unit power factor has been observed under different atmospheric conditions. Moreover, the best advantage of the controller is that it’s a good corrector of the grid perturbation and system parameter disturbance. The simulation result has demonstrated the performance of this strategy.

Nonlinear Predictive Control for Maximum Power Point Tracking and Unity Power Factor of a Three Phase Grid Connected PV System

2018 ◽  
Vol 11 (3) ◽  
pp. 133
Author(s):  
Mohammed El Malah ◽  
Abdellfattah Ba-razzouk ◽  
M’hammed Guisser ◽  
Elhassane Abdelmounim ◽  
Mhamed Madark ◽  
...  
Keyword(s):  
Predictive Control ◽  
Power Factor ◽  
Unity Power Factor ◽  
Pv System ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Nonlinear Predictive Control ◽  
Three Phase ◽  
Power Point

scholarly journals Power factor control in a wind energy conversion system via synchronous generator excitation

2021 ◽  
Author(s):  
Murad Jafari
Keyword(s):  
Power Factor ◽  
Synchronous Generator ◽  
Maximum Power Point ◽  
Wind Energy Conversion ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Energy Conversion System ◽  
Power Point ◽  
Grid Side ◽  
And Control

For high power wind turbines current sources converter (CSC) topologies offer favourable features such as a simple structure, grid friendly waveforms, and reliable grid short circuit protection. Several topologies have been proposed to achieve maximum power point tracking (MPPT) in a wind energy conversion system (WECS) and control the output power factor within a wide range of wind speeds. Some of these topologies are reviewed and a novel approach and control strategy is proposed. The proposed system consists of an electrically excited synchronous generator (EESG), a diode rectifier on the generator-side, and a pulse wave modulated (PWM) current source inverter (CSI) on the grid-side. In the proposed control scheme, the diode rectifier does not offer any control freedoms, therefore controlling the output power and the power factor falls on the EESG and the PWM CSI. The generator excitation is controlled according to the wind speed value to improve operation range whereby the desired grid side power factor can be maintained, while the control freedoms of the CSI are used to regulate the power output of the WECS and to perform maximum power point tracking (MPPT). Theoretical analysis was conducted to investigate the feasibility and limits of this approach and the factors affecting it, and computer simulations confirmed the validity of this approach, showing an improved wind speed range where the desired power factor was maintained.

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