scholarly journals Harmonics Reduction and Reactive Power Injection in Wind Generation Systems

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1964
Author(s):  
Francisco Emilio Rodarte Gutiérrez ◽  
Oscar Carranza Castillo ◽  
Jaime José Rodríguez Rivas ◽  
Rubén Ortega González ◽  
Edgar Peralta Sánchez ◽  
...  
Keyword(s):  
Power Factor ◽  
Reactive Power ◽  
Control Technique ◽  
Wind Generation ◽  
Generation System ◽  
Current Harmonics ◽  
Resonant Controller ◽  
Grid Side ◽  
Wind Generation System ◽  
Grid Side Converter

In this work, methods are implemented to improve two aspects of energy quality in a wind generation system. First, the harmonic reduction is achieved by applying a linear control technique in the Grid Side Converter; and second, the power factor of the wind generation system using a Doubly Fed Induction Generator (DFIG) is adjusted by injecting reactive power. The reduction of the harmonic content is performed with a digital resonant controller, which tracks the periodic signals corresponding to the current harmonics of the Grid Side Converter (GSC), which is part of a “back to back” converter in a wind generation system. This technique allows implementing a current controller of the GSC with a high level of rejection of current harmonics, of frequencies with orders (1 + 6k) and (1 − 6k) (where k is an integer), when executed in the synchronous reference frame (dq). The purpose of this work is to inject currents to the grid with very low harmonic distortion and provide a method for tuning the resonant controller for a simple L filter; also, the GSC is used to generate reactive power. These two improvements achieve a unity power factor, and this is necessary to comply with the new codes where a leading power factor helps regulate the grid voltage.

scholarly journals Power Flow Management in a Wind Generation System Using a Dual Feed Induction Generator

Proceedings ◽  
2018 ◽  
Vol 2 (20) ◽  
pp. 1269
Author(s):  
Pedro Hernández Tenorio ◽  
Jaime José Rodríguez Rivas ◽  
Oscar Carranza Castillo ◽  
Rubén Ortega González ◽  
José Victoriano Chávez Aguilar
Keyword(s):  
Power Flow ◽  
Control Technique ◽  
Wind Generation ◽  
Induction Generator ◽  
Generation System ◽  
Control Loops ◽  
Power Exchange ◽  
Doubly Fed ◽  
Grid Side ◽  
Wind Generation System

The management of the power flow of a wind generation system is presented. This system is made up of a doubly fed induction generator and a Back to Back converter. The analysis focuses on the grid-side converter. The control loops of the current to the grid and the voltage of the DC-Link are designed based on proportional-integral controllers. These controls allow to manage the active and relative power that is injected into the grid. The Converter is simulated in Simulink of Matlab, where its operation as a rectifier and inverter is validated. This is able to be done due to the vector control technique used in the control structure of the wind generation system, in addition an adequate power exchange is obtained between the generator and the grid.

scholarly journals Improving voltage profile of load bus of wind generation system using DSTATCOM

2017 ◽  
Vol 26 (4) ◽  
pp. 81
Author(s):  
Manju Aggarwal ◽  
Madhusudan Singh ◽  
S.K. Gupta
Keyword(s):  
Distribution System ◽  
Voltage Stability ◽  
Reactive Power ◽  
Low Voltage ◽  
Stability Margin ◽  
Wind Generation ◽  
Voltage Profile ◽  
Generation System ◽  
Wind Generation System ◽  
The Impact

In a low voltage distribution system with integrated wind plant, voltage stability is impacted by the large variation of load and wind penetration. The compensators like SVC and DSTATCOM are currently being used to address such issue of voltage instability. This paper analyses the impact of wind penetration and variation of active and reactive power of the load on voltage profile of a wind generation system with and without DSTATCOM. It also analyses the performance of the system during fault by calculating various parameters of the system. It has been demonstrated that voltage stability margin increases using DSTATCOM at different wind penetration levels. This system has been simulated and analysed in MATLAB 2011b using a power system toolbox under steady state and transient conditions.

New control technique for performance improvement of static Kramer induction generator

2016 ◽  
Vol 35 (3) ◽  
Author(s):  
nadia Elsonbaty ◽  
mohamed abdelfattah enany ◽  
mustafa mohamed
Keyword(s):  
Power Factor ◽  
Design Methodology ◽  
Control Strategies ◽  
Control Technique ◽  
Voltage Source ◽  
Induction Generator ◽  
Operating Speed ◽  
Speed Range ◽  
Grid Side ◽  
Grid Side Converter

Purpose This paper presents the mathematical models of Static Kramer Induction Generator (SKIG) that greatly improves its performance to be competitor for wind energy and hydraulic power generation. Design/methodology/approach Two models of control strategies are proposed, the first is to control the imposed rotor voltage, thus an angular relationship between stator voltage and rotor voltage vectors over the operating speed range is established. which may be achieved by regulating the slip of the machine through the Grid Side Converter (GSC) to fix the operating technique. The second one is to control the rotor current via GSC. GSC is a PWM Voltage Source Converter Findings A comparison between the two techniques is given and very good matching is obtained. Both control strategies can be achieved in terms of the GSC firing angle as shown. In addition to the greatly improved power factor. The paper illustrates the availability of extending the operating speed range up to twice of the synchronous speed, however, the speed range must be limited by the GSC ratings to achieve the slip recovery advantage of lowering the interfacing grid converter rating in analogy the system may be applied for electric drives as well. Originality/value The operational advantages of the proposed system can be summarized as follows: 1- The system is capable of increasing the operating speed range up to twice of synchronous speed. For slip energy recovery system the required super synchronous speed range is given by 1/3 synchronous speed. 2- The system provides significant improved power factor controllability over the operating speed range. 3- The system provides controllability for either excitation rotor voltage or rotor current through the firing angle control of the grid side converter. 4- Near constant stator and rotor currents overall the speed range. 5- Near constant magnetization current. 6- Higher efficiency and reliability.

Adaptive Hysteresis Band Current Control (AHB) with PLL of Grid Side Converter-Based Wind Power Generation System

2011 ◽  
Vol 52-54 ◽  
pp. 1911-1916
Author(s):  
You Gui Guo ◽  
Ping Zeng ◽  
Li Juan Li ◽  
Jie Qiong Zhu ◽  
Wen Lang Deng ◽  
...  
Keyword(s):  
Power Generation ◽  
Wind Power ◽  
Reactive Power ◽  
Active Power ◽  
Current Control ◽  
Wind Power Generation ◽  
Generation System ◽  
Power Generation System ◽  
Grid Side ◽  
Grid Side Converter

Adaptive hysteresis band current control(AHB CC) is used to control the three-phase grid currents by means of grid side converter in wind power generation system in this paper. AHB has reached the good purpose with PLL (Lock phase loop). First the mathematical models of each part are given. Then the control strategy of grid side converter-based wind power generation system is given in detail mainly including ABH CC and PI controllers of DC-link voltage, active power, reactive power. Finally the simulation model is set up which consists of power circuits, such as the grid side converter, LCL filter, transformer and grid, and control parts, etc. The simulation results have verified that the control strategy is feasible to fit for control of gird currents, active power, reactive power and DC-link voltage in wind power generation system.

scholarly journals Power Quality Improvement for Stable Operation in Renewable Hybrid Power System using Sapfwith Icosф Control Technique

2019 ◽  
Vol 8 (12) ◽  
pp. 1414-1419
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Reactive Power ◽  
Control Technique ◽  
Voltage Source ◽  
Resonance Problem ◽  
Stable Operation ◽  
Shunt Active Power Filter ◽  
Sinusoidal Waveform ◽  
Grid Side

Nowadays Power quality is a extremely main issue. Switching actions of power electronics devices draws reactive power, which causes distortion in current waveform, resulting in harmonics which further leads to capacitor failure, resonance problem and power factor performance etc. Therefore the harmonics are eliminated and the reactive power is compensated in the power supply in the grid side. Passive filters were previously used for removal of harmonics, but due to large resonance problem and effect of source impendence on performance it was dropped. In the proposed model, VSI used as Shunt Active Power Filter is proposed to design as per work producing component of basic current of load (ICos) for providing to eliminate distortion of a sinusoidal waveform by waveforms of different frequencies and power produced by non-work producing component reparation as requested by reactive load drawn non-sinusoidal current from sinusoidal supply. Control circuit of Voltage Source Inverter provided to improve quality of power is performed for various active functioning conditions under non-linear reactive loads. MATLAB / Simulink simulation tool is used to obtain this result. The obtained outputs were within the suggested IEEE-519 standard i.e. less than 5% and also the system power factor is almost unity

Control Strategy of a Solid State Transformer for the Grid-side Converter

2020 ◽  
Vol 13 (1) ◽  
pp. 27-35
Author(s):  
Rahul Jaiswal ◽  
Anshul Agarwal ◽  
Vineeta Agarwal ◽  
Badre Bossoufi
Keyword(s):  
Solid State ◽  
Control Strategy ◽  
Power Flow ◽  
Reactive Power ◽  
Control Technique ◽  
Solid State Transformer ◽  
Simulink Model ◽  
Decoupled Control ◽  
Grid Side ◽  
Grid Side Converter

Background: This paper presents a decoupled control technique for balancing the power and voltage through grid side converter using a solid state transformer. Methods: Decoupling control is essentially a voltage oriented control technique with the objective of eliminating cross-coupling elements. Use of this decouple technique, allows bi-directional power flow control for both active and reactive power, thereby maintaining steady state DC interference voltage. Results: The performance of this scheme is analyzed & the results are obtained from the Matlab/Simulink model. Conclusion: From the above analysis, it can be concluded that the decoupled control strategy can easily eliminate the cross- coupled element of a solid state transformer for the grid side converter.

Modeling and Control of Grid Side Converter in Wind Power Generation System Based on Synchronous VFDPC with PLL

2011 ◽  
Vol 52-54 ◽  
pp. 1917-1922
Author(s):  
You Gui Guo ◽  
Ping Zeng ◽  
Li Juan Li ◽  
Jie Qiong Zhu ◽  
Wen Lang Deng ◽  
...  
Keyword(s):  
Power Generation ◽  
Wind Power ◽  
Reactive Power ◽  
Phase Lock Loop ◽  
Active Power ◽  
Wind Power Generation ◽  
Generation System ◽  
Power Generation System ◽  
Grid Side ◽  
Grid Side Converter

Virtual flux oriented direct power control (VFDPC) is combined space vector modulation (SVM) with PI of DC-link voltage, active power and reactive power to control the grid side converter in wind power generation system in this paper. VFDPC has reached good performances with PLL (phase lock loop). First the mathematical models of grid side converter, LCL filter and phase lock loop are given. Then the control strategy of grid side converter-based wind power generation system is given in detail. Finally the simulation model is modeled consisting of power circuits, such as the grid side converter, LCL filter, transformer grid, and control parts, such as PI controllers of DC-link voltage, active power, reactive power, and SVM, and so on. The simulation results have verified that the control strategy is feasible to fit for control of gird currents, active power, reactive power and DC-link voltage in wind power generation system.

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