Article

A STATCOM-Control Scheme for Grid Connected Wind Energy System for Power Quality Improvement

Visvesvaraya Nat. Inst. of Technol., Nagpur, India
IEEE Systems Journal (Impact Factor: 1.98). 10/2010; 4(3):346 - 352. DOI: 10.1109/JSYST.2010.2052943
Source: IEEE Xplore

ABSTRACT

Injection of the wind power into an electric grid affects the power quality. The performance of the wind turbine and thereby power quality are determined on the basis of measurements and the norms followed according to the guideline specified in International Electro-technical Commission standard, IEC-61400. The influence of the wind turbine in the grid system concerning the power quality measurements are-the active power, reactive power, variation of voltage, flicker, harmonics, and electrical behavior of switching operation and these are measured according to national/international guidelines. The paper study demonstrates the power quality problem due to installation of wind turbine with the grid. In this proposed scheme STATic COMpensator (STATCOM) is connected at a point of common coupling with a battery energy storage system (BESS) to mitigate the power quality issues. The battery energy storage is integrated to sustain the real power source under fluctuating wind power. The STATCOM control scheme for the grid connected wind energy generation system for power quality improvement is simulated using MATLAB/SIMULINK in power system block set. The effectiveness of the proposed scheme relives the main supply source from the reactive power demand of the load and the induction generator. The development of the grid co-ordination rule and the scheme for improvement in power quality norms as per IEC-standard on the grid has been presented.

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    • "e l s e v i e r . c o m / l o c a t e / e n c o n m a n require reactive power for magnetization [12]. Therefore, the second is to compensate for this reactive power. "
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    ABSTRACT: The influence of a constant speed wind turbine in an electrical network during torque impact can lead to various problems. The disturbances affect active power quality, reactive power and r.m.s. phase to phase voltage. In this paper, we propose an original system and control to solve firstly the problems due to the variation of DC-voltage source and secondly the brutal impact of active and reactive powers. The principle of the proposed wind energy system with STATCOM supercapacitor energy storage is to limit the rapid variation of active power and give the required reactive power compensation to the induction machine during the torque change. The supercapacitor is directly coupled to the common DC-link of the whole bidirectional DC–AC converter. The control strategy of the STATCOM uses a Linear Matrix Inequalities (LMIs) approach to regulate the currents injected or absorbed by the inverter. The same strategy is used to control the variable DC supercapacitor voltage. The simulation results of the STATCOM using a state-feedback with integral controller for currents of the converter and a simple proportional ( ) controller cascaded to d axis current loop for DC voltage source are presented and discussed. Finally, implementation in real time is performed and the first experimental results are presented to validate the proposed control.
    No preview · Article · May 2015 · Energy Conversion and Management
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    • "Le premier est d'améliorer les performances dynamiques et la qualité de l'énergie du réseau. Par ailleurs, les machines à induction nécessitent de la puissance réactive pour leur magnétisation [4]. Ainsi, le second sera la compensation de cette puissance réactive. "
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    ABSTRACT: p>L'utilisation d'éoliennes à vitesse fixe dans un réseau électrique entraîne des problèmes de fluctuations de puissance lors de variations de la vitesse du vent à travers le couple. Les perturbations affectent la qualité de la puissance active et la puissance réactive du réseau. Le principe du système proposé dans cet article concerne l'association d'une éolienne et d'un STATCOM avec un supercondensateur sur le bus continu. L'objectif est de filtrer les variations de la puissance active et de compenser de puissance réactive nécessaire à la magnétisation de la génératrice asynchrone. La stratégie de contrôle du STATCOM est basée sur une commande par retour d'état qui utilise la technique des LMIs (Linear Matrix Inequalities) pour la synthèse des régulateurs des différentes boucles. Ces régulateurs prennent en compte la variation de la tension du bus continu. Le système a été simulé avec le logiciel Matlab/Simulink. Les résultats de simulation sont présentés et commentés. </p
    Full-text · Article · Jul 2014
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    • "The STATCOM will give best reactive power support at low voltage than the SVC. This is because of the reactive power from the STATCOM decrease linearly with the AC voltage [3]. "
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    ABSTRACT: In this paper wind farm connected to the grid with shunt connected STATCOM is analyzed. The injection of wind farm to grid will suffer from power quality issues. The proposed system will give better solution to the power quality issues. The Bang-Bang controller is used to control scheme for to produce switching signal to IGBT of STATCOM. In the proposed system the STATCOM is connected to point of common coupling with energy storage system. The control scheme of STATCOM connected to grid with wind energy generation system is simulated using MATLAB/SIMULINK.
    Full-text · Conference Paper · Jan 2014
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