Power Quality Improvement of Grid Connected Wind Energy System having Balanced and Unbalanced Non-linear Loads
Veeraiah Kumbha1, N. Sumathi2, K. Siva Naga Raju3
1Veeraiah Kumbha, Department of Electrical And Electronics Engineering, JNTU, Kakinada, India.
2N. Sumathi, Department of Electrical And Electronics Engineering, JNTU, Kakinada, India.
3K. Siva Naga Raju, Department of Electrical And Electronics Engineering, Gudlavalleru Engineering College, Vijayawada, India.
Manuscript received on May 17, 2012. | Revised Manuscript received on June 14, 2012. | Manuscript published on June 30, 2012. | PP: 180-186 | Volume-1 Issue-5, June 2012. | Retrieval Number: E0463061512/2012©BEIESP

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Abstract: A Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency that results in a failure or a mis-operation of end user equipments. Utility distribution networks, sensitive industrial loads and critical commercial operations suffer from various types of outages and service interruptions which can cost significant financial losses. With the restructuring of power systems and with shifting trend towards distributed and dispersed generation, the issue of power quality is going to take newer dimension. 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 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. Finally the proposed scheme is applied for both balanced and unbalanced linear non- linear loads.
Keywords: International electro-technical commission (IEC), power quality, wind generating system (WGS).