HARMONIC REDUCTION AND FREQUENCY CONTROL OF DFIG BASED WIND ENERGY CONVERSION SYSTEM

  P.GAYATHRI,  C.SANTHANA LAKSHMI

As the power consumption increases globally, the fuel usage also increases which pollutes the environment, and this motivates the use of renewable energy resources. Wind energy system is most widely used everywhere which meets the power demand. The proposed system uses the DFIG for Wind energy conversion system with Harmonics reduction and frequency control. In DFIG, the stator is directly connected to the grid as two back to back connected Voltage Source Converters (VSCs) are placed between the rotor and the grid. Nonlinear loads are connected at PCC as the proposed DFIG works as an active filter in addition to the active power generation similar to normal DFIG. Harmonics generated by the nonlinear load connected at the PCC distort the PCC voltage. These nonlinear load harmonic currents are mitigated by GSC control, so that the stator and grid currents are harmonic free. RSC is controlled for achieving MPPT and also for making unity power factor at the stator side by using voltage oriented reference frame. Synchronous reference frame (SRF) control method is used for extracting the fundamental component of load currents for the GSC control. And also, the frequency is monitored and controlled by using PLL. This proposed system is evaluated using the MATLAB Simulink software.

Keywords- DFIG, Frequency Controller, GCS

Unique Identification Number - IJEDR1702102
Page Number(s) - 588-592
Pubished in - Volume 5 | Issue 2 | April 2017
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  P.GAYATHRI,  C.SANTHANA LAKSHMI,   "HARMONIC REDUCTION AND FREQUENCY CONTROL OF DFIG BASED WIND ENERGY CONVERSION SYSTEM ", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 2, pp.588-592, April 2017, Available at :http://www.ijedr.org/papers/IJEDR1702102.pdf