International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 01 | Jan -2017
p-ISSN: 2395-0072
www.irjet.net
A Review: Control Strategy of Doubly Fed Induction Generator Trupti S. Thakare1, Dipali A. Umak2, R. K. Kirpane3 1UG
student, Dept. Of EE, DES’s COET, Maharashtra, India UG student, Dept. Of EE, DES’s COET , Maharashtra, India 3 UG Professor, Dept. of EE, DES’s COET, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------2004, there was 442 MW of installed wind power, Abstract -The wind turbine technology is now a corresponding to1% of the total installed electric power in developed technology. Modern wind technology is the Swedish grid. These wind turbines produced 0.8 TWh of important for generation of power grid integration, electrical energy in 2004, corresponding to approximately stability and power quality issues in the arena of 0.5% of the total generated electrical energy .Wind turbines reliable power production to user end or utility. The (WTs) can either operate at fixed speed or variable speed. paper described cumulative modernization of wind For a fixed speed wind turbine the generator is directly turbine technology. According to literature survey connected to the electrical grid. For a variable speed wind DFIG is very beneficial for industrial purpose so, its turbine the generator is controlled by power electronic very important to study the how control DFIG. This equipment. There are several reasons for using variablepaper gives information about different control speed operation of wind turbines; among those are possibilities to reduce stresses of the mechanical structure, strategies of doubly fed induction generator and acoustic noise reduction and the possibility to control active proper concept of DFIG and control their and reactive power. Most of the major wind turbine characteristics and limitations. 2
Key Words: Doubly fed induction generator, Fixed speed wind turbine, Variable speed wind turbine, different Control technique. 1 Introduction Day by day pollution has become a big problem in people daily life. As we know that day by day to increase the use of power and as compare to generation is less so, it is major problem in people daily life along with non renewable generating sources also decreases therefore for increase the generation we have to be use of renewable source such as wind energy, solar energy, etc. wind power has the fastest growing speed in the power generation. wind power is use in many countries by way of government-level policy. We will study by 2020 20% power generate by wind there supplying by large-scale offshore wind farms. Now planning for large the capacity of the large-scale offshore wind farms to more than 30 GW power by 2015 in Europe. Other countries such as also have promising large wind power resources and similar plans for wind farm installation. In the past decay wind power generation has faced a very fast development. Therefore in this paper the focus is put on the wind power generation as it is said to encounter large integration obstacles and possible solutions in the near future. The first nuclear reactor of bar seb ¨ack was shut down 30th of November 1999. Nuclear power production shall be replaced by improving the efficiency of electricity use, conversion to renewable forms of energy and other environmentally acceptable electricity production technologies. According to wind power can contribute to fulfilling several of the national environmental quality objectives decided by Parliament in 1991. Continued expansion of wind power is therefore of strategic importance. In Sweden, by the end of © 2017, IRJET
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manufacture developing new larger wind turbines in the 3to-5-MW range. These large wind turbines are all based on variable-speed operation with pitch control using a direct driven synchronous generator (without gearbox) or a doubly-fed induction generator (DFIG). Fixed-speed induction generators with stall control are regarded as unfeasible for the large wind turbines. Today, doubly-fed induction generators are commonly used by the wind turbine industry (year 2005) for larger wind turbines. The major advantage of the doubly-fed induction generator, which has made it popular, is that the power electronic equipment only has to handle a fraction (20–30%) of the total system power. This means that the losses in the power electronic equipment can be reduced in comparison to power electronic equipment that has to handle the total system power as for a direct-driven synchronous generator, apart from the cost saving of using a smaller converter.
1.1 Fixed-Speed Wind Turbine
For the fixed-speed wind turbine the induction generator is directly connected to the electrical grid according to Fig.1 The rotor speed of the fixed-speed wind turbine system has often two fixed-speed. This is accomplished by using two generator.
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