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This paper envisages comparing the performance of grid connected variable speed wind energy conversion systems (WECS) that are based on DFIG, PMSG and SCIG. The comparison criteria used are mainly the quality of power injected to the grid, range of wind speeds that each generator can handle, converter ratings, real power harnessed by each configuration and reactive power requirements. Models for these...
Renewable energy resources are getting increased attention from researchers because of depleting fossil resources, increasing fuel prices and the concern of climate change and global warming. In a country like India where long coastal line is available, offshore wind farms are one of the attractive options. Over last two decades the wind power penetration in to the grid is increasing at a very fast...
Increasing penetration of wind energy in existing conventional energy systems necessitate better power quality and control. The power electronics is advancing very fast and this facilitates the rapid growth of variable speed wind energy conversion systems (WECS). However, the issue of power quality needs a thorough attention of the people involved in research work. This paper is focusing mainly on...
Strict environmental regulations and shrinkage of fossil fuel supplies necessitate the generation of electricity by using renewable energy sources. Most promising and popular source of green electricity is wind energy. WECS using DFIG is a meritorious option as it uses back to back power converters at a reduced rating, offers high controllability, allows maximum power extraction and individual control...
Transformer fault diagnostic methods based on dissolved gas analysis (DGA) using artificial neural network (ANN), fuzzy logic & a self-adaptive neuro-fuzzy inference system (ANFIS) has been presented in this paper. Firstly, a fuzzy system development technique is proposed, in which the rule base is derived from IEEE and IEC DGA standards. The second step of the work deals with the application...
Strict environmental regulations and shrinkage of fossil fuels necessitate the generation of electrical power by using renewable energy sources. Wind energy is the most promising and popular source of green electricity. Wind energy conversion systems using SCIGs with full scale power converters is a meritorious option as these generators are simpler than the other types available and requires no brush...
Permanent magnet Synchronous Generators (PMSG) are becoming popular for wind energy conversion systems (WECS) nowadays due to the possibility of gearless operation even in grid connected mode. However, these systems have serious problems during fault conditions such as over speeding of the generator speed and undue increase in the DC link capacitor voltage. This paper proposes a complete coordinated...
Wind energy generation systems are confronted with increasing demands for power quality and active power control. With the advances in power electronics technology, the rapid growth of variable speed WECS is now witnessed. However, the power quality at the point of grid connection still remains an important issue to be addressed thoroughly by researchers. This work focuses on the development of variable...
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