scholarly journals Power Electronic Systems Used in Renewable Energy systems: Recent Trends and Future Challenges

2013 ◽  
pp. 41-49
Author(s):  
P. K. Pradhan ◽  
M. S. Bada Panda ◽  
Ipsita Dwibedi ◽  
Swetlina Bhuyan
Keyword(s):  
Power Electronics ◽  
Wind Turbines ◽  
Focal Point ◽  
Electronic Systems ◽  
Power Electronic ◽  
Variable Speed ◽  
Wind Energy Conversion Systems ◽  
Future Challenges ◽  
Efficiency Cost ◽  
Energy Conversion Systems

Power electronics systems used in wind energy conversion systems (WECS) are very important in modern variable speed large wind turbines and have become a focal point in the research of devices and their control mechanism. Most modern wind turbines operate at variable speed. This paper provides an in-depth review of power electronics systems used to interface variable speed wind turbine to the electric grid. The different variable speed induction generator-converter combinations are compared on the basis of topology, efficiency, cost and control techniques. Comparisons of the variable-speed and fixed-speed wind turbines (WT) are discussed. Moreover, attempts are made to highlight future trends and future challenges in power electronic systems in wind power generation.

scholarly journals Study of DOUBLY-FED Induction Generator For Variable Speed Wind Energy Conversion Systems

2012 ◽  
pp. 273-277
Author(s):  
Manasi Pattnaik
Keyword(s):  
Wind Energy ◽  
Wind Turbines ◽  
Doubly Fed Induction Generator ◽  
Variable Speed ◽  
Wind Energy Conversion ◽  
Wind Energy Conversion Systems ◽  
Energy Conversion Systems ◽  
Evolution Of Technology ◽  
Grid Codes ◽  
Doubly Fed

In recent years, wind energy has become one of the most important and promising sources of renewable energy, which demands additional transmission capacity and better means of maintaining system reliability. The evolution of technology related to wind systems industry leaded to the development of a generation of variable speed wind turbines that present many advantages compared to the fixed speed wind turbines. For example, grid codes are being revised to ensure that wind turbines would contribute to the control of voltage and frequency and also to stay connected to the host network following a disturbance. In response to the new grid code requirements, several DFIG models have been suggested recently. This paper deals with the introduction of DFIG and AC/DC/AC converter control

scholarly journals The Energy Processing by Power Electronics and its Impact on Power Quality

2012 ◽  
Vol 1 (3) ◽  
pp. 99 ◽  
Author(s):  
J.E. Rocha ◽  
W.D.C Sanchez
Keyword(s):  
Power Electronics ◽  
Wind Turbines ◽  
Power Grid ◽  
Harmonic Distortion ◽  
Wind Energy Conversion Systems ◽  
Grid Connection ◽  
Different Types ◽  
Energy Conversion Systems ◽  
Energy Processing ◽  
Grid Side

This paper discusses the electrical architectures adopted in wind turbines and its impact on the harmonic flux at the connected electric network. The integration of wind electric generators with the power grid needs energy processing by power electronics. It shows that different types of wind turbine generator systems use different types of electronic converters. This work provides a discussion on harmonic distortion taking place on the generator side, as well as in the power grid side. Keywords: grid connection, harmonic distortion, power electronics and converters, wind energy conversion systems, wind power, wind technology, wind turbines

Studying the Potential of a Novel Multiple-Generator Drivetrain in Wind Energy Conversion Systems

2013 ◽  
Author(s):  
N. Goudarzi ◽  
W. D. Zhu
Keyword(s):  
Wind Turbines ◽  
Offshore Wind ◽  
Offshore Wind Turbines ◽  
Wind Energy Conversion ◽  
Advantages And Disadvantages ◽  
Wind Energy Conversion Systems ◽  
Energy Conversion Systems ◽  
Switch Mechanism ◽  
The Cost ◽  
Operational Range

A novel multiple generator drivetrain (MGD), where a single large generator in a wind turbine is replaced by multiple generators with the same or different rated powers, is proposed along with an automatic switch mechanism as an alternative to an existing MGD. To better understand the advantages and disadvantages of having a MGD in onshore/offshore wind turbines, a MGD with a single or double stage gearbox and multiple generators is compared with a conventional drivetrain with a triple-stage gearbox and a large induction generator. A simple mathematical model for a MGD with an automatic switch is developed, a novel prototype of a MGD is designed and fabricated, and experiments are conducted on the prototype. It is concluded that a multiple-generator drivetrain with generators operating individually or in parallel through an automatic switch mechanism has a better potential of improving the efficiency and the reliability, expanding the operational range, and reducing the cost of offshore and onshore wind turbines than the existing MGD configuration.

Sign in / Sign up

Export Citation Format

Share Document