Abstract
Until recently it has been accepted that induction generator based wind turbines are disconnected from the power system in the event of a network disturbance. However, the increasing trend of connecting high penetrations of wind farms to transmission networks has resulted in the transmission system operators revising their grid codes for the connection of large MW capacity wind farms. The new grid codes require wind turbines to remain connected for a specified voltage disturbance on the network. Most of the wind generation plant being developed will use either fixed speed induction generator (FSIG) or doubly fed induction generator (DFIG) based wind turbines. The basics of using a doubly-fed induction generator (DFIG) to convert the mechanical energy of the wind into useful electrical power that can be used to supply electricity to any grid are presented. The ability of doubly fed induction generator based wind turbines to remain connected through power system disturbances is discussed. A crowbar protection system to provide a power system fault ride-through capability for doubly fed induction generator based wind turbines is also described. The dynamic behaviour ofDFIG wind turbines normal operation and during grid faults are simulated and assessed to verify the recommended method using a Matlab/Simulink developed model.
Highlights
People have harnessed the wind throughout history to convert wind energy into useable energy
Beginning in the 1930s, rural electrification programs began to extend the electrical grid into the countryside, replacing wind energy with electricity generated from fossil fuels and large hydroelectric projects
The two most hardware solutions to solve the low voltage ride-through (LVRT) problem that have been researched and considered include: (i) power converter with UPS, in this method the UPS behaves as a source or a sink to allow the bidirectional power flow depending on the operation of the generator; Oi) active crowbar, power resistors are connected to the rotor windings and controlled to turn on absorbing excessive rotor energy [8]
Summary
Energy from the sun, in the form of wind, plant matter, and heat and light, is renewable. Renewable energy offers a clean, cost effective alternative to fossil fuels and nuclear power. Less than 100 years ago, millions of small windmills provided an important source of power for rural homes These machines powered water pumps and converted wind into electricity. Declining costs and improving technology are quickly making electricity generated from wind energy competitive with all types of non-renewable fuels, like new coal-frred generation. Across Canada, electricity generated from wind is powering almost one million homes and business in a clean, reliable and efficient manner. A year 2009 has been a record year for wind energy development in Canada with a new installed capacity of 950MW. The Canadian \Vind Energy Association's goal is 10,000 MW of installed wind energy in Canada by the end of year 2010, enough to supply 5% of Canada's electricity needs. It is crucial that the government creates a level playing field for wind energy so that it can compete with conventional energy [2]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
