Wind energy system2:38 pm
Now a days we are looking for a renewable resource of energy ans wind energy is one of them.it is a source of clean and non polluting electricity.wind energy is a process by which we generate mechanical energy with help of wind .we use wind turbine to convert kinetic energy of wind into mechanical power and we connect a generator with turbine and then with help of generator we can convert mechanical energy into electricity and that energy can be used to power our homes or offices.
wind mil is a machine which is used to make energy from wind.it mainly converts the kinetic energy into mechanical energy.it mainly have two or three blades.wind mills can be connected into power grids and generators and these type of wind mills are called hybrid wind mills.there are two types o wind mills-horizontal axis wind turbine and vertical axis wind turbine.
Worldwide development of the wind energy expanded rapidly starting in
the early 1990s. the average annual growth rate
from 1994 – 2001 of the world installed capacity of wind power is 31 %
making the wind industry one of fastest growing. Unlike last
surge in wind power development during 1970s and early 1980s which
was due mainly to the oil embargo of OPEC countries the current
wave of the wind energy development is driven by many forces that make it
favorable. These include its tremendous social, environmental and technological maturity, economic
benefits, the deregulation of electricity
markets throughout the world, public support and government incentives.
In Denmark wind power accounted for 18% of electricity
consumption in the year 2001, and this share will be increased to 50% by 2030.
Canada has the total of 198 MW of installed wind power capacity as of the year
2001, with additional wind plants planned in Ontario, PEI and Alberta.
Canada has tremendous wind resources from the coast to the coast. According
to the Canadian Wind Energy Association (CanWEA), if the right government
policies are implemented, wind energy can contribute 5% of
Canada’s electricity supply by the year 2010. May WEA has released Wind
Vision for Canada, recommendations to achieve the 10,000 MW of
installed wind power capacity by 2010.
Power Quality Requirements
Harmonics: The total demand distortion of DR, which is defined as
total rms harmonic current divided by maximum demand load
current, shall be less than 5%. Each individual harmonic shall be less
than the specified level.
The DC Current Injection: A DR shall have dc current injection of less
than 0.5% of its rated output current.
Flicker: A DR will not create objectionable flicker for other customers
on the area EPS.
Q1: what is the Plant Capacity ?
Ans: 75,000 KW.
Q2:What is the Turbine Size in large wind plant?
Ans : 750KW.
Q3:Write 2 Safety and Protection Requirements?
Voltage Disturbances: At the abnormal voltages, The DR shall cease to energize
the EPS within specified clearing time.
Frequency Disturbances : DR shall cease to energize EPS if
frequency is outside the range 59.3 to 60.5 Hz.
Loss of the Synchronism: A DR of 250 kW or larger shall have loss of
synchronism protection function.
Q4:How by Loss of Synchronism Safety and Protection possible?
Ans: A DR of 250 kW or larger shall have loss of
synchronism protection function.
Q5:How by Reconnection Safety and Protection possible?
Ans: A DR may reconnect to the power system in 5 mins . after
EPS voltage and frequency return to normal.