Your Questions About Wind Turbine Generators Manufacturers
Thomas asks…
Wind energy distribution and wind energy in spain?
I would like to know how wind energy is transported from the wind farms to our homes. Also, what appliances could wind energy support? Could you also add some info about wind energy in spain as that is what my project is about. Any help will be greatly appreciated
admin answers:
Wind energy is not transported but TRANSMITTED. These are also known as wind turbines.the blades move with the help of wind with particular speed on which the generator build the electricity,this electricity is then transmitted to the transformer to step down and connected conductors (wires)lead them to residential area by the help of poles.the electricity reaching to you,no one out side of the power plant can tel its from wind turbine,nuclear power plant,thermal power or any other………from all types the electricity is transmitted after transforming(step-up or step-down),the frequency and voltage is kept as recommended for any country……so no one finds any difference in electricity.no difference means appliance need electricity which is in particular frequency and voltage,if you provide it according to its need it will work,weather its from wind power plan or thermal.
Renewable energy in Spain
Spain is the world’s third biggest producer of wind power, after the United States and Germany, with an installed capacity of 16,740 megawatts (MW) at the end of 2008, a rise of 1,609 MW for the year. The largest producer of wind power in Spain is Iberdrola, with 27 percent of capacity, followed by Acciona on 16 percent and Endesa with 10 percent. Steady growth in capacity is expected in 2009, despite the credit crunch, due to long-term investments. Spain’s wind farms are on track to meet a government target of 20,000 MW in capacity by 2010.
On particular windy days, wind power generation has surpassed all other electricity sources in Spain, including nuclear. On April 18, 2008 the all time peak for wind generation was seen (10,879 MW, 32% of Spain’s power requirement),and on November 24, 2008 the wind energy produced the 43% of the demand.Wind power is an important energy source in Spain because the Spanish government has sanctioned a green energy approach to guarantee an increase in the country’s wind generation capacity, with aspirations to install a total of 20.1 GW of wind power by 2010.The approaches of energy deregulation that have been initiated in Spain recently are generating noteworthy developments within the energy sector. Multilateral cooperation for involvement in wind power production throughout Europe has created investment prospects for the industry and lower energy costs due to the efficiency of the renewable energy source and its domestic availability.
“The business framework for the installed capacity of wind power in the Autonomous Regions was made up of more than 170 companies that included manufacturers (wind turbines, blades, towers, generators, multipliers, electrical equipment, etc.), suppliers (hydraulic and electrical equipment and equipment for controlling and regulating), mechanical construction and public works companies, installation companies and maintenance, exploitation, and engineering companies in 2003”.
“Spanish companies are leading the way in turbine innovation by increasing the size of turbines while reducing turbine weight, and are also developing new technologies to take advantage of wind changes and split-second power outages”.
Lisa asks…
How to buidl the wind charge controller for charging battery bank of 48V DC 700 Ah capacity from 5kw turbine?
admin answers:
Hey Nita, do you already own that 5kw wind generator? That is a lot of power to feed into that size battery bank. If you have done a load analysis on whatever you are using the power for and come up with this battery bank and generator, then I am assuming you don’t need the battery to run your loads very long. On a windy day, your 5kw turbine will fill that battery up from empty to full in less than 8 hours, which might not be good for them. And then if you have several thousand watts of loads, on a calm day, a 700 AH battery will be dead in just a few hours.
At any rate, virtually all wind turbines do not use a charge controller. They tend to throw that phrase around a lot in discussions when what they really use is a load controller. There is a big difference. A charge controller is normally used in a solar array, by limiting the amount of current from the panels to the batteries when the battery bank is near full. It does this by sensing the battery voltage. A 48 volt battery bank will be near full when the voltage gets near 58 volts, or goes higher. The problem with wind turbines and hydro generators is that the power is developed mechanically with a source you have no control over, the wind or flowing water. To keep from overspeeding the turbine, all the power it developes must go someplace. So they use a load controller instead, which lets the batteries begin to overcharge just a bit, like maybe to 59 volts, then the controller turns on a dummy load, like a bank of 100 watt light bulbs, or an electric heating element. This load starts draining the batteries until the voltage comes back down to maybe 55 volts, then it turns off again.
Most turbine manufacturers include this type of controller with the turbine, or charge a nominal fee for it as an add on. Ours is a good example, it is a Southwest Windpower H-40, rated at .9kw. It has a 1.5kw heating element dump load that is controlled by the same box that the turbine output feeds into. You set the voltage you want the dump to start at, and it does the work for you. All the power from the turbine comes into the box all the time, it has no idea if it is going out to the batteries, or to the dump load intermittently. If you have a turbine with no controller, you could simply buy one, they are made by heliotrope, xantrex, morningstar and other companies. You’ll need one with the correct voltage, and enough amperage to handle the entire turbines output. A 5kw at 48 volts will need at least a 100 amp controller. You can add your own dump load if you like, maybe a bank of ceramic light bulb sockets with 100 watt bulbs screwed in. If you are using a large inverter, like a Xantrex 5548 for example, they have several programmable dump load controllers built in, you can set the first to go on at 55 volts, and off at 52, the second to go on at 57 volts and off at 55, and so on. There are lots of ways to set it up, but it has to be a load, or dump controller set up, not a charger controller. Many controllers can be set up to do either, but not both. A few have both, designed for solar and wind setups together.
If it were me, I’d call someone that sells these things and tell them what you are trying to do. A good place to start is Home Power Magazine, they have tons of ads for places like Backwoods Solar, or Alt Energy Store where you can get expertise and purchase a controller on the spot. I’ll list some sources below for you. Good luck Nita, Rudydoo
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