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Dilip Y
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I simply wanted to know, whether we can store AC power like DC?
Dilip Y said:I simply wanted to know, whether we can store AC power like DC?
With ac induction generators, the frequency does not change with rotor speed, hence induction generators are commonly employed for windmill generators connected to the grid. The slip frequency between the rotor and stator changes with wind speed and rotor speed, but the frequency generated stays constant. If you search using the key words "induction generator frequency" you should get some detailed info. BR.Svein said:This question has suddenly become more important when electric companies started using windmills. Wind is seldom constant, so if the windmills produce AC, the frequency will vary with the speed of the windmill and cannot therefore be added directly into the power grid which has a fixed frequency. One solution is to convert to DC and use the DC to create AC with the correct frequency and phase. My take on it was to use the power from the windmills in conjunction with a hydroelectric plant - use the windmill power to pump some of the water from the downside of the hydroelectric plant up to the input dam - to be used again. In this case we are storing the inconvenient AC from the windmills as potential energy in the water.
Exactly. And http://www.hydro.org/tech-and-policy/technology/pumped-storage/ is a good way.Simon Bridge said:We can store energy, and the energy carried by an AC electric current can, indeed, be stored.
Pumped storage is an essential solution for grid reliability, providing one of the few large-scale, affordable means of storing and deploying electricity.
It is certainly one way - whether it is a "good" way depends on the circumstances... which are not present in the original question, which has been answered.Exactly. And http://www.hydro.org/tech-and-policy/technology/pumped-storage/ is a good way.
I do not doubt that, but back when I was working as a consultant for ABB, I put the question to the local R&D director. His answer: "They use DC".cabraham said:With ac induction generators, the frequency does not change with rotor speed, hence induction generators are commonly employed for windmill generators connected to the grid. The slip frequency between the rotor and stator changes with wind speed and rotor speed, but the frequency generated stays constant. If you search using the key words "induction generator frequency" you should get some detailed info. BR.
Yes, it is possible to convert AC power to DC power using a device called a rectifier. This device uses diodes to convert the alternating current to direct current, which can then be stored in batteries or other storage devices.
No, AC power cannot be stored in the same way as DC power. DC power can be stored in batteries, while AC power needs to be converted to DC power before it can be stored.
DC power is more commonly stored because it is easier to convert and store than AC power. AC power needs to be converted to DC power before it can be stored, which adds an extra step and cost to the process.
Yes, it is possible to store AC power without converting it to DC power. This can be done using a device called an AC coupling capacitor, which can store AC power in the form of an electric charge.
Storing AC power has several advantages over storing DC power. AC power is more efficient for long-distance transmission, so it can be stored and transmitted over longer distances without significant losses. Additionally, AC power can be easily converted to different voltages, making it more versatile for different applications.