Generator

There are two types of generators That Mainly it makes use of the wind turbines; Asynchronous and synchronous. Here we will explain in brief the differences and advantages and disadvantages of These generator types.

Direct coupled asynchronous

An asynchronous generator ice Briefly an electric motor of the same type as found in the building saw or vedkapen. These can not generate power without magnetized and to do it as it Launched as an ordinary electric motor. When the rotor has enough wind to Exceed the synchronous speed, the generator, so That the switch to supply current and will proceed Until it Reached The Rated Speed Which typically is on 1500r / m. Exceeding to the torque Which Can Be braked by the generator requires Reducing the torque on the rotor by turning the wind otherwise the risk is great That the generator will overheat and the winding will burn. Because it requires such a high speed to start delivering power That is required toa gearbox between the rotor and the generator. There is only one way to curb this type of generator During a power outage and That is to have a mechanical brake on the input shaft. This technique has been used on wind turbines since the 70s.

Benefits Directly connected asynchronous generator

It is inexpensive to manufacture Because it requires no technology to phase out online. It will be phased in

Automatically When The speed of work Increases.

Disadvantages of Directly connected asynchronous generator

It required a gearbox and mechanical brake Which Leads to Increased maintenance and many moving parts That can break. Much-weight and technology are at the top of the tower, creating a hostile work environment. Asynchronous generator causes unnecessarily high currents Because it cyclo reactive power of the network to work, Which May have lights flashing and sensitive equipment to break. This can however be offset by soft start equipment and capacitors, unfortunately, you rarely see it in the smaller wind turbines due. Reasons cost. In the turmoil that have all the power passed to the main shaft and it can provides professional fairly large loads Briefly and create large fractures. However, this is Primarilya problem of large plants. An asynchronous wind turbines The The require some maintenance and a yearly measurement of the generator to ENSURE That it delivers an energy That is approved and within the framework of the network owner has set. Transmission and brake can create some noise, especially When They've've become worn. Since it is more moving parts, it Creates a mechanical inertia (= power loss) and hence mechanical.

Synchronous Permanent Magnet Generator

A synchronous generator acts as a dynamo on a bicycle. The generatesHTML current in a fairly wide speed range and varies Also bothering Voltage and Hz. These generators are used to thwart hydropower Because They generate power even at Relatively small speed and requires no starting voltage for starting Generating. In wind Context It is only used for synchronous generator to recharge the batteries and heats water with Heating Elements That Are Not dependent on constant Hz as the generator delivers a so mixed quality of energy. Today, there is equipment to rectify this current is then Electronically phased into the online with a very high precision. This technology has been around since the early 90s but have been too expensive to Implement the smaller establishments.

Advantages of synchronous generator

It requires no gearbox or mechanical brake. It serves as a direct drive generator and braked with electrical loads in the form of heating cartridges in different steps. Thus, less maintenance and fewer moving parts, and They do not have to climb the tower to lubricate and change brakes mm. It is not dependent on a fixed speed to deliver. It delivers from 0 r / m to rated speed and a bit higher. Obviously this is an advantage considering That the wind is not constant. It does not have the same problems with turbulence without taking care of the gusting to temporarily Increase the engine speed and power output.It magnetizes itself, Which means That it does not need any start current and down When less Demands on the connection instead. The supply nor any spikes in the network Because it is galvanically separated from the mains with an advanced power electronics for phasing online. The power electronics takes care of all by yourself, Which makes the setting That is made of us will remain Unchanged as long as the plant is in operation. Requires no readings or adjustments or measurements annually to the asynchronous plants Require. Mechanical synchronous generator silent. There are no mechanical gears and brakes That can generate noise, only the sound of the wind When The rotor blade passes the tower.

Disadvantages of a synchronous generator

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