Which transformer is used in wind turbine?
step up style transformers
The conventional transformer that is used in wind turbines are grid side, 50Hz, step up style transformers, used to increase the voltage at the output of the generator to one that is suitable for distribution, around 10kV [4] .
What does a transformer do in a wind turbine?
The wind turbine transformers act as a link between wind turbines and distribution grid. It steps up the low output voltage from the generator to higher distribution voltage level.
What is a wind turbine substation?
Almost in every wind farm a step-up substation is built to collect all the energy generated by the turbines and received through the MV cables. Although there are different possible technical solutions, normally a substation will be composed by the following elements: Medium voltage system. High voltage system.
Does each wind turbine have a transformer?
Each wind turbine in a wind farm has a generator step up (GSU) transformer which raises turbine generator voltage of few hundreds volt to medium voltage level of collector system.
Which type of transformer is distribution transformer?
A distribution transformer or service transformer is a transformer that provides the final voltage transformation in the electric power distribution system, stepping down the voltage used in the distribution lines to the level used by the customer.
Does wind turbine produce AC or DC?
Wind turbines work on a very simple principle: the wind turns the blades, which causes the axis to rotate, which is attached to a generator, which produces DC electricity, which is then converted to AC via an inverter that can then be passed on to power your home.
How do transformers work?
The core of the transformer works to direct the path of the magnetic field between the primary and secondary coils to prevent wasted energy. Once the magnetic field reaches the secondary coil, it forces the electrons within it to move, creating an electric current via electromotive force (EMF).
What are step up transformers?
A transformer that increases the voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a step-up transformer. As a step-down unit, this transformer converts high-voltage, low-current power into low-voltage, high-current power.
How much voltage does a wind turbine produce?
On large wind turbines (above 100-150 kW) the voltage (tension) generated by the turbine is usually 690 V three-phase alternating current (AC).
What does offshore substation do?
The main purpose of the offshore substation is to house the electrical high-voltage and medium-voltage components for transforming power. The power is supplied by the wind turbines at 33kV to 150kV for exporting to the onshore grid.
How many volts are in a wind turbine?
690 V
On large wind turbines (above 100-150 kW) the voltage (tension) generated by the turbine is usually 690 V three-phase alternating current (AC).
What voltage is a wind turbine?
The turbine generator voltage is normally classed as ‘low’, in other words below 1,000 V, and is often 690 V. Some larger turbines use a higher generator voltage, around 3 kV, but this is not high enough for economical direct interconnection to other turbines.
What is a wind farm substation?
The substations let the wind farm operate more efficiently by transforming the energy generated from 33,000 to 150,000V, after which electricity is exported through cables 50-km long to an onshore substation.
What is the output voltage of a wind turbine?
In a wind farm, whatever its size, the power from each turbine will have to be carried to a transformer substation before delivery to the grid. A wind turbine generator will produce an output voltage that is typically between 450 and 690 V although design output voltages vary.
How are offshore wind farms connected to the grid?
Before the power generated at an offshore wind farm is fed into the transmission grid, it is combined in an offshore transformer substation, like the Siemens’ Lillgrund offshore wind park substation. Voltage there is converted from 33 kV (or now 66 kV is sometimes used) to a transmission voltage of 138 kV by a 120-MVA power transformer.
What is an offshore substation?
Offshore substations — the systems that collect and export the power generated by turbines through specialized submarine cables — are an essential component of offshore wind farms, especially at large, multi-megawatt sites.