What is fixed speed induction generator?

speed WECs use cage induction generators (CIG), and are directly connected to the grid through a transformer (shown in Fig. 9). Since the rotational speed of CIGs is limited to a narrow range governed by the generator slip (2%), these WTGs are called fixed speed wind turbines.

What is the difference between induction motor and induction generator?

Induction generator is also called as Asynchronous generator or induction motor used as induction generator (IMAG). An induction motor is called an induction generator when it is sued with negative slip i.e. speed of the rotating magnetic field is less than the rotor speed.

How many types of induction generator are there?

two types
Generally, there are two types of induction generators widely used in wind power systems – Squirrel-Cage Induction Generator (SCIG) and Doubly-Fed Induction Generator (DFIG).

What is the output of induction generator?

An induction generator produces electrical power when its rotor is turned faster than the synchronous speed. For a typical four-pole motor (two pairs of poles on stator) operating on a 60 Hz electrical grid, the synchronous speed is 1800 rotations per minute (rpm).

What are the advantages and disadvantages of a fixed-speed turbines?

The fixed-speed wind turbine has the advantage of being simple, robust and reliable and well-proven. And the cost of its electrical parts is low. Its disadvantages are an uncontrollable reactive power consumption, mechanical stress and limited power quality control.

What are the shortcomings of an induction generator in real time system?

Induction generator can only work at leading reactive power. Explanation: Because it can not supply any lagging power factor.

Can induction motor convert to generator?

Basically, an induction motor can be used as a generator by adding capacitors at the output generator. The capacitor installed in the output of the generator will supply reactive power which will raise the output voltage on the generator.

Why capacitor is used in induction generator?

The function of the capacitor bank is to provide the lagging reactive power to the induction generator as well as load. So mathematically we can write total reactive power provided by the capacitor bank is equals to the summation of the reactive power consumed by the induction generator as well as the load.

What are the disadvantages of an induction motor as a generator?

Disadvantages of Induction Generators An induction generator requires reactive volt-amperes from the supply line to furnish its excitation.

How efficient are induction generators?

Induction generator at single-phase C2C balanced condition has higher efficiency at higher capacitor and lower speed such as at 45µF capacitor bank, around 1 kW load and 1450 RPM speed has the highest efficiency i.e. 88%. The reason for this much higher efficiency is the reliable speed and capacitor bank.