Which part of windmill power generation uses power capacitors?

At present, there are two main types of generators used in large wind farms. One is a doubly-fed asynchronous generator; the other is a direct-drive asynchronous generator. The stator of the doubly-fed asynchronous generator is directly connected to the grid, and the rotor is connected to the grid through a doubly-fed converter; the direct-drive generator is connected to the grid through a full-power converter. A converter is used in the middle. This is a power electronic device. The device itself requires many capacitors. The largest one is the DC energy storage capacitor, which plays a supporting role in the DC voltage in the converter. Generally, it uses electrolytic capacitors. Capacitors, especially film capacitors, are also used; then there are filter capacitors at the output end, which are usually film capacitors. All of the above are actually components inside the converter. In order to improve the power factor of wind farms and reduce harmonic components, it is generally necessary to install reactive power compensation devices and filtering devices in wind farms. The main components of reactive power compensation devices and filtering devices (referred to as passive filtering) are capacitors. The capacitors used here are generally high-voltage power capacitors. According to current technology, they are mainly full-film oil-filled capacitors. The entire compensation capacity will be 20 to 50% of the total installed capacity of the wind farm.