You can learn the primary system diagram and secondary circuit diagram of power plant, which are generally used for wind turbines, box type transformers, hand trolley type circuit breakers, trolley type PTs. arms, main transformers, grounding transformers, and station Transformers, surge arresters, knife switches, CTs, circuit breakers, secondary protection equipment, svg (svc), associated high and low voltage cables, etc.
A large wind turbine has multiple functions
Wind turbine, converts wind energy into electrical energy
Box type transformer, energy production and export facility , raises the generator to a certain voltage
The main transformer, uniformly increases the electrical energy emitted by the entire site. The voltage reaches the network level, either 66kV or 220kV
The electrical cabinet plays the role of connectionion or isolation. The isolation switch also has the function of isolating or connecting and is an obvious disconnection point.
Lightning rod, no need for explanation
Voltage transformer and current transformer, used to measure voltage and current signals
The weight of a large wind turbine At 400-500 tons.
The blades of a 6 megawatt wind turbine weigh about 70 tons, the generator rotor weighs about 100 tons, and the generator stator weighs about 140 tons. Including the weight of the cabin and tower, it is approximately 460 tonnes.
Due to the unstable air volume, the wind turbine produces 13-25V alternating current, which needs to be rectified by the charger, and then the battery is charged, so that the electrical energy generated by the wind turbine is converted into chemical energy.
Structure of the generator:
Nacelle: The nacelle contains the key wind turbine equipmentne, notably gearboxes and generators. Maintenance personnel can enter the nacelle through the wind turbine tower. The left end of the nacelle is the wind turbine rotor, that is, the rotor blades and shaft.
Rotor blades: capture the wind and transmit the wind force to the rotor shaft. On a modern 600-kilowatt wind turbine, each rotor blade is about 20 meters long and designed to resemble an airplane wing.
Axis: The rotor axis is attached to the low speed shaft of the wind turbine.
Low speed shaft: The low speed shaft of the wind turbine connects the rotor axis and the gearbox. On a modern 600 kW wind turbine, the rotor turns quite slowly, around 19 to 30 rpm. There are conduits in the shaft for the hydraulic system to activate the operation of the aerodynamic brake.