It's very simple, because of the number of induction coils. The coils required to achieve full power at 1800 rpm are lower than those selected at 1500 rpm. In today's wind energy environment, cost reduction means survival.
In addition, due to the specific wind speed of the wind field, the wind speed is fast and the cutting area of the blade is large, so it must be designed to rotate at 1800 rpm.
The purpose of keeping the speed constant in the starting area of the wind turbine
When the wind power is sufficient and stable, one turn can generate 1.94 kilowatt hours of electrical energy.
1. This is related to factors such as fan type and capacity and generator speed. For example, if the permanent magnet generator of a 2 MW direct drive fan reaches the rated speed of 17 rpm, the time for one revolution is 60/17 =3.5 seconds. If a 2 MW wind turbine continues to produce electricity for 1 hour at rated speed, the amount of electricity generated in 3.5 seconds is 3.5 × 2000/3600 = 1.94 kilowatt hours, that is that is, this amount of electricity is generated in one turn. For dual-feed fans this is also related to the reduction ratio of the gearbox.
2. Power generation refers to the process of producing hydroelectric power, thermal power from fossil fuels (coal, oil, natural gas), nuclear power, etc. Transformed into electrical energy by power plants. DC power generation mainly uses electrochemical methods to produce electricity, usually called batteries, which mainly use low power consumption. The main forms of electricity production are hydroelectricity, thermal energythat and nuclear energy.
3. Wind turbines are made up of basic components such as turbines, nacelles and towers. Its power generation principle is very simple: the unit uses wind energy to rotate the wind turbine turbine, and the wind energy is converted into mechanical energy. The generator then converts the mechanical energy into electrical energy and then transmits the electrical energy to the generator. wind farm booster station via the collector line, then transmit it to the wind farm after stimulation. The electricity grid can become clean wind energy used by thousands of households.
Obtain electrical energy at constant frequency. The purpose of keeping the speed constant in the starting zone of the wind turbine is to obtain electrical energy with a constant frequency. The constant speed of wind power generation is generally achieved by a speed gearboxvariable esse and a variable pitch wind wheel, but reactive power compensation equipment must be added. Wind turbines are electrical equipment that convert wind energy into mechanical work, which causes the rotor to rotate and ultimately produces alternating current.