Wind TUrbine and Result

Figure 2 shows that the offshore-wind turbine individual simulation output using PSCAD/EMTDC [3]. It shows the real power (PwindMW) and the mechanical torque (Tmwindpu) of the offshore-wind turbine, also the AC voltage line to line (Vwind-L-L (RMS) kV). The per-unit machine speed is controlled to be 1.014 per-unit constant throughout the simulation. The design parameters of the wind turbine are listed in Table 1.

As shown Fig. 2, the wind generator is in starting up condition until 0.9 s. Wind speed noise is given throughout the simulation period. The noise amplitude controlling parameter is 1 rad s-1, a number of noise components is 30, surface drag coefficient is 0.0192, random wind speed is 8 m s-1, and time interval of random

Images Kyoto Wind Turbines

Fig. 2 Simulation results for offshore-wind turbine with mechanical torque

Fig. 2 Simulation results for offshore-wind turbine with mechanical torque

Table 1 Parameter of offshore-wind turbine

Parameters

Value

Rated power

2.3 MW

Rated line voltage

5.8 kV

Rotor radius

60 m

Air density

1.229 kg m-3

Rated wind speed

8-11 m s-1

Maximum power of coefficient

0.33

Stator resistance

0.066 p.u.

First cage resistance

0.018 p.u.

Second cage resistance

0.046 p.u.

Stator unsaturated leakage reactance

3.86 p.u.

Rotor unsaturated mutual reactance

0.122 p.u.

Second cage unsaturated reactance

0.105 p.u.

Moment of inertia

5 s

generation is 0.35 s. Additionally Ramp wind starts at 6 s, a number of ramp is 3, ramp period is 1 s and ramp wind maximum velocity is 3 m s-1. Gust wind starts at 10 s the wind adds gust wind force to the blades to rotate the generator shaft, gust peak velocity is 3 m s-1, gust period is 1 s, a number of gust is 3. The actual power for this system fluctuates between 1.8 and 2.7 MW while the torque changes between 0.7 per-unit and 1.2 per-unit. AC line to line voltage RMS is 5.8 kV almost constant.

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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