Model validation

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The Spanish PVVC and the German FGW-TG4 (FGW, 2009) give the procedures to validate wind turbine systems by comparing the results obtained by simulation and that obtained from on-site test. PVVC and FGW-TG4 gives the maximum deviation and the specific time intervals for the comparison of the results. The Spanish PVVC establishes a time window of 1 s with 100 ms before the voltage dip, and the German FGW-TG4, 500 ms before the voltage dip and 2 s after the voltage recovery. Fig. 18 shows the different time windows established in each document. It is important to point out that the time window from the PVVC is fixed and does not depend on the voltage dip duration whereas the FGW-TG4 depends on it.

window

Fig. 18. Time window established in the German FGW-TG4 and the Spanish PVVC.

Respect the maximum deviation, in the Spanish PVVC it is constant and equal to 10% in the time frame, and the German FGW-TG4 establishes these values:

Deviation Fl

Deviation F2

Deviation F3

Total Deviation FG

Active Power AP/Pn, Reactive Power AQ/Pn

Q.Q7

Q.2Q

Q.lQ

Q.l5

Reactive current AIb/Ir

Q.lQ

Q.2Q

Q.l5

Q.l5

Table 9. Maximum deviation in different stages of voltage dip.

Table 9. Maximum deviation in different stages of voltage dip.

Where F1 is the deviation of the mean of steady state areas, F2 the deviation of the mean of transient areas, F3 the highest deviation in steady state areas and FG the mean of weighted deviations for P, Q and Ib.

Next the validation process followed for a wind turbine generator from in-field testing results according to the Spanish PVVC.

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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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