Wind Turbine Emulator

Abstract

The paper presents the development of a DC motor based Wind Turbine Emulator (WTE) and its performance verification through simulation. The torque signal that represents the actual wind turbine with environmental effect was made to generate at the DC motor shaft. Particularly, the study incorporates the turbine power control strategy including the effect of stochastic and deterministic load components with the shaft dynamics. The WTE with the Wind Energy Conversion System (WECS) is studied to verify the effectiveness of the WTE in the presence of various wind characteristics.

An Induction Motor Based Wind Turbine Emulator

“…It can be seen that Eqs. (7) and (12)lines 1 and 2, respectively, give rather close results at large λ values, though coefficients C 1 -C 6 in Eq. (12) are to be changed to fit the curves.…”

“…The coefficients C 3 , C 7 and C 8 are not considered since β=0. Equation 12described by line 2 gives more variance at low λ values due to the lack of term C 6 λ as compared with (7). Approximation (13) characterized by curve 3 has a significant deviation at higher λ values and the beginning of the curve is linearized, which gives a considerable error at low λ values.…”

“…where C 1 -C 7 are different from those used in (7) and 12Theoretical C P curves as function of λ are shown in Fig. 1.…”

“…The wind speed and rotor speed ω are fed to a microcontroller in which the reference torque is calculated by Eqs. (3), (4), (6) and (7). In the case of a fixed blade (stall-controlled) turbine the pitch angle of the blade is fixed to 0 o , and, therefore the power coefficient depends only on λ; hence (7) and (8) can be simplified:…”

“…In earlier works (e.g. [1][2][3][4][5][6][7][8][9][10][11][12]) the use of electric drive wind turbine emulators for simulating the torque of a wind turbine is reported.…”