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Master of Science Thesis in Electric Power Engineering - page 71 / 114

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VOLTAGE ORIENTED CONTROL – SIMULATION

SIMULATION 6 – LOAD STEP

Simulation 6 is done by modifying the load resistance from 150to 30, that corresponds, to a load asking suddenly for 16kW (30) instead of 3kW (150).

Figure 3.53 : Simulation6 results

The input power (blue) is calculated with the following equation (3.18) : 3

2 The output power (black) as below (equation (3.62)) :

As we can see in the previous figure (Figure 3.53), an overshoot appears in the d components of the current (6A overshoot). Nevertheless, this overshoot is not so visible on the 3 phase current.

Regarding the DC link voltage, we observe a small drop (5.5V, 0.7%). The controller is acting and after a couple of millisecond, the error is set to zero again. The controller performance seems to good for disturbance rejection.

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