X hits on this document

PDF document

Master of Science Thesis in Electric Power Engineering - page 66 / 114

362 views

0 shares

3 downloads

0 comments

66 / 114

VOLTAGE ORIENTED CONTROL – SIMULATION

¬ Grid voltage

(Line to Line) (Phase to Ground)

√2

(Phase to Ground amplitude)

¬ Minimum DC link voltage The minimum DC link voltage is found with the equation (2.27) of section “2.2.3 Limitations”.

.

This minimum value have been verify in our simulation. In the Simulink simulation, we found a minimum DC link voltage around 660V. Finally, for our simulation we will select

This value is probably a bit low for an experiment. In reality, it will be better to select 15% or 20% more (about 750V or 790V. Refer to “2.2.3 Limitations”).

¬ Inductance value The equation (2.29) of section “2.2.3 Limitations” applied in our system becomes :

3

As we saw during the voltage controller design, section “3.5.2 Design of voltage controller

equation (3.18), the d current is calculated by 2

Then, in steady state we can write the equality of power

(3.62)

Finally, the current becomes

2

(3.63)

2 3

700

This value is totally verified in the following simulation. We can now calculate the inductance.

3

700 3

We think that this value too high according to results read in some papers. We decided to select the inductance around 3mH (it could be 5mH or 10mH).

57

Document info
Document views362
Page views370
Page last viewedSat Dec 10 09:31:05 UTC 2016
Pages114
Paragraphs2263
Words17018

Comments