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Direct Power and Torque Control of AC/DC/AC Converter-Fed ...

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Appendices<br />

R C<br />

= 274KΩ<br />

C = 470µFor 47 µF<br />

R C<br />

C<br />

C<br />

R C<br />

R C<br />

C<br />

C<br />

R C<br />

Fig. A. 4. 6. Modified <strong>DC</strong>-link circuit<br />

The researches on the laboratory setup were carried out under distorted line<br />

voltage condition. Typical THDs <strong>of</strong> the line voltage are presented in Tab. A. 4. 10.<br />

Tab. A. 4. 10. Typical distorted line voltage at the laboratory setup measured by Norma LEM.<br />

% <strong>of</strong> 1 harmonic <strong>of</strong> % <strong>of</strong> 1 harmonic <strong>of</strong> % <strong>of</strong> 1 harmonic<br />

U A (THD 4 %) at U A (THD 4 %) <strong>of</strong> U A (THD 3.4<br />

morning<br />

At afternoon %) At evening<br />

Number <strong>of</strong><br />

Harmonics<br />

5 2.9 2.1 2.2<br />

7 2.7 2.9 2.4<br />

11 1.1 0.9 0.4<br />

13 0.3 0.4 0.1<br />

A.4.4. List <strong>of</strong> Equipment<br />

Tab. A. 4. 11. List <strong>of</strong> equipment<br />

<strong>Power</strong> quality analyzer Norma LEM D6000<br />

Oscilloscope<br />

Tektronix TDS3034B<br />

Oscilloscope<br />

Tektronix TDS3014<br />

Oscilloscope<br />

Tektronix TDS5034B<br />

Voltage differential probe Tektronix P5200<br />

Current probe<br />

Tektronix TCP A300<br />

Current probe<br />

LEM PR30<br />

154

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