symbolic dynamic models for highly varying power system loads
symbolic dynamic models for highly varying power system loads
symbolic dynamic models for highly varying power system loads
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101<br />
C.1 Real data used in the proposed work<br />
In Chapter 4, real EAF data were used to test the model. The real data were<br />
obtained from an electric arc furnace. These data are the recorded values of per phase<br />
voltage and current with a sampling frequency of 10 kHz. Table C.1 shows the sample<br />
values of EAF voltage and current <strong>for</strong> all the phases. An overall CT ratio of 400 and PT<br />
ratio of 8750 are utilized to obtain the actual current and voltage values respectively.<br />
Figures C.1, C.2, and C.3 show 60 cycles of EAF phase A, phase B, and phase C current<br />
respectively. These current values represent secondary side CT current in amps. A<br />
schematic of the arc furnace is shown in Figure C.4.<br />
(Time is shown in ‘points’. One point = 0.1 ms)<br />
Phase A EAF current<br />
8<br />
6<br />
CT current (A)<br />
4<br />
2<br />
0<br />
-2<br />
-4<br />
1<br />
556<br />
1111<br />
1666<br />
2221<br />
2776<br />
3331<br />
3886<br />
4441<br />
4996<br />
5551<br />
6106<br />
6661<br />
7216<br />
7771<br />
8326<br />
8881<br />
9436<br />
9991<br />
-6<br />
-8<br />
time<br />
Figure C.1 A sample of EAF current <strong>for</strong> phase A
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