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Control and Design of Microgrid Components - Power Systems ...

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Isl<strong>and</strong>, Setpoints are 90% <strong>and</strong> 10% <strong>of</strong> Unit Rating, Setpoint Change<br />

F<br />

1<br />

Utility<br />

System P<br />

1<br />

F<br />

2<br />

Event:<br />

Setpoint F2<br />

Change<br />

4 wire<br />

75yd<br />

P 2<br />

L 4 wire<br />

3<br />

L<br />

4<br />

25yd<br />

Event shows Unit 2 backing <strong>of</strong>f from zero output power after feeder flow setpoint <strong>of</strong> Unit 2 has been changed.<br />

Parallel Configuration, <strong>Control</strong> <strong>of</strong> F<br />

1<br />

<strong>and</strong> F<br />

2<br />

1<br />

A<br />

F = 0.22 pu<br />

2<br />

B<br />

F = -0.1 pu<br />

P [pu] 0.6 = 75% 0.46 = 57%<br />

P [pu] 0.0 0.14 = 18%<br />

2<br />

Frequency<br />

[Hz]<br />

Load Level<br />

[pu]<br />

Grid Flow<br />

[pu]<br />

60.075 60.162<br />

0.6 = 75% 0.6 = 75%<br />

0.0 0.0<br />

2<br />

Intermediate Bus (Load L<br />

3<br />

) Voltage, 200ms/div.<br />

217

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