DG Technology

Sub-case Number

Results Figure

Islanding

Scenario

Islanding

Attempt

Comment

Diesel

A1

Figure 2

Planned

Succeeded

-

A2

Figure 3

Unplanned

Failed

Voltage and frequency limit violation

Gas

B1

Figure 4

Planned

Conditional Success

Frequency limit adjusted to t>5.2 sec

B2

Figure 5

Unplanned

Failed

Voltage and frequency limit violation

Hydro

C1

Figure 6

Planned

Conditional Success

Frequency limit adjusted to t>9.6 sec

C2

Figure 7

Unplanned

Failed

Voltage and frequency limit violation

Wind & Diesel

D1

Figure 9

Planned

Conditional Success

Islanding is not recommended for prolonged periods to avoid DG rotor over-heating

Wind & Gas

D2

Figure 10

Planned

Failed

Lower frequency limit violation

Wind & Hydro

D3

Figure 11

Planned

Failed

Upper and lower frequency limits violation