SPP Interconnection Checklist

SPP's Interconnection Checklist

Start

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Interconnection Checklist

Step 1

Trained personnel are on site (power plants and substations) to perform/assist with synchronization efforts.

Lines 1-9 of the checklist are completed by the RC in Step 1.

Reliable communications have been established and contact information shared with affected parties

Interconnection Checklist

Step 2

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We evaluate the stability of the existing islands in Step 2.Information is considered for two islands in Lines 10-21.

Knowlege Check

Line 10

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59.96

59.95

YES

Are both islands' frequencies within the preferred range?

NO

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Application Question

Calculation Review

Formula for % difference

For example, for voltages values of 353 kV and 344 kV:Step 1: 353-344=9 Step 2: 353+344=697; 697/2=348.5 Step 3: 9/348.5=0.0258; 0.0258*100=2.58% All: [353 kV – 344 kV] / ((353 kV + 344 kV) / 2) = 0.0258 * 100 = 2.58%

Line 11

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115.9

109

YES

Is the voltage difference within the preferred range?

NO

The next lines deal with Capability, Output, and Total Unloaded Capacity

Let's see what you already know

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Challenge Question

Total Unloaded Capacity

Fleet Capacity MW - Fleet's Actual MW

= Total Unloaded Capacity

Lines 12-14

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795

3580

1522

306

Then, drag and drop the correct values into the corresponding boxes

489 MW

2058MW

1842 MW

2058MW

489 MW

Check my answer

Lines 15-18

Holcomb 1

Tolk

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500

360

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239

200

121 MW

300 MW

61 MW

300MW

121 MW

Check my answer

Challenge Questions

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Challenge Question

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Lines 19-21

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73

351

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351 MW

73 Mw

161 MW

Challenge Questions

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Interconnection Checklist

Step 3

We EVALUATE THE INTERCONNECT in Step 3.This is completed in Lines 22-28.

Lines 22-28

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CB3707 at Liberal_

TBD

Yes

No

Tolk

SECI=FT; SPS=FF

Yes

Interconnection Checklist

Step 4

We evaluate the RESULTING ISLAND in Step 4.This is completed in Lines 29-37.

Lines 29-34

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4375

2547

Holcomb at 239

485

485

Lines 35-37

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Verify total dynamic reserve (Line 34) equals or exceeds the largest contingency (Line 31). YES or NO

35

Balancing Areas must agree on scheduled interchange; flow should be maintained near zero if only one tie line.

36

As islands grow, AGC modes, reserves, tie line flows, etc. need to be reviewed with all Balancing Authorities, Transmission Operators, and Balancing Authorities (if control has been transferred back to the Balancing Authority).

37

Interconnection Checklist

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Step 5

Step 5 is the RC's approval of the interconnection.This is completed on Line 38.

Lines 39-42

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Additional Notes

39

Establish additional tie lines as soon as possible.

Each entity should not pick up more than 5% of online capacity without notification to the RC.

40

Balancing Authorities shall agree on scheduled interchange; flow should be maintained near zero if only one tie line.

41

As islands grow, AGC modes, reserves, tie line flows, etc. need to be reviewed with all island Transmission Operators periodically.

42

The End