Panel#2: A Day in the Life of Planners/Engineers

1© 2008 OSIsoft, Inc. – All Rights ReservedPI T&D Users Group

Steve Lathrop, PacifiCorp

Panel#2: A Day in the Life of Panel#2: A Day in the Life of Planners/EngineersPlanners/Engineers

Panel#2: A Day in the Life of Panel#2: A Day in the Life of Planners/EngineersPlanners/Engineers

2008 PI T&D Users Group Meeting, Atlanta, Sept 10-12


AgendaAgenda

Area Planning at PacifiCorp Infrastructure Planning Load Duration Curves – a New View of Data Non-SCADA Asset Loads SCADA Accuracy


Area PlanningArea Planning

Substation, sub-transmission and non-Main Grid transmission infrastructure

Future Infrastructure needs (long-range planning) Daily Operations Issues Asset load analysis Load projections Capital spending Risk-Management data



Watch Lists


Load / Voltage AnalysisLoad / Voltage Analysis

Alphabet soup:– Real-time– Historical– Projected– Peak– Instantaneous– Average– Changing

….the differentiator between these is…Time


Infrastructure PlanningInfrastructure Planning

Area Coincident Loads– Six transformers serve this area

• Can I accurately determine area peak load and growth?



Area Coincident Loads—Load profiles for the six:

FIREHOLE T1 MVA HR AVG.Value


RKS_T1_MVA 1-HR AVG.Value


VET T1 MVA HOURLY AVG.Value


Plot-0

7/1/2008 12:00:00 AM 8/15/2008 12:00:00 AM45.00 days

5

10

15

20

0

25

2.32103

4.61375

7.69536

7.16854

9.03582

6.88171



Area Coincident Loads—Projected loads



Area Coincident Loads—Add all loads coincidentally







RKS+FRH+VET MVA HOURLY AVG.Value

Plot-0

7/1/2008 12:00:00 AM 8/15/2008 12:00:00 AM45.00 days

10

20

30

40

50

60

70

0

75

36.5846

2.32103

4.61375

7.69536

7.16854

9.03582

6.88171



Area Coincident Loads—Projected growth of area load



Load Projections– Multiple Load Duration Tool v1.1


Load Duration CurvesLoad Duration Curves

Time-Series data converted to time-independent data– Simplifies analysis– Non-engineers understand it



Demonstrate peak loads, duration of peaks and how many hours load limits are exceeded



Rearrange data: load-dependent, not time-dependent


Non-SCADA Asset LoadsNon-SCADA Asset Loads

Substation C has no electronic metering. Can I get load profile data for it?– My Power Flow suggests 1 MW losses total for line

sections 1-4 at peak load

A

B

C D1

2

3 4

?

SCADASCADA

CIS

Source



Substation C load is approximated by:

Sub C = Sub A – Sub B – Sub D – 1 MW

SCADASCADA

CIS

A

B

C D1

2

3 4

~

Source



CHAPPEL-BIG PINEY LINE 78.Value

PINEDALE AVG MW.Value

BIG PINEY CALC, 1-HR AVG.Value

Plot-0

1/1/2008 12:00:00 AM 7/1/2008 12:00:00 AM181.96 days

5

10

15

20

25

30

35

0

40

4.90707

5.206

11.1131

Black trace is my ‘pseudo-SCADA’ load profile


Verify SCADA AccuracyVerify SCADA Accuracy

Transformer appeared to be overloaded

PLATTE #4 T-3532_SINC_MVA 1-HR AVG.Value

Plot-0

7/8/2007 12:00:00 AM 7/15/2007 12:00:00 AM7.00 days

5

10

15

20

25

0

3019.6244

20-MVA loading guideline

105% loading



PLT 115KV MW SUM HOURLY AVG.Value

PLT T-3513, 230-115 MVA HOURLY AVG.Value

PLT 115KV ERROR MVA.Value

Plot-0

7/8/2007 12:00:00 AM 7/15/2007 12:00:00 AM7.00 days

10

20

30

40

50

60

70

0

80

6.13779

62.7938

68.9315



PLT 115KV MW SUM HOURLY AVG.Value

PLT T-3513, 230-115 MVA HOURLY AVG.Value

PLT 115KV ERROR MVA.Value

PLATTE #4 T-3532_SINC_MVA 1-HR AVG.Value

Plot-0

7/8/2007 12:00:00 AM 7/22/2007 12:00:00 AM14.00 days

10

20

30

40

50

60

70

0

80

10.9807

-0.03728

29.1733

29.1360

‘Problem’ surfaced

Error ‘Tag’ built

Transducer Change-out

Error goes to zero



Questions?

[email protected]

Panel#2: A Day in the Life of Planners/Engineers

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