Co-locating wind and solar: Combining powers

Craig Chambers

Overview

Wind and solar co-location

1. The concept

2. Benefits and challenges

3. Complementary nature wind and solar resource

4. System sizing and curtailment

5. Heat map and wind farm ranking

6. Summary

1. The concept Co-location of solar PV at existing wind farms

2. Benefits and challenges Benefits

Benefits

Development cost

Land

Grid connection

PPA

Construction time

O&M facilities

Administration

Additional savings can be

obtained when developing

wind and solar power

plants at the same time

as a greenfield

development.

2. Benefits and challenges Challenges

Challenges

Land use

Sizing & Curtailment

Agreements (GCA, PPA, LPA, O&M)

O&M activities

Community

Selected 10 wind farms for analysis

State Wind Farm Capacity

(MW) Yrs of data available

1 NSW Capital 140 4

2 NSW Gunning 47 3

3 SA Waterloo 111 4

4 SA Snowtown 99 4

5 SA Hallett 1 95 4

6 VIC Waubra 192 4

7 VIC Oaklands Hill 67 3

8 WA Collgar 206 3

9 WA Alinta 89 4

10 WA Emu Downs 80 4

3. Complementary nature of solar and wind Time of day analysis

Alinta, WA Snowtown, SA

Average annual profile of two wind farms (2011 – 2014)

Conclusions from the

10 wind farms

analysed:

• 6 showed reasonable

anti-correlation

• Strongest anti-

correlation results in

WA

• Large differences

between and also

within states

3. Complementary nature of solar and wind Seasonal analysis

Waubra, VIC Collgar, WA

Average seasonal profile of two wind farms (2011 – 2014)

Conclusions from the

10 wind farms

analysed :

• 6 generated more in

Spring

• 2 generated more in

Summer but showed

dips during daylight

hours

• 2 generated more in

Winter (both in WA)

4. System sizing and curtailment Curtailment analysis

Solar PV curtailment versus additional solar capacity on each analysed wind farm (2011 – 2014)

100%

25 – 50%

27% curtailment at Snowtown

Conclusions from the 10

wind farms analysed :

- Snowtown and Hallett

wind farm show high

curtailment mainly due to

its high generation during

the day time

- Suitable penetration with

25%-50% of solar @5%

curtailment

- Curtailment did not

exceed 30% when adding

100% of solar PV.

4. System sizing and curtailment Findings Overview

(2) Capacity factors are analysed over the years and

are not altered for maintenance or downtime

+11%

Filters:

- Wind capacity

factor >35%

- Solar capacity

factor >16%

- Solar farm at 35%

of the capacity of

the wind farm

5. Heat map and wind farm ranking Solar and Wind capacity factor map

0.90

0.95

1.00

1.05

1.10

1.15

1.20

0.75 0.85 0.95 1.05 1.15 1.25 1.35 1.45 1.55

Co

st I

nd

ex

Revenue Index

New South Wales South Australia Tasmania Victoria Western Australia

Conclusions:

- Western Australia

provides significant

opportunities

- Victoria and New

South Wales

appear to provide

cost advantages

5. Heat map and wind farm ranking

Ranking of existing wind farms

6. NSW Snapshot C

apit

al W

ind

Far

m

Gu

nn

ing

Win

d F

arm

6. NSW Snapshot (cont.)

Availability of wind and solar

resource

Complementary profile of wind

and solar generation

Cost savings

Revenue opportunities

Agreements and regulations

• Our study demonstrates

that co-location is worth the

consideration of developers

and existing wind farm

owners/operators.

• We encourage developers

to consider both wind and

solar for their respective

sites (operational or in

development)

• Our report is available on

ARENA’s Knowledge Bank

6. Summary Success factors and conclusion

Thank You Craig Chambers Craig.Chambers@aecom.com