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Advantages of Wind and Solar Co-location
Steven Nethery | 17th March 2016
Market advantages of co-locating utility scale wind and solar generation
Summary
1. Advantages of Co-location
2. Wind & Solar Projects of Goldwind
3. Generation and Grid Characteristics
4. Sources of Cost Savings from Co-location
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Project development
• Use existing environmental studies
• Build on community engagement
• Possible add-on to existing PPA & Finance
• Use existing landowner relationships
Savings achieved by sharing existing infrastructure
• Grid Substation & Switchyard
• Roads
• Buildings
Complimentary generation allows improved
utilisation of connection assets
1. The Advantages of Co-location
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2.1 Gullen Range Wind & Solar Hybrid
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185 MW Total Generation
• 165.5MW wind existing
• 10-12 MW solar planned
30km northwest of Goulburn
Gullen Solar – 30~40 ha
Connection to Transgrid 330kV transmission system
2.2 White Rock Wind & Solar Hybrid
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195MW Total Generation• 175 MW wind planned• 20 MW solar planned
35km west of Glen Innes
White Rock Solar - 50ha
Connection to Transgrid 132kV transmission• 170 MW export capability
Shortlisted for ARENA Tender
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Ene
rgy
Yie
ld (
GW
h)
High wind generation during Winter months at Gullen Range
Wind
Solar
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Ener
gy Y
ield
(G
Wh
)
High wind generation months align with Summer & Winter months at White Rock
Wind
Solar
3.1 Annual Complimentary Generation
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3.2 Average Time of Day Power Outputs
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Diurnal complimentary generation at WRWF
Gullen Range White Rock
Ave
rage
op
utp
ut W
ind
((M
W)
hour
Wind+Solar Wind Solar
Day
Ave
rage
op
utp
ut W
ind
((M
W)
hour
Wind+Solar Wind Solar
Day
WRWF 132kV grid capacity limited by network thermal rating
0
20
40
60
80
100
120
140
160
180
200
0% 20% 40% 60% 80% 100%
White Rock Wind/Solar Hybrid vs. Transmission Limit
Transmission Limit
Wind + 20MW Solar
3.3 Curtailment Analysis of White Rock
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3.4 Curtailment Analysis of Gullen Range
9Gullen Range grid capacity limited by 90 MVA transformer size (1 of 2)
0
20
40
60
80
100
120
140
160
180
200
0% 20% 40% 60% 80% 100%
Gullen Range Wind/Solar Hybrid vs. Transmission Limit
Wind + 11 MW Solar
Transmission Limit
Copyright © Goldwind Science & Technology Co., Ltd
4. Sources of Cost Savings from Co-location
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Infrastructure Savings by Sharing:• Access tracks
• Buildings
• Communications / Scada
• Substation
Grid Connection Savings:• Stronger shared transmission connection
• Less reactive plant
• Grid negotiation mostly complete
Development Savings• Existing knowledge
• Developed engagement plans
• Additional benefit for landowners
Stand Alone66kV
Stand Alone22kV
Build Windthen build Solar
Build Wind &Solar together
Co
sts
Infrastructure Costs Grid Connection Costs Development Costs
Project development
Savings achieved by sharing existing infrastructure
Complimentary generation allows improved utilisation of connection assets
Wind & Solar Hybrids reduce market costs
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