Vattenfall Vesterhav Projects
Transcript of Vattenfall Vesterhav Projects
Grid connection characteristics
Vattenfall Vesterhav Projects
31-10-18, Kenneth Skaug System Design, Vattenfall WindFarm Design
31/10/2018
Confidentiality – None (C1) 1
Agenda
1. Vesterhav site conditions
2. Grid connection at 150 kV Transmission
3. Grid connection definition
4. Grid code – V/Q example
5. Wind power plant characteristic
6. Voltage control scheme
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Concession areas:Danish nearshore projects
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Vesterhav South (VS)
Vesterhav North (VN)
Vesterhav north site conditions
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Vesterhav south site conditions
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Grid connection at 150 kV transmission
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Confidentiality – Critical (C4), High (C3), Medium (C2), None (C1) 6
Grid connection
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Vesterhav North
Rating 180 MW
WTG 21 x SG8.4-167
Grid connection 150 kV Engbjerg (ENG)
SCR 12-25 (2021)
Vesterhav South
Rating 170 MW
WTG 20 x SG 8.4-167
Grid connection 150 kV Søndervig (SVG)
SCR 10-20 (2021)
Principal grid layout
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Onshore
cable
150 kV
66 kV
150 kV cable
150 kV
Onshore
cable
Offshore
cable
Offshore
cable
Offshore cable Onshore cable Onshore substation Onshore transmission
Grid connection defintion
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Onshore
cable
150 kV
66 kV
150 kV cable
150 kV
Onshore
cable
Offshore
cable
Offshore
cable
POC PCC
POC: The point in the public electricity supply grid where the wind power plant is or can be connected
PCC: The point in the public electricity supply grid where consumers are or can be connected
60 kV
Voltage reference point
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Onshore
cable
150 kV
66 kV
150 kV cable
150 kV
Onshore
cable
Offshore
cable
Offshore
cable
POC PCC
The voltage reference point is either in the Point of Connection (POC), the Point
of Common Coupling (PCC) or a point in between.
Voltage
reference
Grid code requirementV/Q example
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Example: V/Q requirement
Energinet TF3.2.5 rev 4. 22.07.2016
V [pu]
Q [pu]
Grid code requirement
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V [pu]
Q [pu]
Data Value
Sn 160 MVA
Uk 12 %
V – HV 150 kV
V – LV 60 kV
POC
150 kV66 kV
P = 1.0 pu
Q={-0.33 – 0.33} pu
V=[0.9 -1.06] pu
V/Q requirement – POC 66 kV
POC
150 kV66 kV
P = 1.0 pu
Q={-0.33 – 0.33} pu
V=[0.9 -1.06] pu
Grid code requirement
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V [pu]
Q [pu]
Data Value
Sn 160 MVA
Uk 12 %
V – HV 150 kV
V – LV 60 kV
PCC
Effective 150 kV V/Q characteristic
POC
150 kV66 kV
P = 1.0 pu
Q={-0.33 – 0.33} pu
V=[0.9 -1.06] pu
Grid code requirement
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V [pu]
Q [pu]
Data Value
Sn 160 MVA
Uk 12 %
V – HV 150 kV
V – LV 60 kV
PCC
Limit on the voltage range ±10% PCC
Grid code requirement
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V [pu]
Q [pu]
Operating the tap changer
V [pu]
Q [pu]
90,0060,0030,000,00-30,00-60,00 [Mvar]
1,08
1,04
1,00
0,96
0,92
0,88
[p.u.]
Pow er Plant VQ Diagram (EN): Q = 0 in Mvar / Voltage at PCC in p.u.
Pow er Plant VQ Diagram (EN): Reactive pow er reference (at Pn) in Mvar / Voltage at PCC in p.u.
Pow er Plant VQ Diagram (EN): Reactive pow er at PCC in Mvar / Voltage at PCC in p.u.
V-Q Diagram
Date: 3/28/2017
Annex: /2
DIg
SIL
EN
T
Wind power plant characteristicPOC performance
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90,0060,0030,000,00-30,00-60,00 [Mvar]
1,08
1,04
1,00
0,96
0,92
0,88
[p.u.]
Pow er Plant VQ Diagram (EN): Q = 0 in Mvar / Voltage at PCC in p.u.
Pow er Plant VQ Diagram (EN): Reactive pow er reference (at Pn) in Mvar / Voltage at PCC in p.u.
Pow er Plant VQ Diagram (EN): Reactive pow er at PCC in Mvar / Voltage at PCC in p.u.
V-Q Diagram
Date: 3/28/2017
Annex: /2
DIg
SIL
EN
T
Wind power plant characteristicPOC performance
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3
1
1
2
2
1. Performance limit
2. Extra capacity
3. Rated voltage
Wind power plant characteristicPCC performance
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60,0040,0020,000,00-20,00-40,00 [Mvar]
1,08
1,04
1,00
0,96
0,92
0,88
[p.u.]
Pow er Plant VQ Diagram (EN): Q = 0 in Mvar / Voltage at PCC in p.u.
Pow er Plant VQ Diagram (EN): Reactive pow er reference (at Pn) in Mvar / Voltage at PCC in p.u.
Pow er Plant VQ Diagram (EN): Reactive pow er at PCC in Mvar / Voltage at PCC in p.u.
V-Q Diagram
Date: 3/16/2017
Annex: /2
DIg
SIL
EN
T
• Combining the tap changer
operation with voltage
control on the 150 kV side.
• Utilises the Wind power
plant capacity for grid
support
• Optimum operation of the
wind power plant
150 kV66 kV
V=[0.9 -1.06] puQ={-0.33 – 0.33} pu
Principal voltage control scheme
150 kV
66 kV
WFC
AVR
AVR
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Voltage control in remote area
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