Environmental Engineering Reference
In-Depth Information
Table 4.4 Design load cases to [11] Table 4.3.1
DLC Wind conditions
b)
Design
situation
Sea state conditions
Other conditions
Limit
state
Partial
safety
factors
1. Power
production
1.1
NTM
V
in
V
hub
V
out
Irregular sea state: H
s
(V) or
taken from scatter diagram
UN
a)
1.2
NTM
V
in
V
hub
V
out
Irregular sea state: H
s
(V) or
taken from scatter diagram
F
1.3
ECD
V
in
V
hub
V
r
H
¼
H
s
(V)
U
E
1.4
NWP
V
in
V
hub
V
out
H
¼
H
s
(V)
External electrical
fault
UN
1.5
EOG
1
V
in
V
hub
V
out
H
¼
H
s
(V)
Grid loss
U
N
1.6
EOG
50
V
in
V
hub
V
out
H
¼
H
s
(V)
U
E
1.7
EWS
V
in
V
hub
V
out
H
¼
H
s
(V)
U
E
1.8
EDC
50
V
in
V
hub
V
out
H
¼
H
s
(V)
U
E
1.9
ECD
V
in
V
hub
V
r
H
¼
H
s
(V)
U
E
a)
/E
1.10
NWP
V
in
V
hub
V
out
H
¼
H
s
(V)
Ice formation on rotor
blades
F/U
1.11
Thermal actions, if applicable
U
E
1.12
Earthquake, if applicable
U
A
a)
1.13
NWP
V
hub
¼
V
r
or V
out
H
¼
H
s
(V)
Grid loss
F
a)
/E
1.14
NWP
V
hub
¼
V
r
or V
out
Sea ice
F/U
1.15
NWP
V
hub
¼
V
r
or V
out
H
¼
H
max,1
or H
s
(V)
U
N
2. Power
production
plus fault
2.1
NWP
V
in
V
hub
V
out
H
¼
H
s
(V)
Fault in control system U
N
2.2
NWP
V
in
V
hub
V
out
H
¼
H
s
(V)
Fault in safety system
or prior electrical
failure
UA
a)
2.3
NTM
V
in
V
hub
V
out
Fault in control or
safety system
F
a)
3. Start-up
3.1
NWP
V
in
V
hub
V
out
H
¼
H
s
(V)
F
3.2
EOG
1
V
in
V
hub
V
out
H
¼
H
s
(V)
U
N
3.3
EDC
1
V
in
V
hub
V
out
H
¼
H
s
(V)
U
N
a)
4. Normal
shutdown
4.1
NWP
V
in
V
hub
V
out
H
¼
H
s
(V)
F
4.2
EOG
1
V
in
V
hub
V
out
H
¼
H
s
(V)
U
N
5. Emergency
shutdown
5.1
NWP
V
in
V
hub
V
out
H
¼
H
s
(V)
U
N