Environmental Engineering Reference
In-Depth Information
Table 4.1 Design load cases according to DIBt guideline [9] Table 1
Operating conditions (with
ref. to section 7.4.x of DIN
EN 61400-1:2004
a)
)
DLC
Wind condition
Other conditions
DLC
group
1.0
b)
1. Power production (7.4.1)
NTM
V
in
V
hub
V
out
Action effects with a
frequency of exceedance
>
N
10
4
1.1
NTM
V
in
V
hub
V
out
N
1.2
NTM
V
in
V
hub
V
out
F
1.3
ECD
V
hub
¼
V
r
N
V
hub
¼
V
r
or V
out
1.4
NWP
External electrical fault
N
1.5
EOG
1
V
hub
¼
V
r
or V
out
Grid loss
N
1.6
EOG
50
V
hub
¼
V
r
or V
out
N
1.7
EWS
V
hub
¼
V
r
or V
out
N
1.8
EDC
50
V
hub
¼
V
r
or V
out
N
1.9
ECG
V
hub
¼
V
r
N
1.10
b)
NWP
V
hub
¼
V
r
Ice loads
F
1.11
b)
NWP
V
hub
¼
V
r
or V
out
Thermal actions
N
1.12
b)
NWP
V
hub
¼
V
r
or V
out
Earthquake
A
V
in
V
hub
V
out
2. Power production plus
fault (7.4.2)
2.1
NWP
Failure of control system
N
2.2
NWP
V
in
V
hub
V
out
Failure of control system
or prior electrical fault
A
2.3
NTM
V
in
V
hub
V
out
Failure of control or
safety system
F
3. Start-up (7.4.3)
3.1
NWP
V
in
V
hub
V
out
F
3.2
EOG
1
V
hub
¼
V
in
,V
r
or V
out
N
3.3
EDC
1
V
hub
¼
V
in
,V
r
or V
out
N
4. Normal shutdown (7.4.4)
4.1
NWP
V
in
V
hub
V
out
F
4.2
EOG
1
V
hub
¼
V
r
or V
out
N
5. Emergency shutdown
(7.4.5)
5.1
NWP
V
hub
¼
V
r
or V
out
N
5.2
b)
NWP
V
hub
¼
V
r
or V
out
Earthquake
A
6.0
b)
V
hub
¼
V
m,1
(h)
c)
6. Parked (standstill or
idling) (7.4.6)
NWP
N
50-year return period
c)
6.1
EWM
N
50-year return period
c)
6.2
EWM
Grid loss
A
1-year return period
c)
6.3
EWM
N
V
hub
0.7
V
m,50
(h)
c)
6.4
NTM
F
6.5
b)
V
hub
¼
V
m,50
(h)
c)
EDC
50
Ice loads
A
6.6
b)
V
hub
¼
V
m,1
(h)
c)
NWP
Thermal actions
N
1-year return period
c)
7. Parked after a fault (7.4.7) 7.1
EWM
A
8. Transport, erection,
maintenance and
repairs (7.4.8)
8.1
To be specified by the manufacturer
T
8.2
b)
Vortex-induced transverse
vibrations
F
a
)
The respective section of DINEN 61400-1 is also valid for the additional design load cases of the corresponding operating condition.
b
)
Design load case to be considered in addition to DIN EN 61400-1.
c
)
Wind conditions to DIN 1055-4.
