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V112
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Document no.: 0006-6958 V00
V112-3.0 MW Electrical Description
Technical Description and Data Manual
Date: 2010-03-10
Issued by: Technology R&D Class: 2
Type: T09 - Manual Page 1 of 14
Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
QM
S 0
0085 V
00
V112-3.0 MW Electrical Description Technical Description and Data Manual
History of this Document
Version
no.
Date Description of changes Technical
approver
00 2010-03-10 First edition.
Technical approver for chapter 2+5. JARNE
Technical approver for chapter 3+4. JNIES
Technical approver for chapter 7+8+9. KESKA
Table of Contents
1 Introduction .......................................................................................................................... 2 1.1 Purpose of Manual ................................................................................................................. 2 1.2 Qualifications and Training Programme ................................................................................. 2 1.3 Contact Addresses................................................................................................................. 2 1.4 Symbols and Conventions ..................................................................................................... 2 1.5 Safety Notes .......................................................................................................................... 2 1.6 Abbreviations and Terms ....................................................................................................... 3 1.7 Reference Documents ........................................................................................................... 3 1.7.1 Documents ............................................................................................................................ 3 1.7.2 Drawings ................................................................................................................................ 3 1.7.3 Electrical Diagrams ................................................................................................................ 3 2 High-Voltage Grid Connection ............................................................................................ 3 2.1.1 Grid Connection Data ............................................................................................................ 4 3 The Switchgear Module ....................................................................................................... 4 3.1.1 The Circuit Breaker Panel (CBP) ........................................................................................... 4 3.1.2 The Switch Disconnector Panel (SDP) ................................................................................... 6 3.1.3 High-Voltage Level Range and Internal Arc Classification ...................................................... 6 3.1.4 Rated Nominal Current for Main Busbar ................................................................................ 6 3.1.5 Technical Data ....................................................................................................................... 7 3.1.6 Switchgear Motorisation ......................................................................................................... 8 4 High-Voltage Cables ............................................................................................................ 8 5 Turbine Transformer ............................................................................................................ 8 5.1 Transformer Data ................................................................................................................... 8 5.1.1 Basic Transformer Data ......................................................................................................... 8 5.1.2 Transformer 10.5 kV 50 Hz .................................................................................................... 9 5.1.3 Transformer 20 kV 50 Hz ..................................................................................................... 10 5.1.4 Transformer 33 kV 50 Hz ..................................................................................................... 11 6 The Vestas Earthing System / Lightning Protection ....................................................... 12 7 Turbine Marking ................................................................................................................. 12 8 Short Circuit Protection ..................................................................................................... 12 9 Monitoring of the Grid ....................................................................................................... 14
VESTAS PROPRIETARY NOTICE: This document contains valuable confidential information of Vestas Wind Systems A/S. It is protected by copyright law as an unpublished work. Vestas reserves all patent, copyright, trade secret, and other proprietary rights to it. The information in this document may not be used, reproduced, or disclosed except if and to the extent rights are expressly granted by Vestas in writing and subject to applicable conditions. Vestas disclaims all warranties except as expressly granted by written agreement and is not responsible for unauthorized uses, for which it may pursue legal remedies against responsible parties.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
Date: 2010-03-10
Issued by: Technology R&D Class: 2
Type: T09 - Manual Page 2 of 14
Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
1 Introduction
This document applies to the following equipment supplied by Vestas Wind
Systems A/S (VWS):
Turbine
V112–3.0 MW
Table 1-1: Turbine type.
1.1 Purpose of Manual
This manual describes the high-voltage electrical systems in general for the
turbines described in chapter 1.
The contents of this document are subject to change without notice.
1.2 Qualifications and Training Programme
Not applicable for this manual.
1.3 Contact Addresses
Head office:
Vestas Wind Systems A/S
Alsvej 21
8940 Randers SV
Denmark
Telephone: +45 97 30 00 00
Local contact:
1.4 Symbols and Conventions
Not applicable for this manual.
1.5 Safety Notes
Not applicable for this manual.
NOTE
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
Date: 2010-03-10
Issued by: Technology R&D Class: 2
Type: T09 - Manual Page 3 of 14
Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
1.6 Abbreviations and Terms
Abbreviations which relate to specific, detailed technical specifications and terms
are not spelled out.
Abbreviation/Term Spelled-out form/explanation
CBP Circuit Breaker Panel.
SDP Switch Disconnector Panel.
VWS Vestas Wind Systems.
Table 1-2: Abbreviations.
1.7 Reference Documents
1.7.1 Documents
0000-3388 Vestas Earthing System.
961636 Vestas Earthing System – Equipotential Connections On Cables.
960453 Quality Control of Equipotential Connections On Cables.
0007-9455 Earthing System (Standard Gravity P&H Foundation).
0009-0750 Foundation Earthing.
0009-8026 Earthing Between Turbines.
944430 Lightning Protection System.
1.7.2 Drawings
75942520 Embedment V112
1.7.3 Electrical Diagrams
0005-1681 3MW V112 EDSA SINGLE LINE DIAGRAM
2 High-Voltage Grid Connection
The turbine can be connected to the grid in the range from 6 kV to 35 kV, where
41.5 kV (Um) is the highest equipment voltage.
The grid cables are led into the turbine through a tube in the turbine foundation
and connected to the switchgear module.
The grid voltage must be within ±10%. Steady variations within +1/-2 Hz are
acceptable. Intermitted or rapid fluctuations of the grid’s frequency may cause
serious damage to the turbine.
On average, grid dropouts must only take place once a week in the course of the
turbine’s lifetime.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
Date: 2010-03-10
Issued by: Technology R&D Class: 2
Type: T09 - Manual Page 4 of 14
Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
2.1.1 Grid Connection Data
Grid Connection Data Value
Nominal Phase Voltage (UP, nom) Nominal high-voltage levels
Nominal Frequency (Fnom) 50 Hz
Maximum Steady State Voltage Jump ±2 %
Maximum Frequency Gradient ±4 Hz/sec.
Maximum Negative Sequence Voltage 3 %
Table 2-1: Grid Connection Data.
3 The Switchgear Module
The switchgear module is located at the tower bottom.
The switchgear module consists of a CBP followed by a number of SDPs
depending on the number of in/outgoing high-voltage cables. If decided/needed,
a double T-connection can be applied in each SDP.
The total number of SDPs can be 3, meaning that the total number of panels are
4 (1xCBP+3xSDP).
3.1.1 The Circuit Breaker Panel (CBP)
Figure 3-1: Circuit breaker and three-
position disconnector. Figure 3-2: Circuit breaker and two-
position disconnector with a separate earthing switch.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
Date: 2010-03-10
Issued by: Technology R&D Class: 2
Type: T09 - Manual Page 5 of 14
Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
Figure 3-3: Circuit breaker in
combination with a disconnector.
Figure 3-4: Circuit breaker and three-position disconnector (upstream).
The CBP is a combination of a circuit breaker and either a three-position
disconnector or a two-position disconnector with a separate earthing switch.
Refer to Figure 3-1, p. 4, Figure 3-2, p. 4, Figure 3-3, p. 5 and Figure 3-4, p. 5.
By means of a flexible high-voltage cable, the CBP is connected to the
transformer located in the nacelle.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
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Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
3.1.2 The Switch Disconnector Panel (SDP)
Figure 3-5: Three-position load break
switch-disconnector. Figure 3-6: Two-position load break
switch-disconnector with a separate earthing switch.
The SDPs are equipped with either a three-position load break switch-
disconnector (refer to Figure 3-5, p. 6) or a two-position load break switch-
disconnector with a separate earthing switch (Figure 3-6, p. 6).
The SDPs are connected to the in/outgoing high-voltage grid cables.
The SDPs are mainly used to separate or connect the next turbine.
3.1.3 High-Voltage Level Range and Internal Arc Classification
Rated Voltage
(Maximum
voltage)
Nominal
Operating
Voltage
Internal Arc
Classification
Tested According
to Classification
24 kV 10.0-22.0 kV IAC AFL 20 kA, 1s Switchgear
vessel/tank + cable
compartment
36 kV 22.1-33.0 kV IAC AFL 25 kA, 1s Switchgear
vessel/tank + cable
compartment
40.5 kV 33.1-35.0 kV IAC AFL 25 kA, 1s Switchgear
vessel/tank + cable
compartment
Table 3-1: High-voltage level range and internal classification.
3.1.4 Rated Nominal Current for Main Busbar
The rated nominal current for the main busbar is 630 A.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
Date: 2010-03-10
Issued by: Technology R&D Class: 2
Type: T09 - Manual Page 7 of 14
Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
3.1.5 Technical Data
Rated voltage (maximum voltage). kV 24 36 40.5
Rated frequency. Hz 50/60 50/60 50/60
Rated power frequency withstand voltage “phase-to-phase, phase-
to-earth”.
kV
50 70 85
Rated power frequency withstand voltage “across the isolating
contact”.
kV
60 80 90
Rated lightning impulse withstand voltage “phase-to-phase, phase-
to-earth”.
kV
125 170 185
Rated lightning impulse withstand voltage “across the isolating
contact”.
kV
145 195 215
Rated peak withstand current. kA
2.5 times rated short-
time withstand current.
Rated short-circuit making current. kA 2.5 times rated short-
time withstand current.
Circuit breaker switching capacity:
Electrical endurance classification for rated breaking current. E1
Electrical endurance classification for short-circuit breaking
current.
E1
Mechanical endurance classification. M1
Load-break switch-disconnector switching capacity:
Electrical endurance classification for rated breaking current. E3 E1 E1
Electrical endurance classification for short-circuit breaking
current.
E3 E1 E1
Mechanical endurance classification. M1 M1 M1
Disconnector switching capacity:
Electrical endurance classification for short-circuit breaking
current.
E2
Mechanical endurance classification. M0
Earthing switch switching capacity:
Electrical endurance classification for short-circuit breaking
current.
E2
Mechanical endurance classification. M0
Ambient temperature:
For operation. -35° to +50°
For survival. -40° to +60°
Switchgear installation altitude above sea level. 2000 m.a.s.l.
Degree of protection:
Primary part (main circuit). IP65
Operating mechanisms (behind front cover). IP2X
Front cover and LV compartment. IP2X
Corrosion protection class. C3
Table 3-2: Technical data.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
Date: 2010-03-10
Issued by: Technology R&D Class: 2
Type: T09 - Manual Page 8 of 14
Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
3.1.6 Switchgear Motorisation
The switchgear module is equipped with motorisation for the load break switch-
disconnector in each SDP and for the circuit breaker in the CBP. The earthing
switch in each panel is not motorised.
Motor rating 24 VDC
Table 3-3: Motor rating.
4 High-Voltage Cables
The switchgear module and the turbine transformer are connected by means of a
high-voltage cable.
The cable is designed according to IEC 60502-2 and IEC 60840.
The cable has a conductor cross section of 3x70/70 mm2 Cu, where each three-
phase conductor is 70 mm2 and the earth conductor is 70 mm2. The cable is
delivered on site with terminations intended to connect to both the transformer
high-voltage side and the switchgear module.
5 Turbine Transformer
The turbine transformer is located in a dedicated and locked transformer room in
the nacelle.
The transformer room is equipped with four arc detection devices. In case a fault
is detected, the switchgear module (located at the tower bottom) will disconnect
the power supply to the transformer.
The transformer is a three-phase dry-type transformer which is self-extinguishing.
The high-voltage side of the transformer is connected to the circuit breaker panel,
located at the tower bottom, by means of flexible high-voltage cables.
Surge arresters are installed on the high-voltage side and the low-voltage side of
the transformer.
Surge arresters for the low-voltage side of the transformer are located on the low-
voltage busbar between the low-voltage switchboard and the transformer.
The low-voltage side of the transformer is connected to a circuit breaker by
means of flexible cables. The circuit breaker functions as a protection of the
turbine generator.
5.1 Transformer Data
5.1.1 Basic Transformer Data
Three-phase transformer.
Temperature monitoring of the transformer winding by PT100 sensor (two per
phase).
Temperature monitoring of the transformer core by PT100 sensor (two per
phase).
High-voltage surge arresters are installed on both the high-voltage side and
the low-voltage side.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
Date: 2010-03-10
Issued by: Technology R&D Class: 2
Type: T09 - Manual Page 9 of 14
Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
Transformer design, manufacturing, routine tests and tolerances are
according to IEC standard 60076-11 and HD 637 S1: 1999.
5.1.2 Transformer 10.5 kV 50 Hz
Transformer data, 10.5 kV 50 Hz
Rated power 650V : Sr = 3350 kVA (AF - Air Forced)
Frequency : f = 50 Hz
Primary voltage : U = 10500 V
Secondary voltage : Us = 650 V
No load losses : P0 ≤ 6.6 kW
Impedance losses at rated load (120°C) : Pl(120°C) ≤ 24.5 kW
Impedance voltage 650V, 3350kVA : ek ≥ 8 %
Short circuit current 650V, 3350kVA : Imax,3p ≤ 21 kA
Full load current at 10.5 kV : I10,5kV = 184/205 A (Cos=1/0,96)
Enclosure protection : = IP00
Corrosion protection : = C4 according to ISO 9223
Tap changer : ntp = ±2x2,5 %
Highest equipment voltage : Um = 12 kV
Power frequency voltage (50 Hz,1 min.) : Ud = 28 kV (RMS)
Lightning impulse voltage BIL (1,2/50 µs) : Up = 75 kV
LV clearance voltage : = 1.1 kV
LV test voltage (50 Hz, 1 min.) : = 3 kV
Connection : = Dyn5 or optional Dyn11 and
YNyn0
Weight : < 8500 kg
Max. ambient temperature : = 50°C
Max. daily average temperature : = 40°C
Max. yearly average temperature : = 30°C
Max. temperature rise (hotspot) : T(Pt100) = 80 K
Cut out of generator (hotspot) : T(Pt100) = 125°C
Cut out of HV-grid (hotspot) : T(Pt100) = 140°C
Temperature class : = F
Environment class : = E2
Climate class : = C2
Fire behaviour class : = F1
Maximum allowable installation height : = 2000 m above sea level
Table 5-1: Transformer data, 10.5 kV 50 Hz.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
Date: 2010-03-10
Issued by: Technology R&D Class: 2
Type: T09 - Manual Page 10 of 14
Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
5.1.3 Transformer 20 kV 50 Hz
Transformer data, 20 kV 50 Hz
Rated power 650V : Sr = 3350 kVA (AF - Air Forced)
Frequency : f = 50 Hz
Primary voltage : U = 22000 V
Secondary voltage : Us = 650 V
No load losses : P0 ≤ 6.6 kW
Impedance losses at rated load (120°C) : Pl(120°C) ≤ 24.5 kW
Impedance voltage 650V, 3350kVA : ek ≤ 8 %
Short circuit current 650V, 3350kVA : Imax,3p ≤ 21 kA
Full load current at 20 kV : I20kV = 97/108 A (Cos=1/0,96)
Enclosure protection : = IP00
Corrosion protection : = C4 according to ISO 9223
Tap changer : ntp = ±2x2.5 %
Highest equipment voltage : Um = 24 kV
Power frequency voltage (50 Hz,1 min.) : Ud = 45 kV (RMS)
Lightning impulse voltage BIL (1,2/50 µs) : Up = 125 kV
LV clearance voltage : = 1.1 kV
LV test voltage (50 Hz, 1 min.) : = 3 kV
Connection : = Dyn5 or optional Dyn11 and
YNyn0
Weight : < 8500 kg
Max. ambient temperature : = 50°C
Max. daily average temperature : = 40°C
Max. yearly average temperature : = 30°C
Max. temperature rise (hotspot) : T(Pt100) = 80 K
Cut out of generator (hotspot) : T(Pt100) = 125°C
Cut out of HV-grid (hotspot) : T(Pt100) = 140°C
Temperature class : = F
Environment class : = E2
Climate class : = C2
Fire behaviour class : = F1
Maximum allowable installation height : = 2000 m above sea level
Table 5-2: Transformer data, 20 kV 50 Hz.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
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Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
5.1.4 Transformer 33 kV 50 Hz
Transformer data, 33 kV 50 Hz
Rated power 650V : Sr = 3350 kVA (AF - Air Forced)
Frequency : f = 50 Hz
Primary voltage : U = 35000 V
Secondary voltage : Us = 650 V
No load losses : P0 ≤ 6.6 kW
Impedance losses at rated load (120°C) : Pl(120°C) ≤ 24.5 kW
Impedance voltage 650V, 3350kVA : ek ≥ 8 %
Short circuit current 650V, 3350kVA : Imax,3p ≤ 21 kA
Full load current at 35 kV : I35kV = 55/62 A (Cos=1/0,96)
Enclosure protection : = IP00
Corrosion protection : = C4 according to ISO 9223
Tap changer : ntp = ±2x2.5 %
Highest equipment voltage : Um = 41.5 kV
Power frequency voltage (50 Hz,1 min.) : Ud = TBD
Lightning impulse voltage BIL (1,2/50 µs) : Up = TBD
LV clearance voltage : = 1.1 kV
LV test voltage (50 Hz, 1 min.) : = 3 kV
Connection : = Dyn5 or optional Dyn11 and
YNyn0
Weight : < 8500 kg
Max. ambient temperature : = 50°C
Max. daily average temperature : = 40°C
Max. yearly average temperature : = 30°C
Max. temperature rise (hotspot) : T(Pt100) = 80 K
Cut out of generator (hotspot) : T(Pt100) = 125°C
Cut out of HV-grid (hotspot) : T(Pt100) = 140°C
Temperature class : = F
Environment class : = E2
Climate class : = C2
Fire behaviour class : = F1
Maximum allowable installation height : = 2000 m above sea level
Table 5-3: Transformer data, 33 kV 50 Hz.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
Date: 2010-03-10
Issued by: Technology R&D Class: 2
Type: T09 - Manual Page 12 of 14
Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com
6 The Vestas Earthing System / Lightning Protection
For detailed information of the earthing system and lightning protection system
refer to 1.7 Reference Documents, p. 3.
7 Turbine Marking
8 Short Circuit Protection
Breakers Breaker for Aux. Power
Type:
T4L 250A TMD 4P
Breaker for Converter
Modules Type:
T7M1200L PR332/P LSIG
1000A 3P
Breaking capacity,
Icu
Ics
70 kA @ 690 V
70 kA @ 690 V
50 kA @ 690 V
50 kA @ 690 V
Making capacity, Icm 154 kA @ 690 V 105 kA @ 690 V
L, overload –
time delay
t1
175-250 A
K.
480-1200 A
3-144 sec.
S, short circuit –
time delay
t 2
N/A
N/A
0.72-12 kA
0.1-0.8 sec.
I, short circuit – 1.25-2.5 kA 1.8-18 kA
Vestas Wind Systems A/S
Alsvej 21 DK-8900 Randers
Tlf. +45 97300000 Fax. +45 97300001
Wind turbine type: V90-3.0MW
Controller type: VMP 6000
Voltage: 3x650 V +10/-10%
Frequency: 50 Hz +1/-3 Hz
Current 650V: 2665 A
Max. short circuit current 650V: IK = 42 kA
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
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Breakers Breaker for Aux. Power
Type:
T4L 250A TMD 4P
Breaker for Converter
Modules Type:
T7M1200L PR332/P LSIG
1000A 3P
instantaneous
t 3
K
K
G, earth fault –
time delay
t 4
N/A
0.1-0.8 sec.
240-1200 A
0.1-0.8 sec.
Table 8-1: Detailed information about the short circuit protection.
Document no.: 0006-6958 V00 V112-3.0 MW Electrical Description
Technical Description and Data Manual
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9 Monitoring of the Grid
The grid is constantly monitored by the turbine controller. In case of a grid fault,
the generator and its supporting systems will be disconnected from the grid.
In case the voltage supply for the turbine controller is disconnected, the
emergency stop circuit will be opened immediately disconnecting the generator
and its supporting systems simultaneously.
The generator and its supporting systems will be disconnected from the grid if:
Voltage is above 110 % of nominal voltage for 60 seconds.
Voltage is above 115 % of nominal voltage for 2 seconds.
Voltage is above 120 % of nominal voltage for 0.08 seconds.
Voltage is above 125 % of nominal voltage for 0.005 seconds.
Voltage is below 90 % of nominal voltage for 60 seconds.
Voltage is below 85 % of nominal voltage for 11 seconds.
Frequency is above 53 Hz for 0.2 seconds.
Frequency is below 47 Hz for 0.2 seconds
Recommended