electrical data and settings

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Technical Documentation

ELECTRICAL DATA AND SETTINGS

S88-2.1 MW/60 Hz/Grid Standard

Project: Standard WTG

Document Number: WDQ005

Document Class: 2 [3,4 = Confidential]

Issue: 06 [09/07/2007]

Suzlon Windkraft GmbH noberaner Str. 115 4) +49 38 I 203578-0 18057 Rostock I Germany C) +49 38 I 203578-10

41 [email protected] o www.suzton-wtnd.oe

mailto:[email protected]

ELECTRICAL DATA AND SETTINGS I 588-2.1 MW/60 Hz/Grid Standard

Overview Technical Documentation

The grey marked shows the description which follows on the next pages.

Technical Data Technical Description

ililfu__

Safety

Transportation / Package / Storage

._Installation Commissioning

Operation / Maintenance Troubleshooting Logbook

w.' _

SCADA

"-,,--

AppendiX - Spare Parts - Lists / Charts - Drawings

Electrical Documentation

eled:rltaJ Uat8 and S~ttings

The .nrorrnanon contained In ttus documentation IS the property of Suzfon wounrart GmbH. ThiS documentation and extracts thereof may only be duplicated or forwarded to third parties foilowlrJ9 exphcrt wntten approval by Suzlon Windkraft GmbH. We reserve the right to make changes and Improvements to this documentation as well as the hardware and software features at any time and Without pnor notification All product names used In ttus documentation are trademarks or otherwise protected by law, even If not specrnceav Indicated

© 2007 by Suzlon wmccrart GmbH I R&D Germany I All rJ9hts reserved.

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ELECTRlCAL DATA AND SETTINGS I S88~2.1 MW/60 Hz/Grid Standard

Table of Contents - Electrical Data and Settings

1 Notes on Manuals 4 1.1 Scope.................................................................................................. . 4

1.2 Copynght 4

2 Grid Protection Diagram 5

3 Suzlon 588-2.1 MW 6 3.1 General 6

3.2 Turbine Control . 6

3.3 Low Voltage Ride·Through Capability............... .. 6

3.4 Earthing System .. 6

4 Main Electrical Data 7 4.1 Generator svstern.. 7

4.2 Wind Turbine Main Panel/ SUZLON CONTROL SYSTEM (SCS) 7

4.3 UPS Panel (Uninterruptible power supply) 8

4.4 Electrical Step-up Transformer (not scope of supply) 8

4.5 Grid Data 8

5 Protection Settings 9 5.1 current......................................... . 9

5.2 Voltage................................... . 10

5.3 Asymmetries 11

5.4 Frequency 11

6 Operation Details 12 6.1 Soft Starter 12

6.2 Active power ramp-up settings 12

6.3 Power Factor Cornpensation , 13 6.3.1 Reactive Power Compensation . 13

6.4 Reactive Capability.......... .14

6.5 Operational Parameters . . .14

7 Wind turbine simulation tools 15 7.1 PSS/E modelling data .. 15

7.2 Equivalent diagram of the asynchronous generator 15

7.3 Equivalent synchronous data of the generator 16

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ELECfRlCAL DATA AND SETTINGS I 588-2.1 MW/60 Hz/Grid Stenderd

Notes on Manual5

1 Notes on Manuals This manual lists all necessary electrical data, operation and protection settings of the turbine that are needed by electrical utilities, sub contractors and other partres. The manual is part of the system's Technical Documentation.

The manual contains no safety instructions. General information and rules on health and safety can be found in "Safety Manuals" (WD00060 and WD00061). The "Safety Manuals" give details for safety when working in or around the WTG,

The text contains abbreviations. The abbreviated terms are written in full notation when they are used first time in a chapter. The used abbreviation is written (In brackets) behind the full notation term.

For example: Wind Turbine Generator (WfG).

Pages, tables and figures are numbered consecutively.

The text contains cross references intended to guide the reader to further or more detailed information.

As the Suzlon WTGs are continually improved and further developed, we reserve the right of modifications.

1.1 Scope

This manual is valid for the 588-2.1 MW WTG in following variants:

60 Hz Grid Standard Standard Temperature Version (STV) Low Temperature Version (LTV) SUZLON CONTROL SYSTEM (SCS)

This document is based on information and data specific to our design and sub suppliers. SUZLON Energy reserves the right to alter data, use other manufacturers with other characteristics and revise/improve the design without previous notice. All data herein is subject to tolerances in accordance with lEe.

1.2 Copyright

Reproduction, copying, propagation or any other use by or information of a third party of these manual - whether in parts or as a whole - for competition purposes requires prior written consent by the manufacturer.

All rights reserved.

Adress of the manufacturer:

Suzlon Energy Ltd

5TH Floor Godrej Millenium 9 Koregaon Park Rd.

Pune 411 001 INDIA

[email protected]

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2


Grid Protection Diagram

Grid Protection Diagram

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Suzlon 588-2.1 MW

3 5uzlon 588-2.1 MW

3.1 General

The Suzlon 588-2.1 MW turbine is a variable slip wind turbine with an electrical pitch system. The generator system consists of an asynchronous generator with slip ring and variable rotor resistor due to the SUZLON FLEXISUP SYSTEM (SFS). With 14 step capacitor banks, the turbine is able to compensate the reactive power. The cut-in is performed by a "soft start" module to minimize high inrush currents. Due to the pitch system it is not necessary to motorize the turbine for starting.

3.2 Turbine Control

The turbine operates automatically with the SUZLON CONTROL SYSTEM (SCS). The SCS carries out the following tasks:

Monitoring and supervision of the operation Turbine protection I Grid protection Turbine measurements - wind, temperature etc. Controlling of cut-in via soft starter to rninirruze the inrush current Controlling the blade angle to get optimum slip Optimize the output to nominal value

3.3 Low Voltage Ride-Through Capability

The Suzlon 588-2.1 MW Grid Standard turbine has the performance of stay connected on the grid during temporary grid disturbances. For that purpose the turbine is equipped with advanced turbine control, adding a UPS (battery back-up panel) and new protection settings. The UPS system will supply the turbine internals as turbine controller and components during the "network" disturbance. The Suzlon 588-2.1 MW Gnd Standard is a basic version of LVRT capability which has no extra reactive power support features during the fault period. Upon a fault the SUZLON FLEXISUP SYSTEM (SFS) will use a "crowbar" to short circuit the generator variable rotor system. The generator passes through the fault as a traditional induction generator with improved control strategy.

The Suzlon S88- 2.1 MW Gnd Standard add-ons are:

1. UPS panel (Unlnterruptible power supply panel)

2. Extended main circuit breaker settings

3. New turbine controller settings

4. Fast pitching system

5. Advanced SUZLON FLEXISLIP SYSTEM

3.4 Earthing System

The SUZLON 588-2.1 MW is operated with a TN-C grid system.

The earthing and lightning protection system IS designed according to lEe 61400-24. The general earthing busbar in the tower base is connected to the earthing system which has a required resistance less than 10 Ohm but additionally national requirements have to be taken into consideration. The earthing system is designed project specific to match the site specific soil conditions and to fulfil national standards.


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ELECTRICAL DATAAND SETTINGS I 588-2.1 MW/60 Hz/Gnd Standard

4 Main Electrical Data

4.1 Generator System

Type description Single fed induction generator with sliprings, variable rotor resistance via SFS

Rated power 2,100 kW

Apparent power 2,283 kVA

Voltage stator 600 V (phase to phase)

: Frequency 60 Hz

Number of poles 4

Synchronous speed 1,800 rpm

Speed at rated power and shortcut rotor 1,812 rpm

Operating speed range with SFS 1/800 to 2,100 rpm

Speed range for constant power with SFS

1,836 to 2,100 rpm -.

Reference speed SFS 1,860 rpm

Max. rotor slip 16.7%

Power factor (rated load) 0.92 (uncompensated)

Nominal current 2,190 A

Coupling stator Delta

Coupling rotor Star

Protection class (generator) IPS4

Protection class (slipring-unit) IP23

Thermal classification Class H

SFS rated power 60 kW

SFS peak power 300 kW

4.2 Wind Turbine Main Panel / SUZLON CONTROL SYSTEM (SCS)

Manufacturer Suzlon Energy Ltd

Voltage 3 x 600 V (phase to phase)

Frequency 60 Hz

Main Circuit Breaker Siemens, Type 3WL

I Grid Relay Woodward MFR I Current measurement transformer Class 0.5

Voltage measurement transformer No transformer, direct measurement f-. I Overall accuracy of measurement Class 0.6 r ,

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ELECTRICAL DATA AND SETTINGS I 588-2.1 MW/60 Hz/Grid Standard ~~~

Main Electrical Data

4.3 UPS Panel (Uninterruptible power supply)

Manufacturer Suzlon Energy Ltd ~l Capacity of battery system ;::-: 3 minutes

4.4 Electrical Step-up Transformer (not scope of supply)

Transformer connection oelta-wve n5

Nominal apparent power 2,500 kVA

Nominal winding ratio xx kV/ 0.6 kV

Tapping ±S%

Reactance 6%

No load losses about 2,500 W

Full load losses about 26,500 W

4.5 Grid Data

!Short circuit power ratio ~o I

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ELECTRICAL DATA AND SETTINGS 1 588-2.1 MW/60 Ha/Gnd Standard

Protection Settings

5 Protection Settings These settings are calculated values. They are subject to changes after more field experience with Grid Standard version of 588-2.1 MW. The document will be revised then on short notice.

5.1 Current

Short circuit breaking capacity 100 kA

Thermal current setting (IR) 0.9 x IN = 2,250 Amp

5.5 s

4 x IN = 10,000 Amp

~0.2 s

300 Amp

0.3 s

Thermal time setting (tRl

Short circuit current setting (ISD)

Short circuit time setting (tSD)

Earth-fault tripping (IG)

Earth-fault tripping (tc)

Main Circuit Breaker

1000.00 r---~~~~~-----_,__------------~~~o_,

-_.

c:;- 10,00

•.!!!.•E j::

1,00 ---=--==-::

.~ -----~- '----

._---- IOJO

I I, I

lOCO 10CCC 10COOO

Current [Amp]

-Thermal & Shan CirculI ProtectIOn -Earth Faull Prolec:hon

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ELECTRICAL DATA AND SETTINGS I 588-2.1 MW/60 Hz/Gnd Standard

Protection Settings

5.2 Voltage

Turbine controller settings:

Under voltage (low) UN < 90%, trip delay 60 seconds

Under voltage (low-low) UN < 85%, trip delay 3 seconds

iOver voltage (high) UN> 110%, trip delay 60 seconds

UN> 115%, trip delay 0.2 secondsOver voltage (high-high)

The 5uzlon 588-2.1 MW Grid Standard protection settings according to diagram below.

Voltage [%]

~bine Tripping

'10% -t------' L 100% Normal

operation

Normal operation

80%

Continuous Operation

40% Turbine Tripping

15% --------------

0%

~ ~ (f) (f)

ON o

o w

(f)

"'o

o w UJ o

o w UJ

i;l (f)

o N

c w (f)

"'N

o w UJ 0 co

I I iii

" w UJ 0 co

. Time [sec.]

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ELECTRICAL DATA AND SETTING5 I 588-2.1 MW/60 HZ/Grid Standard

Protection Settings

5.3 Asymmetries


I Maximum asymmetric current I ASYM > 5%, trip delay 0.1 seconds

Maximum asymmetric voltage VASYM > 2%, trip delay 60 seconds (V ASYM = phase to ground)

Phase Shift Monitoring 3 Phase

Phase Shift (3-phase) 6°

5.4 Frequency

From its design the turbine can withstand the following frequency range:

Under frequency (low) fN -6%, trip delay 0.2 seconds

Over frequency (high) fN +5%, trip delay 0.2 seconds

The setpoint can be adjusted within the limits. It has to be stated very clearly here that the settings of the individual turbine will be with the parameters locally required.

588 Turbine Frequency rangePower Output

[%]

100%

90%

80%

70%

60%

50%

40%

30%

:W"io

10%

Dc", _ .

Turbine Trip

Turbine Continuous

Output

.

I I Frequency

56.4 Hz fN = 60 HZ 63 Hz [Hz](f N - 6%) (f~ + 5%)

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ELECTRICAL DATA AND SETTINGS I 588-2.1 MWj60 Hz/Grid Standard

Operation Details

6 Operation Details

6.1 Soft Starter

To minimise the inrush current during cut-in of the generator a soft starter is used. This is a combination of thyristor switches and a small controller, linked to the turbine control system.

When the generator speed has reached synchronous speed the thyristors connect the generator to the grid by phase control to limit the current. A predefined ramp increases the current up to nominal current. Phase and frequency of the generator stator are now the same as the grid, the thyristors get bypassed and the turbine starts producing.

The following values have been measured on the 50 Hz prototype. It is estimated to have almost the same current at the 60 Hz turbine but this has to be verified via soon starting measurement. It depends on the wind speed when we will get the results of the measurement.

Peak inrush current:

0.27 x rated current ~Cut-in at cut-in wind speed------'----~---+--~---

Cut-in at rated wind speed 1.13 x rated current

6.2 Active power ramp-up settings


~efaUlt ramp-up function 0nsabled (enable or disable)

Ramp-up setting range 5 to 100% per minute

Turbine Ramp Up function Turbm.. k"','

O~tpu~

:"':

RaUd Wond Speed,,,

,I '" W,nd Farm Leveiao-,

,I = 1 Wmd Turbine ,,60"'" ,,,r ,I ,40% ,

.'.~ ,

,,,

2~'··~ " ,," I Cut-In" : Wind Sp"'O!d0'-,

'-rtTTTTTTTTTTTTTTnTm-rrr-rrrcrr-i.mt---,E -----v-------~ !~,~eutes: Varii'lble gamp up rate [ramp up ,,/'" per minute]

u


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Operation Details

6.3 Power Factor Compensation

Switched capacitor banks

Voltage

Type

Power factor setting range at nominal power

General possible range for power factor regulation

~ower factor setting

3 x 600 V

14 x 68.1 kvar

Control range 0.921.2gglng to 0.9995 Leading

See next chapter: Reactive Power Capability

Default value = 1

Adjustable via softwareI Power factor reference value

Lagging is equal to absorbing reactive power, or the reactive power is inductive in the lagging area. Leading is equal to producing reactive power, or the reactive power is capacitive in the leading area.

6.3.1 Reactive Power Compensation

The reactive power compensation system maintains as default unity power factor after turbine cut in using a 14 step capacitor bank.

- The Suzlon controller continuously measures the actual reactive compensation needed. The turbine controller maintains the specified power factor by switchinq on or off a number of capacitor steps adjusting the required reactive power.

- To avoid frequent switchinq on and off of the capacitor bank, a delay has been defined both for sWitching on and off, to enhance the life and performance of the capacitors.

turbine coeraron

-, ,

dlrE.'C!lyS\I<l1tCh-Ofi Dr necessary compensanon steps to reacn

pn....er (actor aetoomt compensation step 1 compensation srea 2 coeoensauon step 3

swncrvon of a corroenseucn step m~a~u,@d power

rector altrer@nl leading p r

swtct-orr 01 a connensanon step

Sll'ltch delay = 20 sec (rom$9t pOint swrtch delay" ::lD se~ ,

-,

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ELECTRICAL DATA AND SETTINGS I 588-2.1 MW/60 Hz/G-id Standard

Operation Details

6.4 Reactive Capability

With SC-Pawer Plant, the park control tool, it is possible to control the power factor according to the values temporarily needed. This IS possible in the range shown in the graph below as a hatched area.

S88 PQ Chart - Reactive Power Capability, 60 Hz

-1000

0 500 1000 1500 2000 2500

Power output [kW]

The shown range is with standard capacitor equipment of the turbine. If more capacitive reactive power is required it is possible to achieve it by extending the turbine compensation.

6.5 Operational Parameters

600

400

-c . 200,m

i>

"'" 0 ~ u

~ :<:0 -200c, m . .~

~ -400U m m " 0: - -600

-800 PF=092

IStart wind 4 m/5

Stop wind 2S m/5

[Re-start wind speed after over wind 23 m/s

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7 Wind turbine simulation tools

7.1 PSSjE modelling data

Suzlon Energy has developed a PSS/E model of the S88-2.1 MW including all turbine data and settings.

The PSS/E mode! may be used to evaluate the network system stability or load flow cases as required from the network operators or system planners. The PSS/E model can also be used to find the optimal solution for a wind farm and hereto substation design.

The PSS/E model is available upon request and will be forwarded upon signing a confidentiality agreement.

7.2 Equivalent diagram of the asynchronous generator

The diagram is the equivalent circuit of the asynchronous generator with resistance and reactance values of phases (star connected).

Rl Xl X'2 R'2

Rfe Xh

r I S88-2.1 MW Generator

I Stator resistance

~tator leakage reactance

I Magnetizing reactance

I Iron loss resistance I

X'2 [0] I 0.0564LRotor leakage reactanc_e I--_~ _+_----------

I~Rotor resistance _.l.I_R_'2 [0] ~0_.0_0_34 _


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ELECTRICAL DATA AND SETTINGS I 588-2.1 MW/6D HZ/Grid Standard

7.3 Equivalent synchronous data of the generator

Please note, that the synchronous data are calculated on basis of the characteristics of the asynchronous induction generator by the manufacturer. These data should only be used in case of non availability of a model of an asynchronous machine.

I 5uzlon 588-2.1 MW -synchronous data

Equivalent 14 pole

Rated voltage (ph-ph) U 600 V

Rated generator power factor PF 0.92 (uncompensated)

Short circuit ratio (without SCS soft start) 1ST / IN 5.26

~Rated kVA base K-Base 2,283 kVA

Base impedance Z-Base 0.158 Ohm

Stator resistance R1 0.0027 Ohm 0.017 p.u.

Stator leakage reactance Xl 0.0536 Ohm 0.340 p.u.

Synchronous reactance Xd 2.5636 Ohm 5.402 p,u.

Short-circuit timecon. TdO N/A N/A

Transient reactance Xd' 0.0941 Ohm 0.198 p.u.

Short-circuit transient timecon. Td' 0.0206 sec. N/A

Open circuit transient timecon. TdO' N/A N/A

Subtransient reactance Xd" 0.0523 Ohm 0.110 p.u.

Short Circuit subtransient time constant Td" N/A N/A

Open circuit subtransrcnt timecon. e---

TdO" N/A N/A

Inertia constant (Incl. turbine) H 4.7 sec. N/A

Saturation curvepoints (noload) 5 (1,0) N/A N/A

Saturation curvepoints (noload) 5 (1,1) N/A N/A3 'I Saturation curvepolnts (noload) 5 (1,2) N/A I N/A

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electrical data and settings

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