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Windy Boy Grid Tied Inverter Operators Manual Addendum for the

1. Boy will output 500 Watts AC to the utility If the DC voltage reaches 400 Volts the Windy Boy will output 1000 Watts AC If the voltage continues to increase the Windy Boy will continue to output 1000 Watts AC as specified by the lt Pmax gt parameter setting If the wind slows down such that the DC voltage falls below 300 Volts the inverter will continue to operate at zero power output for 120 seconds If the DC voltage increases above 300 Volts the stop timer will reset and the Windy Boy will process power according to the power curve If the DC voltage remains below 300 Volts for 120 seconds the Windy Boy will stop processing power and shut down Power Ramp Function If the inverter is starting up from zero power and the DC input voltage is mid range on the power curve the inverter will ramp to the appropriate power point on the curve at a 500W second rate This insures that the turbine does not experience radical power steps SMA America Incorporated Version 1 4 Copyright 2004 2005 Page 7 of 10 Windy Boy Grid Tied Inverter Operators Manual Addendum for the Sunny Boy 1800U 2500U 6000U M causing mechanical stress during gusting wind conditions This ramp rate is adjustable with the lt P Wind Ramp gt parameter Typical Installation Diagrams The following drawings are not specific for any wind turbine or installation They are provided as basic reference material showing necessary major components and installation sequence
2. Please contact the specific wind turbine manufacturer for exact installation drawings specific for your wind turbine WINDY BOY 1800U NEUTRAL fy WAN 1A Fuse not installed on DC INTERFACE V8 95 firmware or OVERCURRENT greater Unternald amp OVERVOLTAGE PROTECTION AC MAIN PANEL Windy Boy 1800U SMA America Incorporated Version 1 4 Copyright 2004 2005 Page 8 of 10 Windy Boy Grid Tied Inverter Operators Manual Addendum for the Sunny Boy 1800U 2500U 6000U M Windy Boy 2900U 6000U NEUTRAL i Le 1A Fuse not installed on DC INTERFACE v8 95 firmware OVERCURRENT amp or greater nternoabd PREETI AC MAIN PANEL Windy Boy 2500U Ground Fault Protection Earlier version of the Windy Boy incorporated the GFDI fuse protection system found in all Sunny Boy PV inverters This protection is only required by the NEC for PV systems Windy Boy firmware 8 95 and greater disables the GFDI fault circuitry and also requires removal of the 1A GFDI fuse for proper operation Installation of this fuse may interfere with the over voltage protection supplied by the wind turbine manufacturer DC Disconnect Switch A means of disconnect between the wind turbine and the Windy Boy inverter is required by the NEC It must be load break rated for the maximum DC voltage of the system 400Vdc for the WB1800U and 600Vdc for the WB2500U and WB6000U The NEC requires the DC input be grounded This is done on the
3. Frequency 60Hz AC Operating Frequency Range 59 3 60 5Hz Maximum AC Output Power 2500Wac 240Vac 2100Wac 208Vac Maximum AC Output Overcurrent 15A Protection Power Factor Fixed Unity SMA America Incorporated Copyright 2004 2005 Page 5 of 10 M Windy Boy Grid Tied Inverter Operators Manual Addendum for the Sunny Boy 1800U 2500U 6000U WB6000U WB6000U Specifications Maximum DC Input Voltage 600Vdc DC Operating Range 250 550Vdc line voltage dependent see SB6000U Operators Manual VdcWindStart Programmable Range 250 550Vdc VdcWindMax Programmable Range 250 550Vdc Vpv Start 250 550Vdc Maximum DC Operating Current 25Adc Maximum DC Short Circuit Current 25Adc Maximum AC Current 25Aac Nominal AC Output Voltage 208 240 277Vac configurable AC Operating Voltage Range 183 229Vac 208V Nominal 211 264Vac 240V Nominal 244 305Vac 277V Nominal Nominal AC Frequency 60Hz AC Operating Frequency Range 59 3 60 5Hz Maximum AC Output Power 6000Wac 240 or 277Vac 5100Wac 208Vac AC Output Overcurrent Protection 40A Power Factor Fixed Unity Power Curve Function The Windy Boy controls power to the grid based upon the input DC voltage from the wind turbine This is based upon a linear curve with a start voltage and a maximum operating voltage These parameters may be adjusted and optimized for the specific turbine c
4. and inherent losses associated with moving power through a battery resulted in very inefficient delivery of wind power to the utility Overall transfer conversion losses were easily in the 40 50 range This means that 50 of the energy available from the wind turbine was being delivered to the utility The Windy Boy inverter is a single conversion DC to AC inverter which is similar in operation to the Sunny Boy grid tied PV inverter Mechanical power from the turbine is delivered to the inverter as DC voltage speed and current torque Most small turbines use an AC alternator and a diode rectifier bridge to convert variable frequency AC from the alternator to DC power The inverter uses a programmed power versus voltage curve to command current from the turbine dependent upon the DC voltage generated by the turbine Each alternator design has an optimum operating point or power curve of speed voltage versus torque current The Windy Boy incorporates a linear power curve that may be programmed by the user to match the characteristics of the specific wind turbine alternator Product Limitations and Warnings The Windy Boy inverter is a standard inverter designed to be installed only with qualified wind turbines Input protection is the responsibility of the turbine manufacturer or system integrator installer Misapplication of the Windy Boy may cause irreparable damage to the inverter and turbine system and will void all product warranties Pl
5. negative DC input within the inverter through a 1 Amp fused GFDI detection circuit Because of this the negative input may not be switched at the DC disconnect or anywhere else in the input circuit DC Input Fuse Requirement A 15 Amp overcurrent device is required in the DC input circuit for both the WB1800U and the WB2500U A 40A overcurrent device is required in the DC input circuit for the WB6000U This could be either a circuit breaker or fuse rated for DC current and the appropriate maximum DC voltage of the system 400Vdc for the WB1800U and 600Vdc for the WB2500U and WB6000U Surge Protection There are no surge protection devices within the Windy Boy inverter SMA recommends placing appropriate surge protection devices as close to the AC and DC sources as possible We recommend placing the AC surge protector within the AC main panel The DC surge protector should be installed at the turbine in the DC interface enclosure shown in the previous diagrams SMA America Incorporated Version 1 4 Copyright 2004 2005 Page 9 of 10 pe Windy Boy Grid Tied Inverter Operators Manual Addendum AWA m for the Sunny Boy 1800U 2500U 6000U Appendix Contact Information SMA America 12438 C Loma Rica Drive Grass Valley CA 95945 530 273 4895 www sma america com SMA America Incorporated Version 1 4 Copyright 2004 2005 Page 10 of 10
6. to peak Maximum AC Current Protection 15Aac 240Vac WB6000U Maximum Input Voltage 600Vdc Maximum DC Fuse Requirement 30Adc 600Vdc Maximum DC Power 6700Wdc Maximum DC Ripple 5 peak to peak Maximum AC Current Protection 40Aac 208 240 277Vac It is the responsibility of the turbine manufacturer and system installer to insure adequate system protection is provided for the Windy Boy inverter DC Over voltage Protection The largest danger to the inverter is from DC over voltage This is the common result of a wind turbine over speed condition The most radical over voltage condition occurs when the inverter is processing power from the turbine and an event most commonly a utility line fault occurs causing the inverter to immediately stop processing power When this happens the power that was going to the utility is transferred back into the turbine as speed The wind turbine will quickly increase speed which causes the DC voltage to also increase rapidly This can produce voltage in excess of 2000Vdc if the turbine was fully loaded at the time of an event Exceeding the maximum input voltage will void the inverter warranty Most turbine manufacturers have designed a protection circuit to protect power processing equipment from this condition Operating Specifications WB1800U WB1800U Specifications Maximum DC Input Voltage 400Vdc DC Operating Range 155 400Vdc line voltage dependent see SB1
7. 800U Technical Description VdcWindStart Programmable Range 155 375Vdc VdcWindMax Programmable Range 155 375Vdc Vpv Start 155 375Vdc Maximum DC Operating Current 12Adc Maximum DC Short Circuit Current 18Adc Nominal AC Output Voltage 120Vac AC Operating Voltage Range 106 132Vac SMA America Incorporated Version 1 4 Copyright 2004 2005 Page 4 of 10 M Windy Boy Grid Tied Inverter Operators Manual Addendum for the Sunny Boy 1800U 2500U 6000U WB1800U Specifications Nominal AC Frequency 60Hz AC Operating Frequency Range 59 3 60 5Hz Maximum AC Output Current 17Aac Maximum AC Output Power 1800Wac Maximum AC Output Overcurrent 20A Protection Power Factor Fixed Unity WB2500U WB2500U Specifications Maximum DC Input Voltage 600Vdc DC Operating Range 220 550Vdc 208Vac configuration 250 550Vdc 240Vac configuration line voltage dependent see SB2500U Technical Description VdcWindStart Programmable Range 250 550Vdc 208Vac configuration 220 550Vdc 240Vac configuration VdcWindMax Programmable Range 250 550Vdc 208Vac configuration 220 550Vdc 240Vac configuration Vpv Start 155 375Vdc Maximum DC Operating Current 13Adc Maximum DC Short Circuit Current 18Adc Maximum AC Current 15Aac Nominal AC Output Voltage 240Vac AC Operating Voltage Range 183 229Vac 208V Nominal 211 264Vac 240Vac nominal Nominal AC
8. AMT Windy Boy Grid Tied Inverter Operators Manual Addendum for the Sunny Boy 1800U 2500U 6000 Revision 1 4 Revision History 1 0 October 20 2003 Kent Sheldon Initial Release 1 1 October 22 2003 Kent Sheldon 15A DC Fuse Requirement 1 2 December 11 2003 Kent Sheldon DC Ripple Requirement 1 3 April 14 2004 Kent Sheldon GFDI Fuse Removal 1 4 March 22 2005 Kent Sheldon WB6000U SMA America 12438 C Loma Rica Drive Grass Valley CA 95945 530 273 4895 pe Z Windy Boy Grid Tied Inverter Operators Manual Addendum AWA m for the Sunny Boy 1800U 2500U 6000U Table of Contents Table f Contents scssi cat cen sai ete dad e eE TE EE ESE EEE E ETa EEE a Erit 2 OVEIVIEW csse personas ea or ee i arae eE e eee ee eames 3 ILI cs E E E E T S 3 Product Limitations and Warnings sisces cu sanseconsnedeansanunsvaibgnnnannnnelodeataeanwandgenmsxaasanteanascanadadadsngs 3 Inverter Selection and Specification essssesssseeseesstesssessrtesrrerstrrerrerreeresessstenreresreesseesssese 3 System Protection Requirements essien eae E EEEE AIEEE E ES 3 WBISOOU ss seshecrscscactueesa saiuseatanawe ues neieetawhsturaasiukanecoid eatacsukl E E EO EEE TAERE EE SEE 3 WB2500U sinonimon a a e a re a aa 4 WBOOOOU sicronnenanee na ra E R E En EErEE RO 4 DC Over volfage PU OO aces ctosase satin tesctednnastiva oea RE EE E EEEE 4 Operating Specifications reinste sr r E A E 4 WBIS0OU ess soiree os se edaubeiee
9. a aniotennesbcycenanteatvadaceeeeceban E o a aE Ea a EE E EREE REEERE 4 A eiO 0 OE E ass sa au san sais eae psc E E E E E E 5 WV POLIO satan aaastaea rirerire eii ianea ranea aE EN Ee OR TEE EEEE EEEE OESS 6 Power Curye FUNGON srsssisssereniesospissereranoireo reiso see vas Eeee EEEa EES AEE E ETENEE EE 6 Op ratins Scena sison e rE EE A RE ii 7 P wer Ramp Pe MOT yu iceccus ences poer ieee ree EEE a E a E A a EEE 7 Typical Installation Diagrams eesseeesseeeeeessesssersrressrersrrrssrersseersreesstesrrersreesseessseesrreesreeree 8 Ground Fault Prot tON ce ctsacaneseucantacdecciandiseanaandeasscasanceausdseaesuaianasennaaaciansssaeaennissianateeaeds 9 DC Disconnect SWIER e eee a AERE ERE EEE EEE 9 DC Input Fuse Regi Smet sc cinsscusieissccrnisiecedqanidveeaasvangeaes radians taemandagtaagiasecens R 9 VIS Protection esise eres rn tac nc ag tau aieeaa ase EE EPE EREE CES EER 9 PPE TO 1D Oe E E A E eaisdemnwbuvemnat abamiaoaseccenetdaanane 10 C ft ct Ta PHANG IN ssc acacticaacsseedasadeetansnansarsamnosonasua pas sedans arad aeaa Enei aa ans aasia 10 Notice The Windy Boy inverter must be used within the limits shown on the rating label This document is an addendum to be used in conjunction with the Sunny Boy 1800 2500 or 6000 SB1800U SB2500U or SB6000U installation and operations manuals Caution The Windy Boy inverter is designed to operate with wind turbines employing a 3 phase generator and rectifier that produce
10. current and voltage within the allowable operating ranges of the inverter All protective wind turbine input functions over current over voltage over power fault tolerance and recovery turbine mechanical protection etc are the responsibility of the turbine manufacturer or system integrator installer The Windy Boy inverter is a standard inverter designed to be installed only with qualified wind turbines Input protection is the responsibility of the turbine manufacturer or system integrator installer Misapplication of the Windy Boy may cause irreparable damage to the inverter and turbine system and will void all product warranties Please contact your turbine manufacturer for detailed system information SMA America Incorporated Version 1 4 Copyright 2004 2005 Page 2 of 10 Windy Boy Grid Tied Inverter Operators Manual Addendum for the Sunny Boy 1800U 2500U 6000U M Overview The Windy Boy is the first SMA inverter designed for direct connection of a wind turbine generator to the utility grid The Windy Boy is the same physical inverter as the Sunny Boy operating in a special Turbine software mode This document details this operating mode and the requirements for connecting a wind turbine to the Windy Boy inverter Background Historically grid tied wind turbines have charged batteries through a charge controller and used another converter to process power from the battery to the utility grid The dual conversion
11. ease contact your turbine manufacturer for detailed system information The Windy Boy inverter is designed to operate with wind turbines employing a 3 phase generator and rectifier that produce current and voltage within the allowable operating ranges of the inverter All protective wind turbine input functions over current over voltage over power fault tolerance and recovery turbine mechanical protection etc are the responsibility of the turbine manufacturer or system integrator installer Inverter Selection and Specification Currently the wind turbine software mode is available with the WB1800U 1800 Watt peak the WB2500U 2500 Watt peak and the WB6000U 6000 Watt peak Windy Boy inverters must be specially ordered from your wind turbine dealer Contact your wind turbine dealer to determine which inverter is optimized for use with their turbines System Protection Requirements WB1800U Maximum Input Voltage 400Vdc Maximum DC Fuse Requirement 15Adc 600Vdc Maximum DC Power 2000Wdc Maximum DC Ripple 5 peak to peak Maximum AC Current Protection 20Aac 120Vac SMA America Incorporated Version 1 4 Copyright 2004 2005 Page 3 of 10 Windy Boy Grid Tied Inverter Operators Manual Addendum for the Sunny Boy 1800U 2500U 6000U M WB2500U Maximum Input Voltage 600Vdc Maximum DC Fuse Requirement 15Adc 600Vdc Maximum DC Power 2800Wdc Maximum DC Ripple 5 peak
12. onnected to the Windy Boy When the DC input voltage reaches the start voltage setting the inverter will begin a countdown to start delivering power to the grid This length of time is dependent upon the start timer setting If the DC input voltage remains above the start voltage setting for the prescribed length of time the inverter will synchronize with the grid and begin delivering power As the DC input voltage rises the power delivered to the grid will increase as shown in the chart below SMA America Incorporated Version 1 4 Copyright 2004 2005 Page 6 of 10 Windy Boy Grid Tied Inverter Operators Manual Addendum for the Sunny Boy 1800U 2500U 6000U M Windy Boy Power Curve 120 100 Vdc WindMax 80 60 Pmax 40 20 Vdc WindStart 0 4 0 300 400 600 Input Voltage Vdc The operating parameter settings within the Windy Boy are pre programmed by the wind turbine manufacturer or SMA America Operating Scenario Consider the following scenario Parameter Setting Value Units T Start 10 Seconds T Stop 120 Seconds Vdc Start 300 Vdc Vdc Max 400 Vdc Pmax 1000 Watts When the DC input voltage from the wind turbine reaches 300 Volts the inverter will wait 10 seconds If the voltage remains above 300Vdc the Windy Boy will synchronize with the utility and begin exporting power When the DC voltage reaches 350Vdc the Windy

Windy Boy Grid Tied Inverter Operators Manual Addendum for the

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