Wind to Power System VOLTAGE SAG COMPENSATION FOR PROVIDING WIND TURBINE LOW VOLTAGE RIDE THROUGH CAPABILITY

Transcription

1 Wind to Power System VOLTAGE SAG COMPENSATION FOR PROVIDING WIND TURBINE LOW VOLTAGE RIDE THROUGH CAPABILITY

2 INDEX W2PS Organization Chart History Business Model Current Clients Compensation Systems Global Scenario Spanish Requiremensts Coverdip System Description Main Features Experimental Results Comparison with solutions at substation level

3 W2PS W2PS Organization Chart History Business Model Current Clients Compensation Systems Global Scenario Spanish Requiremensts Coverdip System Description Main Features Experimental Results Comparison with solutions at substation level

4 W2PS WINDTOPOWERSYSTEM(W2PS)isacutting-edgecompanyinthefieldofrenewableenergytechnology W2PSprovidesinnovativepowerelectronicsbasedsolutionsfortheintegrationofrenewableenergyinthegrid. W2PSwascreatedin2006asthemergingofanuniversityspin-offandElementPower. University Spin-off 4

5 CURRENT ORGANIZATION CHART CHIEF EXECUTIVE OFFICER José Manuel Corcelles STAFF CHIEF TECHNICAL OFFICER DSM CHIEF SCIENTIFIC OFFICER SAG BUSINESS DEVELOPMENT DIRECTOR JLRA 5

6 HISTORY W2PS is founded as the merging of an university spin-off and Element Power 2007 W2PS develops STATCOM (Static Synchronous Compensator) W2PS develops COVERDIP (Voltage Dips Compensator) 2007 RD 661/07 makes P.O requirements mandatory COVERDIP complyment accredited by the independent testing laboratory LCOE 2008 COVERDIP allows Careón wind farm to obtain P.O response requirements certificate 6

7 BUSINESS MODEL W2PS provides global solutions to power producers from design to operation and maintenance Research & Intellectual Rights Protection Product Development Manufacturing Installation Commissioning O&M Stock Main Suppliers: 7

8 CLIENTS In2008W2PSinstalledmorethan250equipmentsindifferentwindfarmsandmorethan650unitshavealreadybeensignedfor Main clients: EUFER: Enel Unión Fenosa Renovables. RWE: for its spanish subsidary AERSA. ACS/COBRA: for its subsidary EYRA. EDP Renováveis : for its subsidary NEO Energía. FALCK RENEWABLES GRUPO ADELANTA: for its subsidary Montouto

9 COMPENSATION SYSTEMS W2PS Organization Chart History Business Model Current Clients Compensation Systems Global Scenario Spanish Requiremensts Coverdip System Description Main Features Experimental Results Comparison with solutions at substation level

10 GLOBAL SCENARIO FOR COMPENSATION SYSTEMS Voltagedips(orsags)areabruptvoltagedropsfrom10%to99%during1msto1minuteduetogridfaultsorlargemotorstarting. Voltagedipscanprovokethedisconnectionofwindturbinesduetoshort-circuitcurrentsortorotoracceleration. Thelostofahighamountofwindpowerinanelectricalsystemcanseriouslyaffectthestabilityandsecurityoftheelectricalsystem. Withincreasingwindpowerpenetrationinpowersystems, SO saredemandingnewrequirementstowindfarms. FromtheLVRTcapability,thenewrequirementsareextendingtovoltageandfrequencycontrol,inertiaemulation,powersystemstabilization,etc. AS LONG AS RENEWABLE ENERGY SHARE INCREASES GRID CODES WILL DEMAND SIMILAR CONTROL ABILITY TO THOSE OF CONVENTIONAL POWER PLANTS FOR GRID OPERATION AND CONTROL COMPENSATION SYSTEMS NOT ONLY GARUANTEE GRID STABILITY BUT ALSO ELIMINATE THE TECHNICAL RESTRICTIONS FOR INSTALLING NEW RENEWABLE ENERGY FACILITIES 10

11 SPANISH LVRT CAPABILITY REQUERIMENTS P.O.12.3establishestherequirementsofthewindturbineresponsetovoltagedips. RD661/2007makesmandatorythefulfillmentofP.O.12.3toallwindturbines,neworexisting. Wind turbine manufacturers are providing solutions for the LVRT capability in new wind turbine, but in many cases existing wind turbines are not retrofitted by the WT manufacturer. W2PS provides a solution for the LVRT capability that is independent of the WT technology and therefore suitable for any wind turbine model in the market. P.O Requirements 11

12 COVERDIP W2PS Organization Chart History Business Model Current Clients Compensation Systems Global Scenario Spanish Requiremensts Coverdip System Description Main Features Experimental Results Comparison with solutions at substation level

13 W2PS VOLTAGE SAG COMPENSATOR: COVERDIP Wind to Power System (W2PS) has developed an innovative voltage sag compensation system, named Coverdip, that allows to inmunize sensible loads to such electric disturbances. BeyondthestateoftheartofDynamicVoltageRestorers(DVR), Coverdip uses an innovative converter topology that allows series connection in the feeder without employing an insertion transformer. The main field of application is to provide wind turbine low voltage ride through capability as specified in the Operational Procedure 12.3 of the Spanish SO, REE. Althoght, it can be also employed in any other industrial sector. 13

14 MAIN FEATURES (I) Series connection without transformer Voltage sag compensation at the generator terminals Provides wind turbine LVRT capability as required in P.O Application to existing wind turbine without LVRT capability. Dynamic control of reactive power Reactive control during the voltage sag to meet the requirements of P.O Provides the wind turbine with the reactive capacity required to reach maximum reactive bonus established in the RD 661/

15 MAIN FEATURES (II) Controloftheelectricgenerator Dynamiccontrolofreactivepowerandvoltageatthegenerator. Softstartingthroughcontinuousincreasingofvoltageatthegenerator. Lossesoptimizationbymeansofoperationatreducedvoltageatlowload. Generator flux damping following an electric disturbance (power and torque oscillation damping) TECHNICAL FEATURES Ratedvoltage: Ratedpower: Ratedcurrent: 690V 600/750/900kW 1350/1500/1650kW 500/625/750A 1125/1250/1375A 15

16 MAIN FEATURES (III): SIZE AND WEIGHT Filter Converter Operation andcontrol Resistences Aprox. weight 300 Kg RatedPower 750 kw 16

17 SYSTEM DESCRIPTION: WIND TURBINE INTEGRATION Coverdip installation inside a wind turbine BT 690 V BT 690 V MT 20 kv o 30 kv MT 20 kv o 30 kv AT 66 kv o 132 kv GENERADOR TRANSFORMADOR BT/MT LÍNEA SUBTERRÁNEA INTERIOR DEL PARQUE EÓLICO LÍNEA DE EVACUACIÓN DEL PARQUE EÓLICO COVERDIP AEROGENERADOR CENTRO DE TRANSFORMACIÓN DEL PARQUE EÓLICO Coverdip is a solution at the wind turbine level 17

18 SYSTEM DESCRIPTION BT 690 V BT 690 V MT 20 kv o 30 kv MT 20 kv o 30 kv AT 66 kv o 132 kv GENERADOR COVERDIP TRANSFORMADOR BT/MT LÍNEAS SUBTERRÁNEAS INTERIORES DEL PARQUE EÓLICO LÍNEA DE EVACUACIÓN DEL PARQUE EÓLICO AEROGENERADOR CENTRO DE TRANSFORMACIÓN DEL PARQUE EÓLICO BT 690 V BT 690 V GENERADOR COVERDIP TRANSFORMADOR BT/MT Wind Farm AEROGENERADOR BT 690 V BT 690 V GENERADOR COVERDIP TRANSFORMADOR BT/MT AEROGENERADOR 18

19 EXPERIMENTAL RESULTS I Three phase fault Voltage at the Transformer Terminals tensiones (V) Voltage at the Generator Terminals tensiones (V) Feeder Current corrientes (A) tiempo (s) 19

20 EXPERIMENTAL RESULTS II Phase to Phase Fault Voltage at the Transformer Terminals tensiones (V) Voltage at the Generator Terminals Feeder current tensiones (V) corrientes (A) tiempo (s) 20

21 TECHNICAL COMPARISON OF SOLUTIONS I Wind Farm Wind Turbine Solution Equipment Voltage Sag Reactive Losses Dynamic control Rated Power Installation Paralell STATCOM* Series DVR** Paralell STATCOM Series DVR (*) STATCOM: Static Synchronous Compensator (**) DVR: Dynamic Voltage Restorer (Standard with insertion transformer) Seriessolutionsaremoresuitableforvoltagesagcompensation Paralellsolutionsaremoresuitableforreactivecompensation. Solutionsatwindfarmlevel: Aremoredifficulttoinstallastheyrequireadministrativepermit RequirehigherIPfrommeteorologicalandenvironmentalfenoma,likerain,dust,etc. Solutionsatwindturbinelevel: AreeasiertoinstallastheyarearrangedinsidetheWTtower RequirelowerIPthanoutdoorarrange 21

22 TECHNICAL COMPARISON OF SOLUTIONS II COVERDIPis a a series solution for voltage sag compensation at the wind turbine level without transformer: reduced operation losses as it does not use a transformer allows the dynamic control of the generator because of its direct connection to generator terminals arranged inside the wind turbine tower because it does not use a transformer (less weight and volume) 22

23 CONCLUSIONS COVERDIP allows to meet the LVRT capability requirements established in the P.O It has dynamic reactive power capability, so it can also be employed to reach the maximum reactive bonus established in the R.D. 661/2007. Reduce costper MW compensated. 23