Recent  Progress  in  Solar  Energy  Grid  Integra5on  Systems  

-­‐  An  update  on  DOE  SunShot    SEGIS-­‐AC  Program  

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Panelists  2  

Tom  Key   EPRI  

Michael  Mills-­‐Price   Advanced  Energy  

Leon  Roose  (Marc  M.  Matsuura)   University  of  Hawaii  /  HNEI  

Patrick  Chapman   SolarBridge  

Maja  Harfman-­‐Toronovic  (Mohammed  Agamy)    

GE  Global  Research  

Ulrich  Schwabe   Alencon  Systems  

DOE  SunShot  Vision  and  Goals  

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Deployment / grid integration •  Solar energy could meet roughly

14% of U.S. electricity energy demand by 2030, 27% by 2050, including PV and CSP

•  Today, solar generation <1%

Cost reduction “reduce the total installed cost of solar energy systems to $.06 per kilowatt-hour (kWh) by 2020. Today, SunShot is 60% of its way toward achieving the cost target.

SunShot Vision Study

Benchmark  2010*  

2013*   2020  Target  

U5lity  Scale  PV  Installed  Cost  

$4.0/W   $2.27/W   $1.0/W  

LCOE   $0.21/kWh   $0.11/kWh   $0.06/kWh  

* Source: DOE SunShot / NREL

Wind  and  Solar  in  Germany  4  

Installed (2012): 33GW solar, 30GW wind Production in first half of 2012: 14.3 TWh solar, 24.8 TWh wind Total electricity production: 280 TWh

Solar + Wind

Peak wind + solar ~ 29%

Source:  Prof.  Dr.  Bruno  Burger,  Fraunhofer  Ins;tute  for  Solar  Energy  Systems  ISE  

Solar 5.1%

By Week By Month

Wind 8.9%

Challenges  and  Opportuni5es  

• Increasing  number  of  PV  • Two-­‐way  power  flows  • IntermiZent  renewables  • Opera5on  coordina5on  • Voltage  control  • Protec5on  

Distribu5on  Scale  

• Extensive  loss  of  PV  genera2on  during  faults  

• Reduced  system  iner5a  and  stability  

• Increased  ramp  rate  requirement  

• Increased  requirement  for  genera5on  reserve  

Transmission  Scale  

Distribu5on  scale  

Smart  inverter  func5ons  

Energy  storage  and  flexible  load  

Secure  Communica5on  

Localized  integra5on  and  op5miza5on  

Transmission  Scale  

Smart  inverter  func5ons  

New  strategies  for  unit  commitment  

Solar  resource  forecas5ng  

Advanced  grid  planning  

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Reliability, stability, efficiency

Germany will need to retrofit 300k+ PV inverters, costing hundreds of million dollars. We have an opportunity to do it right the first time.

DOE  SunShot  SEGIS-­‐AC  Program  

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6  

(awarded in September 2011, three year program, $25.9 Million DOE funds) These six projects are developing cheaper and smarter power electronics and demonstrating with utility partners more

interactive control of PV systems to enable higher level grid integration of solar energy.

§  SolarBridge  -­‐    ACPV  §  GE  Global  Research  -­‐  microinverter  §  Alencon    -­‐  MW  inverter  

Topic 1: Smart grid functionality that makes it easier to integrate PV solar into the grid

§  University  of  Hawaii  –  residen2al  PV  §  EPRI  –  u2lity-­‐scale  PV  w/storage  §  AE  Solar  Energy  –  u2lity-­‐scale  PV  w/  storage  

Topic 2: Reduce the cost of power electronics and BOS

2010 Benchmark

SunShot Goal

Project  Partners  

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Smart  Inverter  Func5ons    

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For  Further  Discussions  

–  Contact  Guohui  Yuan  –  DOE  Solar  Technology  Office  (SunShot)    

–  Guohui.Yuan@ee.doe.gov  

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