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  • EPRI CSI4 Profile For CA Rule 21 Demonstration i Application Note  

    Document Number: A32034

    Status: APPROVED

    Version 1.0

    Approved Date: September 30, 2014

    EPRI  CSI4  Profile  For  CA  Rule  21   Demonstration     SunSpec Alliance Application Note Contributors:

    John Nunneley, Tom Tansy, Bob Fox, Brian Lydic, Meinhard Stalder, Tim Zgonena, Jay Johnson, Gary Aumaugher, Brian Seal, Steven Robles, TJ Vargas

    Abstract

    This document describes the SunSpec conformance requirements for smart inverters participating in the EPRI CSI4 demonstration project. As such, it serves as the initial draft of SunSpec conformance requirements for California Rule 21 smart inverters.   Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the CPUC, Itron, Inc. or the CSI RD&D Program.

  • EPRI CSI4 Profile For CA Rule 21 Demonstration Application Note

    ii  

    Copyright © SunSpec Alliance 2009-2014. All Rights Reserved.

    All other copyrights and trademarks are the property of their respective owners.

    License  Agreement  and  Copyright  Notice   This document and the information contained herein is provided on an "AS IS" basis and the SunSpec Alliance DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY OWNERSHIP RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

    This document may be used, copied, and furnished to others, without restrictions of any kind, provided that this document itself may not be modified in anyway, except as needed by the SunSpec Technical Committee and as governed by the SunSpec IPR Policy. The complete policy of the SunSpec Alliance can be found at www.sunspec.org.

    Prepared by the SunSpec Alliance

    4030 Moorpark Avenue, Suite 109

    San Jose, CA 95117

    Website: www.sunspec.org

    Email: info@sunspec.org

  • EPRI CSI4 Profile For CA Rule 21 Demonstration iii Application Note  

    Revision  History   Revision Date Reason

    DRAFT 1 8/14/2014

    Initial Draft.

    DRAFT 2 8/18/2014 Incorporate comments from first review with Sandia.

    DRAFT 3 8/20/2014 Incorporate comments from first review with Fronius.

    DRAFT 4 8/24/2014 Minor edits.

    DRAFT 5 9/5/2014

    Incorporate comments from B.Seal, T.Tansy.

    DRAFT 6 9/9/2014 Incorporate SunSpec Workgroup review comments.

    APPROVED 1.0 9/30/2014. Final draft.

       

  • EPRI CSI4 Profile For CA Rule 21 Demonstration iv Application Note  

    iv  

    About  the  SunSpec  Alliance     The  SunSpec  Alliance  is  a  trade  alliance  of  developers,  manufacturers,  operators  and   service  providers,  together  pursuing  open  information  standards  for  the  distributed   energy  industry.  SunSpec  standards  address  most  operational  aspects  of  PV,  storage   and  other  distributed  energy  power  plants  on  the  smart  grid—including  residential,   commercial,  and  utility-­‐scale  systems—thus  reducing  cost,  promoting  innovation,   and  accelerating  industry  growth.    

    Over  70  organizations  are  members  of  the  SunSpec  Alliance,  including  global  leaders   from  Asia,  Europe,  and  North  America.  Membership  is  open  to  corporations,  non-­‐ profits,  and  individuals.  For  more  information  about  the  SunSpec  Alliance,  or  to   download  SunSpec  specifications  at  no  charge,  please  visit  www.sunspec.org.  

    For  more  information  or  to  download  a  SunSpec  Alliance  specification,  go  to   http://www.sunspec.org/specifications.  

     

  • EPRI CSI4 Profile For CA Rule 21 Demonstration v Application Note  

    Table  of  Contents     Introduction  .................................................................................................................................................  1  

    CA  Rule  21  Communication  System  Overview  ........................................................................  1  

    SunSpec  Information  Modeling  ......................................................................................................  2  

    CA  Rule  21  Profile  Information  Models  ......................................................................................  2  

    SunSpec  ‘C’  and  ‘Python’  API  Interface  ........................................................................................  4  

    SunSpec  System  Validation  Platform  ...........................................................................................  4  

    Installing  &  Configuring  CA  Rule  21  Communication  Interfaces  ..........................................  4  

    Communications  Interface  ...............................................................................................................  4  

    Modbus  Map  Location  ........................................................................................................................  4  

    Modbus  Map  Layout  ............................................................................................................................  5  

    CA  Rule  21  Functions  and  SunSpec  Information  Model  Details  ............................................  5  

    CA  Rule  21  Phase  1  Functions  .........................................................................................................  6  

    Anti-­‐Islanding  Protection  .............................................................................................................  6  

    Low/High  Voltage  Ride  Through  ..............................................................................................  6  

    Low/High  Frequency  Ride-­‐Through  .......................................................................................  7  

    Volt-­‐VAr  Mode  with  Watt  Priority  ............................................................................................  8  

    Ramp  Rates  .........................................................................................................................................  9  

    Fixed  Power  Factor  .........................................................................................................................  9  

    Soft  Start  ............................................................................................................................................  10  

    CA  Rule  21  Phase  2  Functions  .......................................................................................................  10  

    Data  Model  ........................................................................................................................................  10  

    Monitor  Alarms  ...............................................................................................................................  10  

    Monitor  DER  Status  and  Output  ..............................................................................................  11  

       

  • EPRI CSI4 Profile For CA Rule 21 Demonstration vi Application Note  

    vi  

    CA  Rule  21  Phase  3  Functions  ............................................................................................................  11  

    Limit  Maximum  Real  Power  ......................................................................................................  11  

    Connect  /  Disconnect  ...................................................................................................................  12  

    Provide  DER  Information  at  Interconnection  /  Startup  ...............................................  12  

    Initiate  Periodic  Tests  of  Software  and  Patches  ...............................................................  12  

    Frequency-­‐Watt  Mode  .................................................................................................................  12  

    Voltage-­‐Watt  Mode  .......................................................................................................................  13  

    Scheduling  of  Operations  ...........................................................................................................  14  

    Appendix  ..............................................

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