Work Plan

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=82 BGCOLOR="#006699" TEXT="#080000"> <div> <FONT SIZE="5" COLOR="#FFFFFF" FACE="Arial" ><B>IEA PVPS Task 11 - PV Hybrids and Mini Grids</B></FONT><B>     |     </B><A HREF="index.htm" TARGET="_top" TITLE="IEA PVPS Task 11 PV Hybrids and Mini Gr"><U><B>H</B></U></A><A HREF="index.htm" TARGET="_top" TITLE="IEA PVPS Task 11 PV Hybrids and Mini Gr"><U><B>ome</B></U></A></div> <div> <A HREF="id18.htm" TARGET="_top" TITLE="Mission"><U>Mission</U></A>   |   <B>Work Plan</B>   |   <A HREF="id17.htm" TARGET="_top" TITLE="Event Calendar"><U>Event Calendar</U></A>   |   <A HREF="id19.htm" TARGET="_top" TITLE="Contact Us"><U>Contact Us</U></A>   |   <A HREF="id20.htm" TARGET="_top" TITLE="Participant List"><U>Participant List</U></A>   |   <A HREF="id25.htm" TARGET="_top" TITLE="Related Links"><U>Related Links</U></A>   |   <A HREF="id26.htm" TARGET="_top" TITLE="Public Downloads"><U>Public Downloads</U></A>   |   <A HREF="id31.htm" TARGET="_top" TITLE="Participant Area"><U>Participant Area</U></A></div> <div> </div> </td> </tr><tr> <td valign="top" width=210 BGCOLOR="#FFCC66" TEXT="#080000"> <div> <A HREF="id18.htm" TARGET="_top" TITLE="Mission"><U>Mission</U></A></div> <div> <B>Work Plan</B></div> <div> <A HREF="id17.htm" TARGET="_top" TITLE="Event Calendar"><U>Event Calendar</U></A></div> <div> <A HREF="id19.htm" TARGET="_top" TITLE="Contact Us"><U>Contact Us</U></A></div> <div> <A HREF="id20.htm" TARGET="_top" TITLE="Participant List"><U>Participant List</U></A></div> <div> <A HREF="id25.htm" TARGET="_top" TITLE="Related Links"><U>Related Links</U></A></div> <div> <A HREF="id26.htm" TARGET="_top" TITLE="Public Downloads"><U>Public Downloads</U></A></div> <div> <A HREF="id31.htm" TARGET="_top" TITLE="Participant Area"><U>Participant Area</U></A></div> </td> <td valign="top" height=398 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <I>Work Plan</I></div> <div> Task 11's work plan is divided into four subtasks and a number of detailed work activities on key aspects of PV hybrid and mini-grid technology and implementation.  The current subtasks and activities are as follows:</div> <bR> <div> <I>(a)</I>      <U>Subtask  10</U>     Design Issues</div> <bR> <div> This Subtask addresses the complex nature of PV hybrid system design.  Tradeoffs have to be made between first cost, energy efficiency, and reliability.  Oversizing a system may increase reliability but also increase first cost.  Undersizing a system will decrease reliability and frustrate users.  The correct choice of components and system architecture is critical.  The task has the following three activities</div> <div> 11) Review, analysis and documentation of current hybrid mini-grid system architectures</div> <div> 12) Evaluation and comparison of system design methodologies and tools and development of guidelines for design tools</div> <div> 13) Development of best practices for design, operation, and maintenance of PV hybrid projects</div> <bR> <div> <I>(b)</I>      <U>Subtask 20</U>     Control Issues </div> <div>      </div> <div>   This Subtask addresses the need for new coordinating control mechanisms in hybrid mini-grids to maintain grid stability and to optimize the contribution of all generation sources.  It has the following five activities</div> <div> 21) Investigate existing methods for stabilizing voltage and frequency in mini-grids and develop new, improved methods if required</div> <div> 22) Investigate data communication architectures and protocols for mini-grids</div> <div> 23) Develop supervisory control parameters and strategies for mini-grids</div> <div> 24) Evaluate the role of energy storage technologies to stabilize mini-grid operation</div> <div> 25) Investigate technical issues associated with autonomous and interconnected operation of mini-grids and a main utility grid.  </div> <bR> <bR> <div> <I>(c)</I>      <U>Subtask 30</U>     PV Penetration in Mini-Grids                              </div> <bR> <div>     Subtask 30 addresses the goal of increasing the use of the PV resource in PV hybrid systems and displacing fossil fuel resources.  It has the following two activities</div> <div> 31) Develop performance assessment criteria for PV hybrid systems that allows for objective comparison of different systems</div> <div> 32) Develop recommendations to maximize the solar fraction in hybrid systems through demand side management, dispatch strategies and optimization of the battery energy storage system.</div> <bR> <div> <I>   </I></div> <div> <I>(d)     </I><U>Subtask 40</U>     Sustainability Conditions </div> <bR> <div>      Subtask 40 addresses the social, political, economic, and environmental factors necessary for successful implementation of PV hybrid power systems within mini-grids.  It has the following three activities</div> <div> 41) Develop case studies that demonstrate the social and political framework for successful operation of PV hybrid systems within mini-grids</div> <div> 42) Evaluate the financial aspects of PV hybrid power systems, considering both first costs and operating costs, and determine the conditions for economic sustainability</div> <div> 43) Evaluate the environmental impacts and benefits of PV hybrid systems with focus on greenhouse gas emission mitigation and potential for recycling of system components</div> <bR> <div> In general, the Task will follow a strategy, similar to previous PVPS Tasks, in which the current states of technology and design practice in the participating countries are first assessed and summarized.  Further work will then focus on those areas where technology improvements or better design practices are needed.  This may require new research or data, or simply an expert consensus on best practices.</div> <bR> <bR> <div> <IMG SRC="08019350.gif" border=0 width="793" height="565" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> <B>Work Plan Status - 2008</B></div> <bR> <div> Several changes in Subtask and Activity leaders during 2008 slowed progress on the Workplan. However Task 11 has completed the initial</div> <div> phase of data collection and analysis in several activities in the Workplan and has begun planning the deliverable reports which will</div> <div> be published in 2010 and 2011. Progress in individual subtasks is summarized below<FONT SIZE="3" COLOR="#231F20" FACE="RotisSansSerif" >.</FONT></div> <bR> <div> <B>SUBTASK 10: Design Issues</B></div> <div> Subtask 10 has surveyed available material on design of PV hybrid mini-grids, with a focus on design guidelines suitable for practitioners</div> <div> rather than research-oriented literature. It has also gathered information on the architecture and technical characteristics of</div> <div> installed PV hybrid mini-grids in numerous locations around the globe. This data will form the basis of the deliverable report on</div> <div> current hybrid mini-grid system architectures.</div> <bR> <div> Subtask 10 also continued its work on software design and simulation tools for PV hybrid mini-grids. A paper on the results of its survey</div> <div> of software design tools was presented at the 4th European Conference on PV-hybrid systems and Mini-grids. As an additional</div> <div> method of dissemination, and to begin the discussion on needed advances in design tools, Subtask 10 organized a Workshop on</div> <div> software design and simulation tools for PV hybrids and mini-grids in conjunction with the 23rd European Photovoltaic Solar Energy</div> <div> Conference in Valencia in September 2008. The workshop had presentations from software tool developers about the current status</div> <div> and future developments of software tools and presentations from the user community about their experiences using the tools and their</div> <div> needs for the future. The presentations from the Workshop can be found in the <A HREF="id26.htm" TARGET="_top" TITLE="Public Downloads"><U>Public Downloads </U></A>.</div> <bR> <div> <B>SUBTASK 20: Control Issues</B></div> <div> The first phase of this subtask is also to assess the current state of the art. Subtask 20 has used surveys, literature reviews, and</div> <div> expert assessments to gather the basic data. Chapter outlines or drafts were presented at the two Experts Meetings in 2008</div> <div> for most of the topics to be addressed in the deliverable reports.</div> <bR> <div> <B>SUBTASK 30: PV Penetration in Mini-grids</B></div> <div> The first draft of a set of performance assessment criteria for PV hybrid systems was peer reviewed by Task 11 participants. A final</div> <div> draft was presented and discussed at the second Experts Meeting in November 2008 and will be used as the basis for the deliverable</div> <div> report.</div> <bR> <div> <B>SUBTASK 40: Sustainability Conditions</B></div> <div> This Subtask is using a case-study approach which will study the sustainability conditions for a number of PV hybrid mini-grid systems</div> <div> in locations around the world. A total of 36 system descriptions using were submitted by Task 11 countries. The systems have a</div> <div> worldwide spread, with varying architectures, power ratings, and data availability. A short list of twelve systems was selected for</div> <div> detailed study. Unfortunately changes in Subtask and Activity leaders during 2008 have delayed these detailed studies. However progress</div> <div> was made on workplans and report outlines for the Activities on financial and environmental sustainability.</div> <bR> <bR> </td> </tr></table></body>