2009 Scenario Reliability Assessment - NERC

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Scenario Reliability Self-AssessmentsInertial-response (the effective inertia of the generation as seen from the grid isoften zero)The ability to control the ramp rates (MW/minute) on wind turbines and/orcurtail outputThe ability to participate in primary frequency control (governor action,automatic generation control, etc.)In addition, improved wind plant models need to be developed, validated and standardizedfor all wind technologies, especially for use in conducting stability and transient analysisstudies.Appliance controllers and automated technologies that modify load characteristics, known as“smart-grid” technologies, can mitigate stress on the grid and prevent power outages during gridemergencies. Smart-grid technologies also can help integrate renewable energy resources into thegrid and may reduce the need to build generation, transmission, and distribution systems.Technologies can provide ancillary services, and possibly storage, both of which would facilitatethe integration of wind resources. However, further research and development work is necessary,and ISO-NE has undertaken a large, detailed wind integration study, which is outlined below.New England Wind Integration Study:In 2008, the ISO-NE issued a Request-For-Proposals (RFP) to conduct a New England WindIntegration Study (NEWIS). 63 The RFP has been awarded and the study is underway. A vendorteam led by General Electric (GE) Energy Applications and Systems Engineering with supportfrom three consultants (EnerNex, AWSTruewind, and WindLogics) is performing thecomprehensive wind power integration study. All the work must be conducted during 2009 and2010. The following subsections describe the drivers, goals, and the tasks of the ISO-NE study.DriversSuccessfully integrating large amounts of wind power into the power system presentstechnical challenges because the characteristics of wind power generation differsignificantly from conventional generation. These characteristics include limitedcontrollability and high variability of power produced by wind turbines and theuncertainty with which that amount of power produced can be forecast. To some extent,the variability and uncertainty inherent to wind power can be mitigated by increasing thegeographic diversity of the interconnected wind power resources. The operation andplanning of the New England power system would be affected by the expansion of windpower resources in New York and neighboring Canadian provinces. These resourceadditions in neighboring Regions would likely provide opportunities for closercoordinated operation among the systems, additional interregional power transfers, andnew bulk power transmission tie lines.GoalsThe goals of the NEWIS are as follows:63 Available on the ISO’s Web site: http://www.iso-ne.com/aboutiso/vendor/exhibits/index.html.2009 Scenario Reliability Assessment Page 85
Scenario Reliability Self-Assessmentsa) To determine, for the ISO-NE Balancing Authority Area, the operational,planning, and market impacts of integrating large-scale wind power as well as themitigating and facilitating measures available to ISO-NEb) To make recommendations for implementing these mitigation and facilitationmeasuresIn particular, the NEWIS will identify the potential adverse operating conditions createdor exacerbated by the variability and unpredictability of wind power and recommendpotential corrective activities for mitigating these adverse impacts. The study aims tocapture the unique characteristics of New England’s bulk electrical system and windresources in terms of load and ramping profiles, geography, topology, supply anddemand-side resource characteristics, and the unique impact that wind profiles could haveon system operations and planning as the overall penetration of wind power increases.TasksThe study is planned for completion by mid-2010 and is being structured around fivemain tasks:Task 1: Wind Integration Study Survey. The project team is conducting asurvey of national and international past and current wind integration studies onbulk electric power systems. This includes prior ISO-NE studies, such as Phases Iand II of the Technical Assessment of Onshore and Offshore Wind GenerationsPotential in New England, the New England Electricity Scenario Analysis, andactual wind integration experiences in bulk electric power systems. 64 Theobjective of the survey is to determine the applicability of these studies to futurework, such as the specific tools used in the wind integration studies. Theinformation captured during this task will be used to refine the assumptions anddeliverables of the remaining tasks of the study.Task 2: Technical Requirements for Interconnection. This task includes thedevelopment of specific recommendations for technical requirements for windgeneration, such as its ability to reliably withstand low-voltage conditions,provide voltage support to the system, and adjust megawatt output to support theoperation of the system. The task also will include data and telemetryrequirements, maintenance requirements and scheduling, high wind cutoutbehavior, and the development of “best practice” methods of the “equivalent loadcarryingcapability’ (ELCC) calculation for global and incremental wind powergeneration that is used for establishing capacity values.This task also will investigate and recommend wind power forecasting methodsfor both the very short-term timeframe, which is useful in real-time operations,and the short to medium-term timeframe, which is useful in unit dispatch and dayaheadunit commitment.64 Available on ISO-NE’s Web site located at: http://www.isone.com/committees/comm_wkgrps/prtcpnts_comm/pac/mtrls/2008/may202008/Page 862009 Scenario Reliability Assessment
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Table of ContentsTable of ContentsN
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Executive SummaryTransmission Criti
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Background Information for this Rep
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Scenario Reliability Assessment Sum
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About This Reporto Nuclear scenario
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Joint Coordinated System PlanThemat
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Joint Coordinated System Plan2009 S
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Scenario LetterScenario LetterDecem
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Scenario LetterIn an effort to add
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Scenario Letterd) Provide a table,
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Reliability Assessment Subcommittee
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Reliability Assessment Subcommittee
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the reliability of theto ensurebulk
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2009 Scenario Reliability Assessment - NERC

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