Smart Grid Vision:  Vision for a Holistic Power Supply and Delivery Chain Stephen Lee Senior Technical Executive  Power De...
Smart Grid Two Way Communications….Sensors…….Intelligence Smart Grid Need an Objective Assessment of the Potential for Sma...
Smart Grid Two Way Communications….Sensors…….Intelligence Information & Communication Enabled Power Infrastructure Distrib...
Current State – System Operations 2-4 Sec scan rates Limited to info from lines and transformers at substations MW, MVAR, ...
Smart Transmission State – System Operations Higher speed scan rates Allows more frequent analysis of system state Enhance...
Grid Enabled Technology Pathway Renewables Integration and T&D Efficiency Improvement CAES: compressed air energy storage ...
End-to-End Power Delivery Chain Operation & Planning Data Communication Wide Area Control Sensors Monitoring, Modeling, An...
Most Needed Capabilities Requiring Research <ul><li>Hierarchical Integration of Entire Supply & Delivery Chain </li></ul><...
Layers For A Holistic Power Supply And Delivery Chain
Wide Area Coordination at the Control Center
Hierarchical Monitoring And Analysis
Source: California ISO Tehachapi, California Wind Generation in April – 2005 0 100 200 300 400 500 600 700 1 2 3 4 5 6 7 8...
Methods of Coping with Wind Uncertainty <ul><li>Short-Term </li></ul><ul><ul><li>Better wind forecasting </li></ul></ul><u...
Potential Role of the Virtual Service Aggregator
Alarm Management <ul><li>Alarm Management </li></ul><ul><li>Need to diagnose root-cause of alarm messages </li></ul><ul><l...
Why Accurate Load and Generator Models Are Needed? <ul><li>Inadequacy of current model data </li></ul><ul><ul><li>Inaccura...
Effective System Restoration Can Reduce The Societal Impact Of Widespread Blackouts Source: Mike Adibi, NSF/EPRI Workshop ...
Prevention of Cascading Outages – Safety Nets <ul><li>Application of SynchroPhasor Measurements for Controlled Separation,...
EPRI’s Grid Operations and Planning Research Understanding, Predicting, and Preventing Cascaded Outages (Black Out) Situat...
Most Needed Capabilities Requiring Research <ul><li>Hierarchical Integration of Entire Supply & Delivery Chain </li></ul><...
NASPI (North America Synchro-Phasor Initiative) <ul><li>Training Materials http://www.naspi.org/resources/training/trainin...
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Smart Grid Vision

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Realistic vision for a Smart Transmission Grid

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  • Smart Grid Vision

    1. 1. Smart Grid Vision: Vision for a Holistic Power Supply and Delivery Chain Stephen Lee Senior Technical Executive Power Delivery & Utilization November 2008
    2. 2. Smart Grid Two Way Communications….Sensors…….Intelligence Smart Grid Need an Objective Assessment of the Potential for Smart Transmission and the Path to Achieve it Hype
    3. 3. Smart Grid Two Way Communications….Sensors…….Intelligence Information & Communication Enabled Power Infrastructure Distribution Consumer Transmission Substation Markets Transmission Applications Maximize Asset Utilization Real Time State Estimation & Measurement Automate Asset Condition Assessment Enable Wide Area Monitoring & Control Automate Fault Location Integrate Demand Responsive Resources
    4. 4. Current State – System Operations 2-4 Sec scan rates Limited to info from lines and transformers at substations MW, MVAR, KV breaker status Limited Grid Visibility
    5. 5. Smart Transmission State – System Operations Higher speed scan rates Allows more frequent analysis of system state Enhanced Grid Visibility 750 +282j 250 +84j 100 +62j 20 + 8j 276 + 120j 130 + 8j 300 + 100j 750 + 262j 440 + 200j 120 + 11j 350 + 150j 227 + 420j 704 + 308j 2 3 4 5 7 6 1 8 9 10 11 12 13 14 15 16 17 176 +88j
    6. 6. Grid Enabled Technology Pathway Renewables Integration and T&D Efficiency Improvement CAES: compressed air energy storage FACTS: flexible AC transmission system HVDC: high voltage direct current RPS: renewable portfolio standards
    7. 7. End-to-End Power Delivery Chain Operation & Planning Data Communication Wide Area Control Sensors Monitoring, Modeling, Analysis, Coordination & Control End-uses & DR Distribution System Transmission System Energy Storage Fuel Supply System Fuel Source/Storage Power Plants Renewable Plants Controllers ZIP M Dynamic Load Models Dynamic Power Plant Models
    8. 8. Most Needed Capabilities Requiring Research <ul><li>Hierarchical Integration of Entire Supply & Delivery Chain </li></ul><ul><li>Optimal End-to-End Dispatch under Uncertainties </li></ul><ul><li>Dynamic Models of Generators and Loads </li></ul><ul><li>Online Alarm Root-Cause Diagnostics </li></ul><ul><li>Prevention of Cascading Outages, Safety Nets </li></ul><ul><li>Fast System Restoration After Blackouts </li></ul>Alarm Management Chain Integration Dynamic Models Protection SCADA Data Management Network Management Security Outage Management End-to-End Dispatch Restoration Protection
    9. 9. Layers For A Holistic Power Supply And Delivery Chain
    10. 10. Wide Area Coordination at the Control Center
    11. 11. Hierarchical Monitoring And Analysis
    12. 12. Source: California ISO Tehachapi, California Wind Generation in April – 2005 0 100 200 300 400 500 600 700 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Hour MW Could you predict the energy production for this wind park either day-ahead or 5 hours in advance? <ul><li>Average </li></ul>Each Day is a different color. <ul><li>Day 29 </li></ul><ul><li>Day 5 </li></ul><ul><li>Day 26 </li></ul><ul><li>Day 9 </li></ul>
    13. 13. Methods of Coping with Wind Uncertainty <ul><li>Short-Term </li></ul><ul><ul><li>Better wind forecasting </li></ul></ul><ul><ul><li>Carry more operating and spinning reserve to handle up and down ramps of wind output </li></ul></ul><ul><ul><li>Rapid coordination with demand response and energy storage </li></ul></ul><ul><li>Long-Term </li></ul><ul><ul><li>Build more energy storage, e.g., Compressed Air Energy Storage (CAES) </li></ul></ul><ul><ul><li>Controllable demand response </li></ul></ul><ul><ul><li>Holistic planning of transmission, generation and demand </li></ul></ul><ul><li>Virtual Service Aggregator </li></ul>Potential wind curtailment CAES
    14. 14. Potential Role of the Virtual Service Aggregator
    15. 15. Alarm Management <ul><li>Alarm Management </li></ul><ul><li>Need to diagnose root-cause of alarm messages </li></ul><ul><li>Need to link diagnosis to operator procedure </li></ul><ul><li>Current EMS alarm management uses technologies of the 1970s </li></ul><ul><li>Need to integrate all sources of data and messages, through a hierarchical approach </li></ul>
    16. 16. Why Accurate Load and Generator Models Are Needed? <ul><li>Inadequacy of current model data </li></ul><ul><ul><li>Inaccurate voltage recovery simulation after disturbances </li></ul></ul><ul><ul><li>Uncertainty about generator reactive power capabilities </li></ul></ul><ul><li>Implications </li></ul><ul><ul><li>Uncertainty about the stability margin of the power grid </li></ul></ul><ul><ul><li>Unaware of real risk of cascading blackouts or voltage collapse, or </li></ul></ul><ul><ul><li>Under utilization of available stability margin for greater economic benefits </li></ul></ul>Southern Co.’s GenVARR TM
    17. 17. Effective System Restoration Can Reduce The Societal Impact Of Widespread Blackouts Source: Mike Adibi, NSF/EPRI Workshop on Understanding and Preventing Cascading Failures in Power Systems, Oct 28, 2005. <ul><ul><li>Operators need online decision support for restoration strategies </li></ul></ul><ul><ul><li>How can automation be used to improve system restoration? </li></ul></ul>
    18. 18. Prevention of Cascading Outages – Safety Nets <ul><li>Application of SynchroPhasor Measurements for Controlled Separation, Load Shedding and Generation Rejection </li></ul><ul><ul><li>Controlled separation is an effective last resort to mitigate severe cascading failures </li></ul></ul><ul><ul><li>Voltage Instability Load Shedding </li></ul></ul><ul><ul><li>Online risk monitoring of potential cascading outages </li></ul></ul>
    19. 19. EPRI’s Grid Operations and Planning Research Understanding, Predicting, and Preventing Cascaded Outages (Black Out) Situational Awareness Reliability Assessment Modeling & Standardization Online Stability & Control System Restoration System Studies
    20. 20. Most Needed Capabilities Requiring Research <ul><li>Hierarchical Integration of Entire Supply & Delivery Chain </li></ul><ul><li>Optimal End-to-End Dispatch under Uncertainties </li></ul><ul><li>Dynamic Models of Generators and Loads </li></ul><ul><li>Online Alarm Root-Cause Diagnostics </li></ul><ul><li>Prevention of Cascading Outages, Safety Nets </li></ul><ul><li>Fast System Restoration After Blackouts </li></ul>Alarm Management Chain Integration Dynamic Models Protection SCADA Data Management Network Management Security Outage Management End-to-End Dispatch Restoration Protection
    21. 21. NASPI (North America Synchro-Phasor Initiative) <ul><li>Training Materials http://www.naspi.org/resources/training/training.stm </li></ul><ul><li>Work Group Meetings http://www.naspi.org/meetings/workgroup/workgroup.stm </li></ul>
    22. 22. Thank you
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