Solar Shield - Forecasting and Mitigating Solar Effects on Power Transmissions Systems Pulkkinen, A., M. Hesse, S. Habib, F. Policelli, B. Damsky, L. Van.

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Presentation transcript:

Solar Shield - Forecasting and Mitigating Solar Effects on Power Transmissions Systems Pulkkinen, A., M. Hesse, S. Habib, F. Policelli, B. Damsky, L. Van der Zel, D. Fugate, W. Jacobs April 29, 2008, Space Weather Workshop, Boulder, CO 1

Overview In Solar Shield, we develop an experimental system to forecast space weather effects on the North American power grid; project funded by NASA’s Applied Sciences Program. Focus on first-principles-based space weather modeling. NASA/GSFC/CCMC and Electric Power Research Institute (EPRI) the key players. April 29, 2008, Space Weather Workshop, Boulder, CO 2

3 Geomagnetically induced current (GIC)

Societal effects April 29, 2008, Space Weather Workshop, Boulder, CO 4 GIC causes saturation of power transformers: Transformer damage Electric blackout Prior warnings of large GIC are needed.

System requirements (summary) Two-level GIC forecasts: –Level 1 providing 1-2 day lead-time. –Level 2 providing min. lead-time. Coupling to EPRI’s SUNBURST decision support tool. April 29, 2008, Space Weather Workshop, Boulder, CO 5 Used by the electric power transmission industry to mitigate GIC.

Level 1 forecasts April 29, 2008, Space Weather Workshop, Boulder, CO 6

Level 1 forecasts April 29, 2008, Space Weather Workshop, Boulder, CO 7 Solar observations of eruptive events are used to compute “cone model” parameters. NASA/ESA SOHO/LASCO data used. Plasma “cone” introduced to the inner boundary of a heliospheric MHD model (ENLIL). Model propagates the disturbance to the Earth. Computations carried out at the Community Coordinated Modeling Center. MHD output at the Earth used in a statistical model providing probabilistic estimate for GIC at individual nodes of the power grid. GIC forecast file is generated.

Level 1 example April 29, 2008, Space Weather Workshop, Boulder, CO 8

Level 2 forecasts April 29, 2008, Space Weather Workshop, Boulder, CO 9

10 Lagrange 1 observations used as boundary conditions for magnetospheric MHD. NASA’s ACE data used. Magnetospheric MHD model (BATS-R-US) used to model the magnetospheric-ionospheric dynamics. Computations carried out at the Community Coordinated Modeling Center. Magnetospheric MHD output used to drive geomagnetic induction and GIC code providing GIC at individual nodes of the power grid. GIC forecast file is generated.

Level 2 forecast example April 29, 2008, Space Weather Workshop, Boulder, CO 11 Oct 24, 2003

Coupling to the SUNBURST decision support tool April 29, 2008, Space Weather Workshop, Boulder, CO 12 % Level 1 GIC forecast produced by REALTIMEGIC_LEVEL1 % % The format of the data is as follows: % lat1 lon1 lat2 lon2... % yy mm dd hh mi GIC1low GIC1high GIC2low GIC2high... % % Level 2 GIC forecast produced by REALTIMEGIC_LEVEL2 % % The format of the data is as follows: % lat1 lon1 lat2 lon2... % yy1 mm1 dd1 hh1 mi1 ss1 GIC1 0 GIC % %

Summary Solar Shield designs and establishes an experimental two-level GIC forecasting system that utilizes first- principles-based space weather modeling; final product of the project are recommendations for an optimal system. Level 1 and 2 GIC draft forecasts are being generated in real-time. Optimization and validation of the forecast system underway. Coupling to the SUNBURST DST and evaluation of the economic value of the forecasting system underway. April 29, 2008, Space Weather Workshop, Boulder, CO 13