| NSF Org: |
CNS Division Of Computer and Network Systems |
| Recipient: |
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| Initial Amendment Date: | September 17, 2012 |
| Latest Amendment Date: | September 17, 2012 |
| Award Number: | 1239366 |
| Award Instrument: | Standard Grant |
| Program Manager: |
David Corman
CNS Division Of Computer and Network Systems CSE Directorate for Computer and Information Science and Engineering |
| Start Date: | October 1, 2012 |
| End Date: | September 30, 2016 (Estimated) |
| Total Intended Award Amount: | $750,000.00 |
| Total Awarded Amount to Date: | $750,000.00 |
| Funds Obligated to Date: |
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| History of Investigator: |
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| Recipient Sponsored Research Office: |
201 ANDY HOLT TOWER KNOXVILLE TN US 37996-0001 (865)974-3466 |
| Sponsor Congressional District: |
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| Primary Place of Performance: |
Knoxville TN US 37996-0003 |
| Primary Place of
Performance Congressional District: |
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| Unique Entity Identifier (UEI): |
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| Parent UEI: |
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| NSF Program(s): |
Information Technology Researc, CI-TEAM, CPS-Cyber-Physical Systems |
| Primary Program Source: |
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| Program Reference Code(s): |
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| Program Element Code(s): |
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| Award Agency Code: | 4900 |
| Fund Agency Code: | 4900 |
| Assistance Listing Number(s): | 47.070 |
ABSTRACT
This project develops an integrated framework of communications, computation and control for understanding wide-area power system performance in the face of unpredictable disturbances. The power system is chosen as a particularly challenging cyber physical system (CPS) due to its extreme dimension, geographic reach and high reliability requirements. The following tasks are studied in the proposed research: (a) a Partial Difference Equation (PdE) framework to model the impact of network topology on the power system stability; (b) the design of a communication network for CPS, based on the PdE modeling;(c) the design of a control system, which addresses the challenges such as fast response and resource constraints; (d) the design of a computing infrastructure, which addresses the computation for controlling the power network, in particular, the communication complexity for controlling the power network in both cases of one-snapshot computation and iterative computations; and (e) the test and evaluation for both small scale system models of several hundred buses and very large system models of ~50,000 buses.
This work contributes to the broader understanding of CPS with high reliability requirements, particularly, critical infrastructures such as the power grid. Modern infrastructures are complex systems of communications and computation tied to the controls of the physical system. The proposed research contributes to improved reliability by addressing the propagation of disturbances and advancing the understanding of geographically distributed CPS. The PIs plan to open multiple courses on CPS related to the proposed research.
PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH
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PROJECT OUTCOMES REPORT
Disclaimer
This Project Outcomes Report for the General Public is displayed verbatim as submitted by the Principal Investigator (PI) for this award. Any opinions, findings, and conclusions or recommendations expressed in this Report are those of the PI and do not necessarily reflect the views of the National Science Foundation; NSF has not approved or endorsed its content.
Intellectual Merit
This work sought to develop a integrated framework of communications,
computation and control for understanding wide-area power system performance
in the face of unpredictable disturbances. The primary contributions of this work include:
- introduced a wave-based model with partial differential equations to represent the spatial distribituion of the power grid. This model informs the traditional model that cannot capture the wave-like phenomena of disturbances clearly. We have a developed a distributed control approach with spatial variation in both voltage magnitude and phase.
- investigated traditional ordinary differential equation models for trade-offs between centralized, decentralized and distributed controls in limiting the impact of disturbances.
- - developed robust control methods for fault tolerance based on the concepts of reconfiguration for virtual sensors and virtual actuators.
- created a new framework for switched mode design of the grid for remedial action schemes
- designed new communication schemes, including source coding and data traffic scheduling, that are aware of physical dynamics. For the source coding, the quantization scheme for the system state uses a codebook that is adaptive to the system state of the physical dynamics. For data traffic scheduling in networks of physical dynamics, the transmission opportunity is scheduled based on the situation of available packets by employing dynamic programming.
Broader Impacts
The inter-disciplinary essence of the proposed research lent itself to cross-disciplinary collaboration and education. Investigators in applied mathematics, communications systems, control theory and power systems jointly guided graduate students and developed new course curricula. The concepts developed in this work have broad application in cyberphysical systems. The PIs worked closely with the outreach and REU programs of the CURENT Center at UTK.
Last Modified: 12/30/2016
Modified by: Kevin L Tomsovic
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