System and method for power grid management

• US 8,738,191 B2
• Filed: 09/16/2011
• Issued: 05/27/2014
• Est. Priority Date: 09/17/2010
• Status: Expired due to Fees

• Current Assignee: Bruce Fardanesh, Georgios K. Stefopoulos, Jeffrey H. Lang, Jennifer Mayadas-Dering, Liana Menemenlis-Hopkins, Marija Ilic, Mark R. Graham, Robert D. Mohr, Sarantos K. Aivaliotis, Zenon R. Stelmak
• Original Assignee: Bruce Fardanesh, Georgios K. Stefopoulos, Jeffrey H. Lang, Jennifer Mayadas-Dering, Liana Menemenlis-Hopkins, Marija Ilic, Mark R. Graham, Robert D. Mohr, Sarantos K. Aivaliotis, Zenon R. Stelmak
• Inventors: Aivaliotis, Sarantos K., Stelmak, Zenon R., Mohr, Robert D., Ilic, Marija, Lang, Jeffrey H., Fardanesh, Bruce, Menemenlis-Hopkins, Liana, Mayadas-Dering, Jennifer, Stefopoulos, Georgios K., Graham, Mark R.
• Primary Examiner(s): Padmanabhan, Kavita
• Assistant Examiner(s): Everett, Christopher E
• Application Number:
  US13/234,610
• Publication Number:
  US 20120179301A1
• Time in Patent Office: 984 Days
• Field of Search: None
• US Class Current: 700/286
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/00 Systems supporting electrical power generation, transmission or distribution
• CPC Class Codes: Y04S 10/22 Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units

Abstract

A system for monitoring a power transmission line includes at least one monitoring device located along the power transmission line configured to provide power transmission line data. A wide area situational awareness module is configured to receive the power transmission line data and an adaptation module is configured to receive output from the wide area situational awareness module and further configured to calculate control actions for the power transmission line based on the power transmission line data.

Claims

1. A system for power grid management, said power grid having a plurality of generators, transmission lines, transformers, loads and control equipment, said system comprising:

a communication system for collecting voltage and current data from a first plurality of locations along said plurality of transmission lines,

wherein said voltage and current data is supplied to said communication system via at least one phasor measurement unit located along at least one of said power transmission lines in said grid,

and wherein said communication system is further configured to collect physical line data corresponding to real time ambient conditions associated with a second plurality of transmission lines selected among said transmission lines based on a determination of key lines based on combination of line flow limits and expected wind conditions on said second plurality of lines, said ambient conditions corresponding to thermal line limits of said second plurality of transmission lines indicating a maximum safe current that can be loaded onto said lines at said ambient conditions;

a state estimation module, configured to receive the voltage and current data from said first plurality of locations as well as said physical line data from said second plurality of transmission lines corresponding to said maximum safe current associated with said thermal tine limits and to generate a continuous series of real time state estimations of a totality of the operating conditions said transmission lines in said entire grid, said estimations including voltages and currents at every location of each of said lines in said grid;

a wide area situational awareness module configured to receive said continuous series of real time estimations output from said state estimation module that was based on said voltage and current data as well as said physical line data corresponding to thermal line limits of said second plurality of transmission lines in said grid and configured to retrieve equipment limit data and to generate a series of system states and limits based on the differences between said output of said state estimation module and said equipment limits; and

an adaptation module configured to receive an output from said wide area situational awareness module and further configured to calculate a continuous series of control actions for said control equipment based on said real time system state and thermal limits for said transmission lines as output from said wide area situational awareness module, said control actions including selection of transmission line usage of said plurality power transmission lines on said grid.

2. The system as claimed in claim 1, wherein said communication system is additionally configured to receive input from a plurality of monitoring devices, each located along said power transmission line and each configured to provide power transmission line electrical and thermal data.

3. The system as claimed in claim 2, wherein said monitoring devices are dynamic line rating devices and additional phasor measurement units.

4. The system as claimed in claim 1, wherein said output from said wide area situational awareness received by said adaptation module is said grid state and said static and dynamic power transmission line equipment limits, wherein said adaptation module is configured to calculate control actions for said control equipment based on said grid state and said static and dynamic power transmission line equipment limits.

5. The system as claimed in claim 4, wherein transmission line state, determined by wide area situational awareness module and received by said adaptation module includes at least a plurality of optimizable criteria, including at least criteria related to grid system reliability, transmission line operation cost, and transmission line efficiency.

6. The system as claimed in claim 5, wherein said adaptation module is configured to select at least one optimizable criterion from the available optimizable criteria to optimize using said calculated control actions.

7. The system as claimed in claim 6, wherein said calculated control actions are provided to a system operator as advisory actions.

8. The system as claimed in claim 6, wherein said calculated control actions are provided directly to said control equipment.

9. The system as claimed in claim 6, wherein said calculated control actions for said control equipment is configured to generate a calculated control action for a power transmission line control equipment to increase power throughput through said power transmission line above a power threshold called for under said worst case scenario (N-1) standards when said real-time power transmission line capacity and environmental factors exceed estimated power transmission line capacity and environmental factors defined by said worst case scenario (N-1) standards.

10. The system as claimed in claim 6, wherein said calculated control actions for said control equipment is configured to generate a calculated control action for a power transmission line control equipment to increase power throughput through said power transmission line above a power threshold called for under said worst case scenario (N-1-1) standards when said real-time power transmission line capacity and environmental factors exceed estimated power transmission line capacity and environmental factors defined by said worst case scenario (N-1) standards, such that after a first predefined contingency event, a transmission line system operator can adjust said control equipment back to a less vulnerable state using a smaller reserve requirement than if settings of said transmission line equipment were only adjusted off-line based on said worst case scenario (N-1-1) standard.