The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 1996
Filed:
Oct. 12, 1993
Marija Ilic, Sudbury, MA (US);
Xiaojun Liu, Belmont, MA (US);
Massachusetts Institute of Technology, , MA (US);
Abstract
A method and apparatus for directly controlling the net power flow on tie lines between different areas of a large electric power system, which provides automatic dynamic control to maintain the stability of the system. Utilizing a sensitivity matrix and simple measurements of real power output from each of the generators in a given area, it is possible to dynamically control the entire system in a way which accounts for loading changes in any area. The control can be implemented using a Flexible AC Transmission Systems (FACTS) technology controller which utilizes the measurements and sensitivity matrix from a given area to determine a derived net power flow from the first area to the remainder of the system, and for comparing the derived net power flow to a set point to provide an error signal which approaches zero as the controller adjusts, for example, a phase angle difference across the tie line to adjust the net power flow thereon. Alternatively, the derived net power flow can be used for scheduling the generation of power in a given area and/or to control a local controller at the generator level.