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:
Oct. 25, 1994
Filed:
Dec. 18, 1992
Michael J Hartmann, Cary, IL (US);
Glenn P McCarthy, Round Lake Beach, IL (US);
VECTRA Technologies, Inc., Federal Way, WA (US);
Abstract
A system and method (100,200) which uses a spreadsheet computer program having linked files in which the network architecture and the network element properties are entered and stored by the user. The overall network configuration information is input into a first, (INPUT) file type (102), which includes general parameters such as the battery terminal voltage, cable temperatures, bus (or node) names and bus interconnection information such as cable sizes and number of conductors per node. Cable impedance tables are available in a second, auxiliary (RESIST) file (112). Detailed loading information is entered in a third, (PANEL) file (128), which includes load description, load type (constant power or constant impedance), and load rating data and load status (on or off), which can be sequenced over time. These spreadsheets, or files, cooperate to automatically set up the appropriate YBUS admittance matrix file (120,124) and interactively compute voltages and currents using fourth type (CALC) files (122,126). Thus, the computed currents and short circuit fault currents are based on the actual computed node voltages. Preferably, the system and method include a graphics display module (1 LINE) (130,132), which generates a one line diagram on the display screen, along with the results of the load flow calculations.