Determination of load flow in direct current electrical systems

Details Determination of load flow in direct current electrical systems Determination of load flow in direct current electrical systems

1992-12-18

1994-10-25

Herndon, Heather R.

395155, 395, G06F 1500

Patent

active

053597117

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.

REFERENCES:
patent: 5222210 (1993-06-01), Leivian
patent: 5233686 (1993-08-01), Rickenbach et al.
patent: 5233688 (1993-08-01), Too

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