What is the difference between the *.PWB and *.PWD files used by Simulator and what are PowerWorld Project Files?
PWB and PWD stand for PowerWorld Binary and PowerWorld Display. The PWB files contain the actual power system data for the case. Traditionally, case files can contain large amounts of data. We store this data in a binary file to reduce the size of the file on your hard drive. Furthermore, data stored in a binary file may be read much more rapidly than a text file, allowing Simulator to load large cases more quickly. The PWD files contain the graphical data associated with the case. In other words, the sizes, shapes, colors, and locations of the graphical elements of the one-line diagram are stored in the display file. One common misconception is that the display files contain power system data. They do not. All power system data is stored in the PWB file. Bus Numbers serve as the key for our display files, allowing them to link with the power system data after they are opened. Simulator splits case and display data into two files so that one-line diagrams can be used with many differen
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