This paper discusses visualization methods of power systems to provide intuitive insight of static or dynamic behavior of power network, including a series of events to a blackout. Visualization study on power system has been getting attention among the researchers. Development of high performance computer system and software is addressing this research, which is spreading for both of static and dynamic studies, enables easy understanding of invisible phenomena in a generator or a network. So far, a table has been used to show the system condition, including voltage profile; real and reactive power flow distribution, phase angles, and these relationships. This paper discusses three examples of power network representations.
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