Set Phasors to Analyze Circuits

Overview

Objectives/Goals My purpose with Set Phasors to Analyze Circuits was to create an electrical circuit analyzer, which is a computer program that can find the current and voltage of an electrical circuit (containing resistors, inductors, capacitors, voltage sources, and current sources). Note that no actual circuit is involved; rather, it is all modeled on the computer. Methods/Materials I wrote the program in the Python programming language with the help of the Numpy and PyGUI packages, for matrix math and a graphical user interface respectively. It uses the extended sparse tableau algorithm for finding voltage and current, and uses phasors, complex numbers representing a sinusoid, to allow it to handle alternating current with the same code as direct current. Results The program produces the correct results and can plot them on a graph or output as an RDB file for analysis or plotting with an external program. It has a graphical user interface, though still uses text entry for the circuit model input. It can "sweep" multiple AC frequencies to demonstrate the frequency response of the circuit. Conclusions/Discussion I successfully created a circuit analyzer, and learned a lot of programming skills and circuit theory. Note: My actual abstract in my report contains a lot more circuit theory, but the hypothesis-experiment-result formatting of this abstract submission form does not let me go into detail.

Competition history

• CSEF 2011 Mathematics & Software · Entry S1415

Resources

• CSEF project summary ↗

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