Animation Of A Power System Using Powerworld Simulator

During the junior year, the electrical engineering technology students are required to complete an introductory course in power systems analysis and design. Historically, this course was presented without requiring the use of the personal computer. This past year, the PowerWorld Simulator software 1 , packaged with the text book 2 was incorporated. With the power system analysis software, the student was given the capability to model complex power systems consisting of generators, transmission lines, and rotating/non-rotating loads. The software was capable of performing a load flow analysis of a power system. Also, the students could analyze various types of faults for determination of proper circuit breaker selection and bracing of bus work and cabling. Traditionally, calculations for load flow and fault current analysis of small power systems have been done by hand and/or modern scientific calculators. With the use of the animated simulation tool, the students obtained a good “feel” of what was happening within the complex power system. While teaching this course, the instructor has not abandoned the presentation of the hand calculations of these quantities. Basic power system analysis calculations are still presented, but concepts are enhanced with the use of the simulation tool. The students gain an appreciable understanding of the capabilities of the PowerWorld Simulator after the typical hand calculations are presented in class. This paper will examine the analysis (load flow and fault) of a simple power system using the PowerWorld Simulator software. The graphical results from the analysis will be presented so that one may gain an understanding of the capabilities of this tool and obtain an “animated picture” of a typical power system in the United States. Creation of the One-Line Diagram of the Power System With this software tool, the students use the provided graphical user interface (GUI) to draw the power system being analyzed. Included in the library are symbols for generators, buses, circuit breakers, transmission lines, filters, and 3 phase loads (rotating and static). The modeled power system for this paper is depicted in Figure 1. The system consists of (3) 22 kV buses, (2) generators, (3) transmission lines, (9) circuit breakers, (1) static load, and (1) power factor correction capacitor (PFC). Text fields have been provided to allow for displaying actual electrical quantities on the one-line diagram. For example, the per unit (PU) voltages and phase angles (degrees) are provided for each voltage bus. The actual power outputs (real and imaginary) are displayed for each of the generators. The actual power flows (real and imaginary) are provided for all transmission lines. The ratings of the connected load and PFC are included on the one-line as well. By careful creation of the power system one-line diagram using PowerWorld Simulator, the diagram becomes the actual report for describing the results of the P ge 11216.2