Load-Flow Program for Active Radial Distribution Systems

This paper presents a software development that is designed for low-voltage power distribution system analysis. The aim is to provide users an ability to estimate the overall system performance conveniently, and compatible with system data from the GIS. With an intuitive idea, the program has also been capable of large-area system analysis with convenience, and then displaying the results in graphical style. The input data management can even merge the essential details to the calculation directly. The key is power-flow analysis that the program was developed using backward-forward sweep technique, as to fully access the low-voltage power distributions - constructed in a combination of radial and imbalance. The program is able to adapt to each of the differences of several systems. What made this program particularly useful is that solar-cells can be included in for deeper analysis. The program has been verified using the standard IEEE 33-bus distribution system, and satisfied with the results reflecting its efficacy, compared with the commercial program MATPOWER.