An easy-to-use software for subtransmission network analysis

This paper describes a graphical easy-to-use power system simulation software. The software is specially designed to meet the requirements of saving time and effort in its use. Visualization, automation of some manual procedures and solution of special problems in subtransmission networks has been realized. An efficient network diagram editor is introduced. The combined use of the network diagram and the automated substation diagrams facilitates network operation state setting and interpretation of results. Some practical techniques have been adopted to improve the convergence of load flow and var optimization computations. Furthermore, the automatic network topology analysis function has contributed a lot to error finding in the built network database and the input data of network status. It has been successfully used in two Chinese electric utilities. (C) 2000 Elsevier Science Ltd. All rights reserved.