Electric Quantity Test System of Unified Power Flow Controller Model on LabWindows/CVI

Unified Power Flow Controller (UPFC) is regard as the most representational device in the field of Flexible AC Transmission System (FACTS). In order to further study operation mechanism and physical characteristics of UPFC, a set of electric quantity test system is developed based on a 10KVA UPFC model, and the acquisition, storage, display and analysis of all electric quantity data are realized. In this study, a virtual instrument concept is adopted for the test system with modularization designed system hardware, which is composted of sensors, signal processing circuits, data acquisition cards and general PC. The data acquisition card is PCI-6023E by National Instruments (NI) CO. of U.S.. LabWindows/CVI, a software development system for measurement and control field is employed for the system application software development environment. A friendly and easy-operation user interface is in the electric quantity system with abroad general usages. Not only common functions such as collection and storage for real time data, but also quite powerful graphic display and data analysis functions can be achieved by the system. Two kinds are found to fit electronic signal analysis from some common used wavelet basis after comparison of analysis graphics which is presented at the end of this paper.