Control Systems for on-Line Surveillance of Steam Turbogenerators

摘要

The paper describes the characteristics of computerized systems developed in Italy for continuous data acquisition and for the malfunction diagnosis of steam turbogenerator groups. These systems receive signals (vibration pressure, temperature, ect.) both from the standard machine sensors and from a set of purposely installed sensors, termed VIBRO. Data acquisition and storage is completely computer controlled by purposely developed software; the mass storage capacity is so large as to have long endurance and to follow the possible evolution of the machine conditions both in the short and medium terms. Data are acquired not only during normal operation at rated speed and power, but also during run-up and run-down transients; this is very important to obtain early diagnosis of several possible malfunctions. The same systems are also used to obtain, on new turbogenerators, the machine ''baseline'', that is, a set of data used as a reference to keep under control the time evolution of the machine dynamic's behavior. The vibration specialists are assisted in this task by special software developed for file management and graphic data display. The paper describes the general organization of the systems and some examples are given of field data acquired both in transient and rated conditions. The data are displayed in the graphic form typical of the systems. (ERA citation 14:004400)