The Manwan Hydropower Plant Equipment Monitoring Technology

Key devices on-lining monitoring technology for hydropower plant includes three basic parts: test technology, state monitoring and faults diagnose. Along with the a enhancing proportion of dro electricity in the whole electricity system in our country, the increase of the single unit capacity, the faults ratio of the large-scale hydropower units is more and more important to the whole system safe operation, if we don't manage it well, it will cause the collapse of the whole system and bring a great loss of country's economy. In addition, accompany with "To dispart plant and grid, connect to the grid according to the price" put into practice, how to control the production cost of the power plant has to be put into consideration. To carry the unit faults diagnose system and change traditional plan periodic repair mode into the combination of plan repair with state repair, it will greatly reduce production cost and then enhance the competition ability of power plant. So the study of on-line monitoring system and test technology on large- scale hydropower units is very impendency and important.This article is based on the actual situation of key equipments in Man Wan power plant. It describes the aim, meaning and content of device on-line monitoring system and its application and development in and outside of the country, and also discuss the main fault type of large capacity unit, key technology and difficulty of this system. Make the most use of present test method to study the cause of fault, conformation of test parameters, suitable arrangement of the test spots, choose of sensors, criterion of faults and diagnose expert system, and take the vibration fault of hydrogenerator units as an instance, set up the on-line monitoring sysytem on key equipments in large scale hydropower plant..