Research on Dynamic Properties of Long Pipeline Monitoring System of Air Cushion Surge Chamber

Air cushion surge chamber (ACSC) is a new type of pressure reduction device with some unique advantages like protecting the surface of the natural environment in hydropower plants. However, the inner air pressure of the ACSC could be as high as more than 3 MPa, the monitoring system requires high accuracy and reliability to keep it working safely. In this paper, according to model test and numerical simulation, the dynamic response of the far distance monitoring system of ACSC with "long measuring pipelines" called long pipeline monitoring system (LPMS) is studied, one new method to deal with the measured data and a simulation mathematical model are developed. Based on the model, the possible measured results of the major transition conditions of Muzuo hydropower plant in China have been simulated and forecasted. The corresponding conclusions have been applied in the design of ACSC, practical monitoring, analysis and operation in Muzuo power plant. So far, the power plant has been in safe operation for about two years, thus the rationality of the analysis method and the mathematical models developed in this paper can be well confirmed.