Design and Application of the Automatic Instrumentation for Dispatching Used in Hydraulic Model Test of Cascade Hydropower Stations

摘要

In this paper, we introduce modern information technologies as digital instrumentation and scientific computational utilities to the daily regulation model of the Three Gorges-Gezhouba Cascade Hydropower Stations (TGGCHS). From the perspective of the popular Digital River model used in hydrological features analysis, the practical model provides evaluable real-time information which may be used to reduce the ill-posed property of numerical calculations. Therefore, information obtained in the daily regulation model of TGGCHS helps to decrease the uncertainty of solution in Digital River. The hydrological parameters as flow velocity and flow pattern of the channel between the two dams in the model can be recorded simultaneously in the automatic instrumentation system. So the coupling relationships of different hydrological parameters, as well as different dispatching schemes are accurately recorded and then studied by using the linear system theory and their inversion method, which provides us means to study the regulation and anti-regulation dispatching of cascade hydropower stations. The informatization of the daily regulation model of the TGGCHS is realized in the following two levels: (1) Up to 9 observation points of flow velocity and water level are used in the measurement system, with time tags for all data obtained from the daily model of TGGCHSi (2) Efficient management of the mass data obtained by synchronous acquisition of hydrological parameters by using database technology, including the software functions of storage and synchronous display of the data with time marks, historical data repetition and evaluation of arrival time of the flow.