Research on the Test and Simulation Analysis of Hydraulic Transient Process in Super-long and Large Water Diversion and Power Generation Systems

In order to analyze the dynamic response characteristic of typical hydraulic transient process conditions in super-long and large water diversion and power generation system,this paper takes JPII Hydropower Station（8 × 600 MW）as an example. The HYSIM simulation models of main elements in the system are established by the user-defined modeling function of HYSIM software,such as differential surge tank,Francis turbine,ring gate and so on. Based on the internal mechanism and operating characteristics of the system,the complete simulation model of the super-long and large water diversion and power generation system has been completed finally. Besides,the method of parameter calibration and correction for the main elements of the system is proposed. By the simulation model,two typical hydraulic transient process test conditions are simulated,here the involved test conditions are as follows:double load rejection and shun-down process of ring valve. At the same time,the calculated results are compared with the test results. The results show that the proposed simulation model can describe the dynamic response characteristic of the super-long and large water diversion and power generation system accurately and it can provide a reliable simulation platform for checking the extreme control conditions and studying long-term stable operation mechanism of the system.