Research On Hydraulic Turbine Model Test Monitoring And Control System

Presently, water and electricity construction in our country has developed very quickly. Large-scale water and electricity projects are being constructed such as the Three Gorges Project, the Project of Electricity in the West delivering to the East. Small water and electricity projects in the countryside are prospering. All of these must have made the significant contribution to alleviate the energy short condition in our country. At the same time, as the inevitably trend of development the hydroelectric power station must have its units load optimizing and the running economically. Therefore, it is very important to enhance the test precision of the water frame universal test bench and to gather, process and monitor online of the data in hydraulic test.The quality of the hydraulic turbine model test monitoring and control system is the key to units. The previous system is the 2 reconstruction project of DONGFANG ELECTRICAL MACHINERY CO., LTDOn the base of the reliability and the advancing of the system and taking into account of sensors and the other dispersive I/O signals being frequent switch and the complicated field conditions, the system is designed as follows: PC takes charge in centralized management, PLC controls fields'devices, and field data is transferred by field bus. All of those form the distributed control system. The system can overcome Signal in the process of long-distance transmission attenuation and interference.DONGFANG ELECTRICAL MACHINERY CO., LTD and SHINE CO., LTD have funded this project. The test monitoring and control system in this paper includes two parts ---- the top layer system and the bottom layer system. The bottom layer system relies on the hydraulic turbine model big energy test platform, consisting of many kinds of sensors, the system of gathering data, PLC and so on. The sensors include flux sensor, tension sensor, torque sensor, temperature sensor and so on. We use NI DAQ as the data gathering equipment. PLC is used to start up and stop the whole test device, set working parameter and collect real information of the test device. All of those make sure of the high reliability of the system.The top layer system is based upon LabVIEW. It can realize data exchange and real-time data sharing by using OPC Server and DataSocket Server carried by LabVIEW, build up test database, monitor the entire test process and realize the computer-aided computing function. All of those are used to achieve anticipative control results of system parameters.In the whole research, we mainly participate in the top layer system constructed by LabVIEW. it is composed by the hardware platform and the application software part. The hardware platform of virtual instrument system is composed by the computer hardware and the I/O interface equipment(based on the PXI test system);In the software the modularized program includes the data acquisition module, the data analysis module (for example sensor non-linearity fitting, pulsation profile FFT spectral analysis and so on), the data processing module (inserting the C language to carry on formula computation), the data graphical displaying module, the file archive module (preservation and transformation of test curve, design parameter and so on) as well as the communication and the data exchanging module (OPC agreement data exchanging). It is proved practically that this system has many advantages, such as excellent real-time ability, high reliability, rapid processing speed and so on.