Research Of Hydraulic Turbine Control System Based On Embedded System In Medium And Little Hydroelectric Power Station

There are many small and medium hydropower stations in China. Some of them have running many years without continual improvement in equipments and technology, which has a severe impact on normal operation of hydropower stations. So how to improve the equipments and technology of these hydropower stations with low expenses.Mechanical hydraulic turbine governor is widely used in small and medium hydropower stations. A research of hydraulic turbine control system based on embedded system is raised, which can finish the function of hydraulic turbine governor and hydrological monitor. According to the analysis about control system of hydraulic turbine, the system devices can be divided into acquisition devices and the main control devices of upstream flow. The acquisition devices of upstream are based on ATMEGA128, which is used to measure the flow of upstream in river. Then the data of flow is sent to the main control devices. The main devices are based on the S3C1440microprocessor, which is used to control the rotate of speed. Besides, the main control devices can predict the reservoir levels according to the weather, reservoir levels and flow of upstream, which provide strategies to help the operation and management of hydropower stations becomes an issue of concern.In order to monitor the speed of hydraulic turbine, speed measurement module and stepper motor control module are designed. And in order to monitor the hydrological information, measure modules of river levels, flow rate, rainfall, reservoir level and turbine flow are designed respectively.In the software design of system, the build of Linux operation system, kernel driver and application design are completed. To the question that the Linux operation system is not strong in real-time, the proposal to install PREEMTP_RT patch is chosen to improve real-time. In order to meet the functional requirements of hydraulic turbine control system, the system software achieves the function of data collection, data transmission, data processing, data display, turbine speed control and so on.In conclusion, the control scheme of hydraulic turbine in small and medium hydropower stations presented can control hydraulic turbine effectively and improve the operating efficiency of the hydropower stations.