Research Of Computer Control In Small Hydraulic Power Stations

With the development of automatic control theory and with the gradual progress and application of SCM, industrial controller, the computer control system has been much more widely used and promoted. It is urgent to renew the control equipment of hydroelectric power stations of medium and small scale due to their poor performance in the quality and the efficiency at present. This paper plans to monitor and control the generators and hydraulic turbine relying on the abundant hydroelectric resources in Guizhou Privince.In hydraulic power stations, speed governor of the hydraulic turbines is of great importance and is directly related to the quality of electric energy production. Hydraulic turbine adaptive system is a typical one with high rank, time-varying, non-minimum phase; moreover, it is a nonlinear system whose parameters vary with operating conditions. It is vital to design and advance the computer control strategies of hydraulic turbines to ensure their stability, security and efficiency. The control strategy with fuzzy has a simple structure and robustness. Simulation tests indicate that it can improve the static and dynamic state characteristics and is reliable.This paper discusses the design of the computer control and monitor of generators and hydraulic turbines in small hydroelectric power stations, with the illumination on the structure and characteristics of control system. Aggregation-distribution control system is widely used in modern control systems. First the basic structure and characteristics of aggregation-distribution control system are introduced, and then the structure of computer control system in hydraulic power stations and the general plans are described. Entire system is a stratified, distributed aggregation-distribution control system, which is mainly made of the main control layer and the on-site control unit. It can realize the functions such as equipment protecting, measuring, controlling and message-passing etc., thus unmanned watch is feasible. This paper introduces the control strategies of governor in hydraulic turbines. It also emphasizes on the fuzzy control of hydro turbine and the method of fulfillment; moreover it has been simulated by SIMULINK of MATLAB software package.