| Our country has rich water resources, and the hydropower station is one of themost important energy constructions strongly supported and recommended bygovernment. How to make use of the water resources reasonably and efficiently, andhow to ensure safety and stability of hydropower station operation, have became theimportant issue in hydropower station research. The key disciplines for economicoperation of hydropower station are operation efficiency, water consumption rates,power generation and etc, which are also the important analysis indicators forhydropower station to diagnose system fault and ensure system stability. In order toensure hydropower station operating safely, stably and economically, and detectingunusual phenomenon or hidden danger in time, it is necessary to monitor variousindex of hydro-generator units.According to the real-time monitoring requirements of hydropower stationoperation parameters, a kind of hydropower station operation state monitoring systemis presented, which is based on STM32F103VC. It realizes the detection of parameterssuch as the instantaneous flow, accumulated flow, working head, water consumptionrates, active power and efficiency, which characterize the work state of hydropowerstation. Through the transplanting of μ C/OS-Ⅱ operating system, it not onlycontrolled task switch and task scheduling, optimizes the software process, and alsoimproves performance and stability of the system. Further more, through theoptimization design of hardware circuits and the correction fitting of software, thecollection accuracy of the input signal such as differential pressure signal, the powersignal, the velocity signal are improved to0.05%, which are far better than thetraditional monitor. Meanwhile, with the optimization of digital-to-analog circuitdesign, the simulation current signal precision of instantaneous flow, working head,efficiency and water consumption rates, which is provided to monitoring centersecond instrument, is improved to0.04%, which is also far superior to the relevantregulations. In the part of data communications, to ensure the integrity and validity ofthe data transmission, we optimize signal protection and anti-jamming part. Byte errorrate in the process of remote automatic on-line monitoring is less than10-6.The design optimizes and improves the monitoring accuracy, monitoringstability and monitoring intelligence of the system of hydropower units. It is far superior to the requirements of<the hydropower station computer control system inthe basic conditions>.The system has been successfully used in many largehydropower station for monitoring hydro turbine operation parameters, and has beensold to Brazil and Vietnam. |
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