Development Of Data Acquisition And Monitoring System Based On DSP And Ethernet

As a clean and renewable energy source,hydropower has an extraordinary significance in the energy field.In recent years,with the continuous development of the power system,the development of China’s hydropower industry is accelerating.In order to ensure the stability and safety of the hydro-generating unit speed control system,it is necessary to monitor the condition of the speed control system.The key for state monitoring is to collect the various real-time state parameters of the monitored object.The function of the data acquisition and monitoring system is to collect real-time data of various key parameters in the speed control system,especially during the operation of the hydro-generating unit.In this paper,the signals that need to be collected and monitored during the operation of the hydro-generating unit speed control system are determined,such as analog signals,frequency signals and so on.At first,the characteristics of these measured signals are studied and analyzed.Then integrated with the corresponding data acquisition techniques,a high-precision data acquisition and monitoring system with 32-bit floating-point DSP TMS320F28335 as the core processor is designed and developed.This paper presents the hardware circuit of the system data acquisition module and signal generation module and develops the corresponding software program.Finally,the overall function of the data acquisition and monitoring system is realized.During the development of the data acquisition and monitoring system,the 100 M Ethernet communication chip is used to design the communication module to realize high-speed communication between the system and the server.In this data acquisition and monitoring system,the communication module is designed with the 100 M Ethernet communication chip.It can realize the high-speed communication between the system and the server.The high-performance ADC and DAC are used to design the analog-to-digital conversion module and the digital-to-analog conversion module.These two modules can ensure the speed and accuracy of data processing.The data acquisition and monitoring system can realize the acquisition and output of analog signals,frequency signals and switching signals.At the same time,it can conduct different operations and produce three-phase arbitrary frequency signals,including conversion and phase shift of three-phase signals and steps of voltage amplitude.In this paper,the designed system is completely tested.Through the analysis of the test results,the acquisition monitoring system can collect and monitor various signals during the operation of hydro-generating unit speed control system.And both the acquisition speed and accuracy can meet the design requirements.The system can be used not only for condition monitoring of the hydro-generating unit speed control system,but also for many high-precision data acquisition fields.