基于LabVIEW和Modbus/TCP的风电数据采集系统设计

Design of the Wind Power Data Acquisition System Based on LabVIEW and Modbus/TCP

针对现有风电数据采集系统单次采集数据量不足、数据传输效率不高、开发程序与维护周期较长等问题,开发了一种基于Lab VIEW和Modbus/TCP通信协议的实时数据采集系统。该系统安装于风电机组配电柜工业计算机上,可独立调试运行。其核心部件直接调用Lab VIEW中的Modbus/TCP通信函数库,以实现工业以太网通信。与传统人机界面(HMI)开发需要建立Modbus I/O服务器相比,该系统开发步骤更简单;相比于串口通信,以太网组网范围广、兼容性好、抗干扰能力强,满足风电场数据通信量大、通信环境复杂等实际应用要求。系统已投入多个风场使用,可以实现风机数据实时采集、处理、存储,保证在异常通信、电源等状态下的采集模式自动转换。用户进行远程监控的同时,可根据实际需要和工况配置功能文件,并通过导出状态记录日志和存储数据包进行相应的数据分析。系统运行收集得到的数据为研究风电系统的运行状态提供了依据。

A real-time data acquisition system based on Lab VIEW and Modbus/TCP communication protocol is developed to solve the problems of insufficient data acquisition,low data transmission efficiency,long development program and long maintenance period for existing wind power data acquisition systems. The system is installed in the industrial PC located in wind turbine power distribution cabinet,and operated independently. Its core component directly calls the Modbus/TCP communication function library in Lab VIEW for implementing industrial Ethernet communications. Compared with the traditional human-machine interface（ HMI） development which requires to establish a Modbus I/O server,its development steps are simpler; compared with serial communication,Ethernet has wider range of networking,good compatibility,and strong anti-interference ability,it meets practical application requirements such as large data traffic volume and complex communication environment in wind farms. The system has been used in many wind farms,which can realize real-time data collection,processing,and storage,ensure the automatic conversion of collection modes in abnormal communication and power supply conditions. Users can remotely monitor and configure function files according to actual needs and operating conditions,and analyze corresponding data by exporting status logs and storing data packets. The data collected provide a true basis for studying the operating status of the wind power system.