Design And Implementation Of Wireless Data Acquisition System For Wind Turbine Gearbox

In recent years,the problem of energy shortage and environmental pollution has been increasingly serious.Government of each country is actively developing and making use of clean energy.Since wind energy reserves are large and widely distributed,which has the development potentiality of commercialization and large-scale.At present,Wind Power Generation has gradually become one of the main ways to obtain electricity.The gearbox is the core component of the wind turbine generator system,and also one of the parts that occupies the highest failure rate because of its harsh working conditions and variable load.With complex structures and high costs,the gearbox failure can cause the entire system to be shuts down and huge economic loss.Therefore,it is extremely necessary to have real-time monitor of the operation of wind turbine gearbox.It can let the staff find omen of breakdown timely and take correspondent measures to reduce loss.The existing wind turbine monitoring system is generally based on wired transmission,and mainly monitors the impeller,yaw system and generator,etc.The monitoring of the gearbox is mainly focused on vibration,but rarely on the operating status of its mechanical components.Generally,it is only inspected by factory sampling,while not monitored during the operation of wind farm.In this paper,the operating state data of the wind turbine gearbox is collected by ZigBee wireless sensor network(WSN)and transmitted wirelessly to the remote host computer through the 4G network.This can effectively avoid the problems in the traditional wired monitoring system,such as complicated wiring,inconvenient maintenance and high cost.The specific research contents are as follows:First of all,this paper studies the structure,operation principle of the gearbox used in a wind farm in Inner Mongolia,analyzes causes and sign of the gearbox failure.Through these methods,the gearbox fault-prone location is clarified,and the type of acquisition parameters and the location of monitoring points are determined.There are three types of data that are primarily collected of the wind turbine gearbox,namely temperature,pressure and vibration.Then the software and hardware of the system have been designed according to the overall framework of the gearbox data acquisition system.In the aspect of the design of hardware,the ZigBee WSN adopts CC2530 as its main control chip and amplifies its radio frequency(RF)power through CC2591,and also uses SIM7600 CE 4G module for remote communications with the server.At the same time,the circuit and interface of all modules are designed.As for software,based on analysis of the structural framework and work-flow of the Z-stack,the functions such as coordinator gateway,router node,terminal equipment networking,data acquisition,analog-to-digital conversion and wireless communication are achieved by writing code in the IAR development environmentFinally,build the system's remote server,database and host user interface,and carry out a simulation experiment of the data acquisition system.In the experiment,the host computer can realize the display of remote data,the query of historical data,the expression of dynamic curve,and mark red alerts on parameters exceeding the set threshold.Experiments show that the system designed in this paper can successfully collect the gearbox operation data and display them remotely,which means that it meets the design requirements of this paper.