Study on the Wind Turbine Transmission by Using Modbus

Modbus protocol is widely used in industry and easily applied. As wind turbine contains lots of electrical devices which require data transmission and control, The Modbus is one of the protocols which can be applied in wind turbines. In this study, the Modbus protocol is applied to the wind turbine based on the information model defined by IEC61400-25 to transfer the information among the devices of a wind turbine. A Modbus server was simulated to store the information of wind turbine based on IEC61400-25. The server loads existed wind turbine data and stores it into Data Table of Modbus. The Modbus client is designed to ask for wind turbine data based on the service defined in Modbus protocol. The Visual Studio integrated development environment is the platform used with C# programming language to implement RTU and TCP/IP communication methods defined by Modbus protocol. The RTU method is used for the devices which doesn’t have the internet capability. The TCP/IP method is used for the devices with internet capability. A Modbus simulator is established in this study. It can be realized as a wind turbine communication and control system when combined with the corresponding hardware.