Introduction to the Modbus protocol PLC wireless monitoring of wind power

the sustainable development of wind power is a kind of renewable clean energy. Has always been a country strongly advocated and development of the energy project has important economic value. The installed capacity of wind power of domestic power ratio is 4%, visible and huge potential for future wind power development space. Wind power control system is mainly divided into three parts:

1, the wind field unit the control unit, the implementation of the unit parameters monitoring, power control and equipment protection function is the core part of the fan control;

2, high-speed circular redundant communication unit, is the scene generator and remote operations centre HMI real-time interactive highway

3, the entire PC operation center, has the complete parameters of the unit state monitoring, alarm, real-time/historical data record function and implementation of wind place is real-time operating unit.

presentation

$hk special focus on wireless communications industry, after years of industrial data communication practices can provide a variety of wind ring redundant communication scheme. Mainly include wireless lora and 4 g communication solution.

lora wireless communication solutions

or domestic fan blower unit adopts bachmann PLC PLC control the parameters of wind field unit, E90 - million usd DTU( 433C30) Using RS485 docking PLC control unit communication, lora wireless point-to-point communication corresponding E90 - DTU( 433 c30e) Using Ethernet gateway access Ethernet switch or control station. PC HMI access network platform, through the modbus protocol monitor fan operation.

4 g base station communication solution

fan units bachmann PLC controller or domestic same fan PLC control the parameters of wind field unit, using RS485 connection E840 - DTU( 4 g - 02) PLC control unit using a serial port communication, docking by telecom operators will fan base station network real-time data uploaded to the cloud platform project system, remote operations center PC HMI network access cloud platform, through the modbus protocol monitor fan operation.

scheme contrast

the table is a summary of scheme comparison, from the table we can see how the wireless lora communication scheme suitable for no telecommunications operator base station network signal coverage in remote areas of remote wireless solutions save the cost of wiring. If wind farm area covered with 4 g signals, it is recommended to use 4 g communications DTU E840 - DTU( 4 g - 02) Meet the demand of higher requirements of the real-time monitoring.

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