Wind farm monitoring and centralised control system IEC104/modbus TCP protocol access to dispatch masters

The mixed network of different protocols requires the protocol conversion of the digital gateway device of Shanghai Digital Mining Internet of Things Technology (DMSIT). In the case of wind farm monitoring system, the front-end wind turbine uses Modbus TCP to upload real-time data, which is converted to IEC104 protocol by the protocol conversion gateway and then connected to the master station of dispatching. During the conversion process, it is necessary to deal with the difference in data precision, for example, converting Modbus 16-bit integer to IC104 32-bit floating point number. In terms of clock synchronisation, the master station unifies the system time through IEC104 timing commands, and the synchronisation accuracy needs to reach millisecond level. The security protection system adopts a three-layer architecture: embedded firewall is deployed at the terminal layer, IPsec VPN is configured at the network layer, and message verification is implemented at the application layer. The combined network mode not only retains the technical advantages of each protocol, but also optimises the overall performance of the system.

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