Introduction  This paper considered the requirements of production monitoring and operation management in offshore wind farms, and analyzed the overall design, functional requirements, and subsystem requirements of the auxiliary monitoring system for offshore wind turbines.

  Method  This paper integrated the wind condition monitoring system (including vibration online condition monitoring system, wind foundation monitoring system, bolt load on-line monitoring system, blade condition monitoring system, generator insulation resistance automatic monitoring system, lightning remote detection system, gear box lubricant online monitoring system, box change operation monitoring system), video monitoring system, wind IP telephone system, extended functions, etc.

  Result  The system incorporates multi-parameter information fusion to achieve fault diagnosis of electrical and mechanical characteristics of wind turbines, providing support for the performance comparison of wind turbines in offshore wind power big data centers in Guangdong Province.

  Conclusion  In this way, preventive operation and maintenance can be realized, and a large number of corrective maintenance can be transformed into preventive maintenance, making it possible to intelligently monitor and early warning of wind farm.