Abstract

As one of the most promising renewable energy resources, a large amount of wind energy has been implemented all around the world since 1990s. Increasing the size of the wind turbines and the harsh operating environment lead to the higher failure rates on the wind turbines compared with the other renewable resources. As a result, not only unplanned maintenance and repairments increases but also the downtime of the wind turbine increases the operational cost significantly. In addition, the long-distance transmission lines are required to transfer the wind generation power to the load centers due to the remote operation location of the wind farms. To improve the power transfer capability, the series-compensated lines are adopted in many cases. However, subsynchronous control interactions (SSCI) could happen between the series-compensated transmission lines and the wind turbines. This may damage the wind turbine components severely and cause stability issues in the power grids. Currently, various condition monitoring systems have been developed and applied for the wind turbines. Different SSCI detection mechanisms are also proposed in many studies. This article proposes a field-programmable gate array CPU-based holistic monitoring system which not only provides both condition and SSCI monitoring functions simultaneously in real time but also records the necessary data for the postevent analysis.