Time: May 2020.

Location: Zhangjiakou, Hebei.

Reasons for renovation: There are many brand specifications and models of the DC pitch control system configured for the unit. After many years of operation, there are problems such as high failure rate, high spare parts cost, and difficult maintenance.

Renovation scheme: Take Hopewind's integrated AC pitch drive as the core, and configure permanent magnet synchronous pitch motors, super capacitors, general-purpose PLCs, etc.

Renovation effect: The renovation was completed in May 2020 and has been operating stably after the renovation.