REMOTE MONITORING DEVICE, POWER GENERATION SYSTEM, AND REMOTE MONITORING DEVICE CONTROL METHOD

A SCADA system (14) includes a main switching hub (42) and a backup switching hub (44) that relay transmission data between a wind turbine generator (12) and terminals provided in another SCADA system (16) and client terminals (66), and a network switch (46) for performing switching between the main switching hub (42) and the backup switching hub (44) for relaying transmission data between the wind turbine generator (12) and the terminals. A backup remote I/O (48) connected to the backup switching hub (44) causes the network switch (46) to perform switching based on a switching command from a SCADA terminal input via the backup switching hub (44). This serves to solve a data transmission problem caused by a problem in a switching hub on the wind turbine generator side from a remote location.