公开(公告)号：US20210332797A1

公开(公告)日：2021-10-28

申请号：US17241214

申请日：2021-04-27

Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD. ,  MITSUBISHI POWER, LTD.

Inventor： Mitsuya BABA ,  Yasushi MORISHITA ,  Minoru SUGIURA ,  Kazuhiro TSUYUKI ,  Hideru SAKATA

IPC: F03D17/00 ,  F03D9/25

Abstract: A condition monitoring device for a wind turbine power generating apparatus provided with an auxiliary motor power supply system including a power-supply-side line connected to a power supply and a plurality of auxiliary-motor-side lines diverging from the power-supply-side line and connected to a plurality of auxiliary motors, respectively, comprises: a current measurement device for measuring a current flowing through the power-supply-side line; and a control device for controlling the plurality of auxiliary motors. The control device is configured to, when a generator of the wind turbine power generating apparatus is in a standby state where power generation is stopped at a low wind speed, execute a single sequential operation mode in which each of the plurality of auxiliary motors is singly and sequentially operated. The current measurement device is configured to measure a current flowing through the power-supply-side line during execution of the single sequential operation mode by the control device.