抄録
The fan pitch blade control hydraulic actuator of a 500MW large-scale boiler is frequently operated under normal operation conditions. Common problems or malfunctions of the pitch blade control hydraulic actuators leads to the decline of boiler thermal efficiency and unexpected power plant electrical trip. In order to operate the power plant in a stable and reliable way, the best condition of the governor system can be maintained through the response characteristic analysis of the control device for the pitch blade control hydraulic actuator. The industry modernized during the early 1970's in Korea and made remarkable growth. This paper describes the proceedings of creating countermeasures after analysis and maintenance to be able to conduct operation safely in a power plant.
