Analysis and Response Measures for the Unsafe Incident of Abnormal Opening of Gate No.23 at Taoyuan Hydropower Station
This paper analyzes the abnormal opening incident of gate No.23 at the Taoyuan Hydropower Station.Through on-site analysis,it was found that the root cause of this abnormal opening was due to the PLC(Programmable Logic Controller)being subjected to power interruption and restoration shocks,resulting in PLC crash and erratic outputs.This led to the erroneous issuance of the gate opening command as the gate control circuit lacked fault locking functionality,ultimately resulting in the unsafe incident of gate No.23 being opened unexpectedly.To prevent similar incidents from recurring,modifications were made to the gate control system,which proved feasible through long-term testing.This experience can serve as a reference for similar situations.
abnormal opening incident of gateProgrammable Logic Controllerpower interruption and restoration shocksfault locking
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