Dataset, quality report and downloads
Five-minute PLC telemetry from Ohito Hydropower Station, Hinokage-cho, Miyazaki Prefecture, Japan. Times are Japan Standard Time.
Data dictionary
Fields in the cleaned dataset and the original PLC column each one comes from.
Data-quality report
Every change made during cleaning is recorded in a bit-mask quality flag, so cleaned values can always be traced back.
Issues found and rule applied
Telemetry gaps in the raw file
Hidden stops: frozen inverter data
In these periods power, voltage, speed and the energy counter all stopped changing while pressure and temperature kept updating. The energy counter barely moved, so the unit was almost certainly not generating even though the last reading kept being logged.
Downloads
Summary tables produced by the pipeline. The full raw and cleaned five-minute files are included in the project archive, along with these tables under web/data/downloads, in case your browser blocks the download.