Hydro Power Condition Monitoring

HydroCord is the solution Flow Design Bureau AS delivers for data collection, initial analysis and data transport and adapted needs in hydropower plants. HydroCord is intended to uncover long-term trends related to the condition of machinery and waterways, but at the same time provide information that is relevant for planning production and operation in the short term.

Today, three power station versions of HydroCord v3 have been installed, one station will be put into operation in the spring of 2022 and three existing installations will be updated to v3. The development of HydroCord is now based on a roadmap that is maintained in close collaboration with customers. HydroCord will therefore be relevant for current and future needs, and new functionality will be available for all installations.

As of March 2022, HydroCord is installed at:

  • Statkraft
  • Sira Kvina power company
  • Skagerak Kraft
  • Hydro 

See hydrocord.no for more information.

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Realtime Hydraulic Efficiency Measurement

FDB offers continuous efficiency measurements at hydropower plants, RT Eta. Most power plants usually have a warranty measurement after start-up, but then it can take years before the efficiency is measured again. Having a real-time measurement of efficiency is beneficial for several reasons (Ruud, 2017):

  1. The measurement provides input for optimal replacement of turbine components
  2. Production optimization
  3. Pricing of power products
  4. Grading of optimal power plant operation

It is especially for point 3, pricing of power products, that access to instantaneous data is essential. The other points require high accuracy and comparable measurements over time, which are also obtained by a continuous efficiency measurement.

FDB delivers systems for continuous efficiency and water flow measurements based on differential pressure method and direct acoustic measurement method. Both methods are calibrated with a conventional thermodynamic efficiency measurement. FDB's system also informs whether sensor-data is of such quality that composite efficiency will be approved in accordance with standards for efficiency measurements.

FDB assists with instrumentation, cabling, calibration and maintenance of systems and sensors, and facilitates data and results for transport to the operations center or desired destination, using several standard protocols and solutions


Einar Ruud, Master's thesis NTNU 2017: Decision support with continuous efficiency measurement in hydropower plants.

Impact Monitor

The rock impact monitor uses many of the same principles and sensor technology behind the cavitation monitoring, but with a focus on detecting impacts between objects and surfaces inside the turbine. The impact monitor reports statistics, including the number of hits and the strength of the hits.

Real Time Cavitation Detection

The cavitation monitor uses standard sensors for measuring high-frequency vibration. The sensors are mounted on the dry side of the machine being monitored. A NI cRIO unit reads, processes and analyzes data continuously and indicates the power level of cavitation in near real time (<1min). The product provides an indication of the presence of cavitation, and a relative intensity of this. The instrument and methodology were developed as part of the PhD work of FDB's Jarle Vikør Ekanger in 2016.