The hydro governor control works as a regulator for hydroelectric turbine from references of position, speed and active power, so as to provide a stable and safe operation. It covers from Francis turbine, Kaplan, to Pelton turbine.

It carries out the turbine unit start and stop processes automatically, fully or stepped, often follow the start-up sequence and shutdown sequence.

Apart from control unit, often it includes the hydraulic servo actuation, hydraulic solenoid valve, hydraulic valve positioning, and actuator cylinder as part of the hydro governor control system.

Speed Governor – RVX CONTROL

With collaboration with Reivax, we integrate the RVX Governor Control in our offer for both new and retrofit hydro power plants.

Application including from

    • Francis turbine
    • Kaplan turbine
    • Pelton turbine

Rich Experience in Hydro Governor control 

Reivax has been supplying digital control systems to the power generation industry since 1991 and has currently has more than 1,100 systems in operation. TECG has about 15 units of governor control currently installed at this region.

Key Components of The Hydro Governor Control System 

Reliable and availability

The RVX control can easily upgrade to redundant option for demanding application, increase the reliability and availability of the system:

    • Redundant Digital controller
    • Redundant I/O module
    • On-line maintenance can be performed on controls while the redundant system is in operation.
    • Redundant speed sensor, position sensor
Main control functions:
    • Speed Control (Isochronous, Droop)
    • Active Power Control
    • Opening Control
    • Manual control;
    • Tracking function, Bumpless transfer between control modes;
    • Automatic start and stop sequence control
    • Hydraulic servo control and monitoring
    • Opening Limiters
    • Creep detector
    • Auxiliaries control (HPU, bypass valve)
    • Step test response, part of AGC
GOVErnor Control Software & Service Tools:
    • Operation;
    • Sequence Of Events (SOE);
    • Data logging;
    • Trending;
    • Meetering;
    • Simulator;
    • Parameter settings for control and limiter functions.

Sequence of events (SOE)

The Sequence of event function allows the user to record events with a 1ms sampling rate. The register holds 3,000 events. As new events are being added, the oldest ones will be overwritten.
The internal clock of the MultiCan provides the time stamp. The clock can be synchronized by satellite.


The function can record 20 users defined signals based on a user selectable trigger signal. Recording window is selectable and could be both pre- and post- trigger. The information is saved and can later be viewed in either graphic or table format.


The simulator software allows the user to verify any changes done to the system prior to downloading the parameters to the machine.

On-line parameter viewing

The software allows the user to view values of each input and output of a function block in order to validate logic changes in the software.

Upgrading/retrofitting the existing hydraulic servo system, including of distributing valve. It can integrate with existing control and new control system.

We provide the mechanical overspeed switch to protect the hydraulic turbine from overspeed damage.