The world's largest generator of renewable clean energy

Press Office
At the heart of Itaipu: the velocity controller
Font Size
30/03/2009

Attentive readers will remember the velocity controller system maintenance - the inert levers of the servomechanisms, the intermediary bearings reviewed one by one, the oil change. In order to operate these powerful levers, along with this whole set, a brain is necessary.  And that was also inspected at the U07 department.   

Attentive readers will remember the velocity controller system maintenance - the inert levers of the servomechanisms, the intermediary bearings reviewed one by one, the oil change. In order to operate these powerful levers, along with this whole set, a brain is necessary.  And that was also inspected at the U07 department.

 

 

 

 

The electronic velocity regulator or ‘brain’, a set of electronic modules and circuits that send electrical information to operate the servomechanisms,  is connected to the transmission system. 

 

In accordance with the systems needs, it adjusts more or less load to the machine: servomechanisms in motion, blades open and close, more or less water in the turbine and that is how it goes.

 

To carry out regulator maintenance, the team from the Electronic Maintenance Division (SMME.DT) went into action. They inspected all of the control electronics, adjusting modules and devices. “Preventative maintenance helps avoid machine shutdown due to failures”, said specialized technician Emílio Carlos Ruiz, from the Electronic Maintenance Division (SMME.DT). “For this reason Itaipu breaks all the generator units’ availability records."

 

After the adjustments, the technicians tested the whole regulator. Software playing the part of the electric system and the generating unit simulated different frequency and power information in order to confirm the regulator’s responses.

 

Machine control

 

The electronic velocity regulator is located on elevation 108, in the headquarters of the machine department. In fact, that is where the entire generator control unit is located, from the grounding to the connection of the gas insulated substation (GIS).  From the machine’s start up to its shut down for maintenance.

 

The so called unit protection system underwent a complete review of its electronic circuits.  Software simulated all the machine’s failure parameters in order to check the operation of each relay. When the machine is sent back to Operation, it should be in perfect working order.