Automatic Voltage Regulator (AVR)

 

Wiith our partnering with Reivax, we are proud to offer the state-of-art excitation system for both new and retrofit market.

Reivax Excitation (AVR) - RTX Energy

Reivax has been supplying excitation systems to the power generation industry for 25 years and has currently more than 1,100 systems in operation. Replacements include GE Alterex / Althyrex / Amplidyne, Westinghouse WTA / WMA / MGR, Allis Chalmers Regulex, etc.

The RTX Power offers state-of-art equipment for both new and retrofit hydro, coal, nuclear or natural gas fired power plants.

The RTX Power is also compatible with all major generator OEMs, such as, GE, Westinghouse, Siemens, ABB, Alstom, Mitsubishi, Hitachi, Allis Chalmers etc.

The hardware and software of the system can be customized to meet specific functionality and can be scaled up to an output of 10,000 Adc.

 

Experience of Reivax

Reivax has been supplying excitation systems to the power generation industry for 25 years and has currently more than 1,100 systems in operation.

Replacements include GE Alterex / Althyrex / Amplidyne, Westinghouse WTA / WMA / MGR, Allis Chalmers Regulex, and etc.

 
Hardware

Control Hardware, the basic system offers including:

  • Voltage regulator (M28) with an Automatic and a Manual channel;
  • An air-cooled IGBT transistor or six (6) pulse thyristor bridge and a firing circuit (DPCan).
  • A user friendly graphical HMI touch screen (PAN);

 

Reliable and availability

  • Redundancy options at all areas
  • Redundant Voltage regulator
  • Redundant IGBT/thyristor bridges 

 

 

Excitation Output 

 

Control & Protection Functionalities

  •  Automatic voltage regulation;
  •  Automatic var regulation;
  •  Automatic power factor regulation;
  •  Field current regulation;
  •  Differentiated settings for no load and loaded conditions;
  •  Time delay compensation of the brushless;
  •  Reactive compensation (kcr);
  •  Over excitation limiter – OEL;
  •  Under excitation limiter - UEL;
  •  Stator current limiter;
  •  Volts/hertz limiter;
  •  Softstart with adjustable rate;
  •  PSS (power system stabilizer) 2A IEEE model;
  •  Fast synchronization (using a 4 – 20 mA input);
  •  Limiters’s correction based on generator cold air temperature (PT100);

Commands

  •  Excitation command;
  •  De-excitation command;
  •  Increase internal reference command;
  •  Decrease internal reference command;
  •  Control selection – automatic;
  •  Control selection – manual;

Supervisions and failures

  •  Supervision of the voltage transduction;
  •  Supervision of the statoric current transduction;
  •  Supervision of the field current transduction;
  •  Excessive excitation time;
  •  Failure in the opening command of the field breaker;
  •  Failure in the shutdown command of the field breaker;
  •  Supervision of the driver´s temperature;
  • Supervision of the converter´s fuses;
  • Watchdog;