Combined Excitation System and Governor

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What is a Combined Excitation System and Governor?

It’s a control system that combines the functions of an Excitation System and a Governor, responsible for controlling the synchronous generator’s terminal voltage and reactive power, as well as the frequency and active power of the generating unit!

This innovation emerged in 1999 in the Engineering, Research, and Development department of REIVAX,  revolutionizing the power systems forever.

 

RTVX POWER

The RTVX POWER combines the RTX POWER Excitation System with the RVX POWER Digital Governor in a single cubicle, using the same hardware platform, software and HMI.

All the functions, tools, and features available in the RVX and RTX are also present in the RTVX POWER system.

Applied to small, medium, or large generating units, this solution offers numerous technical and economic advantages.

 

ADVANTAGES

  • Increased reliability due to reduced number of  components;
  • Cost savings and reduced physical space;
  • Reduced engineering and commissioning interfaces;
  • Easy installation, commissioning, and maintenance.

ARCHITECTURE

The control hardware applied in RTX POWER and RVX POWER was designed to allow the implementation of more features without sacrificing processor load and memory capacity, thus enabling the combination of both excitation governor functions in a single control hardware: RTVX POWER.

The RTVX POWER offers significantly more redundancy options than currently available on the market. The system can be combined with the following options:

  • Redundant excitation and governor processors, each with an Automatic and Manual channel. The system performance is monitored by a watchdog on each CPU. The switching between control channels and between control modes is automatic and bumpless;
  • Redundant I/O interface, including terminal and wiring redundancy. The I/O interface can also be expanded;
  • Redundant thyristor bridges with a control interface to operate either bridge via channel 1 or channel 2;
  • Redundant fans for each thyristor bridge. Each bridge has independent conduction and temperature monitoring per thyristor;
  • Thyristor bridge maintenance tool available in the control and HMI software;
  • Allows maintenance on control modules, thyristor bridges, and the Hydraulic Unit while the redundant system is in operation;
  • Fully user-friendly touchscreen graphical HMI;
  • Each printed circuit board (PCB) is designed and manufactured to meet electromagnetic interference (EMI) requirements, as per IEC standards.

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