Dynamic reactive power compensators

Main features

ITB´s Dynamic reactive power compensators models CAQ-1, with control model CTX-1, are an equipment capable of measuring the reactive power consumed in the phase in which it is installed and providing the reactive power required in a gradual way, from zero to maximum capacitive and from zero to the maximum inductive. They can be used in single-phase or three-phase systems, in substations, along the distribution lines or at the entrance of a specific consumer.

Powers: 100, 200 & 300 Kvar

Classes of Voltage: 15, 24,2 & 36,2 kV

Frequency: 50 or 60 Hz

It is designed to implement power factor correction in distribution and / or voltage correction systems and implements the correction by varying the voltage across a reactive element, capacitor, inductor or capacitor and inductor, using a single-phase coupling transformer with 17 switched under the load of the reactive element providing 17 different voltage levels in 16 equal steps of voltage applying 17 different levels of reactive load to the network which can vary from 0 to the reactive, inductive or capacitive nominal power of the equipment.

Properly installed voltage sensors and current sensors provide sufficient data to allow the CTB-1, ITB´s digital control, to set the required correction and its interface with the tap-changer allows it to be switched and monitored to obtain the requested correction.

Measurements and analyzes of the line values ​​are made and shown by an electronic control device model CTX-1, equipped with microcontroller, which, operating in automatic mode, commands the switch in order to adjust the reactive power of the compensator to the demand measured in the Phase in which it is installed considering the real-time monitoring of the network and the compensation parameters programmed in it and also accumulates functions of register and position indicator of the switch.

Key Features

  • Compared to traditional methods of reactive compensation in electrical systems, Dynamic Reactive Power Compensators stand out because they offer:
  • Flexibility and suitability to the system
  • Compensation per phase, suitable even for unbalanced systems
  • Measurement of voltage, current and power factor included and per phase
  • Over current protection on reactive element
  • Overvoltage protection on the reactive element
  • Regulation by power factor
  • Voltage regulation
  • Automatic or manual operation
  • Detection and operation by reverse flow of power
  • Network Information Log
  • Gradual connection of the reactive elements to the system
  • 17 different levels of system voltage and power in short times
  • Capacitive or inductive compensation
  • Installation at any point in the electrical system
  • Coordination with other reactive buffer elements
  • Possibility of adjustment and remote control with SCADA – DNP3
  • Placement and withdrawal without interruption of supply

Key Earnings

  • Investment postponement
  • Reduction of upstream current levels with consequent reduction in losses
  • Low maintenance frequency in relation to automatic and fixed seats.
  • Lifespan of reactive elements
  • Free switching of transients or disturbances in the electrical system, contributing to the improvement of electric power quality
  • Possibility of harmonic attenuation

Technical Standards

ABNT NBR 11809
ANSI IEEE C57.15
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