Booster control is used to maintain a constant pressure at the outlet by automatically varying the speed of the pumps. Altivar Process ATV600 drives allow the pumps to have an optimised consumption of power whilst time providing optimal monitoring features.

Booster Control is used in several pumping processes. A typical application is water and waste water, where booster control can be used depending of the booster control mode:

Pump architectures

Single pump architecture can be found on simple installations. It provides basic control of the complete installation with a single drive. The Altivar Process ATV600 drive can control up to 5 direct on line (or Starter controlled) pumps in addition to the variable speed one. Several multi-pump system architectures exist in process industry. Altivar Process ATV600 drives can be used in several architectures:

Multi-pump

This architecture can be found in advanced installations. It provides advanced control of the complete installation including the variable speed drives. The Master drive can control up to 5 Slaves through Multi-Drive Link technology. In Multiple Drives architecture, sensors are wired to the Master.

Multiple Drives & Service continuity

This architecture can be found in advanced installations where service continuity is needed. It provides advanced control of the complete installation including the variable speed drives. The drives on the installation can act as Master, Master or Slave, or Slave only through Multi-Drive Link technology. In Multiple Drives & Service Continuity, sensors are wired to the Master and to the Secondary Master.

For both multi-pump and multiple drives applications, Altivar Process ATV600 drives are linked together through a Dual Port Ethernet fieldbus module plugged on each Altivar Process ATV600.

Booster Control Overview

The aim of the booster control function is to maintain the desired pressure or flow at the outlet of the pumps according to the demand. This can be either by managing the velocity of the variable speed pump connected to the drive, or by staging/destaging the variable speed pumps or auxiliary fixed speed pumps.

The type of control allows selecting which kind of process is used for the feedback, set-point and other related values to control the PID. For example:

– Pressure: The system is based on pressure unit. This type of control is used for pressure regulation applications

– Flow: The system is based on flow unit. This type of control is used for flow regulation applications

Speed control

Traditional Control Mode

This speed control mode is available for Single Drive architecture. There is only one variable speed pump. The variable speed is started first. Other pumps are staged/destaged one by one running at fixed speed, according to the need.

Distributed Speed Control Mode

This speed control mode is available for Multiple Drives architecture. The pumps will be staged and de-staged one by one. The last staged pumps run at variable speed and other pumps run at fixed speed.

Advanced Speed Control Mode

This speed control mode is available for Multiple Drives architecture. The pumps are staged and destaged one by one. The pumps run at the same speed.

Go here for Schneider ATV600 Booster Control application notes

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