Custom Manufactured Expandable Active Harmonic Filter for Waste Water Treatment Plant

The plant's pumps, blowers, and variable speed drives were generating significant harmonic distortion, posing a risk to the reliability of equipment and control systems that operate around the clock. As essential community infrastructure, any unplanned downtime has direct public health consequences - making a robust, well-integrated solution essential. The project presented three key requirements beyond standard AHF supply and installation:

1. System Integration & Remote Monitoring: The AHF needed to integrate with the plant's local network and existing monitoring system, providing remote visibility of power quality performance without requiring manual on-site checks. This was a non-negotiable requirement for a facility of this nature.

2. Generator Backup Protection: Active Harmonic Filters must not run on generator power. If the site switched to backup generation (a real possibility at a 24/7 critical infrastructure site) the AHF needed to automatically shut down via a remote stop signal to protect both the unit and the generator. This safety interlock was a critical design requirement.

3. Custom Manufacture, Firmware & Future Expansion: An off-the-shelf active harmonic filter was not suitable. The AHF needed to be custom manufactured to a specific rating and configuration, with firmware customised by Quality Energy to meet the specific operational requirements of the site - including the local network integration and generator protection logic. The unit also needed to be designed to be expandable from 400A to 500A to accommodate future load growth without requiring a full replacement.