GEA Orengine

At a 660 MW hydroelectric power station near Medellín, Colombia, environmental regulations require a Minimum Vital Flow (MVF) — the minimum volume of water that must pass downstream of any dam to preserve ecological and morphological integrity — to be maintained continuously. This mandatory flow was being discharged through a conventional energy dissipation valve, releasing 2.5 MW of hydraulic energy unused into the river. The owner engaged GEA Orengine, an Italian energy systems integrator specialising in mini hydroelectric plants, to recover that capacity. The core challenge was installing a parallel hydraulic turbine without disrupting the main 660 MW facility or introducing the protocol conversion complexity common in multi-vendor control environments.

GEA Orengine, with Rockwell Automation as sole automation supplier, deployed a unified Integrated Architecture built around four Allen-Bradley CompactLogix programmable automation controllers (PACs) networked over EtherNet/IP and interfaced with the main plant's ControlLogix PACs via the IEC 60870-5-104 power-station transmission protocol. Fiber optic cabling was chosen as the physical medium to guard against electromagnetic interference inside the underground turbine chamber, accessible only through a narrow tunnel. An Allen-Bradley PowerMonitor 1000 handled energy load monitoring, while Allen-Bradley XM series dynamic measurement modules captured real-time shaft and casing vibration data, feeding into Emonitor Condition Monitoring Software on a dedicated industrial Panel PC. The single-supplier approach eliminated every protocol conversion and data translation layer between the new turbine and existing dam control systems. On-site software development and commissioning using the RSLogix 5000 environment was completed in three weeks.

The project delivered a 2.5 MW increase in net generating capacity — sufficient electricity to supply approximately 1,000 apartments or 5,000 residents, the equivalent of an entire village. Additional outcomes:

• 2.5 MW of Minimum Vital Flow energy converted from waste to productive generation
• 100% sustainable output with no additional water consumption or environmental footprint
• Projected 3-year payback under full operational exploitation of the MVF resource
• 3-week commissioning window achieved on-site, materially reducing project labour costs
• Condition-based predictive maintenance programme established through integrated vibration monitoring, lowering unplanned downtime risk
• Zero protocol conversion interfaces required across the unified control environment

• Mandatory Minimum Vital Flow requirements at any dam represent a recoverable energy asset — a parallel turbine installation can convert a regulatory obligation into measurable generation capacity.
• A single-supplier automation architecture removes protocol conversion complexity and compresses commissioning timelines; GEA Orengine completed software development in three weeks as a direct result.
• Integrating vibration monitoring within the primary control platform — rather than operating a separate condition monitoring system — enables predictive maintenance without additional integration overhead.
• The mini hydroelectric model (typically 50 kW–10 MW) is highly replicable across existing hydroelectric infrastructure and can recover costs within three years when MVF volumes are sufficient.