DEIF GPU/2/GS Genset Parallel Unit

The DEIF GPU/2/GS (Genset Parallel Unit) is an advanced, compact controller engineered to manage the synchronization and parallel operation of generator sets. As a key component in modern power management systems, it automates the complex tasks of matching voltage, frequency, and phase, and subsequently manages active and reactive load sharing.

Functional Capabilities

This unit integrates both speed (governor) and voltage (AVR) control loops. During synchronization, the GPU/2/GS continuously monitors the busbar and incoming generator, issuing precise raise/lower pulses to the governor and AVR to match the generator's output to the live bus. Once synchronized, it closes the breaker and transitions to load sharing mode. The unit supports both droop and isochronous load sharing configurations, enabling stable parallel operation with multiple gensets. It features a user-friendly interface with LEDs for status indication and potentiometers for adjustments.

Technical Specifications and Integration

The GPU/2/GS operates from a wide DC supply range, making it suitable for various control panels. It accepts inputs from voltage transformers (VTs) and current transformers (CTs) to accurately measure generator and busbar parameters. The controller outputs are typically relay or transistor outputs for governing and AVR control. Its compact design allows for easy mounting within switchgear. Communication options, though basic in this model, can interface with higher-level power management systems for start/stop commands and load demand signals.

Primary Application Areas

This DEIF controller is extensively used in marine power systems (ships and offshore platforms) where reliable parallel operation of gensets is critical for safety and efficiency. It is also found in industrial standby power plants, peak-shaving installations, and small-scale utility paralleling applications. The GPU/2/GS is particularly suited for systems requiring robust, straightforward synchronization without the complexity of full-featured power management computers.

Advantages of Using GPU/2/GS

By automating the synchronization process, the GPU/2/GS eliminates the risk of operator error and blackouts during breaker closure. Its reliable load sharing function ensures that no single genset is overloaded, optimizing fuel efficiency and engine life. The unit's rugged construction and adherence to marine and industrial standards guarantee long-term performance in harsh environments. For system integrators, its simplicity and proven reliability reduce commissioning time and overall project costs.