The MASTER 2.0 by CRE TECHNOLOGY (France) is a power plant automation controller that combines generator synchronization, mains paralleling, and load management functions in a single integrated platform with a built-in PLC for custom logic programming. Its multi-mains architecture means a single MASTER 2.0 can manage a power plant with multiple utility grid connections — a capability typically requiring separate synchronizing relays and a supervisory PLC. The controller handles the full synchronization sequence: measuring mains and generator voltage, frequency, and phase angle; issuing speed and voltage bias commands to bring the generator into synchronism; and closing the circuit breaker at the precise zero-crossing point.

What operating modes does the MASTER 2.0 support beyond basic generator start/stop?

Four distinct paralleling modes address different site requirements. No-break changeover synchronizes the generator with the mains before transferring the load, then opens the mains breaker — eliminating the momentary power interruption of a conventional break-before-make transfer, critical for data centers and healthcare facilities. Permanent paralleling in base load mode maintains the generator at a constant kW output regardless of load variation, with the grid absorbing fluctuations — the standard configuration for cogeneration and waste-to-energy plants selling fixed power to the utility. Peak shaving mode starts and parallels the generator only when site load exceeds a programmable grid import threshold, reducing demand charges. Power factor control adjusts the generator's reactive power output to maintain a target power factor at the grid connection point when paralleling with the mains. The controller also includes Dyn11 vector group compensation, a practical necessity when the generator step-up transformer introduces a 30° phase shift between the generator and the high-voltage side measurement point.

How does the integrated PLC extend the controller's capabilities?

Beyond the pre-programmed operating modes, the MASTER 2.0 exposes internal variables — breaker status, generator running hours, load levels, alarm states — to an equation-based programming environment. This allows engineers to implement site-specific logic sequences without an external PLC: automatic generator rotation based on runtime, conditional load shedding when only one genset is available, interlocking with fire alarm or security systems, or sequencing multiple MASTER 2.0 controllers in complex multi-generator, multi-busbar architectures through CANbus inter-controller communication.