Grid Interconnection Systems™
Encorp offers a complete solutions for a variety of applications, including standby/critical power, cogeneration and peak shaving. All systems feature the Encorp Generator Gold Box™.
 
 

The Gold Box™ combines traditional control modules, protective relays and network communications capabilities into a single, microprocessor-based "Gold Box™." This integrated, solid-state component dramatically reduces engineering and assembly time for paralleling systems applications, allowing production lead times that are significantly less than the industry standard.

Grid Interconnection Systems™ Features

  • 800-5000 amp circuit breaker, low and medium voltage
  • Parallels one genset with the utility in base-load, peak-shaving, import/export or zero-power-transfer modes
  • APS units combine to operate multiple gensets in parallel with the utility
  • Automatically cycles the engine through the start, warm-up, load,unload, cool-down and stop sequences
  • Constantly monitors the engine and sends alarms via pager and email — automatically shuts down the engine if necessary
  • Complete set of protective relays
  • Automatically synchronizes with the utility
  • Supports both Modbus® and LONWORKS® communication protocols


Gold Box™ Features

  • Embedded software provides kW and VAR load sharing, VAR and power factor control, base-load control, kW load-sharing and power transfer control with soft loading and unloading, a true RMS real power sensor, protective relays, harmonics meter and PLC logic — all in one box.
  • Remote access and control using Encorp’s Virtual Maintenance Monitor™ and Microgrid Secure™ programs


Description of Operation
Encorp Grid Interconnection Systems™ are designed to be used as a peak-shaving control system that allows the generator to operate only when the utility is available. Encorp Grid Interconnection Systems™ include an integrated control, display and circuit breaker panel. The individual generator can synchronize individually on and off to the power source in a soft transition mode, supplementing utility power to perform a peak-shaving operation.

Remote Dispatch
Encorp Grid Interconnection Systems™ may command the generator to start by receiving a signal from the Encorp Virtual Maintenance Monitor™ (VMM) software located off site. Once the signal is received, Encorp Grid Interconnection Systems™ automatically starts the generator, bring it to rated speed (50/60 Hz), synchronize it to the utility and then soft-load the generator to a predetermined base-load set point. The generator will remain paralleled to the utility until a signal is received to end the peak-shaving operation. When the remote signal from the VMM is received to stop the generator, the Grid Interconnection Systems™ will soft-unload the generator, open the generator breaker, and cool down the engine for a set time period before shutting off.

Manual Start
The generator may be started manually while standing next to the generator. This manual operation may be initiated by placing the switch on the front panel into the “RUN” position and pushing the “START” button on the vacuum florescent display/keypad. This will start the generator, synchronize it to the utility, close the generator breaker, soft-load the generator to a predetermined base-load point and remain parallel with the utility. When the switch on the front panel is returned to the “OFF” position, the Grid Interconnection Systems™ will soft-unload the generator, open the generator breaker, cool down and shut off the generator.

Starting on Energy Demand
At a selected start time and/or set demand level, the Grid Interconnection Systems™ automatically starts the generator, synchronize it to the utility, close the generator breaker, soft-load it to a predetermined base-load set point and remain parallel with the utility. At the selected shut-down time and/or minimum demand level, the Grid Interconnection Systems™ will automatically soft-unload the generator, open the generator breaker, cool down and shut off the engine.

 

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