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EMS

Energy Management System

Categoria: Energy Storage
  • Descrizione

HARDWARE

Elpower EMS consists of 2 main parts:

  1. Dedicated hardware with embedded watt-meters, digital and analog I/O, RS-485 communication interface, RTC
  2. Plant monitoring software running on a Windows based embedded PC

The plant management logics (priority of power sources, timings, ..) are implemented in the firmware of the EMS board and can be parameterized via software.
The dedicated hardware allows to control external sources (e.g. genset) via I/O and/or communication interface like Modbus and to have 2 three-phase measurement points (for example loads and power supply) or 6 single-phase points.

 

LOGICAL FUNCTIONS

When the system operates in automatic mode (controlled by EMS), 3 main operating modes can be identified

  1. Grid following with battery charging via renewable sources
    The PCS follows the grid or the grid formed by external sources (e.g. Gensets) on the AC side and uses all the energy provided by the renewable sources to charge the batteries.
  2. Grid following with battery charging via external sources
    When a scheduled grid forming timeslot is required and batteries are not charged enough, the EMS informs the PCS to use the grid or the external power sources (genset) to charge the batteries.
  3. Grid forming
    When the battery is charged, the EMS informs the PCS to use storage and renewable sources to form the AC grid and supply the plant loads, the EMS turns off the gensets.
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