| » Installed Systems |
The DEMOCRAT project demonstrator is presently installed in a provisional site within the industrial facilities of Efacec, in Maia, Portugal. As of August 2019, the Battery Energy Storage System (BESS) is already installed, with a 3-phase connection to the LV grid. The 15 kV grid connection will be implemented at the final demonstrator site, yet under construction.
The solution comprises two containerised components: the Battery Block housing the battery system and the PCS Block housing the power conversion system.
The Battery Block is presently equipped with Lithium-ion (Li+) batteries from
Pylontech, with an installed capacity of 2x109 kWh. The Battery Block can accommodate up to 9x109 kWh of the same batteries, although other Li+ technologies and different batteries could be integrated as well.
The PCS Block is equipped with a 250 kVA battery inverter. It is equipped with two transformers, providing grid interface at LV and MV level, respectively 400 V and 15 kV. Moreover, the PCS Block is also equipped with MV switchgear and LV switchboards, besides the control cabinet.
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| View of the Battery Block and PCS Block |
View of the Battery Block |
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| Another perspective of Battery Block and PCS Block |
Detail of the PCS Block |
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| The PCS Block houses three main compartments: |
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- MV cells for grid interconnection,
comprising: |
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- Circuit breaker cell, equipped with protection
relay |
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- Voltage transformer cell for voltage signal
acquisition, equipped with a MV energy metering device |
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- Switch-disconnector cell, equipped with a quality
measurement device (qualimeter) |
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- Step-up (MV/LV) and decoupling (LV/LV)
transformers |
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- LV switchboards, UPS, battery inverter
and control cabinet |
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| The following components belong to the PCS Block, which refer to the MV cells and the step-up transformer. |
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15 kV switchgear equipment
of the PCS Block
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15 kV / 400 V step-up transformer
of the PCS Block |
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| The following components belong to the PCS Block, which refer to the battery inverter, the UPS and control cabinet, as well as to an AC switchboard.
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| 250 kVA battery inverter |
UPS and control cabinet |
AC switchboard |
(detail) |
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| The Battery Block houses the battery system within a same compartment. The major components are: |
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- Battery racks,
comprising: |
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- Master Battery Management System (MBMS) and LAN switch, |
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- Power DC switchboard, |
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- Air conditioning, |
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- Fire detection and fire extinction, |
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| The following components belong to the Battery Block, which refer to the battery racks and the DC switchboard. |
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| 218 kWh Li+ batteries |
DC switchboard |
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