Type of energy stored:

Electrochemical

Nominal capacity (kWh):

179.2

Nominal power (kVA):

240

Year of installation:

2015

Response time:

Less than 1 second

Self-discharge (%/month):

1-2

Efficiency (%):

85 – 95

Grid Voltage (V):

400

 

ESS communication system:

A dSPACE-based real-time controller guarantees the access to the measurements and allows the control of the ESS. The dSPACE box can be accessed remotely through a Remote Desktop Connection (via LAN)

HMI:

Based on the “ControlDesk” software installed in the dSPACE box

Overview of the AC Grid interface:

The system is made of 3136 Li-ion cells that are arranged into two pairs each connected to a 120kVA inverter. The output of the two inverters is connected to an isolation transformer that is connected with the power system of the Sackville Building. The system is available to contribute to the ancillary services of the low voltage distribution grid.

 

ANCILLARY SERVICES (<30s response time for voltage control, frequency response):

Yes, full charge to full discharge in at least <0.7s

RESERVE (>30s response, at least 30 min duration):

Yes, can source or sink 240kW for 30 minutes, depending on initial state-of-charge

INTRA-DAY PEAK SHIFTING (balancing demand/supply of electrical and thermal within day):

Yes, can deliver 180 kWh of energy at ±240 kVA

INTER-DAY LEVELLING (balancing over days, especially considering low wind events):

Yes, can deliver 180 kWh of energy at ±240 kVA

SEASONAL ELECTRICAL PEAK SHIFTING (storing electrical energy in summer, discharging in winter):

Yes, capable of providing Triad Avoidance services

SEASONAL THERMAL PEAK SHIFTING (storing hot/cold thermal energy between seasons):

No

BLACK START:

Yes

UNINTERRUPTABLE POWER SUPPLY:

Yes, can store 180 kWh of energy at negligible self-discharge rate if system is in energy saving mode (batteries disconnected and BMS powered off).

CUSTOMER BALANCING:

?

 

Contact Person: Dr. Rebecca Todd

Data from: Dr. Rebecca Todd