Why is a Bess project under development in the Baltics?

Hence, several large-scale BESS projects are under development in the Baltics to ensure power system reserve adequacy , including an 80 MW/160 MWh BESS to be owned and operated by the Latvian TSO for up to ~3–5 years following a regulatory derogation .

How much power does Bess use?

We can notice that the vast majority of transactions have a small volume (≤±4 MW). Moreover, the largest actual BESS power used for ID market is 23.75 MW, which is far from the theoretically available 40 MW limit.

How do you calculate the energy available in a Bess?

Once the worst-case energy has been estimated, we move on to calculate the energy available in the BESS for up- and down-regulation, respectively, which depends on the current energy content in the reservoir, its storage capacity and charge/discharge efficiency: (5) E av. UP = SOC − SOC min ⋅ η disch, (6) E av. DOWN = SOC − SOC max / η ch.

What is Bess SoC restoration?

The study is motivated by the developments and harmonisation of the regulatory framework of European balancing markets and the rapidly increasing role of BESS in power system regulation. The proposed strategy involves BESS SOC restoration through scheduled transactions in the intraday market.

What are the technical parameters of a Bess?

We assume a BESS with the following technical parameters 17: rated active power of 80 MW, rated energy capacity of 160 MWh, round-trip efficiency of 0.9025, self-discharge losses of 0.08 % per day, min/max SOC limit 10 % and 90 %, and initial SOC equal to 50 %.

How many MW of FCR capacity does a Bess provide?

Parameters are based on two BESS purchased by the Latvian TSO (20 MW / 40 MWh and 60 MW / 120 MWh) combined into a single equivalent unit. In this specific scenario, during reserve mode, the BESS provides 0 MW of FCR capacity because the short-term frequency deviation is 0 Hz due to the assumed continuous deviation of +0.2 Hz.