Why does Korean power system plan to provide Bess?

Due to the wide range of BESS capabilities as mentioned above, Korean power system plans to provision BESS to relieve generation curtailment and to provide FR service in the short-term applications, and to maintain frequency stability by providing FFR service in a low-inertia system for the long-term applications.

Why is South Korea implementing a Bess frequency regulation project?

South Korea is in the midst of the world’s largest BESS frequency regulation project. The target is to install 500MW by 2017. In addition to enhancing the efficiency of the grid, installing BESS capacity will reduce KEPCO’s need for readily available spinning reserve capacity.

What is GCR-Bess capacity of Korean power system?

A historical data of Korean Power System when the occurrence of under frequency event is used to depict the performance of the proposed BESS control strategy. This simulation was applied using MATLAB/Simulink. The GCR-BESS capacity is assumed to be 112 MW/56 MWh.

When is a Bess allowed to operate if a power system exceeds FDB?

As previously mentioned, the BESS is allowed to operate if the power system exceeds a certain level of frequency. Instead, if the system operation is within the range of frequency dead band (∆ fdb), the SOC of BESS will be managed to be close to the desired SOC setpoint.

What is the largest Bess system in the world?

At 24MW/9MWh, one is the largest such system installed in the world to date. A second 16MW/6MWh BESS is up and running as well, while a third 16MW/5MWh lithium titanate oxide (LTO) system was deployed last August, bringing KEPCO’s installed BESS capacity to 56MW.

Does Bess charge energy if SOC is lower than setpoint?

BESS will discharge energy when the SOC is higher than the setpoint and charge the energy when the SOC is lower than the setpoint. Since the SOC control mode is operated when system frequency is within the dead-band range, it would not interfere with the FR of the system.