Design of emergency energy storage power supply for substation

Can a battery energy storage system be used as an emergency power supply?

This paper introduces the concept of a battery energy storage system as an emergency power supply for a separated power network, with the possibility of island operation for a power substation with one-side supply.

What is emergency power supply system (EPSS)?

Accreditation standards recommend CIs to have emergency power supply system (EPSS) in order to form a local microgrid network with backup resources (generation units/renewable resources) in case of sudden power blackouts of main grid supply.

What are battery energy storage units interfaced with power electronic inverters?

Battery energy storage units interfaced with power electronic inverters provide uninterrupted power supply (UPS) system that are an alternate solution that enhances the ease in operation and reduces the response time of EPSS for CI.

What is the s power profile of EPs B substation?

The S operating condition F-1. In this condition, the substati on supplies all energy recipients in the entire rural area and the large recipient “IP” (see Figure 2). At this time, the power S = 0. Figure 12. The S power profile of the EPS “B” substation in the failure operating condition F-1.

Why is energy storage important?

This system, with an appropriately sized energy storage capacity, allows improvement in the continuity of the power supply and increases the reliability of the separated network at a specified time during the limitation of power transmission as a result of damage or disconnection of the main power line.

What is stored-energy EPSS (sepss)?

Accreditation standards, such as NFPA 111, recommend stored-energy EPSS (SEPSS), which employ batteries/fuelcells/ultracapacitors as the main energy harvesting units along with inverter topology to assist in restoring of power to CI in the case of the grid failure . Briefly, these standards for CI recommend the following: