Schematic diagram of energy storage intelligent operation and inspection system

What is energy storage technology?

Energy Storage Technology is one of the major components of renewable energy integration and decarbonization of world energy systems. It significantly benefits addressing ancillary power services, power quality stability, and power supply reliability.

What is electrical energy storage (EES)?

Electrical Energy Storage (EES) is recognized a... rechargeable battery is one of the most widely used EES technologies in industry and daily life. Fig. 7 shows the simplified operational principle of a typical BES system.

Can energy storage equipment operate in parallel with the grid?

In Section 3.1.1 of the Xcel Energy Guidelines for Interconnection of Electric Energy Storage with the Electric Power Distribution System document (Energy Storage Guidelines document), EConfiguration 1A, the energy storage equipment is not capable of operating in parallel1 with the grid.

Can an energy storage device be interconnected without an interconnection review?

The declaration allows interconnection of the energy storage device without an interconnection review if this mode is secure from change. In Energy Storage Guidelines document Section 3.2.1, Configuration 2A, the energy storage equipment is not capable of operating in parallel with the grid.

How does energy storage work?

Energy storage operates in parallel8 with the grid. Generation, if present is non-renewable. Metering is standard (non-net-metered). Energy storage and generation, if present, are not allowed to export energy to the grid9. The method of achieving #4 must be fully illustrated in the oneline diagram or described below.

What is parallel operation of energy storage?

“Parallel Operation of Energy Storage” – a source operated in parallel with the grid when it is connected to the distribution grid and can supply energy to the Interconnection Customer simultaneously with the Company’s supply of energy3.