This part of IEC 61850 describes the functions for power converter-based distributed energy resources (DER) systems, focused on DC-to-AC and AC-to-AC conversions and including photovoltaic systems (PV), battery storage systems, electric vehicle (EV) charging systems, and any other DER systems with a controllable power converter. It defines the IEC 61850information models to be used in the exchange of information between these power converter-based DER systems and the utilities, energy service providers (ESPs), or other entities which are tasked with managing the volt, var, and watt capabilities of these power converter-based systems.

These power converter-based DER systems can range from very small grid-connected systems at residential customer sites, to medium -sized systems configured as microgrids on campuses or communities, to very large systems in utility -operated power plants, and to many other configurations an d ownership models. They may or may not combine different types of DER systems behind the power converter, such as an power converter-based DER system and a battery that are connected at the DC level.

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The namespace “ IEC 61850‑90‑7” is considered as “ transitional” since the models are expected to be included in IEC 61850‑7‑ 420. Potential extensions/modifications may happen if/when the models are moved to International Standard status.

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