IEEE 1547.6-2011

IEEE 1547.6-2011 is a technical standard for interconnecting distributed resources with electric power systems distribution secondary networks. It addresses how smaller generation or energy resources can be integrated into secondary network arrangements while maintaining acceptable electrical performance and operational coordination. For utilities, engineers, and equipment planners, this standard helps frame connection expectations where network behavior, power quality, and system protection must be considered together.

Overview of IEEE 1547.6-2011

This standard provides recommended practice guidance for connecting distributed resources to distribution secondary networks, a part of the power system where network topology and operating conditions can be more complex than on radial feeders. IEEE 1547.6-2011 is relevant when evaluating how distributed generation or similar resources interact with network service equipment, protection schemes, and local operating limits. It is intended to support careful engineering decisions rather than one-size-fits-all installation rules.

Typical use cases

IEEE 1547.6-2011 is typically used when planning or reviewing connections of distributed resources at secondary network locations in urban or dense load areas. It may apply to connection studies, utility interconnection reviews, protection coordination checks, and equipment specification for systems tied to low-voltage networked distribution. The document is especially useful where engineers must account for secondary network characteristics, local fault behavior, and the operational impact of distributed generation on existing electric power systems.

Why it matters

For projects involving network interconnections, IEEE 1547.6-2011 helps reduce uncertainty in design, procurement, and approval processes. It supports more consistent evaluation of technical compatibility, which can improve safety, limit operational disruption, and lower the risk of misapplied equipment settings or connection methods. In practice, using the standard can help align stakeholders on acceptable interconnection practices and provide a clearer basis for review, testing, and compliance decisions.

• Distributed resource interconnection guidance
• Distribution secondary network applications
• Protection and operating coordination
• Connection review and specification support
• Technical practice for utility-facing projects