IEEE P1547.1/D9.9, Jan 2020

IEEE P1547.1/D9.9, Jan 2020 is an inactive IEEE draft standard focused on conformance test procedures for equipment that interconnects distributed energy resources with electric power systems and related interfaces. It addresses how interconnection equipment is evaluated so that performance can be checked against expected requirements in a controlled and repeatable way. For engineers, test labs, and procurement teams, this technical document helps define how interoperability and compliance are assessed for grid-connected DER interfaces.

About IEEE P1547.1/D9.9, Jan 2020

IEEE P1547.1/D9.9, Jan 2020 provides draft guidance for conformance testing tied to distributed energy resource interconnection. In practical terms, it supports verification of equipment behavior at the point where generation, storage, or other DER systems connect with electric power systems. The standard is relevant to components, circuits, devices, and systems where interface performance must be measured consistently. Because it is a draft document, it is best viewed as a technical reference for test planning, evaluation methods, and compliance-focused review.

Where is IEEE P1547.1/D9.9, Jan 2020 used?

This standard is typically used in laboratories, manufacturer test programs, and utility-facing evaluation workflows for interconnection equipment. It is especially relevant when testing controllers, interface devices, and associated hardware that connect distributed energy resources to the grid. In practice, IEEE P1547.1/D9.9, Jan 2020 may support qualification of equipment for utility acceptance, product development checks, and verification of conformance behavior before installation in power systems. It is most useful where repeatable test procedures are needed for DER interconnection interfaces.

Importance in practice

Conformance testing is important because interconnection equipment must behave predictably under defined electrical conditions. IEEE P1547.1/D9.9, Jan 2020 helps reduce ambiguity in test execution, which can improve consistency across labs, suppliers, and project teams. For projects involving grid-connected DER, a clear test procedure supports compliance review, lowers integration risk, and helps identify performance issues before deployment. It also provides a common technical basis for comparing equipment during design, procurement, and acceptance activities.

• Draft conformance test procedures
• DER interconnection equipment
• Electric power system interfaces
• Laboratory and acceptance testing
• Compliance-focused evaluation