NABCEP Grid Interconnection

Question 1

What is the primary standard that defines technical requirements for interconnecting distributed energy resources, including solar PV systems, to the electric power system?

Accepted Answer

IEEE 1547-2018

Answer

IEEE 1547 is the nationally recognized standard governing the technical interconnection requirements for distributed energy resources such as solar PV systems.

Question 2

Anti-islanding protection in grid-tied inverters is designed to:

Accepted Answer

Shut down the inverter when grid power is lost to protect utility workers

Answer

Anti-islanding protection prevents the inverter from continuing to energize the grid during an outage, protecting utility linemen performing repairs on de-energized lines.

Question 3

The Point of Common Coupling (PCC) in a grid-tied PV system is:

Accepted Answer

The location where the PV system electrically connects to the utility distribution network

Answer

The PCC is the electrical boundary point where the customer's generation system interconnects with the utility grid, and is the reference point for interconnection requirements.

Question 4

What document must be executed between a solar system owner and the utility before a grid-tied PV system can be legally energized?

Accepted Answer

Interconnection Agreement

Answer

An Interconnection Agreement is the legally binding contract between the customer and the utility governing the terms and conditions for connecting a distributed generation system to the grid.

Question 5

What is 'unintentional islanding' in the context of grid-tied solar PV systems?

Accepted Answer

A condition where a PV system continues to energize a section of the utility grid after that section has been disconnected from the main grid

Answer

Unintentional islanding occurs when a PV system continues to power an isolated section of the grid after disconnection from the main utility, creating shock hazards for utility workers.

(NABCEP) North American Board of Certified Energy Practitioners Solar Practice Test

(NABCEP) North American Board of Certified Energy Practitioners Solar Practice Test

NABCEP Grid Interconnection