IEEE 2974-2025

This guide specifies the test requirements of system commissioning which are applicable to the dc (direct current) distribution network of the voltage level from 750 V to ±50 kV. The guide mainly includes the following aspects: the converter (ac/dc, dc/dc) test; the dc circuit breaker test; the test of active and passive network conversion; the test of the operation characteristics of low voltage dc islanded operation system; the test of feeder power balance system; the coordinated operation test of medium and low voltage dc system; the plug and play system test; the small power system test; the large power system test; the rated load test; the overload test; the short circuit test; and the trial operation.

The purpose of this document is to specify the condition, general requirements, test foundation, content, and methods that are applied in a medium and low voltage dc distribution network project during system commissioning.

New IEEE Standard - Active. The test requirements for system commissioning, applicable to dc (direct current) distribution networks with voltage levels from 750 V to ±50 kV, are specified in this guide. Included in the guide are the following aspects: converter [ac (alternating current)/dc, dc/dc] test; dc circuit breaker test; test of active and passive network conversion; test of the operation characteristics of low voltage dc islanded operation system; test of feeder power balance system; coordinated operation test of medium and low voltage dc system; plug and play system test; small power system test; large power system test; rated load test; overload test; short circuit test; and trial operation.