In general, the MVDC power industry suffers from
a lack unified standards for fault detection and
isolation, insulation guidelines, and communication
protocols related protection coordination.
The IEC’s current work related MVDC has
focused voltage and insulation levels.
§ For LVDC voltage levels, IEC published
IEC 63282:2024.5 DC
§ 17A switching devices
§ 17C assemblies
§ design, testing and end-recommen-
dations for electrical power and control cables
§ systems, equipment and their compo-
nents for electronic power conversion and
electronic power switching
Section 7
Standardization for MVDC grids
.
Other IEC committees responsible for existing
standards relevant MVDC grid operations or
technology are listed below, with further details on
the actual standards provided Annex Items in
bold indicate committee standardization effort
that currently addressing issues particularly
relevant grids technology. Addressing these issues will require
both updating existing standards and creating new
MVDC-specific standards.
DC insulation levels
§ IEC JWG (joint working group
with IEC 115) working technical
specification (TS) HVDC insulation
coordination IEC 60071 series. standards fail keep with the
massive changes occurring the power system,
there risk system performance and reliability. Basic
standards defining nomenclature and addressing
voltage levels and other key issues associated
with MVDC power systems and technology are
also needed.1 Existing standards
Many existing standards and standardization
efforts are relevant the use MVDC technology
in the power system, although few explicitly focus
on MVDC grid issues.
§ IEC also planning establish a
horizontal standard (IS) address voltage
levels inside new edition IEC 60038.
In parallel, 2023 IEC Advisory Committee on
Electricity Transmission and Distribution (ACTAD)
initiated the development guide related
to applications, IEC Guide 111-2, Electric
equipment for high voltage substations Common
recommendations for product and system
standards Part (direct current).
7.
DC voltage levels
§ For HVDC and MVDC voltage levels, based
on the CIGRE TB684, IEC 115 published
IEC 63471:2023.60
Given the challenges and technical changes
described throughout this paper, standards will
play key role the uptake and operation of
MVDC grids.
§ systems aspects electricity supply,
including terminology, key definitions, and
characteristics power system
§ grid integration renewable energy
generation
§ decentralized electrical energy systems
§ switchgear and control gear above
1
