30.01, Standard for High Voltage Direct
Current Circuit-breakers Above 3200 Vdc
§ IEEE 400. can be
seen, HVDC standards can help support the
design, development and integration MVDC
components such converters, insulation and
cables. can be
seen, MVAC standards can assist layout and
interfacing issues but are not suitable for MVDC
protection, grounding, switching and dynamic DC
topologies.5 DC
§ insulators
§ 36A insulated bushings
§ surge protective devices
§ 37A low-voltage surge protective devices
§ instrument transformers
§ information exchange for power systems
§ protection against electrical shock
§ short-circuit currents
§ lightning protection
§ electromechanical and solid-state relays
§ measuring relays, protection equipment
and protection functions
§ insulation co-ordination and system
engineering high voltage electrical power
installations
§ 115 standardization the field HVDC
transmission technology
§ 121A low-voltage switchgear and control
gear
§ 121B low-voltage switchgear and control
gear assemblies
§ 127 low-voltage auxiliary power systems
for electric power plants and substations
§ SyC LVDC low voltage direct current and low
voltage direct current for electricity access
Table 7-1 looks how existing IEC MVAC
standards could extended MVDC grid
operations and technology issues.5-2021, Guide for Field Testing DC
Shielded Power Cable Systems Rated and
Above with High Direct Current test Voltages
§ IEEE PC37.5 kV) DC
Transformers
§ IEEE P2984, Guide for Application Direct
Current (DC) Network Topology Protection in
DC Distribution Grids
§ IEEE PC37.
Outside the IEC, other standardization-related
work relevant MVDC power systems includes:
§ IEEE P2974, Guide for System Commissioning
of Medium and Low (750 ±50 kV) Voltage
Direct Current Distribution Network
§ IEEE P2892, Recommended Practice for
Medium Voltage (1.7, Standards Requirements
for High-Voltage Air Switches Rated Above
1 000 Vdc
§ China National Standard GB/T 38328-2019,
Common specifications high voltage direct
current circuit-breakers for high voltage direct
current transmission using voltage sourced
converters (VSC-HVDC)
§ China National Standard NB/T 42107-2017,
High voltage circuit-breaker
.61
Standardization for MVDC grids
§ 22E stabilized power supplies
§ 22F power electronics for electrical trans-
mission and distribution systems
§ 22H uninterruptible power systems (UPS)
§ 23B plugs, socket-outlets and switches
§ 23E circuit-breakers and similar equipment
for household use
§ 23H plugs, socket-outlets and couplers
for industrial and similar applications, and for
electric vehicles
§ fuses
§ 32B fuses for voltages not exceeding
1.
Table 7-2 explores how existing IEC HVDC
standards could extended MVDC grid
operations and technology issues. But they have not yet addressed the unique
aspects MVDC system operations, particularly
around topology, protection, and integration with
AC networks and distributed energy resources
