IEC 62590-2-2:2026

Overview

IEC 62590-2-2:2026 is an international standard developed by the International Electrotechnical Commission (IEC) focusing on railway applications, specifically the electronic power converters for fixed installations in DC traction systems. This standard outlines the functions and operational principles, as well as specifying requirements, interfaces, and test methods for controlled converters used within DC electric traction power supply systems. The document addresses both AC/DC and DC converters, including rectifiers, inverters, and combinations thereof, ensuring compatibility and interoperability within railway and metropolitan electrical infrastructures.

The primary aim of IEC 62590-2-2:2026 is to enable effective and controlled power flow management within DC traction networks, facilitating energy exchange with external power grids or energy storage systems. The standard is applicable to fixed installations in railway networks, metro systems, tramways, trolleybuses, automated transport systems, magnetic levitated transport systems, and emerging electric road systems.

Key Topics

Types of Controlled Converters

• AC/DC Converters:

  • Rectifiers - Convert AC power to DC for traction supply.
  • Inverters - Allow power flow from DC systems back to the AC grid, enabling energy recuperation.
  • Reversible Combinations - Enable bi-directional power exchange.

• DC Converters:

  • Used for linking the main DC traction network with other DC systems or energy storage units (such as batteries or capacitors).

• Both line-commutated and self-commutated converter technologies are addressed, supporting various operational modes and performance characteristics.

Functional and Interface Requirements

• Details requirements for:
  • System integration and coordination
  • Operational characteristics (such as voltage ranges, current ratings, and power flow controls)
  • Interfaces with 3-phase AC power networks and DC traction systems
  • Connections for energy storage integration

Test Methods and Performance

• Defines comprehensive testing protocols to verify:

  • Protection mechanisms
  • Insulation performance (as per IEC 60071-1)
  • EMC and harmonic criteria (referencing IEC 62236-5)
  • Operational sequencing and fault responses
  • Mechanical robustness and installation suitability

• Includes requirements for marking, rating plate information, and manufacturer’s data provision.

Applications

IEC 62590-2-2:2026 is essential for the design, selection, installation, and maintenance of controlled power converters across:

• Railway electrification projects (mainline and high-speed rail)
• Urban transit systems (metros, tramways, trolleybus networks)
• Automated and driverless transport frameworks
• Magnetic levitated (maglev) and electric road systems
• Integration of energy storage systems for regenerative braking and power balancing

By standardizing these converter systems, stakeholders ensure electrical safety, operational efficiency, and interoperability across complex traction power supply infrastructures.

Related Standards

Implementing IEC 62590-2-2:2026 often requires compliance with and reference to additional standards, including but not limited to:

• IEC 62590-1:2025: General requirements for electronic power converters in railway fixed installations
• IEC 60071-1: Insulation coordination - Definitions, principles, and rules
• IEC 60529: Degrees of protection by enclosures (IP code)
• IEC 62695: Traction transformers for railway fixed installations
• IEC 62236-5: Electromagnetic compatibility for fixed power supply installations
• IEC/TR 60146 series: General guidelines and application for semiconductor converter systems
• IEC 62924: Energy storage-related connection requirements

Practical Value

Adopting the IEC 62590-2-2:2026 standard offers several practical benefits:

• Enhanced Reliability: Ensures consistent power converter operation under varied and demanding traction conditions.
• Safety and Compliance: Provides clear benchmarks for electrical safety, EMC, and mechanical integration.
• Energy Efficiency: Supports bi-directional energy transfer-recuperating braking energy and facilitating energy storage.
• Future-Proofing: Address emerging requirements for advanced DC traction systems, including those involving energy storage and smart grid interconnections.

By aligning with IEC 62590-2-2:2026, operators, manufacturers, and integrators can guarantee optimal performance and interoperability in modern electrified transport networks.