Valid

GB/T 31487.2-2025Direct current deicers - Part 2: Converters (English PDF)

直流融冰装置　第2部分：换流器

Preview PDF

This is a limited preview

Buy now to download the full PDF (39 pages)

Need quotation for your management?

Get a formal quotation for GB/T 31487.2-2025 in 30 minutes.

Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2025

Implementation date

July 1, 2026

Scope

GB/T 31487.2-2025 is the English-translated version of 直流融冰装置　第2部分：换流器.

GB/T 31487.2-2025 is the Chinese standard "Direct current deicers - Part 2: Converters". Its scope clause reads: This document specifies the converter types, technical requirements, inspection rules, packaging, transportation, and storage requirements for DC de-icing devices.

This document applies to the de-icing of conductors and ground wires of 110kV and above AC transmission lines, and the de-icing of ground wires of DC transmission lines, for grid phase-change DC transmission.

The de-icing device and the modular multi-level DC de-icing device are used as references for other types of DC de-icing devices. Its clauses include terms and definitions.

Found what you need?

Document preview — GB/T 31487.2-2025

National Standard of the People's Republic of China

ICS: 29.240.99
Classification: K 46
Replacing: GB/T 31487.2-2015

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
Introduction
1.Scope
2 Normative References
3.Terms and Definitions
4.Types of converters 3.
4.1 General Rules
4.2 Grid-commutated converter
4.3 Modular Multilevel Converter
5.Technical Requirements
5.1 Normal operating conditions
5.2 Load
5.3 Overall Performance Requirements
5.4 Performance of Grid-Commutated Converters
5.5 Performance of Modular Multilevel Converters
6.Inspection Rule
6.1 General Rules
6.2 Test of thyristor valve
6.3 Experiments on Modular Multilevel Converter Valves
6.4 Testing of Bridge Arm Reactors
6.5 Water cooling equipment test
7 Packaging, Transportation and Storage
7.1 Packaging
7.2 Transportation
7.3 Storage
Appendix A (Informative) Converter Topology of DC Ice Melting Device
Appendix B (Informative) Electrical and Cooling Design of Thyristor Valves
Appendix C (Informative) Electrical and Cooling Design of Modular Multilevel Converter Valves

1 Scope

This document specifies the converter types, technical requirements, inspection rules, packaging, transportation, and storage requirements for DC de-icing devices.

The de-icing device and the modular multi-level DC de-icing device are used as references for other types of DC de-icing devices.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 1094.1-2013 Power Transformers - Part 1.General Provisions

GB/T 13384 General Technical Requirements for Packaging of Mechanical and Electrical Products

GB/T 13498 Terminology for High Voltage Direct Current Transmission

GB/T 17702 Power Electronic Capacitors

GB/T 20989 Determination of losses in high-voltage direct current converter stations

GB/T 20990.1-2020 High Voltage Direct Current Transmission Thyristor Valves - Part 1.Electrical Testing

GB/T 30425-2025 Water-cooled equipment for converter valves in high-voltage direct current transmission

GB/T 31487.1 DC De-icing Device - Part 1.System Design

GB/T 31487.3-2025 DC De-icing Devices - Part 3.Testing

GB/T 33348-2024 Electrical testing of valves in voltage source converters for high voltage direct current transmission

GB/T 34118 Terminology for Voltage Source Converters for High Voltage Direct Current Systems

GB/T 35702.1 Valve losses of voltage source converters for high voltage DC systems - Part 1.General requirements

GB/T 35702.2 Valve Losses of Voltage Source Converters for High Voltage Direct Current Systems - Part 2.Modular Multilevel Converters

3 Terms and Definitions

The terms and definitions defined in GB/T 13498, GB/T 31487.1 and GB/T 34118, as well as the following terms and definitions, apply to this document.

3.1 valve

An electrical and mechanical assembly composed of power electronic devices and auxiliary components, capable of unidirectional or bidirectional conduction, and capable of facilitating converter arms.

Function.

Note. Commonly used valves in DC de-icing devices include thyristor valves and modular multilevel converter valves.

[Source. GB/T 31487.1-2025, 3.2.1]

3.2 thyristor valve

A complete electronic switching device that uses thyristors to achieve controllable operation, normally conducting only in one direction (forward), in the converter bridge.

In the middle, it can realize the function of the converter arm.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 39 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 31487.2

Edition	Title	Revision	Status
GB/T 31487.2-2025	Direct current deicers - Part 2: Converters	current edition	Current
GB/T 31487.2-2015	Direct current deicers - Part 2: Converters	previous edition	Superseded

This page sells the current edition, GB/T 31487.2-2025. Earlier editions are listed for reference only.

How to Download GB/T 31487.2-2025

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.