GB/Z 151-2026Fire prevention measures on converters for high-voltage direct current (HVDC) systems, static var compensators (SVC) and flexible AC transmission systems(FACTS) and their valve halls (English PDF)

Foreword

This document is a report-type guidance technical document.

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is modified to adopt IEC TR62757:2015 "High Voltage Direct Current (HVDC) Systems, Static Var Compensators (SVCs) and Flexible AC Transmission Systems".

The document type "Fire Protection Measures for Converters and Valve Halls of Power Transmission Systems (FACTS)" has been changed from an IEC technical report to a Chinese standard.

Guiding technical documents.

Compared with IEC TR62757:2015, this document has undergone the following structural adjustments.

---3.3~3.4 correspond to 3.12~3.13 of IEC TR62757:2015;

--- 3.5~3.9 correspond to 3.15~3.19 of IEC TR62757:2015;

---3.10~3.16 correspond to 3.21~3.27 of IEC TR62757:2015;

---3.17, 3.18, 3.19, 3.20, 3.21~3.22, 3.23~3.25, 3.26~3.27, 3.28, 3.30 correspond to IEC TR62757.

---Move Chapter 4 of IEC TR62757:2015 to Appendix A, and shift the article numbers of subsequent chapters forward;

---Appendix B corresponds to Appendix A of IEC TR62757:2015.

This document differs significantly from IEC TR62757:2015.The differences are indicated in the margins of the relevant clauses.

The vertical single line (|) is marked. The specific technical differences and their reasons are as follows.

---The scope of the standard has been changed, clarifying the applicable objects and boundary conditions (see Chapter 1);

---Added normative reference documents (see Chapter 2);

---To align with my country's national conditions and avoid redundancy or ambiguity, the terms "automatic fire detector," "automatic fire extinguishing system," "combustion," and "starting fire" have been removed.

"Fire", "Charcoal", "Carbonization", "Combustion", "Exit", "Fire", "Fire Pump Connection", "Flame", "Ignition", "Evacuation Facilities", "Rapid Response Spraying" "Device", "Self-extinguishing", "Semiconductor device";

---To adapt to my country's power engineering and fire protection systems, the terms "automatic fire alarm system" and "valve hall" have been added (see 3.2 and 3.29);

---To maintain consistency with commonly used terminology in my country's power engineering and fire protection systems, the terms "fire alarm box," "alarm box," and "siren" have been changed.

Definition (see 3.6);

---Based on the domestic station layout and the risks of through-sealing, the description of the physical layout of the valve hall and related facilities has been revised, and valve hall sealing has been added.

The content (see 4.1.1);

---To align with domestic engineering terminology, "service space" has been changed to "related facilities" (see 4.1.2);

---To clarify the various construction forms, change the heading to "Firewalls or other fire barriers," and modify the technical content accordingly (see 4.1.3.2);

---Added fire protection requirements for oil-filled equipment passing through the valve hall area (see 4.2.2.3);

---In addition to the requirement of "low flame spread and low smoke emission level", the requirement of "materials with lower heat release rate should be given priority for finishing" is added.

(See 4.2.2.5);

---To facilitate comparison with domestic regulations, the phrase "expected occupation time of the valve hall" has been removed, and "evacuation facilities" has been changed to "evacuation routes".

Evacuation routes, staircases, exits, and other evacuation signs (see 4.3);

---Using national regulations as the compliance baseline, the phrase "evacuation facilities should comply with local regulations and operational requirements" has been changed to "must comply with national fire safety regulations".

The phrase "the only expected time for most valve chambers to be occupied is during maintenance" was removed (see 4.3).

---Based on operational and maintenance practices, "gate electronic devices or monitoring electronic devices" has been changed to "gate circuits/gate circuits and monitoring circuits";

Based on domestic realities, "voltage source capacitor or stage capacitor (if applicable)" will be changed to "voltage source converter DC capacitor (if applicable)".

(For use); To adapt to diverse valve tower structures, change "interlayer support insulator" to "support insulator/suspension insulator" (see 5.2.1);

---Add "Current Transformers" to the list of "Other Valve Hall Equipment," specifying that "these devices may include those that allow online monitoring of low air pressure." The phrase "electrical contacts" should be changed to "These devices generally contain electrical contacts that allow for online monitoring of low atmospheric pressure" (see 5.3).

---Based on practical applications of fire monitoring, the statement "air sampling systems can also effectively detect overheated joints or components" and the valve have been removed.

Description of equipment in the hall that does not require fire monitoring;

---To maintain consistency throughout the text, the phrase "fire detection solutions must be able to accurately and reliably detect fires in order to intervene in a timely manner and avoid false alarms" will be repeated.

The phrase "alarm" was changed to "fire detection solutions should accurately and reliably detect fires in order to intervene in a timely manner and avoid false alarms," and "most important" was changed to "fire detection solutions should accurately and reliably detect fires in order to intervene in a timely manner and avoid false alarms." The action of "stopping the power input to the equipment" should be changed to "the most important operation is to disconnect the system power supply" (see 6.1);

---The description regarding the applicability of ultra-high voltage direct current (UHVDC) and extra-high voltage direct current (EHDC) systems for detecting valve hall fires has been deleted;

---To align with domestic fire protection product classification and naming conventions, "air sampling system" will be changed to "aspirating smoke detector" or "integrated smoke detector".

The phrase "like a camera system" was changed to "image flame detector" (see 6.2.1, 6.2.3, 6.2.7);

---The assessment of fire suppression system requirements has been adjusted, and the review conclusions regarding the layout and complexity of fire suppression systems have been revised (see 7.1);

---Descriptions of specific product brands have been removed from the hydrofluorocarbon category;

---Change the heading to "Perfluorohexanone" and modify the technical content accordingly (see 7.3.5);

---The requirement regarding electrical clearances for fire suppression has been removed;

---Change the chapter title to "Post-Disaster Ventilation Management" (see Chapter 8);

---In accordance with the provisions of 11.6.2 in GB 50229, the description of ventilation after a fire has been changed (see 8.1);

---The diagrams illustrating natural and forced ventilation on the roof have been removed;

---To highlight the implementation plan, the heading "Design Considerations" has been changed to "Mechanical Ventilation Design Considerations," and the mechanical ventilation...

The wording has been revised, removing the sections on "Overview," "Natural Ventilation," and "Design" (see 8.2).

---Change "fire alarm system" to "automatic fire alarm system" (see Chapters 9 and 10);

---The explanatory text stating "All boxes in Figure 2 may not apply to all situations" has been removed;

---Based on domestic system interfaces and device configurations, the wiring and interconnection diagram of the integrated fire detection and fire protection control system has been modified (see...).

Figure 1 in 9.2.1)

---Change "Designed as a fire alarm system for automatic tripping converters" to "Activates the automatic fire alarm system and notifies operating personnel" "Operating the tripped converter", delete the exemplary description "Using electromagnetic radiation to detect electric arcs as an early detection of fire", see 7.2.4 to 7.2.6" (see 9.2.3);

---The description of systems used to detect significant arc faults has been removed;

---Based on the actual fire protection configuration name, change "ventilation management system" to "smoke control and exhaust system" (see 9.3.1 and 10.2.2);

---Change "fireproof louvers for windows" to "fireproof roller shutters for windows" (see 9.3.3);

---The description of the fire control system's compliance with fire protection codes has been revised (see 9.4);

---The requirements for training firefighters within the station have been changed (see 10.2.3);

---Change the heading "Ventilation Management and Smoke Control System" to "Post-Disaster Ventilation System" and make corresponding changes to the technical content (see 11.2.7).

The following editorial changes have been made to this document.

---Includes errata from IEC TR62757:2015/AMD1.2019, located in the margin of the relevant clauses.

It was marked with a vertical double line (||);

---Added a note to 9.3.1;

---Based on practical applications, "dry-type capacitors typically contain polyurethane or silicone, and their filling material will not [produce harmful substances] even when exposed to air." The word "combustion" has been changed to "dry-type capacitors typically contain dielectrics such as polyurethane, silicone, or nitrogen, sulfur hexafluoride, etc., emphasizing that there is no possibility of leakage." "Leaking flammable liquid" (see A.2.3.4);

---Due to the operation of the surge arrester, ionized plasma in the arc groove may trigger a flashover (although a good design should minimize this risk).

"Minimize this situation to the greatest extent possible" should be changed to "Due to the destructive operation of the surge arrester, ionized plasma in the arc trough may..." It can trigger flashover (see A.2.7);

---Based on my country's national conditions, the examples of fire incidents have been modified and are provided as an informative Appendix B for reference.

1 Scope

This document provides information on high-voltage direct current (HVDC) systems, static var compensators (SVCs), and flexible alternating current transmission systems (FACTS).

Fire protection measures for the converter and its valve hall include valve hall layout and passageways, monitoring of valve components and other valve hall equipment, fire detection systems, and fire suppression systems.

Systems, ventilation management, fire protection and converter control systems, fire protection and maintenance, etc.

This document applies to high-voltage direct current (HVDC) systems, static var compensators (SVCs), and flexible alternating current transmission systems (FACTS).

Fire protection for converters and their valve halls; fire protection for other power electronic converters and their valve halls shall be used as a reference.

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 50016 Code for Fire Protection Design of Buildings

GB 50229 Fire Protection Design Standard for Thermal Power Plants and Substations

DL 5027 Typical Fire Protection Regulations for Electrical Equipment

3 Terms and Definitions

The following terms and definitions apply to this document.