NB/T 11299-2023
Design specifications for optical fiber composite submarine cable online monitoring system for offshore wind farm engineering (English Version)

Standard No.

NB/T 11299-2023

Language

Chinese, Available in English version

Release Date

2023

Published By

Professional Standard - Energy  CN  /  NB

Latest

NB/T 11299-2023

Introduction

Analysis of the core content of the standard

Monitoring subsystem	Core technology	Key indicators	Applicable scenarios
Vibration monitoring	Phase-sensitive fiber Rayleigh scattering	Positioning accuracy ≤30m (within 50km)	Anchor damage/hanging warning
Temperature monitoring	Brillouin/Raman temperature measurement principle	Temperature measurement range -40~120℃	Ampacity calculation
Burial depth monitoring	Temperature data trend prediction algorithm	Monitoring depth 5m	Seabed evolution analysis

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Technological evolution and standard innovation

This standard systematically integrates four types of monitoring technologies for the first time: Vibration monitoring uses phase-sensitive OTDR technology, and the positioning accuracy is 50% higher than that of traditional DAS; temperature monitoring distinguishes between Brillouin (≥10km) and Raman (<10km) principles, with a spatial resolution of 1m; and depth monitoring innovatively uses the temperature data inversion algorithm to break through the distance limitation of traditional acoustic detection.

Typical configuration scheme

• 110kV and above AC cables: full subsystem configuration (vibration + temperature + burial depth + ship)
• 35kV collector line △ △ √

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  Implementation suggestions and precautions

  1. System integration: It is recommended to adopt a star Ethernet architecture to ensure that the data synchronization accuracy of each subsystem is ≤2s
  2. Environmental adaptability: The equipment must meet the salt spray corrosion level C5-M (GB/T 2423)
  3. Data security: It should comply with the DL/T 2202 information security specification and set three levels of operation permissions
  4. Maintenance strategy: Abnormal data shall be stored for ≥ 3 years, and positioning accuracy shall be verified regularly (at least once a year)

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  Comparison analysis of standards

  Comparison dimension	NB/T 11299-2023	IEC 60794-5	GB/T 32346
  Monitoring distance	≤60km	≤40km	≤30km
  Temperature accuracy	±1℃	±2℃	±1.5℃
  Multi-system Integration	Mandatory	Recommended	Optional