行业：电力行业

Online monitoring solution for SF6 gas leakage in power substations

Infrared SF6 online monitoring, coupled with oxygen content monitoring, facilitates a two-tiered alert system - early warning and emergency response

行业痛点

SF6 是 110kV 及以上变电站 GIS 设备的核心绝缘介质（断路器 / 互感器 / 母线），但作为强温室气体（GWP 23900）泄漏会同时触发：① 设备绝缘失效引发跳闸大面积停电；② 缺氧风险（SF6 比空气重 5 倍，沉积低洼处导致检修人员窒息）；③ 电弧分解产物 SO2 / HF / SOF2 剧毒（PC-STEL 仅 5 ppm）。传统人工巡检每月 1 次发现不及时，泄漏速率超 1% / 年（国标上限）后果是设备大修 + 监管处罚 + 碳排放披露问题。无人值守变电站、新建特高压站、智能变电站对在线监测刚需强烈。

方案概述

优锐安提供变电站 SF6 全寿命周期监测方案：① 定置式 SF6 红外 / 激光在线监测仪（精度 < 0.1 ppm，响应 < 5 秒）每个 GIS 间隔布 2-4 点；② SF6 分解产物（SO2 / HF）多气体组合监测，预警内部电弧故障；③ 缺氧报警器（O2 1% 联动停电检修）。设备符合 GB/T 8905-2012 + DL/T 596-2021 + Q/CSG 1204001-2014。可选配 IoT 无线传感器（不破坏 GIS 罐体）、视频联动（泄漏点定位）、移动巡检 PDA + 红外热成像复合。

## Recommended Locations

– **GIS room**: 1 point each at the top and bottom of each compartment, covering the SF6 deposition area that is heavier than air
– **SF6 gas cylinder storage room**: 6m² with at least one point equipped with O2 monitoring
– **GIS Maintenance Channel**: Portable 4-in-1 Inspection Instrument for SF6, O2, and Decomposition Products
– **SF6 recovery device**: real-time monitoring of flow rate + purity (including micro-water content + oxygen content)

## Key Technical Parameters

– Range: SF6 0-1000 ppm (ambient) / 0-100% Vol (high concentration)
– Accuracy: ≤ ±5% F.S
– Response time: T90 < 30 seconds - Operating temperature: -25℃ ~ +55℃ (required for outdoor stations) - Protection level: IP65 (indoor) / IP66 (outdoor) ## Implementation Essentials 1. **Automatic Leak Rate Calculation**: The monitoring platform calculates ppmv/year based on the tank volume and concentration changes, and provides early warning according to the IEC 60376 threshold 2. **Oxygen Deficiency Risk Interlock**: O2 < 19.5% → Emergency Ventilation + Access Control Lockout + SMS Notification to Duty Personnel 3. **Decomposition Product Warning**: Simultaneous increase in SO2 + HF → Early signal of internal arc fault → Immediately check the internal status of GIS 4. **Carbon Emission Disclosure**: Annual data can be directly integrated with GHG Protocol reports, meeting ESG disclosure requirements ## Regulatory Basis - GB/T 8905-2012 "Guidelines for Management and Detection of Gases in SF6 Electrical Equipment" - DL/T 596-2021 "Preventive Testing Procedures for Power Equipment" - Q/CSG 1204001-2014 China Southern Power Grid Enterprise Standard - GB/T 11023-2018 High-Voltage Switchgear - SF6 Gas Sealing Test - GB 50016-2014 Code for Fire Protection Design of Buildings (Ventilation Requirements for GIS Rooms) ## Applicable Customers State Grid / China Southern Power Grid 220kV / 500kV / 1000kV substations, wind power / photovoltaic booster stations, new energy aggregation stations, urban distribution stations, rail transit main transformers, and enterprise-owned substations.