Overhead Lines: Temperature & Load Assessment
Combine DTS temperature with operating data for thermal and load assessment. OPGW temperature is not conductor temperature; a thermal-coupling model must be established and validated.
POWER GRID / FIBER SENSING
Along the Fiber,
Monitor the Grid
Monitoring tasks for transmission, substations, cables and tunnels based on temperature, strain and vibration.
01 / SENSING TECHNOLOGIES
Three Complementary Measurements
- DTS / Raman
- Distributed temperature
- BOTDR / BOTDA
- Temperature and strain
- DAS
- Vibration / Acoustic events
Technologies differ in fiber type, reach, attenuation, sampling speed and interrogation equipment. Reusing communication fibers requires available cores and compatible systems.
02 / APPLICATIONS
From Overhead Lines to Cable Tunnels
Icing, Galloping & Deformation
Use Brillouin strain and DAS vibration to detect anomalies. Ice thickness and tower condition require structural models, calibration and reference sensors.
Corridor Fires & Construction Disturbance
Associate temperature anomalies and vibration events with line sections, supported by video or inspections. Fiber placement and heat-transfer conditions determine detection coverage.
Underground Cables & Cable Tunnels
Track cable and joint heating, external disturbances and settlement-related deformation for section alerts and trend records.
Submarine Cable Monitoring
Study temperature, strain and external disturbances according to cable structure and installation, with defined reach, location and attenuation constraints.
Substation Monitoring
Develop monitoring for transformer hot spots, GIS partial discharge and switchgear heating, selecting probes or fiber solutions for installation and bandwidth requirements.
03 / ENGINEERING
Validate Before Deployment
Route Survey
Identify fiber cores, splices, attenuation, routing and priority risk sections.
Pilot Deployment
Collect normal and anomalous data in representative sections to build event samples.
Evaluation & Integration
Assess location accuracy, false and missed alarms, temperature–strain decoupling and stability; integrate with alert work orders.
SOLUTION / TARGETS
Deployment priorities
Cable and joint heating
Route sensing fiber along the cable sheath, including joints, bends and thermally critical sections.
External disturbance
Combine event location, duration and video to prioritize inspection.
Operating trends
Relate temperature trends to current, environment and cable thermal models.
SOLUTION / CONFIGURATION
System configuration
| Monitoring task | System configuration | Outputs |
|---|---|---|
| Temperature | DTS interrogator + cable-mounted fiber | Temperature, hotspot location and rate of change |
| Vibration | DAS interrogator + mechanically coupled fiber | Event location, vibration features and timing |
| Deformation | BOTDR / BOTDA + temperature compensation | Section strain and long-term trends |
| Data platform | Edge gateway + alarm/work-order interfaces | Route map, trends and event records |
Configure sensing and integration components for the selected site and monitoring task.
SOLUTION / DELIVERY
From site survey to operation
Survey
Record cable construction, fiber cores, splice losses and critical joints.
Install
Confirm mounting and thermal coupling; map fiber distance to route position.
Validate
Validate temperature, location and alarms using reference probes and controlled events.
Integrate
Connect load and environmental data to confirmation, dispatch and retesting.
SOLUTION / EVALUATION
Evaluation and acceptance
Temperature & location
Reference error, location error, spatial resolution and update interval.
Alarm quality
Measure detection, missed events, false alarms and latency by event class.
Operation
Availability, fiber-break location, splice loss and recovery time.
Plan a site trial
Route length, cable type, available fiber cores, critical joints and load-data interfaces.
BD@zhongkeyaoguang.com ↗CONTACT
Technical Enquiries
& Collaboration.
Contact us for product selection, development
and project collaboration.
TECHNICAL COLLABORATIONBD@zhongkeyaoguang.com ↗
266 Fangzheng Avenue, High-tech Park, Liangjiang New Area, Chongqing, China
Zhongke Yaoguang (Chongqing) Optoelectronics Technology Co., Ltd.