Distributed Temperature Sensing, DTS

Smart Grid

Using DTS technology to monitor transmission and distribution power systems reduces costs by increasing the usable capacity of the circuits, avoiding cable damage, and extending cable life by maintaining optimal loading. Real-time distributed temperature monitoring enables:
  • Small hotspot identification
  • Load optimization
  • Access to all usable capacity with exceeding thermal capacity
  • Lifetime asset protection and monitoring of aging circuits
  • Verification of mathematical models
  • Early identification of joint deterioration
  • Fault detection and location
  • Fire detection capability in cable tunnels, ducts, and chases
DTS is recognized as a key Smart Grid technology as it allows users to maximize the current-carrying capacity within thermal limits, monitor circuit health, and optimize loading using actual rather than estimates of ambient thermal conditions. For more information about SensorTran’s Cable Ampacity Analysis Software please visit the software page and/or download the white paper at the bottom of this page. 

DTS systems are able to monitor multiple power circuits to capture and record dense temperature measurements over time. By combining actual thermal data with dynamic cable ratings, operators are able to maximize load carrying capacity while minimizing the risk of overheating the circuit. Overheating can result in reduced cable life or complete loss of the circuit.

Optical Conclusions™

Real-time thermal monitoring, combined with historic data analysis allows users to identify and anticipate any number of undesirable conditions. The following illustration highlights some of the conditions that lead to detectable thermal events.

Fiber Deployment

Optical fiber which is already integrated within the power cable itself can be easily utilized for monitoring. Where this is not the case, optical fiber can be securely retrofitted to the outside of the cable, typically within a stainless steel protective tube. Optical fiber can also be retrofitted into a duct bank. For more information about sensing cables and their construction click here.

SensorTran has hands-on experience deploying monitoring solutions to direct buried, duct, and tunnel cable installations. For more information regarding SensorTran’s installation services click here.

The optical fiber can be configured in either single-ended or double-ended configuration. Double-ended configuration is where both ends of the fiber are connected to the DTS system to form a “loop”. This has the additional advantage that in the unlikely event of a fiber break, the power cable can still be totally monitored by the system.

Transmission & Distribution Power Cable Monitoring — Download PDF
Cable Ampacity Analysis Software (CAAS) — Download PDF
Case Study: Municipal Utility — Download PDF
Case Study: Underground Transmission Circuit — Download PDF

Astra 5-10-15 km


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