A power cable is exposed to electrical, thermal and mechanical effects during its operating time. The power transfer capacity of a high voltage power cable is limited by high-temperature regions that can damage the cable insulation. Being damaged means degradation in the quality of insulation, occurrence of partial discharges and ultimately a breakdown of the insulation.

Installing distributed fibre optic based monitoring technologies for continuous monitoring of cable infrastructure and substation assets offers multiple technical and commercial advantages.

Key benefits

  • Real-time processing of temperature data
  • Optimum use and temperature profile control before and during load transmission
  • Advanced intrusion detection solution
  • Easy integration across a wide area of networks
  • Ability to predict cable behaviour under future load scenarios

Silixa’s cutting edge range of distributed fibre optic sensing technologies, including temperature (ULTIMA™ DTS and XT-DTS™) and acoustic (iDAS™) monitoring, coupled with the company’s integrated approach secures reliable asset monitoring.

With our range of electrical utility focused HMI and SCADA solutions, a utility can integrate an intelligent asset monitoring platform across the utility’s wide area networks. Such solutions enable seamless integration with load management and security monitoring systems, thereby providing the utility with effective Real Time Thermal Rating (RTTR) and advanced intrusion detection solutions.

The application of RTTR software with the ULTIMA DTS has demonstrated that it is possible to predict in real time, thermal bottlenecks and overload conditions. The Silixa solution provides fundamental monitoring in the case of circuit maintenance and reinstatement regimes. Under such conditions the network transport link may be more heavily loaded that it would under normal conditions. Silixa’s solution provides the necessary asset knowledge base to enable a managed prediction of the cable behaviour under predetermined future load scenarios.

The application of Silxa’s iDAS technology also provides the capability to monitor for unplanned third party intervention on the network’s critical transmission links. The technology helps network operators to minimise the risk of limiting the incidence of dangerous circuit operating conditions and thereby minimising unwanted outages. The inherent capabilities of this technology provide the electrical utility with a fantastic opportunity to harness this technology for many future applications.

The adoption of this integrated approach from Silixa can enable power grid owners to defer investment on new assets. This approach provides efficiencies in monitoring of existing assets ensuring they are operated to their maximum potential. It also assists the utility in supporting the preservation of the environment and natural resources.

The image above shows an example of a top level screen of the RTTR software. Systems are user configurable.

Data gathering tools enable summary displays and also offer the flexible integration of site data onto distributed databases for easy retrieval