HIGHVOLT HiMON® – Increase availability of cable systems

HiMON^® – Modular measuring and condition assessment system for fast localization of cable breakdowns and evaluation of partial discharges

Availability comparision of transmission lines

(Approximate availability depends on cable length)

Underground cable

95 %

Subsea cable

92-97 %

Overhead line

> 99 %

How to increase availability of cable transmission lines?

Condition assessment during factory testing, commissioning and operation

Fast localization of cable breakdowns

Detection of oncoming faults

Evaluation of aging

Increase in availability for cable systems

Target: Reduce 30 % of repair time

Target: 70 % of faults are found in advance, so they can be repaired during planned shutdowns.

HiMON^® makes the availability of cable systems comparable to that of overhead lines.

Product and service overview

Methods

RT-TF Analysis and synthesis of all cable sections

Periodic modelling of a cable section between two sensor units. Injection of small impulses into the cable in order to determine the transfer function of the cable section

TruePD Measurement and filtering of real signals

Localization and determination of detected partial discharges at the location of the fault under consideration of the actual cable transfer function. Classification and characterization of the events with AI algorithms.

Added availability of transmission systems functions

Manufacturing

Fast localization of cable breakdowns
Quality assurance (PD) for joints/cables

Installation

Theft monitoring for the cable system
Quality assurance (TF) during on site joint installation

Commissioning

Fast localization of cable breakdowns
Quality assurance (PD) for joints/cables

Operation

Fast localization of cable breakdowns
Small scale event evaluation
Risk analysis

HiMON^® increases the availability through combining functions in every phase of a cable lifespan

System integration

Installation of measuring points every 12 km is worldwide unique

Calculation of downtime cost savings

Cable length

in km

Transmission power

in MW

Energy cost per kWh

in EUR

The Calculation is based on following assumptions: Poles/Phases: 2, Annual failure rate per km and pole of an Underground cable: 0.0011, Annual failure rate per km and pole of a Subsea cable: 0.00011, Repair time of an Underground cable: 20 days, Repair time of a Subsea Cable: 90 days, Decrease of downtime time: 30 %, Decrease of unplanned cable breakdowns: 70 %

Annual downtime cost

73,920,000 €

Without HiMON^®

15,523,200 €

With HiMON^®

Availability

90.36 %