Technical Articles

Development of new high current, Hybrid 'Ferrite-Rogowski', high frequency current transformer for partial discharge sensing in medium and high voltage cabling (Providence, RI, USA, November 2010)

This paper was presented by HVPD's Development Engineer, Marc Foxall, BEng (Hons) MIET, at the 59th International Wire & Cable Symposium - November 7th - 10th 2010 - Rhode Island Convention Centre, Providence, RI, USA. The authors describe the reports on the design and testing of a hybrid 'Ferrite-Rogowski' HFCT that has a sensitivity of over 10x that of a standard, air-cored Rogowski Coil sensor.

Deployment of Distributed On-Line Partial Discharge Monitoring Devices on Medium Voltage Electricity Networks (CIRED, Prague, June 2009)

This paper describes the development and deployment of new portable On-Line Partial Discharge (PD) monitoring devices for the condition monitoring of medium voltage (MV) cables and switchgear. The authors describe the technologies and methodologies which have been developed to enable complete network monitoring to be achieved in both small and large MV distribution networks.

Poster Session Paper (CIRED, Prague, June 2009)

This poster session was presented by Dr Lee Renforth at CIRED 2009 to illustrate the new Wide Area Distribution Network Partial Discharge Monitoring Solution.

On-line Partial Discharge (PD) Spot Testing and Monitoring of HV Cable Sealing Ends (CIGRE, Paris, August 2008)

This paper presents recent on-line partial discharge (PD) testing and software data analysis work carried out to develop a suitable and robust method for on-line PD spot testing and monitoring of in-service, energised HV outdoor cable sealing ends.

EDF Energy Identifies High-Risk Cable Sections (T&D World Feature Article, October 2007)

This article explains how EDF Energy used on-line partial discharge mapping to determine the integrity of aging cables on its underground MV network.

New Techniques for On-line Partial Discharge Testing of Solid-Insulated Outdoor MV and HV Plant (UPEC, Manchester University, September 2007)

This paper presents detailed new techniques for on-line partial discharge (PD) testing of the in-service, solid-insulated, MV and HV plant located in outdoor environments.

On-Line PD Testing of Outdoor HV Plant - Applying Experiences from 10 Years of PD Testing Indoors (CIRED, Vienna, Austria, May 2007)

This paper presents some new applications of on-line PD monitoring to outdoor solid-insulated MV/HV plant such current transformers, voltage transformers and cable sealing ends.

On-Line PD Testing - Now A Field Reality (AVO/Lord Technical Conference, Christchurch, New Zealand, October 2006)

This paper describes the application of a range of On-Line Partial Discharge (PD) Test Technologies suitable for the On-Line PD testing, monitoring and screening of both medium voltage (MV) and high voltage (HV) plant.

Partial Discharge Measurements and Damage to High Voltage Cables (Insucon, Birmingham, UK, May 2006)

This paper details an a case at EDF Energy in London where a section of PILC cable with partial discharge activity was excavated and analysed.

Fault Location Techniques for one of the World's Longest AC Interconnector Cables (The 8th IEE International Conference on AC and DC Power Transmission, ACDC 2006, London, UK, March 2006)

This paper details time-domain reflectometery (TDR) tests carried out on the 90 kV AC subsea interconnect cable between the electrical distribution system on the Isle of Man and the UK mainland power system.

MV Cable Diagnostics - Applying Online PD Testing And Monitoring (Asia Pacific Conference on MV Power Cable Technologies, Kuala Lumpur, Malaysia, September 2005)

The cable fault rate in most UK electricity distribution companies has been gradually increasing over the past decade and this trend is considered to be likely to accelerate as the average 'asset age' of the cable network continues to rise.

New Methods in On-Line PD Detection for HV Plant (UHVnet, Cardiff, UK, January 2005)

Partial discharge (PD) is becoming increasingly viewed as the best diagnostic for insulation, particularly for on-line measurements. Clearly this applies to insulation which exhibits and is degraded by PD activity.

PD Monitoring - A Critical Tool For Condition-Based Assessments (Transmission & Distribution World, December 2003)

The United Kingdom's electricity supply industry will face a new set of challenges over the next decade as it strives to improve and maintain supply standards while minimizing operations and maintenance (O&M) costs.

An Integrated Approach To On-Line PD Monitoring And Diagnosis of MV Plant Condition For Application as A Pre-Maintenance Tool (CIRED, Barcelona, Spain, May 2003)

Through the application of a combination of new PD spot-test equipment, PD location equipment and PD Diagnostics it is now possible for the MV Plant owner to systematically identify the condition of their 'critical' plant and then to constantly monitor this condition through the use of permanent, remotely-accessible on-line monitoring equipment.

Diagnostics for MV cables and Switchgear as a Tool for Effective Asset Management (CIRED, Amsterdam, Holland, June 2001)

The introduction of diagnostics into the maintenance and operation of high voltage plant should show clear benefits if it is to be a useful tool in running a competitive electricity distribution company. This paper gives examples of diagnostic methods applied to London's 11kV cable network.

Some Advances in PD Monitoring for High Voltage Cables (IEE Colloquium on MV Paper Cables: Asset or Liability?, UK, April 1998)

Some advances have been made recently with detection of the PD activity of medium voltage cables, using an on-line method of detection. This paper illustrates the relationship between the original VLF (very low frequency) power supply results of PD mapping in medium voltage cables, and the newer on-line monitoring methods. The on-line methods offer the possibility of scanning circuits quickly and relatively cheaply to obtain meaningful PD data for older installed cables.