Lord Consulting

1. INTRODUCTION

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. The technologies and techniques described have been developed through direct industrial application over an 8-
year period, initially in the UK, and more recently (over the past 5 years) in an increasing number of countries around the World. This development has been made in conjunction with HV plant end users (utilities and private
plant owners), test service providers and MV/HV plant manufacturers.
The new technology has been built around the development of the versatile PDGold© software which is used in conjunction with high-speed, digital storage oscilloscope (DSO) technology to produce the robust and portable OSM-Longshot© PD 'Spot' Tester for the On-line diagnostic PD testing of HV plant insulation. The applications to which the technology has been applied include:

• MV Cable PD testing, monitoring and mapping (PD site location)
• MV Switchgear PD testing and location
• MV and HV VT & CT PD testing
• MV Rotating Machine PD testing
• HV Cable and Cable Sealing End PD testing and cable mapping (PD site location)

This paper provides a review of these applications.

Full Paper (816KB PDF)