Partial Discharge Training

Partial Discharge Training

Partial Discharge (PD), as its name would suggest, is an electrical discharge that occurs across a portion of the insulation between two conducting electrodes, without completely bridging the gap. PD’s are caused when there is a discontinuity in the insulation system and as a general ‘rule-of-thumb’ PD will occur in systems operating at voltages of 3000V and above (although it should be noted that PD can occur at lower voltages than this). Partial discharges can occur in voids in solid insulation (paper, polymer etc), along the interfaces of multi-layer solid insulation systems, in gas bubbles in liquid insulation or around an electrode in a gas (corona discharge). Partial Discharge activity can initiate under normal working conditions in high voltage equipment where the insulation condition has deteriorated with age, has been aged prematurely by thermal or electrical over-stressing or due to improper installation (this leads to ‘infant mortality’). PD can often be observed with the commissioning of new equipment due to improper installation, poor design and/or workmanship (this is seen particularly in cable joints and terminations which are made-up on site). It is known that poor workmanship can lead to ‘infant mortality’ of MV/HV networks with a disproportionate percentage of insulation failures being observed within the first 1-3 years of service compared to the rest of the service life of the cables/plant

•To understand the basics of stator winding insulation systems and why they deteriorate
•To understand basic PD theory
•To understand how PD detection devices work
•To interpret the test data collected and relate the data to specific failure mechanisms, to enable you to plan maintenance

1.Introduction to Partial Discharge and Diagnostics for High Voltage Equipment
2.Equipment failure mechanisms
3.Conventional and unconventional test techniques
4.On-line and Off-line methods
5.How to test different items of plant
6.Deployment of PD Testing in Asset Management Programs
7.Ageing population problem
8.Focus plant replacements/avoid unplanned outage
9.Increasing failure rate or problem with a particular plant type
10.Troubleshooting and failure investigations
11.Safety (mostly with cable terminations & sealing ends/outdoor HV plant)
12.Quality Assurance
13.Partial Discharge Testing and Diagnostics for MV and HV Cables
14.Introduction to test methodologies
15.PD Location methods
16.Assessing criticality
17.PD Testing and Diagnostics for MV Switchgear
18.Introduction to test methodologies
19.PD Location methods
20.Assessing criticality
21.Partial Discharge Testing and Diagnostics for Motors and Generators
22.Introduction to Online PD Testing of HV Motors & Generators
23.Recognising Phase-Resolved PD (PRPD) Patterns
24.Assessing criticality
25.Case studies

•Case Study

•Convinience Meeting room
•2x coffee break and lunch during training
•Training kit
•Hard and soft copy material

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