Advanced Diagnostic Tools for Testing of Pilc &Xlpe High Voltage Cables
Abstract
Electrical cables are the major arteries for electrical power. The power utilities are facing new challenges due to liberalization of electricity. It means reliability demand on distribution network is increasing day by day. The distribution networks are mainly cable networks of different voltage grade and dielectrics. Therefore, the proof design of cables is required after installations. During installation the wear and tear of the cables are must due to mechanical and environmental stresses.
Cables are buried in the ground, laid in conduits, hung down on the mines haft/trays/ducts them to survive the elements and man .Today ,it is possible to, on site, do cable diagnostics of all types of high voltage cable.
This paper will mainly concentrate on PILC & XLPE cable of different voltage grade. There are three major categories of cable tests as noted below: (a) High Potential Withstand Test (HI-POT) (b) General Condition Assessment(GCA] (c) Partial discharge (PD) In this paper, the emphasis has been given to the diagnostic method for VLF & TD, PD for PILC & XLPE cables.
Key words-Water tree, Damped Alternating Current (DAC), Very Low Frequency (VLF) & Tan Delta (TD), ) Partial discharge (PD), Oscillating Wave Test Method (OWTS).
1. Introduction
Liberalization of electricity markets brings about important changes in the working environment of power utilities. The power utilities are facing new challenges everyday pertaining to the reliability of power system. It means reliability demands on distribution networks are increasing. To meet this demand in proper way, it is necessary to avoid shutdowns/breakdowns of the networks. To maintain the reliability demand of utilities, it is important to do right things at .right place at right time. As a result the network operators have to concentrate more on asset management to reduce the costs, to postpone the investment, to optimize technical management
Electrical cables are the major arteries for electrical power. The power utilities are facing new challenges due to liberalization of electricity. It means reliability demand on distribution network is increasing day by day. The distribution networks are mainly cable networks of different voltage grade and dielectrics. Therefore, the proof design of cables is required after installations. During installation the wear and tear of the cables are must due to mechanical and environmental stresses.
Cables are buried in the ground, laid in conduits, hung down on the mines haft/trays/ducts them to survive the elements and man .Today ,it is possible to, on site, do cable diagnostics of all types of high voltage cable.
This paper will mainly concentrate on PILC & XLPE cable of different voltage grade. There are three major categories of cable tests as noted below: (a) High Potential Withstand Test (HI-POT) (b) General Condition Assessment(GCA] (c) Partial discharge (PD) In this paper, the emphasis has been given to the diagnostic method for VLF & TD, PD for PILC & XLPE cables.
Key words-Water tree, Damped Alternating Current (DAC), Very Low Frequency (VLF) & Tan Delta (TD), ) Partial discharge (PD), Oscillating Wave Test Method (OWTS).
1. Introduction
Liberalization of electricity markets brings about important changes in the working environment of power utilities. The power utilities are facing new challenges everyday pertaining to the reliability of power system. It means reliability demands on distribution networks are increasing. To meet this demand in proper way, it is necessary to avoid shutdowns/breakdowns of the networks. To maintain the reliability demand of utilities, it is important to do right things at .right place at right time. As a result the network operators have to concentrate more on asset management to reduce the costs, to postpone the investment, to optimize technical management