30_KRUEGER_Cable Diagnosis and monitoring case studies.pdf

Diagnostic Measurements on High Voltage Cables

Dr. Michael Krüger (c) OMICRON

Commissioning of a 220kV Cable Cable

2

Commissioning of a 220kV Cable Overview

3

Commissioning of a 220kV Cable Section 1

4

Cable Joint with Screen Terminals

5

Check of the PD Measurement System

6

Test Setup

7

Measurement Principle at the Link Box

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Mounting PD Instruments at a Link Box In the open Land during Day

9

Mounting PD Instruments at a Link Box In the open Land during Day

10

Link Box and Optical Fibre Cable

11

Preparing the Optical Fibre Cable

12

Mounting PD Instruments at a Link Box In the open Land during Day

13

MPD600

Optical Fibre

HFCT

Mounting PD Instruments at a Link Box Besides the High Way during Day

14

Mounting PD Instruments at a Link Box On the High Way during Night

15

Performance Check at a Link Box

16

Optical Fibre

HFCT’s at the End Terminations

17 Outdoor termination GIS termination

High Voltage Test Source

18

High Voltage Lead to the Cable Termination

19

Diesel Generator

20

Test Voltage

21

Display of the High Voltage Source

22

PD Measurement Frequency Range Wideband PD Measurment System

23

Noise spectrum and PD measurement bandwidth (3,5-4,5MHz)

Damping of Impulses Along the Cable Measurement Frequency Range: 3,5 - 4,5 MHz

24

Coupling capacitor Cable termination Joint 1-2

Joint 2-3 Joint 3-4 Joint 4-5

Damping of Impulses Along the Cable At different Frequencies

25

Switching Impulses from the HV Test Source

26

Gating off the Noise Impulses Gating Unit connected to Antenna in the HV Test Source

27

Gating

Overview of all Channels at 180kV

28

Coupling capacitor

Cable end termination

Joint 1-2 Joint 2-3 Joint 3-4

Joint 6-7 Joint 7-8 Joint 8-9 Joint 4-5 Joint 5-6

Joint 11-12 Joint 12-13 Cable GIS termination

Joint 9-10 Joint 10-11

Gating unit

On-Line PD Measurement on a Transformer-GIS - Cable Connection (GIS Side)

29

2 1

3

Calibration with 1000pC on the GIS Side

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Calibration with 1000pC on the GIS Side

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Online PD Measurement at the GIS Side with 3-Channels

32

yellow phase GIS

red phase GIS

blue phase GIS

Sensors 1, 2 and 3 at GIS the Side and Sensor 4 at the Transformer Side

33

4 100m

Sensor 4 at the Transformer Side

34

PD Measurement at the GIS and the Transformer Side with 4-Channels

35

blue phase GIS

blue phase Tr

yellow phase GIS

PD Measurement at GIS and TR Side Trigger=TR Side - Delay on GIS Side

36

delayed signal blue phase GIS

trigger = blue phase Tr

PD Measurement at GIS and TR Side Trigger=GIS Side - Leading Signal on TR

37

leading signal blue phase TR

trigger = blue phase GIS

Jumper between Oil/Oil Bushing and Cable Termination

38

Jumper between Oil/Oil Bushing and Cable Termination

39

[email protected]

Questions and Remarks?