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Energy Support GmbH . Sperberweg 47 . D - 41468 Neuss T +49 2131 4039607 . F +49 2131 4039608 . [email protected]

On – site Dissolved Gas Analysis according to

IEC60567 / ASTM D 3612

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Which tests can you do on transformer oil at – site?

Breakdown voltage tests Tan Delta and resistivity tests Water content measurement acc. to Karl-Fischer Total gas content measurement Dissolved Gas analysis

The total of all parameters allows a diagnostic about the condition

of the transformer

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What is Dissolved Gas Analysis?

A quantitative analysis of all dissolved gases in the

transformer oil. The analysis is done after the extraction of

the gases and a gas chromatography thereafter.

The aim of the analysis is an early determination of aging

and functional problems of the transformer.

모든정량분석은 변압기 오일을 용해하는것입니다 . 이 분석은

가스의 추출과 가스 chromatography thereafter 를 한후에 이루어 집니다 . 이 분석의 목표는 변압기의 노화와 기능적결함을 초기에 진단하는 것입니다 .

PREDICTIVE MAINTENANCE !

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Which gases need to be detected ?accord. to ASTM 3612 / IEC 567

ASTM 3612 IEC 567

Oxygen O2, Nitrogen N2 Oxygen O2, Nitrogen N2

Hydrogen H2 Hydrogen H2

Carbon Monoxid CO, Carbon Dioxid CO2 Carbon Monoxid CO, Carbon Dioxid

CO2

Methan CH4 Methan CH4

Ethan C2H6 Ethan C2H6

Ethylen C2H4 Ethylen C2H4

Acetylen C2H2 Acetylen C2H2

Propan C3H8 (Propan C3H8, Propylen C3H6

Propylen C3H6

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Which gases are detected ?

Oxygen O2, Nitrogen N2

Hydrogen H2

Carbon Monoxid CO, Carbon Dioxid CO2

Methan CH4

Ethan C2H6

Ethylen C2H4

Acetylen C2H2

Propan C3H8

Propylen C3H6

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The Use of Atmospheric Gases

N2 and O2 are indispensable for the evaluation of the transfomer condition

N2: Referenzvalue for the gas saturation.

O2: Very important indicator for the ageing process

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60.000

400 1600

15.000

N 2

H 2

Gas saturation level > 50.000 < 70.000ppm

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The Use of Secondary Gases (Propan and Propen)

The ‘Memory‘ of Thermic Faults

Due to the slow solubility of C3H6 and C3H8 both gases serve as a memory of Thermic faults.

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Reasons for high gas content and interpretation of the values with ratios

Electrical Discharge Acetylen C2H2 3Ethan C2H6

Partial Discharge Hydrogen H2 10Methan CH4

Overheating of Oil Ethylen C2H4 1 for temperatures below 300 o CPropylen C3H6 1 for temperatures over 300 o C

Overheating of cellulosis Carbondioxid CO2 10Carbonmonoxid CO

Degradation of cellulosis caused by electr. Faults Carbondioxid CO2 3Carbonmonoxid CO

Leakage, contamination of the oil with ambient air Oxygen O2Nitrogen N2

Leacking tap changer vessel Acetylen C2H2 2Hydrogen H2

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An Example of Premature Ageing

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Advantages of on-site analysis

Minimizing problems of oil sampling

Time reduction ( sample dispatch, waiting for

results )

Direct Buchholzgas analysis

Short reaction times

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Steps of the Dissolved Gas Analysis

Degassing

Gas chromatography

Interpretation of the values with integrated

expert - system

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Degassing of oil sample

1. Preparation 2. Oilsample 3. Degassing 4. Gas transfer

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Partial Vacuum degassing acc. to IEC EN 60567

Advantages:

Easy extraction at-site

Simple to handle

Very high sensibility

High accuracy

Comparable with laboratory degassing

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Principle of a gas chromatographic analysis

Gas supply

Flow-

Controller

Injection

system

Detector

Column with oven

Electronic amplifier

Computer

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Automatic sample Loop

Sample Loop with fixed dosing: 100 µl

Carrier gas Carrier gasPosition „Load“

Position „Inject“

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Schematic of the Gaschromatograph

exte rn algas-supp ly

A r

connec to rs w ith f ilter h igh pressu re gas cy linde rs

H2

m as ter sw itch (open /c lose d)

H 2

m anom e te r A r

p ressu re re duce r

pum p

H2

A r

tcdfiltera ir

in jectorfid

sepa ra tion co lum n

h igh pressu re gas sup p ly

reference channel

sample channel

A r

H 2

p ressu re sw itch

e lectron icp ressu recontro ller

f. e.: C arboxen 1010 Plot0.32 m m i. d., 30 m length

e lectron icm ass flowcontro ller

21

34

6

5

sa m p lelo o p

2 0 0 µ l

6 -p o r t-va lv e

outle t

“Load”

e lectron icm ass flowcontro ller

Restrictor

Test point

Bypass

Valve

non -retu rn va lve s

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Typical Chromatograms

TCD-Channel FID-Channel

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MobilGC - Software

Clearly structured with

helpful tools for

monitoring and

evaluation

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MobilGC - Evaluation

Simple operation with clear structures

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MobilGC – Expert- System

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DUVAL TRIANGLE

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Advantages of the MobilGC

portable Gaschromatograph

Internal gas supply

Immediate analysis

Direct analysis of Buchholzgases

Online Monitoring of transformers through combination of autm. Vacuum degassing and MobilGC

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Analyse und Probenvorbereitung entsprechen dem KYOTO – Protokoll

Flamme wird mit Wasserstoff betrieben

Es erfolgt keine Emission von CO2 in die Umgebungsluft

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Automatic Vacuum Degassing without Mercury

Entgasungs-gefäß

M V 1

M V 2

M V 3

Pum pe

Septum p

Öl

Gas

Patent Nr. DE 10252652

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Automatic Vacuum Degassing without Mercury

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Comparison Measurements

Component Toepler-Pump Vacuum Degassing

Lab GC Mobil GC Lab GC Mobil GC

H2 234 235 225 239

CO 230 231 220 225

CO2 1320 1297 1243 1341

Methan 25 25 23 25

Ethan 162 165 115 149

Ethylen 10,1 10,0 7,4 10,9

Acetylen 0,8 1,0 0,4 0,76

Features and Benefits:

■ Fully automatic procedure

■ One touch operation

■ Multi-periodic vacuum

degassing

■ Fast and reliable

■ Full TOGA analysis ( 11

gases )

■ Automatic transfer of gas

sample

■ Compl. to ASTM3612 / IEC

567

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TOP-TOGA- GC

Automatic Vacuumdegassing

without Mercury

Short degassing time ( < 3 min.)

Automatic Transfer of the gases to

the GC

Additional analog ports for further

parameters

Plausibility test and trendanalysis

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Online-Monitoring with Automatic Vacuumdegassing and MobilGC

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Further products for transformer testing

Karl Fischer Pocket Titrator

Tan delta and Resistivity Measurement

Total Gas Content Measurement

Capacitance test on transfomers

Petrochemical and Environmental Applications

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Pocket Titrator

Low background drift measuring cell

Preconfigured methods

“One click” measurement

AEC (automatically electrolysis controlled)

High precision even in low concentrations

Suitable for all commonly used Karl-Fischer-

reagents

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Tan Delta and Resistivity Measurement

Fully automatic testing sequence

Optional manual testing sequence

Automatic calibration and resistance measurement

Windows software

Menu driven software operations

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Total Gas Content Measurement

Gas separation by means of fully vacuum degassing ( accord. to DIN EN 60567, DIN IEC 599 and IEEE C57.104-1991) and display of results

Subsequently to the determination of the total gas content a gas chromatographic analysis can be made.

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Petrochemical and Environmetal Applications

portable GC for various applications

H 2 S Analysis

LPG Analysis

Environmental Applications

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Thank you

for

your attention !

MODERN-INTEC

T.02-588-3003

energy support experts in providing mobile solutions energy support gmbh. sperberweg 47. d - 41468...

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