Post on 14-Dec-2015
TRANSFORMERMONITORING
Integrated Solutions.Christian Buchner AREA SALES MANAGER NORTHERN EUROPE
Product facts ISM-solutionsI Key features & current projects
Monitoring of power transformersI ISM-solutions monitoring package
The approach for fleet monitoringI Communication concept & example project information
Requirements for todays power transformers in Smart GridI safe & reliable
I cost reduction & reduction of maintanence costs
I controlled overload capability
I long lifetime (extention)
safe and profitable
SMART GRID
Product facts ISM-solutionsI Key features & current projects
Monitoring of power transformersI ISM-solutions monitoring package
The approach for fleet monitoringI Communication concept & example project information
How to achive thisI life cycle management
I intelligent data management
I asset management and risk management
I load profiles and load forecasting
online and realtime monitoring system
SMART GRID
PRODUCT LIFE CYCLE MANAGEMENT
Information and communication technologyCornerstones
I CRM, customer relationship management
I HCM, health care managementI SCM, supply chain management
I ERP, enterprise resource planning
data acquisitionanalogue, digitalexisting sensors
retrofit of new sensors
aggregation and storage of data
interpretation of datalimit values
eventsrecommendationmaintenance,…
visualizationwebserver
communicationIEC61850, 104, DNP3,…
controle.g. AVR, cooling control
INTELLIGENT DATA MANAGEMENT
ASSET MANAGEMENT
Equipmentcondition
time
new condition
failure level
ageing factors degradation of equipment condition
100 %
0
consequently we need a monitoring system, indicating the condition of the asset.
Maintenance Strategies: instead of time based … instead of falilure based …
in order to use the assets at their maximum we should go towards condition based.
RISK MANAGEMENT
Risk Management Aspects in terms of Transformer Monitoring
Risk reduction
Minimizing of negative effects or probabilities of risk
Acceptance of potential consequences on particular risk
Risk evaluation
Composite Risk Index CRI = I x P
(Composite Risk Index = Impact of Risk event x Probability of Occurrence)
TRANSFORMER FAILURES
Winding 34%
Other 19.5%
Tank 21%Core 5%
OLTC 26%
Bushing 20%
Includes multiple answers
MONITORING POWER TRANSFORMERS
Transformer temperature and ageing
Source: IEC 60076-6
Hotspot Temperature °C
Relative aging rate
80 0,125
86 0,25
92 0,5
98 1,0
104 2,0
110 4,0
116 8,0
122 16,0
128 32,0
134 64
140 128
The hot-spot temperature is equal to the sum of the ambient temperature, the top-oil temperaturerise in the tank, and the temperature difference between the hot-spot and top-oil in the tank.
aging rate factor ( 0 < λ < 1(ς) )
MONITORING POWER TRANSFORMERS
Gas characteristics at insulating failure
Source: IEC 60076-6
Top Oil Temperature
Lifetime0% humidity
Lifetime2% humidity
80°C 118 years 5,7 years
90°C 38 years 1,9 years
98°C 15 years 0,8 years
Influence of humidity to transformer aging rate
transformer life health index
MONITORING POWER TRANSFORMERS
DGA - Gas characteristics at insulating failure
Source: Duval
~24h
I Hydrogen (H2)I Oxygen(O2)I Methane (CH4)I Carbon Monoxide (CO)I Carbon Dioxide (CO2)I Ethane (C2H6)I Ethylene (C2H4)I Acetylene (C2H2)I TDCGI Load guide
Key gases I Hydrogen (H2)I Carbon Monoxide (CO)I Ethylene (C2H4)I Acetylene (C2H2)
Failures I low energy H2, CH4, C2H6, CO, CO2.I high temperature C2H4I very high temperature/energy C2H2
MONITORING OLTC
While talking about Transformer Monitoring, it must be
remembered, that OLTC is a high complex part of a Power Transformer.
One major aspect when talking about Risk of failure of an OLTC is the maintenance strategy.
Equipment condition
time in years*
new condition
stress level
100% degradation
ageing factors degradation of equipment condition
actual condition
preventive
condition based
100 %
7 12-15
*(resp. No. of operations)
0
FUNCTIONS:
OLTC monitoringI Contact wear and carbonization, operation counter,
operation statistics, maintenance intervalsI Motor-drive supervision (tap position indication, motor-
runtime, motor protective switch)
GeneralI Digital nameplate for the transformer, OLTC & MDUI Communication protocol IEC61850I Flexible visualization via integrated web browser
Transformer monitoringI Measurement of temperatures (ambient, top-
oil, hotspot)I 3-phase voltage and current measurement,
calculation of power and cos phi I Thermal transformer monitoring (hot-spot
calculation, relative aging rate calculation) I Gas in oil monitoring: DGA supervision for 2
fault gases (CO & H2) and moisture in oilI Status information about transformer
protection systems
MONITORING OLTC
ISM ® – SOLUTIONS / -TECHNOLOGY TESSA® FLEET MONITORING TESSA®
SUBSTATION
limit value
gas-in-oil – content (e.g. CO)
time0 ppm
1500 ppm
ISM ® – SOLUTIONS / -TECHNOLOGY FLEET MONITORING TESSA®
ANALYSIS OF TRENDSI unexpected deviation between similar transformer-values-types
transformer
transformer transformer
TESSA® ac
tivates
alarm
temperature in °C
time0
130
ISM ® – SOLUTIONS / -TECHNOLOGY FLEET MONITORING TESSA®
ANALYSIS TEMPERATURESI unexpected deviation between identical transformers
transformer transformer
transformer
TESSA® ac
tivates
alarm
load in %
time0
100
ISM ® – SOLUTIONS / -TECHNOLOGY FLEET MONITORING TESSA®
ANALYSIS LOAD SHARING SUBSTATIONSI unexpected load share between substations
substation
substation
substation
ISM ® – SOLUTIONS / -TECHNOLOGY FLEET MONITORING TESSA®
EXCHANGE OF INFORMATION I signalization of events and trends within the TESSA®-system
I sending of emails and / or SMS...
I regional different service-groups will be contacted depending of affected region
I component-specific different service-instances will be contacted depending of affected components
with monitoringwithout
Purchasing 1. Maintenance 2. Maintenance 3. Maintenance 4. Maintenance date
Costs
Time
Cost savings with optimal utilization
COMPARISON COSTS IN MAINTENANCE
1. Maintenance 2. Maintenance
LIFE CYCLE MANAGEMENT
Scotish Power Energy Networks
Reduce costs through increase system efficency and lower network invests
Invest744 Mio. £
Savings50 Mio. £ per 100MW investment4 Mio. £ per annual operational savings
Source: LCNI conference 2014
Christian BuchnerMASCHINENFABRIK REINHAUSEN GMBH- Power Transmission / Automation & Control - - Area Sales Manager Northern Europe -Falkensteinstr. 8, 93059 Regensburg Phone: (+49) 941 4090 7910Mobil: (+49) 941 4090 87910Fax: (+49) 941 4090-7901Email c.buchner@reinhausen.comInternet www.reinhausen.com