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DIA TECH ThM THERMAL DIAGNOSIS MODULE
changes due to leakage or clogging within
the cooling systems. Plausibility check is performed by an
additional software program which checks
the validity of signals. It works by cross-
checking of comparable adjacent values.
Thus at least three of such values must be
available.
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VA TECH HYDRO
Diagnosis Module for monitoring of
stator and cooling circuit
consisting of:
Diagnosis software
DIA TECH ThM
THERMAL DIAGNOSIS MODULE
Trend display
DIA TECH ThM provides thermal diagnosis for the stator core
of the generator based on the installed
core-temperature sensors. Temperature-
rises are evaluated in correlation to the
load condition with the help of mathematic
algorithms. The hotspot-detection is
restricted to the local area aound the
temperature sensors. If more than three
probes are available an automatic
plausibility check can be executed. thermal diagnosis for the stator winding
of the generator based on the installed
slot-temperature sensors. Temperature-
rises are evaluated in correlation to the
load condition with the help of mathematic
algorithms. The hotspot-detection is
restricted to the local area aound the
temperature sensors. If more than
three probes are available an automatic
plausibility check can be executed. thermal diagnosis for the generator cooling
circuit based on the installed air- and water-
temperature sensors. The heat exchange
capability of the air-water-cooling system is
evaluated based on a rule-based model.
Therefore it is possible to detect condition
Acquisition of measured values
All required values are generally available in
power plants. The DIA TECH System usually
obtains these measured values from the
existing automation, instrumentation or DIA TECH ThM
THERMAL DIAGNOSIS MODULE
VA TECH HYDRO GmbH & Co
Penzinger Strasse 76,
P.O. Box 5
A-1141 Wien
Phone (+43/1) 89 100-0
Fax (+43/1) 89 46 046
E-mail contact@vatech-hydro.com
VA TECH HYDRO GmbH & Co
Service Centre Weiz
Monitoring & Diagnosis
Elingasse 3, A-8061 Weiz
Phone (+43/3172) 606 2296
Fax (+43/3172) 606 496
E-mail diatech@vatech-hydro.at
is part of
, the integrated common solution for secondary technology.
Acquisition of measured values:
Required hardware:
Data acquisition components
PLC or control system *)
Auxiliary parameters
for diagnosis:
Stator current
eHYD.SR.64.1
000.W
.
C05
Main specs:
Number of measuring-points:
1software package is able to process about
6 x120 temperature signals.
Requirements:
DIA TECH ThM requires the data
management software package DIA TECH
CORE System.
All DIA TECH Modules are running
on standard personal computers with
Windows XP.
*) If no data acquisition is available, VA TECH HYDRO can supply one.
EXAMPLES OF DIAGNOSIS MESSAGES generator [n]:
slot temperature sensor [x] deviates excessively from average
problem in stator or cooler (y)
cold water temperature sensor [x] deviates excessively from average
problem in stator or cooler (y)
warning cooler number [x] has lost
cooling capability the machine
may be getting dirty (y)
PLAUSIBILITY CHECK generator [n]:
slot temperature sensor [x] deviates excessively from average
defect sensor (y)
cold air temperature sensor [x] deviates excessively from average
defect sensor (y)
control system. The data transfer runs on
standardised interfaces based on Ethernet
connection under TCP/IP as well as on
serial connection.
The DIA TECH ThM module obtains the
temperature signals and stator current
(as important load information) from the
DIA TECH CORE system, processes them
and sends back calculated avarage
temperatures. The DIA TECH CORE system
is responsible for long-term storage in
database and smart trend visualisation
in the graphical user interface (GUI).
In case DIA TECH ThM has detected
any problem, it generates a smart text
message, which is displayed in the message
window of the GUI.
Stator current
Signal
Temperature
signal
Temp-range 1
Gradient
Time
Temperature
Current
Temp-range 4
Temp-range 2
Temp-range 3
Thermal Diagnosis
Monitoring of load dependent ranges & gradients
Old cooler