Siemens Aktiengesellschaft

Hermann Scheil

Lutz Intichar

Horst-Werner Emshoff

A method for analyzing or conditioning a measurement value identified in a system process of a measurement system and a measurement value analyzer for carrying out the method, test the measurement value for plausibility at a first comparison point with reference to characteristic variables specific to the measurement system. In order to achieve a particularly high degree of reliability when monitoring the measurement value for errors, the consistency of the measurement value with measurement parameters identified independently of the measurement value, is tested at a second comparison point with reference to rules characteristic of the system process. A confidence factor for the measurement value is identified in dependence on a result of the testing.

Method for analyzing a measurement value and measurement value analyzer

In order to monitor the temperature of an electric generator, the temperatures of a plurality of rods of a stator winding of the generator being cooled by a coolant, preferably a water-cooled stator winding, are detected. In order to detect a temperature deviation in each winding rod, a measured actual or real temperature value of each winding rod is compared with a reference value for the winding rod. The reference value is derived from parameters previously determined for the winding rod by reference measurement and from presently or currently detected, operation-relevant parameters of the generator. The parameters for each winding rod are derived from a temperature of the winding rod detected during the reference measurement and from a number of functions that corresponds to the number of parameters. The functions are derived from operation-relevant parameters detected during the reference measurement in different states of operation of the generator. The temperature may thus be monitored while operation-relevant influencing variables, such as the stator current of the generator, are taken into account.

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Hemhofen, Germany

Hermann Scheil