Arrester system of parallel-connected arresters, and method for detecting faults of the arresters
AssigneeSiemens Energy Global GmbH & Co. KG
InventorsThomas Hilker, Henrik Roggow
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Abstract
An arrester system has at least two parallel-connected arresters, each with a sensor for determining leakage currents. A monitoring system is configured to detect faults at the arresters by comparing sensor data. The method for detecting faults at parallel-connected arresters includes comparing in particular the present measured values of the arresters and/or from sensors of the arresters. A fault is detected when there are deviations between measured values of different arresters. The arrester system is identified as fault-free when measured values of the arresters, in particular of all arresters, are substantially the same.
Claims17
An arrester system, comprising:
- at least two arresters connected in parallel with one another;
- each of said arresters having a sensor for determining a leakage current;
- a monitoring system connected to said sensors and configured to detect a faulty arrester by comparing a temperature of each of said arresters measured simultaneously with all other said arresters.
A method for detecting faults at parallel-connected arresters of an arrester system, the method comprising:
- comparing current measurement values of the arresters or of sensors of the arresters, the current measurement values being current temperature values of each of the arresters, and thereby comparing a temperature of each of the arresters with all other arresters;
- and
- determining that a respective arrester is a faulty arrester when deviations are detected between the temperature values of different arresters measured simultaneously, and determining that the arrester system is free of faulty arresters when the measurement values of all of the arresters are substantially identical.
A method for detecting faults faulty arresters at parallel-connected arresters of an arrester system, the method comprising:
- providing an arrester system having:
- at least two arresters connected in parallel with one another;
- a monitoring system connected to receive temperature values related to the at least two arresters;
- comparing a temperature value of each of the arresters with all other arresters;
- determining that at least one arrester is a faulty arrester when deviations are detected between simultaneously measured measurement values related to the arresters, and determining that the arrester system is free of faulty arresters when the simultaneously measured measurement values are substantially identical.
Dependencies are inferred from the claim text.