Travelling wave pilot protection of a transmission line based on time synchronization
AssigneeABB Power Grids Switzerland AG
InventorsYouYi Li, Jianping Wang, Kai Liu
Life of this patent
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Abstract
A mechanism for travelling wave pilot protection of a transmission line and method for receiving indications of a travelling wave from two terminals of a transmission line, wherein two terminals are time synchronized. The method includes making a trip decision based on the indications using a short trip window. An arrangement is configured to perform the disclosed method.
Claims20
A method for travelling wave pilot protection of a transmission line, the method comprising:
- receiving indications of travelling waves from two terminals of the transmission line, the two terminals being time synchronized;
- checking whether the indications from the two terminals occur within a short trip window;
- confirming, based on the checking, that the indications from the two terminals relate to a same travelling wave;
- and
- making a trip decision based on the confirming that the indications from the two terminals relate to the same travelling wave.
An arrangement for travelling wave pilot protection of a transmission line, the arrangement having a processing unit, the processing unit being configured to cause the arrangement to:
- receive indications of travelling waves from two terminals of the transmission line, wherein the two terminals are time synchronized;
- check whether the indications from the two terminals occur within a short trip window;
- confirm, based on the check, that the indications from the two terminals relate to a same travelling wave;
- and
- make a trip decision based on the confirmation that the indications from the two terminals relate to the same travelling wave.
Dependencies are inferred from the claim text.