Circuit arrangement and method for interrupting a current flow in a DC current path
AssigneeABB Technology AG
InventorsEmmanouil Panousis, Jadran Kostovic, Lars Liljestrand, Markus Bujotzek, Per Skarby
Life of this patent
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Abstract
A DC current path for DC power transmission includes at least a first switching element and a second switching element connected in series. A resonance circuit is configured to be connectable in parallel to the series connection of the at least one first switching element and second switching element by means of a switch.
Claims40
A circuit arrangement for interrupting a current flow in a DC current path, comprising:
- at least one first switching element and at least one second switching element connected in series in the DC current path;
- and
- a resonance circuit being connected in parallel or being configured to be connectable by means of a switch in parallel to the series connection of the at least one first switching element and at least one second switching element,
- wherein the first switching element includes one of an oil circuit breaker, a minimum oil circuit breaker, a strongly blow electric arc, a splitter blade, and a FCS commutation switch, and
- wherein the first switching element comprises a circuit breaker with a negative slope in at least a portion of its electric arc voltage over electric arc current characteristic.
A circuit arrangement for interrupting a current flow in a DC current path, comprising:
- at least one first switching element in the DC current path;
- and
- a resonance circuit configured to be connectable in parallel to the at least one first switching element by means of a switch,
- wherein the first switching element has an electric arc voltage over electric arc current characteristic including at least one electric arc voltage of sufficient magnitude for generating a counter-current in the resonance circuit greater or equal to an electric arc current in the DC current path upon closing the switch, and
- wherein the first switching element comprises a circuit breaker with a negative slope in at least a portion of its electric arc voltage over electric arc current characteristic.
A method for interrupting a current flow in a DC current path, comprising:
- detecting an interrupt scenario for the DC current path including at least one first switching element and at least one second switching element connected in series, the first switching element including one of an oil circuit breaker, a minimum oil circuit breaker, a strongly blow electric arc, a splitter blade and an FCS commutation switch;
- effecting an open state of the at least one first switching element and at the least one second switching element;
- and
- connecting a resonance circuit in parallel to the series connection of the at one least first switching element and the at least one second switching element for generating a counter-current in the resonance circuit,
- wherein the first switching element comprises a circuit breaker with a negative slope in at least a portion of its electric arc voltage over electric arc current characteristic.
A method for interrupting a current flow in a DC current path, comprising:
- detecting an interrupt scenario for the DC current path including at least one first switching element,
- effecting an open state of the at least one first switching element;
- and
- connecting a resonance circuit in parallel to the at least one first switching element in response to an electric arc voltage at the first switching element being of sufficient magnitude for generating a counter-current in the resonance circuit greater or equal to an electric arc current in the DC current path upon activating the switch,
- wherein the first switching element comprises a circuit breaker with a negative slope in at least a portion of its electric arc voltage over electric arc current characteristic.
Dependencies are inferred from the claim text.