Current-rise limitation in high-voltage dc systems
AssigneeABB Technology AG
InventorsChristian Schacherer, Markus Abplanalp, Markus Bujotzek, Emmanouil Panousis
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Abstract
To limit current rise in a high voltage DC system, the current can be led through a current rise limiter. An exemplary current rise limiter can have an inductance that increases with the current I through the current rise limiter and/or with a time-derivative dI/dt of the current I. In such a system, the current rise limiter can have minor influence on normal operation, but can limit the rise rate of the current in the event of a fault to, for example, provide more time to switch off the current.
Claims18
A method for limiting a current rise in a high voltage DC network, the method comprising:
- selecting a current rise limiter which has an inductance that increases with a time-derivative dI/dt of a current I;
- and
- arranging the inductive current rise limiter in the network.
A high-voltage DC circuit breaker, comprising:
- a switching assembly for interrupting a high-voltage DC current I;
- and
- an inductive current rise limiter arranged in series to said switching assembly, wherein said current rise limiter has an inductance that will increase with a time-derivative dI/dt of said current I.
Dependencies are inferred from the claim text.