Method And Controller For Protecting A Voltage Source Converter
AssigneeABB Technology AG
InventorsJean-Philippe Hasler, Mauro Monge, Marcio De Oliveira
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Abstract
A method in a controller for protection of a voltage source converter including one or more phases, each phase including one or more series-connected converter cells. Each converter cell has a by-pass switch for enabling by-pass thereof. The method includes the steps of detecting an over-voltage condition, and controlling simultaneously the by-pass switches of each converter cell, so as to bypass the converter cells upon detection of such over-voltage condition. The invention also encompasses a controller, computer programs and computer program products.
Claims13
A method in a controller for protection of a voltage source converter comprising one or more phases, each phase comprising one or more series-connected converter cells, each converter cell comprising a by-pass switch for enabling by-pass thereof, the method comprising the steps of:
- detecting an over-voltage condition, and
- controlling simultaneously the by-pass switches of each converter cell so as to bypass the converter cells upon detection of such over-voltage condition.
A controller for controlling a voltage source converter comprising one or more phases, each phase comprising one or more series-connected converter cells, each converter cell comprising a by-pass switch for enabling by-pass thereof, the controller comprising a processor arranged to:
- detect an over-voltage condition, and to
- control simultaneously the by-pass switches of each converter cell so as to bypass the converter cells upon detection of such over-voltage condition.
A computer program for a controller controlling a voltage source converter comprising one or more phases, each phase comprising one or more series-connected converter cells, each converter cell comprising a by-pass switch for enabling by-pass thereof, the computer program comprising computer program code, which, when run on the controller, causes the controller to perform the steps of:
- detecting an over-voltage condition, and
- controlling simultaneously the by-pass switches of each converter cell so as to bypass the converter cells upon detection of such over-voltage condition.
Dependencies are inferred from the claim text.