Shielding Arrangement for High Voltage Equipment
AssigneeABB Power Grids Switzerland AG
InventorsMats Larsson, Dong Wu, Liliana Arevalo, Christer Tornkvist
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Abstract
A shielding arrangement can be provided for a piece of high voltage equipment spaced from a neighboring object. The piece of high voltage equipment has a first electric potential and the neighboring object has a second electric potential. The shielding arrangement includes a resistor, a shield element for connection to the high voltage equipment via the resistor, and a capacitor connected in parallel with the resistor. A resistance of the resistor and a capacitance of the capacitor together define a time constant in a range of 10 μs-50 ms.
Claims12
A shielding arrangement for a piece of high voltage equipment spaced from a neighboring object, wherein the piece of high voltage equipment has a first electric potential and the neighboring object has a second electric potential, the shielding arrangement comprising:
- a resistor;
- a shield element for connection to the piece of high voltage equipment via the resistor;
- and
- a capacitor connected in parallel with the resistor, wherein the resistance of the resistor and capacitance of the capacitor together define a time constant in a range of 10 μs-50 ms.
A converter station comprising:
- a converter configured to convert between alternating current and direct current, the converter comprising a plurality of converter valves having a first electric potential;
- an enclosure enclosing the converter, the enclosure having a second electric potential;
- and
- a shielding arrangement located between the enclosure and at least one of the converter valves, the shielding arrangement comprising a shield element connected to the at least one converter via a resistor a capacitor that are connected in parallel, wherein a resistance of the resistor and a capacitance of the capacitor together define a time constant in a range of 10 μs-50 ms.
The converter station according to claim ii, wherein the first potential is an operating potential of the valves and the second potential is ground potential.
Dependencies are inferred from the claim text.