US 12,651,908 B2 · Energy supporting device

Abstract

An energy supporting device for a high voltage direct current, HVDC, transmission system includes an energy supporting device for providing grid forming and/or virtual synchronous machine, VSM, capabilities to the HVDC transmission system. The energy supporting device comprises a plurality of cells configured to be connected to the HVDC transmission system, and a cell includes a full-bridge arrangement of power switches, an energy storage device electrically connected to the full-bridge arrangement, a resistor electrically connected between the plurality of cells and an electrical reference potential, and a bypass switch configured to allow the resistor to be bypassed. The energy supporting device is configured to be operated in a dissipation mode, in which the bypass switch is in an open state for allowing the resistor to dissipate electrical energy from the HVDC transmission system, and in which the energy storage devices of the plurality of cells are bypassed.

Claims20

Dependent claims

An energy supporting device for providing grid forming and/or virtual synchronous machine (VSM) capabilities to a high voltage direct current (HVDC) transmission system, wherein the energy supporting device comprises:

a plurality of cells configured to be connected to the HVDC transmission system, wherein a cell includes:
a full-bridge arrangement of power switches;
and
an energy storage device electrically connected to the full-bridge arrangement;
a resistor electrically connected between the plurality of cells and an electrical reference potential;
and
a bypass switch configured to allow the resistor to be bypassed;
wherein the energy supporting device is configured to be operated in a dissipation mode, in which the bypass switch is in an open state for allowing the resistor to dissipate electrical energy from the HVDC transmission system, and in which the energy storage devices of the plurality of cells are bypassed.

5 more elements

A method for providing grid forming and/or virtual synchronous machine (VSM) capabilities to a high voltage direct current (HVDC) transmission system, wherein the grid forming and for virtual synchronous machine, VSM, capabilities are provided by means of an energy supporting device comprising:

a plurality of cells connected to the HVDC transmission system, wherein a cell includes:
a full-bridge arrangement of power switches;
and
an energy storage device electrically connected to the full-bridge arrangement;
a resistor electrically connected between the plurality of cells and an electrical reference potential;
and
a bypass switch configured to allow the resistor to be bypassed;
the method comprising the steps of:
dissipating a surplus of electrical energy from the HVDC transmission system by opening the bypass switch of the energy supporting device and transmitting the surplus of electrical energy to the resistor of the energy supporting device.

6 more elements

Dependencies are inferred from the claim text.

Energy supporting device

Life of this patent

Energy supporting device

Life of this patent

Abstract

Claims20