Method of providing power support to an electrical power grid
AssigneeABB Power Grids Switzerland AG
InventorsJean-Philippe Hasler, Jan Kheir, Philippe Maibach
Life of this patent
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Abstract
A method of providing power support to an electrical power grid is provided. The power support is provided by an arrangement including a synchronous machine connected to a converter, the converter in turn being connected to the electrical power grid. The method is performed in a control device controlling the arrangement and includes: receiving feedback from one or both of the electrical power grid and the synchronous machine, and controlling the converter such that power support is provided to or absorbed from the electrical power grid by means of the synchronous machine based on the received feedback. A control device, arrangement, computer program and computer program products are also provided.
Claims21
A method of providing synthetic inertia for frequency support to an electrical power grid, the support being provided by an arrangement comprising a synchronous machine connected to a power electronic (PE) converter, the PE converter being connected to the electrical power grid, the method being performed in a control device controlling the arrangement, the method comprising:
- setting an initial rotational speed of a rotating mass of the synchronous machine in proportion to a nominal frequency of the electrical power grid;
- receiving feedback from the electrical power grid and the synchronous machine;
- and
- controlling, based on the received feedback, energy stored in the rotating mass such that synthetic inertia is provided to the electrical power grid via the PE converter, wherein controlling the energy stored in the rotating mass controls power provided to the electrical grid from the synchronous machine and controls power absorbed from the electrical grid to the synchronous machine.
A control device for controlling provision of synthetic inertia to an electrical power grid for frequency support, the synthetic inertia being provided by an arrangement comprising a synchronous machine connected to a power electronic (PE) converter, the PE converter being connected to the electrical power grid, the control device being configured to control the arrangement by:
- setting an initial rotational speed of a rotating mass of the synchronous machine in proportion to a nominal frequency of the electrical power grid;
- receiving feedback from the electrical power grid and the synchronous machine;
- and
- controlling the PE converter such that synthetic inertia is provided to the electrical power grid by the synchronous machine based on the received feedback, wherein controlling the PE converter controls power provided to the electrical grid from the synchronous machine and controls power absorbed from the electrical grid to the synchronous machine.
A method of providing synthetic inertia for frequency support to an electrical power grid, the support being provided by an arrangement comprising a synchronous machine connected to a converter, the converter being connected to the electrical power grid, the method being performed in a control device controlling the arrangement, the method comprising:
- setting an initial rotational speed of a rotating mass of the synchronous machine in proportion to a nominal frequency of the electrical power grid;
- receiving feedback from the electrical power grid and the synchronous machine;
- controlling, based on the received feedback, energy stored in the rotating mass such that synthetic inertia is provided to the electrical power grid, wherein controlling the energy stored in the rotating mass controls power provided to the electrical grid from the synchronous machine and controls power absorbed from the electrical grid to the synchronous machine;
- and
- detecting a fault condition in the electrical power grid or the converter and bypassing the converter by a breaker device in response to detecting the fault condition.
Dependencies are inferred from the claim text.