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US 9,312,682 B2Granted
System and method for overvoltage protection
AssigneeGeneral Electric Company
InventorsRobert Gregory Wagoner, Allen Michael Ritter
Life of this patent
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Abstract
In one aspect, the present subject matter discloses a method for overvoltage protection of an electrical system. The method may generally include detecting an overvoltage condition on an electrical system; and switching on, in response to the detected overvoltage condition, an impedance connected to the electrical system, wherein the impedance clamps voltage on the electrical system.
Claims15
A method of overvoltage protection comprising:
- detecting an overvoltage condition on a poly-phase electrical system resulting from islanding of one or more sources of electrical generation from an electrical grid by detecting when a voltage on the electrical system meets or exceeds a voltage threshold value;
- and
- switching on, in response to the detected overvoltage condition, an impedance connected to the electrical system, wherein said impedance clamps and divides voltage on the electrical system between individual phases of the poly-phase electrical system.
A method of overvoltage protection for a grid-islanding event comprising:
- detecting a grid islanding event on a poly-phase electrical system, wherein said grid islanding event comprises disconnecting one or more sources of electrical generation from an electrical grid;
- and
- switching on, in response to the detected grid islanding event, an impedance connected between each phase of the poly-phase electrical system, wherein an overvoltage on the poly-phase electrical system caused by the grid islanding event is limited by said impedance clamping and dividing voltage between individual phases of the poly-phase electrical system.
A system for overvoltage protection of a poly-phase electrical system, comprising:
- one or more impedance elements;
- one or more switches in series with the one or more impedance elements;
- and
- a controller, wherein said controller is configured to:
- receive an indication of a detection of an overvoltage condition on an electrical system resulting from islanding of one or more sources of electrical generation from an electrical grid by detecting when a voltage on the electrical system meets or exceeds a voltage threshold value;
- and
- cause the one or more switches to connect the one or more impedance elements between individual phases of the poly-phase electrical system of the electrical system in response to receiving the indication of the detected overvoltage condition, wherein said overvoltage condition is limited by said one or more impedance elements clamping and dividing voltage on the electrical system.
4 more elements
Dependencies are inferred from the claim text.