High speed protection of power transmission lines
AssigneeABB Power Grids Switzerland AG
InventorReynaldo Nuqui
Life of this patent
Estimating the term…
Abstract
The present application is directed to a three phase power transmission system including a first conductor line, a second conductor line and a third conductor line. One or more sensors are configured to detect traveling waves in each of the first second and third conductors. A controller is configured to receive data transmitted by the one or more sensors and determine which of the traveling modal waves is a first metallic mode wave (MM1), a second metallic mode (MM2) wave and/or a ground mode (GM0) wave. The controller is operable to determine which of the conductor lines are faulted based on detection of one or more of MM1 waves, MM2 waves and/or GM0 waves.
Claims20
A system comprising:
- a three phase power transmission system including a first conductor line, a second conductor line and a third conductor line;
- one or more sensors configured to detect traveling waves in each of the first second and third conductors;
- a controller operable for receiving data transmitted by the one or more sensors and determining which of the traveling modal waves is a first metallic mode wave, a second metallic mode wave and/or a ground mode wave;
- and
- wherein the controller is operable to determine which of the conductor lines are faulted based on detection of one or more of first metallic mode waves, second metallic mode waves and/or ground mode waves.
A method comprising:
- sensing a current traveling wave in a first conductor line, a second conductor line and a third conductor line of a three phase system;
- determining whether the current traveling wave is moving in a forward direction in the first conductor line, the second conductor line and the third conductor line;
- sensing a voltage traveling wave in the first conductor line, the second conductor line and the third conductor line;
- and
- shutting electrical power off to any of the conductor lines after detecting that the current traveling wave moving in the forward direction and the voltage traveling wave exceeds a predetermined threshold value.
A system comprising:
- first, second and third electrical conductor lines;
- one or more sensors configured to sense a voltage and a current flowing through the first, second and third electrical conductor lines;
- a controller in electrical communication with the one or more sensors;
- wherein the controller is operable to identify a first metallic mode wave, a second metallic mode wave and a ground mode wave generated by a fault in any of the first, second and third electrical conductor lines;
- and
- wherein the controller is further configured shut electrical power off to one or more of the first, second or third conductors when a metallic mode 1 traveling wave is detected.
Dependencies are inferred from the claim text.