Distribution line clamp force using DC bias on coil
First Claim
1. A method of monitoring a power grid distribution network, comprising the steps of:
- harvesting energy from a conductor line of the power grid distribution network with a split-core transformer of a monitoring device installed on the conductor line;
powering the monitoring device with the harvested energy; and
applying a DC bias to the split-core transformer to maintain a net positive magnetic force between first and second core halves of the split-core transformer.
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Accused Products
Abstract
A power distribution monitoring system is provided that can include a number of features. The system can include a plurality of monitoring devices configured to attach to individual conductors on a power grid distribution network. In some embodiments, a monitoring device is disposed on each conductor of a three-phase network and utilizes a split-core transformer to harvest energy from the conductors. The monitoring devices can be configured to harvest energy from the AC power grid and apply a DC bias to core halves of the split-core transformer to maintain a positive magnetic force between the core halves. Methods of installing and using the monitoring devices are also provided.
173 Citations
14 Claims
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1. A method of monitoring a power grid distribution network, comprising the steps of:
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harvesting energy from a conductor line of the power grid distribution network with a split-core transformer of a monitoring device installed on the conductor line; powering the monitoring device with the harvested energy; and applying a DC bias to the split-core transformer to maintain a net positive magnetic force between first and second core halves of the split-core transformer. - View Dependent Claims (2, 3, 4, 5)
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6. A method of monitoring a power grid distribution network, comprising the steps of:
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installing a split-core transformer of a monitoring device around a conductor line of the power grid distribution network, the split-core transformer having a first core half and a second core half; harvesting energy from the conductor line with the split-core transformer; and during the harvesting energy step, applying a DC bias to the split-core transformer to maintain a net positive magnetic force between the first and second core halves of the split-core transformer. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A power line monitoring device, comprising:
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a split-core current transformer comprising first and second core halves, the split-core transformer being configured to harvest energy from a conductor line of a power grid distribution network to power the power line monitoring device; secondary windings disposed around at least the first core half of the split-core transformer; and a circuit electrically coupled to the secondary windings, the circuit configured to apply a DC bias to the secondary windings to maintain a net positive magnetic force between the first and second core halves. - View Dependent Claims (13, 14)
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Specification