Temporal Balancing of Electrical Stress on FACTS Devices in FACTS Based Distributed Impedance Injection Units
AssigneeSmart Wires Inc.
InventorsShreesha Adiga Manoor, Michael Thomas Garrison Stuber, Antonio Ginart, Haroon Inam
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Abstract
An impedance injection unit (IIU) system is coupled to a high-voltage (HV) transmission line. The IIUs are activated in sequences of activation in successive time periods. This injects an impedance waveform onto the HV transmission line. The ordering of IIUs in the sequences of activation is repeatedly changed in successive time periods. This equalizes electrical stress across the IIUs used, leading to overall improvement in IIU system lifetimes.
Claims24
An impedance injection unit (IIU) system, comprising:
- a plurality of IIUs;
- and
- a controller, integrated with or coupled to the plurality of IIUs, to:
- activate each of the plurality of IIUs in a sequence of activation in each of a plurality of successive time periods to inject an impedance waveform onto a high voltage (HV) transmission line;
- and
- repeatedly change an ordering of IIUs in the sequence of activation from one of the plurality of successive time periods to a next one of the plurality of successive time periods, to equalize electrical stress across the plurality of IIUs over the plurality of successive time periods.
A method of operating an impedance injection unit (IIU) system, comprising:
- coupling the IIU system to a high voltage (HV) transmission line;
- activating each of a plurality of IIUs in sequences of activation in successive time periods to inject an impedance waveform onto the HV transmission line;
- and
- repeatedly changing an ordering of IIUs in the sequences of activation in the successive time periods, to equalize electrical stress across the plurality of IIUs.
A tangible, non-transient, computer-readable media having instructions thereupon for a processing device to:
- activate each of a plurality of impedance injection units (IIUs) in sequences of activation in successive time periods to inject an impedance waveform onto a high voltage (HV) transmission line;
- and
- repeat changing an ordering of IIUs in the sequences of activation in the successive time periods;
- wherein the sequences of activation and the changing the ordering of IIUs equalizes electrical stress across the plurality of IIUs.
Dependencies are inferred from the claim text.