Use of the unused duration injection units in an array to reduce oscillations during impedance injection for corrections of problems
AssigneeSmart Wires Inc.
InventorsAntonio Ginart, Michael T. Garrison Stuber, Haroon Inam, Shreesha Adiga Manoor
Life of this patent
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Abstract
A control module controls impedance injection units (IIUs) to form multiple connection configurations in sequence. Each connection configuration has one IIU, or multiple IIUs in series, parallel or combination of series and parallel. The connection configurations of IIUs are coupled to a high-voltage transmission line. The control module and the IIUs generate rectangular impedance injection waveforms. When the waveforms are combined and injected to the high-voltage transmission line, this produces a pseudo-sinusoidal waveform.
Claims21
A method of operating an impedance injection module (IIM) comprising a plurality of flexible alternating current transmission system (FACTS) based impedance injection units (IIUs), the method comprising:
- controlling, by a control module of the IIM, the plurality of FACTS based IIUs of the IIM forming multiple connection configurations in sequence, each connection configuration comprising multiple FACTS based IIUs in series, parallel or combination thereof, wherein the IIM is coupled to a transmission line;
- generating, by the plurality of FACTS based IIUs through the multiple connection configurations, a plurality of synchronized rectangular impedance injection waveforms that, when injected into the transmission line, are combined to produce a pseudo-sinusoidal impedance waveform;
- injecting the generated synchronized rectangular impedance injection waveforms into the transmission line and controlling power flow in the transmission line using the pseudo-sinusoidal impedance waveform;
- and
- generating and injecting into the transmission line one or more short duration pulses by at least one FACTS based IIU that is not being utilized during that period of generating the synchronized rectangular impedance injection waveforms.
An impedance injection system comprising one or more impedance injection modules (IIMs), the impedance injection system comprising:
- a plurality of flexible alternating current transmission system (FACTS) based impedance injection units (IIUs) of an IIM;
- and
- a control module to:
- direct the plurality of FACTS based IIUs of the IIM to form connection configurations in sequence, with each connection configuration comprising multiple FACTS based IIUs connected in series, parallel or combination thereof, wherein the IIM is coupled to a transmission line;
- generate, through the connection configurations of the plurality of FACTS based IIUs in the sequence, synchronized rectangular impedance injection waveforms to combine and inject into the transmission line, to produce a pseudo-sinusoidal impedance waveform on the transmission line, to control power flow in the transmission line;
- and
- generate, through the connection configurations of one or more of the plurality of FACTS based IIUs, during an unused period in the sequence, one or more short duration pulses to be combined with the synchronized rectangular impedance injection waveforms and injected into the transmission line to correct a sensed disturbance on the transmission line.
A non-transitory, computer-readable media having instructions therein, which when executed by a processor, cause the processor to:
- direct a plurality of flexible alternating current transmission system (FACTS) based impedance injection units (IIUs) of an impedance injection module (IIM) to form connection configurations in sequence, with each connection configuration comprising multiple IIUs connected in series, parallel or combination thereof, wherein the IIM is coupled to a transmission line;
- generate, through the connection configurations of FACTS based IIUs in the sequence, synchronized rectangular impedance injection waveforms to combine and inject into the transmission line, to produce a pseudo-sinusoidal impedance waveform on the transmission line to control power flow in the transmission line;
- and
- generate, through the connection configurations of FACTS based IIUs, during an unused period in the sequence, one or more short duration pulses to be injected into the transmission line to correct a sensed disturbance on the transmission line.
Dependencies are inferred from the claim text.