Electricity: power supply or regulation systems – For phase shift or control – Using impedance
Patent
1993-04-19
1995-05-30
Stephan, Steven L.
Electricity: power supply or regulation systems
For phase shift or control
Using impedance
323352, G05F 100
Patent
active
054204950
ABSTRACT:
A transmission line power flow control system and method selectively reverses power flow direction and controls power flow level over a transmission line. A capacitor having a variable capacitive impedance is selectively inserted in series with the line. The capacitor has a maximum capacitive impedance magnitude which exceeds the magnitude of the inductive impedance of the transmission line. A switching device in parallel with the capacitor inserts and removes the capacitor from the line. The capacitor maybe inserted and removed in a stepwise fashion using several modules, or in a gradual fashion by using inductors in series with the modular switching devices. In response to measurements of power flow parameters, such as line current and line to ground voltages, a controller controls the switching device(s) to selectively vary the net impedance of the transmission line to control the direction and magnitude of power flow therethrough.
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Electric Power Research Institute Inc.
Riley Shawn
Stephan Steven L.
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