Transmission line power flow controller
Patent
·
OSTI ID:131960
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 may be 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. 7 figs.
- Assignee:
- Electric Power Research Inst., Palo Alto, CA (United States)
- Patent Number(s):
- US 5,420,495/A/
- Application Number:
- PAN: 8-048,858
- OSTI ID:
- 131960
- Country of Publication:
- United States
- Language:
- English
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