Transmission line power controller with a continuously controlla

Electricity: power supply or regulation systems – For reactive power control – Using converter

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363 39, 363 40, 307105, 323212, G05F 500

Patent

active

057342571

ABSTRACT:
A transmission line power controller for controlling the flow of electric power in an alternating current three-phase transmission system is described. The power line controller includes a parallel inverter connected to a series inverter through a dc link. The parallel inverter is connected in shunt to the transmission system through a shunt transformer. The series inverter is connected in series with the transmission system through a series transformer. A transmission line power control circuit is used to specify a desired real power demand and reactive power demand for the transmission system. The power control circuit processes this information along with a transmission line voltage vector and a transmission line current vector to produce a voltage source reference signal that is applied to the series inverter. In response to the voltage source reference signal, the series inverter produces an injected voltage vector into the transmission system. The injected voltage vector forces the transmission line current vector to a desired value corresponding to the specified real power and reactive power demand. Thus, desired real power and reactive power flow is rapidly achieved on the transmission system.

REFERENCES:
patent: 4752726 (1988-06-01), Aoyama
patent: 5138247 (1992-08-01), Tanoue et al.
patent: 5343139 (1994-08-01), Gyugyi et al.

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