Dynamic voltage restoration system and method

摘要

A system, in one embodiment, includes a voltage fault detection system. The voltage fault detection system may be configured to acquire a reference voltage signal from a power line to determine if a voltage sag condition is present in the power line, determine a correction voltage for correcting the voltage sag condition, use the reference voltage to produce the correction voltage, and apply the correction voltage to the power line.

主权项

1. A voltage detection system, for correcting a voltage sag on a power transmission line, comprising:
data acquisition logic configured to acquire a reference voltage signal generated from a reference voltage produced from the power line; correction logic configured to (i) determine, based on the reference voltage signal, a correction voltage, (ii) generate, based on the correction voltage, a correction voltage signal, and (iii) communicate to the power line the correction voltage signal such that the correction voltage corrects the voltage sag on the power transmission line; a shunt transformer comprising a first shunt primary winding, a second shunt primary winding, a third shunt primary winding, a first shunt secondary winding, a second shunt secondary winding, and a third shunt secondary winding, each of the shunt primary windings being in electrical connection with the power transmission line and in electrical connection, at two locations, with remaining shunt primary windings of the first, second, and third shunt primary windings, each of the shunt primary windings receiving the reference voltage, and each of the shunt secondary windings being grounded; a series transformer comprising a first series primary winding, a second series primary winding, a third series primary winding, a first series secondary winding, a second series secondary winding, and a third series secondary winding, wherein the first series primary winding is in electrical connection with the first shunt secondary winding and ground, the second series primary winding is in electrical connection with the second shunt secondary winding and ground, the third series primary winding is in electrical connection with the third shunt secondary winding and ground, and each of the series secondary windings is in electrical connection with the power transmission line, and each of the secondary windings communicates the correction voltage to the power transmission line; and a feedback loop between the correction logic and the data acquisition logic, the data acquisition logic being configured to prevent the voltage system from applying the correction voltage on the power line when the voltage sag has recovered.