Inverter controlled series compensator
First Claim
1. Apparatus for providing series compensation in an ac electrical power transmission system having a transmission line carrying an ac current at a selected transmission line voltage and fundamental frequency, said apparatus comprising:
- a reactive impedance element connected in series in said ac transmission line;
switching power converter means generating an alternating voltage at said fundamental frequency with controllable magnitude and controllable phase angle;
means connecting said switching power converter means in parallel with said reactive impedance element to impress said alternating voltage across said reactive impedance element and thereby control flow of said current through said transmission line; and
control means controlling said controllable magnitude and said controllable phase angle of said alternating voltage to control said current.
3 Assignments
0 Petitions
Accused Products
Abstract
An Inverter-Controller Series Compensator (ICSC) has a reactive impedance element connected in series with the line of an ac transmission system and an inverter connected in parallel with the reactive impedance element to control the voltage across, and therefore the current through, the reactive impedance element to provide a continuously adjustable series reactance for power flow control, series voltage regulation, oscillation damping and stability enhancement, as needed. By providing the inverter with a source/sink of real power, the ICSC is further capable of adjusting series impedance. The reactive impedance element can be either a capacitive element or an inductive element depending upon whether there is a need for capacitive or inductive compensation.
-
Citations
13 Claims
-
1. Apparatus for providing series compensation in an ac electrical power transmission system having a transmission line carrying an ac current at a selected transmission line voltage and fundamental frequency, said apparatus comprising:
-
a reactive impedance element connected in series in said ac transmission line; switching power converter means generating an alternating voltage at said fundamental frequency with controllable magnitude and controllable phase angle; means connecting said switching power converter means in parallel with said reactive impedance element to impress said alternating voltage across said reactive impedance element and thereby control flow of said current through said transmission line; and control means controlling said controllable magnitude and said controllable phase angle of said alternating voltage to control said current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
Specification