POWER FLOW CONTROLLER WITH DC-TO-DC CONVERTER LINKING SHUNT AND SERIES CONNECTED INVERTERS

摘要

A unified power flow controller has a dc-to-dc converter which uses the dcvoltage produced by a first static inverter, connected in shunt with atransmission line and providing parallel reactive compensation, to establishthe magnitude of a series compensation voltage injected into the transmissionline by a second static inverter. The second static inverter then only has toregulate the phase angle of the series injected voltage. With the dc-to-dcconverter turned off, the two inverters are decoupled and can be operatedindependently even if the other inverter is not operational.