CONTROL APPARATUS OF DC POWER COUPLING SYSTEM

摘要

A coupling system in which power converters are coupled throughla DC circuit to exchange active power between the converters comprises a control apparatus for controlling active power exchanged between each converter and its AC system. The control apparatus includes an automatic active power regulator for (910) regulating active power exchanged between the converters (110, 210) and the AC system (100, 200) to be equal to a predetermined active power reference value (Pdp), and an automatic DC voltage regulator (920) for regulating a DC voltage (Ed) of the DC circuit to be equal to a predetermined DC voltage reference value (Edp). When an output signal (PAPR) from the automatic active power regulator (910) of each converter is input as an upper limit value of an output signal from the automatic DC voltage regulator (920), a DC voltage reference value (Edp1) of one converter (110) is set to be equal to or larger than a DC voltage reference value (Edp2) of the remaining power converter (210) (Edp1 >/= Edp2).