METHOD FOR MAINS FEEDBACK OF A LINE COMMUTATED DIRECT CONVERTER AND CONTROL CIRCUIT THEREFOR

1. A method for reducing main feedback from a line-commutated direct converter (I, II) when connected to a three-phase mains supply (R, S, T), by modulating a controllable reactive power compensator (5, 6, 7) connected to the three-phase mains, characterised in that the theoretical value (i*B ) for...

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Bibliographische Detailangaben
1. Verfasser:	SALZMANN, THEODOR
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION THEREOF CONTROLLING CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PHYSICS REGULATING SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	1. A method for reducing main feedback from a line-commutated direct converter (I, II) when connected to a three-phase mains supply (R, S, T), by modulating a controllable reactive power compensator (5, 6, 7) connected to the three-phase mains, characterised in that the theoretical value (i*B ) for the control (8) of the reactive current to be supplied by the reactive power compensator is formed independently of the actual value of the reactive current, from the product ( iA . cos psi = iq1 ) of the amount of the direct converter output current (iA ) and a predetermined function (cos psi) of the direct converter control angle (psi) derived from the control voltage (UST ) of the direct converter (I, II) or from the direct converter output voltage (Ua ) (Figure 1).