CONTROL DEVICE FOR ELECTRIC-POWER CONVERTER, AND ELECTRIC-POWER CONVERTER

PROBLEM TO BE SOLVED: To provide a control device for an electric-power converter which can cope with unbalance failure by changing characteristic of filters for extracting negative-phase-sequence voltage in steady operation and in the system failure, and the electric power converter. SOLUTION: The...

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Bibliographische Detailangaben
1. Verfasser:	OGUSA SHINICHI
Format:	Patent
Sprache:	eng
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 GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION PHYSICS REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION REGULATING SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES SYSTEMS FOR STORING ELECTRIC ENERGY TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a control device for an electric-power converter which can cope with unbalance failure by changing characteristic of filters for extracting negative-phase-sequence voltage in steady operation and in the system failure, and the electric power converter. SOLUTION: The control device for the electric-power converter is provided with a three- phase two-phase converter 11 which converts three-phase AC voltage of the electric-power converter to two-phase voltage; a positive-phase-sequence-component extracting device 13 which extracts positive-phase-sequence component from the two-phase voltage; a negative- phase-sequence-component extracting device 14, which has first and second negative-phase- sequence-component extracting filters having respectively different extraction capabilities, extracts negative-phase-sequence component from the two-phase voltage using the first negative-phase-sequence-component extracting filter in steady operation, and extracts the negative-phase-sequence component from the two-phase voltage using the second negative- phase-sequence-component extracting filter in transient operation; and a control-signal generating device 15 which generates a control signal, based on the positive-phase-sequence component extracted by the positive-phase-sequence-component extracting device 13 and the negative- phase-sequence component extracted by the negative-phase-sequence-component extracting device 14.