DC FILTER FOR ELECTRIC RAILWAY

PROBLEM TO BE SOLVED: To provide a DC filter for electric railway in which the size and the cost can be reduced, while sufficiently suppressing harmonic components on the feeder line. SOLUTION: The DC filter is employed in a DC substation for electric railway, in order to smooth the waveform of a DC...

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Bibliographische Detailangaben
Hauptverfasser:	NAKASU TERUO, SHIMADA ICHIRO, ONISHI YUTAKA, TSUNAKAWA KUNIO, NISHIKAWA TOSHIAKI, MAEDA HIROSHI, YABE HISAHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PERFORMING OPERATIONS POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES SYSTEMS FOR STORING ELECTRIC ENERGY TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a DC filter for electric railway in which the size and the cost can be reduced, while sufficiently suppressing harmonic components on the feeder line. SOLUTION: The DC filter is employed in a DC substation for electric railway, in order to smooth the waveform of a DC voltage formed through a 12 phase rectifier 22. Leakage impedance of a transformer 20 is utilized as a DC reactor. A first filter branch 11 for absorbing a harmonic component having frequency 12 times that of an AC power supply frequency, and a second branch 12 for absorbing a harmonic component having frequency 24 times that of the AC power supply frequency are provided, while being formed of resonance capacitors 4, 5 and resonance reactors 7, 8.