POWER CONVERSION APPARATUS, GRID CONNECTION APPARATUS, AND GRID CONNECTION SYSTEM

WIPO Patent Application WO/2011/090210

A1

A power conversion apparatus is provided with a step-up chopper circuit (2) that steps-up an input voltage (Vi) from a distributed power supply, an inverter circuit (3) that converts the output voltage (Vd) of the step-up chopper circuit (2) into alternating current, a first control circuit (voltage detector (PT), error calculator (21), and output voltage controller (22)) for controlling the output voltage (Vd), and a second control circuit (current detector (DCT), error calculator (31), input current controller (32), and PWM comparator (33)) for controlling the chopper input current (Ii). The first control circuit generates a target current value (Ir) so as to make the output voltage (Vd) become a target output voltage value (Vr). The second control circuit controls the step-up chopper circuit (2) so as to make the chopper input current (Ii) become the target current value (Ir). The first control circuit also has a low-pass filter (23a) that removes ripple components included in the output voltage (Vd).

JP2002233138	SWITCHING POWER SUPPLY UNIT
JP2011083120	SWITCHING REGULATOR
JP2003274643	DC VOLTAGE TRANSDUCER

YONEDA, Fumiiki (())

JP2011/051359

July 28, 2011

January 25, 2011

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SANYO ELECTRIC CO., LTD. (5-5 Keihan-Hondori 2-chome, Moriguchi-shi Osaka, 77, 〒5708677, JP)
三洋電機株式会社 (〒77 大阪府守口市京阪本通２丁目５番５号 Osaka, 〒5708677, JP)

H02M3/155; G05F1/67; H02M7/48

TERAYAMA, Keishin et al. (Toranomon Kotohira Tower 2-8, Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)

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