You need JavaScript to view this

Power conditioner without isolation transformer; Toransuresu power conditioner no shohin kaihatsu

Abstract

A light-weight downsized and high efficiency transformer-less type 4 kW power conditioner (inverter) has been developed. This power conditioner insures the system interconnection protection by monitoring the voltage of two single-phase three-line circuits. The power conditioner has weight of 17.5 kg and efficiency of 94%. Potential fluctuation of photovoltaic cells due to the switching of power devices at the inverter was reduced. Output capacity was reduced in the low input voltage range. Outflow of DC component was prevented in high accuracy by usually correcting the zero point drift of detector, and by using the current detector with excellent linearity. To detect the DC ground fault, and to trip the output side breaker locating at the ground fault current pass, a zero phase converter detection circuit has been developed, by which the DC component can be detected at the DC input side. As a result of performance verification, the efficiency, power factor, EMI level, protection of outflow of DC component, protection of ground fault, protection of single operation detection, and noise level were satisfied. This system is prospective for the diffusion of photovoltaic power generation in the future. 3 refs., 8 figs., 1 tab.
Authors:
Okado, C; Itami, T; Kimoto, K [1] 
  1. Toshiba Corp., Tokyo (Japan)
Publication Date:
Oct 27, 1996
Product Type:
Conference
Report Number:
CONF-9610295-
Reference Number:
SCA: 140600; 200000; PA: NEDO-96:915435; EDB-97:071990; SN: 97001782978
Resource Relation:
Conference: JSES/JWEA joint conference (1996), 1996 nendo nihon taiyo energy gakkai nihon furyoku energy kyokai godo kenkyu happyokai, Yamagata (Japan), 31 Oct - 1 Nov 1996; Other Information: PBD: 27 Oct 1996; Related Information: Is Part Of Proceedings of JSES/JWEA Joint Conference (1996); PB: 406 p.; Taiyo/furyoku energy koen ronbunshu (1996)
Subject:
14 SOLAR ENERGY; 20 FOSSIL-FUELED POWER PLANTS; INVERTERS; PHOTOVOLTAIC POWER PLANTS; COMMERCIALIZATION; INTERCONNECTED POWER SYSTEMS; NOISE POLLUTION ABATEMENT; EQUIPMENT PROTECTION DEVICES; ELECTRIC GROUNDS; ELECTRIC CURRENTS; SWITCHES; AMMETERS; POWER FACTOR
OSTI ID:
472728
Research Organizations:
Japan Solar Energy Society, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97744185; TRN: 96:915435
Availability:
Available from Japan Solar Energy Society, 44-14, Yoyogi 2-chome, Shibuya-ku, Tokyo, Japan; OSTI as DE97744185
Submitting Site:
NEDO
Size:
pp. 29-32
Announcement Date:

Citation Formats

Okado, C, Itami, T, and Kimoto, K. Power conditioner without isolation transformer; Toransuresu power conditioner no shohin kaihatsu. Japan: N. p., 1996. Web.
Okado, C, Itami, T, & Kimoto, K. Power conditioner without isolation transformer; Toransuresu power conditioner no shohin kaihatsu. Japan.
Okado, C, Itami, T, and Kimoto, K. 1996. "Power conditioner without isolation transformer; Toransuresu power conditioner no shohin kaihatsu." Japan.
@misc{etde_472728,
title = {Power conditioner without isolation transformer; Toransuresu power conditioner no shohin kaihatsu}
author = {Okado, C, Itami, T, and Kimoto, K}
abstractNote = {A light-weight downsized and high efficiency transformer-less type 4 kW power conditioner (inverter) has been developed. This power conditioner insures the system interconnection protection by monitoring the voltage of two single-phase three-line circuits. The power conditioner has weight of 17.5 kg and efficiency of 94%. Potential fluctuation of photovoltaic cells due to the switching of power devices at the inverter was reduced. Output capacity was reduced in the low input voltage range. Outflow of DC component was prevented in high accuracy by usually correcting the zero point drift of detector, and by using the current detector with excellent linearity. To detect the DC ground fault, and to trip the output side breaker locating at the ground fault current pass, a zero phase converter detection circuit has been developed, by which the DC component can be detected at the DC input side. As a result of performance verification, the efficiency, power factor, EMI level, protection of outflow of DC component, protection of ground fault, protection of single operation detection, and noise level were satisfied. This system is prospective for the diffusion of photovoltaic power generation in the future. 3 refs., 8 figs., 1 tab.}
place = {Japan}
year = {1996}
month = {Oct}
}