Title:
【発明の名称】系統連系型逆変換装置
Document Type and Number:
Japanese Patent JP3107687
Kind Code:
B2
Abstract:
PURPOSE:To provide a system interconnection type inverted converter, which can perform control so that the current flowing through the neutral conductor of interconnected single-phase three-wire electric paths does not exceed an allowable one and can protect a load from the overvoltage generated on the side of a light load caused by the proportional division of the voltage across both ends of the load based on the load at the time of the separation of the lines of a commercial power supply system. CONSTITUTION:A neutral-conductor-current detector 12 detects the current flowing through a neutral conductor 28. Line voltage detectors 16 and 15 detect line voltages VL1 and VL2. A neutral-conductor overcurrent protection circuit 26 receives the signal from the neutral-conductor-current detector 12 and controls the output of an inverter circuit 7 so that the neutral conductor current does not exceeds the specified value. A sequence protecting circuit 27 receives the signal from the line voltage detectors and opens an interconnected relay 9 when the line voltage exceeds the allowable one. These parts are provided.
Inventors:
Mitsuo Okamoto
Keiji Morimoto
Keiji Morimoto
Application Number:
JP24469893A
Publication Date:
November 13, 2000
Filing Date:
September 30, 1993
Export Citation:
Assignee:
Sharp Corporation
International Classes:
H01L31/04; H02H7/122; H02J3/38; H02M7/48; (IPC1-7): H02J3/38; H01L31/04; H02H7/122; H02M7/48
Domestic Patent References:
| JP6327258A | ||||
| JP638383A | ||||
| JP213230A | ||||
| JP5212444A | ||||
| JP59198878A |
Other References:
【文献】特許2951141(JP,B2)
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)