Title:
POWER CONVERTER FOR SYSTEM INTERCONNECTION
Document Type and Number:
Japanese Patent JP2018082570
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To make power factor constant control and accurate detection of independent operation compatible, in a power converter for system interconnection.SOLUTION: The delay time and convergence time of a second PI controller for use in feedback control of wattless current are set shorter than the delay time and convergence time of a first PI controller for use in feedback control of constant power factor (constant power factor control). More specifically, responsiveness of feedback control processing of the wattless current control circuit is made faster than that of the constant power factor control circuit. With such an arrangement, when independent operation state occurs, the wattless current control circuit can complete feedback control for outputting a wattless current reflecting the wattless power injection amount with high possibility, before a new reactive power control value for constant power factor control is outputted from the constant power factor control circuit. Consequently, interference of reactive current feedback control processing, and constant power factor control processing is decreased, and constant power factor control and accurate detection of independent operation can be made compatible.SELECTED DRAWING: Figure 11
More Like This:
Inventors:
LUNG CHIENRU
HIDAKA HIDEKI
HIDAKA HIDEKI
Application Number:
JP2016223650A
Publication Date:
May 24, 2018
Filing Date:
November 16, 2016
Export Citation:
Assignee:
TABUCHI DENKI KK
International Classes:
H02J3/38; H02J3/16; H02J3/18; H02J3/32; H02M7/48
Domestic Patent References:
| JP2016127727A | 2016-07-11 | |||
| JPH1141819A | 1999-02-12 | |||
| JP2015180122A | 2015-10-08 | |||
| JP2006067760A | 2006-03-09 |
Attorney, Agent or Firm:
Yasuo Itaya
Shinichi Mizuta
Itaya Masayuki
Shinichi Mizuta
Itaya Masayuki