Title:
高調波電流補償装置
Document Type and Number:
Japanese Patent JP5253523
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a harmonic current compensation device that can improve reliability of harmonic compensation by implementing stable control even when unbalance is generated in an alternating-current power supply.SOLUTION: A harmonic current compensation device 7 comprises: an arm part 18; shunt resistors 12a to 12c detecting three-phase AF current; load current detectors 15a and 15c detecting two-phase load current; a power supply voltage detector 14 detecting one line voltage of an alternating-current power supply 1; and a compensation control part 16 performing compensation control of harmonic current based on the two-phase load current, the line voltage, and the three-phase AF current. The compensation control part 16 generates a two-phase AF current instruction based on the two-phase load current; calculates an amount showing an extent of unbalance by detecting an unbalance state of the alternating-current power supply 1 based on the two-phase AF current instruction, the line voltage, and the three-phase AF current; and, subsequently, generates three-phase power supply voltage according to the unbalance state from the amount showing the extent of unbalance and the line voltage.
Inventors:
Yosuke Shinomoto
Takuya Shimoda
Shinsaku Kusube
Hashimoto Akinori
Kenta Yuasa
Takuya Shimoda
Shinsaku Kusube
Hashimoto Akinori
Kenta Yuasa
Application Number:
JP2011000254A
Publication Date:
July 31, 2013
Filing Date:
January 04, 2011
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02J3/01; H02M1/12
Domestic Patent References:
| JP10304568A | ||||
| JP11143562A | ||||
| JP2000102168A | ||||
| JP2003079159A |
Attorney, Agent or Firm:
Hiroaki Sakai