Title:
電力変換装置
Document Type and Number:
Japanese Patent JP6658012
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a power conversion device capable of promptly detecting system abnormalities even in a case where a synchronization motor is connected with a parallel-type instantaneous-voltage-drop compensator, and a counter-electromotive force is generated.SOLUTION: A power conversion device comprises: a power calculation unit 21 that receives a detection voltage of a power system and a detection load current, and calculates an active power P; and a comparison determination unit 23 that receives the calculated active power P via a low-pass filter 22, compares the active power P with a power setting value Pref that is preliminarily set, and when Pref>P is satisfied, determines that the power system is abnormal, and outputs a cut-off signal SW-off to a high-speed switch 1.SELECTED DRAWING: Figure 1
Inventors:
Hiroshi Kozu
Application Number:
JP2016016811A
Publication Date:
March 04, 2020
Filing Date:
February 01, 2016
Export Citation:
Assignee:
KABUSHIKI KAISHA MEIDENSHA
International Classes:
H02J9/06; H02M7/48
Domestic Patent References:
| JP1303028A | ||||
| JP2013044676A | ||||
| JP3239121A |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Uzawa Hidehisa
Uzawa Hidehisa