Title:
CONTROLLER OF AC/DC CONVERTER
Document Type and Number:
Japanese Patent JPS6026469
Kind Code:
A
Abstract:
PURPOSE:To enhance the reliability of a power system by inserting an impedance element to an AC/DC converter side and shortcircuiting it when a defect occurs during the reverse conversion time. CONSTITUTION:An AC/DC converter 1 is connected to a DC transmission system 4, and connected to an AC transmission system 3 with the converter as a reverse or normal converting operation. In this case, an impedance element 10 is inserted between the AC terminal side of the converter 1 and the bulb winding side of a transformer 2, and a bidirectional semiconductor switch 15 is connected in parallel with the element. The switch 15 is conducted by a firing signal from a firing controller 300. The conduction conducts the switch 15 by inputting an operation mode signal IVN and a signal of a defect detector 200 for detecting the occurrence of a ground-fault defect F in the system 3 through an AND element A1 to the controller 300 when the converter 1 inverts. Thus, the reactor 10 is shortcircuited, and the commutation impedance is reduced from the forward converting operation time.
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Inventors:
UEDA HIROSHI
Application Number:
JP13710383A
Publication Date:
February 09, 1985
Filing Date:
July 25, 1983
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02J5/00; H02M7/48; (IPC1-7): H02J5/00
Attorney, Agent or Firm:
Masuo Oiwa