JPS56125965A - Protection of ac-dc converter - Google Patents

Protection of ac-dc converter

Info

Publication number
JPS56125965A
JPS56125965A JP2808580A JP2808580A JPS56125965A JP S56125965 A JPS56125965 A JP S56125965A JP 2808580 A JP2808580 A JP 2808580A JP 2808580 A JP2808580 A JP 2808580A JP S56125965 A JPS56125965 A JP S56125965A
Authority
JP
Japan
Prior art keywords
circuit
operating
gate
power
power rectifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2808580A
Other languages
Japanese (ja)
Inventor
Takami Sakai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2808580A priority Critical patent/JPS56125965A/en
Publication of JPS56125965A publication Critical patent/JPS56125965A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To enable to prevent the dielectric breakdown of a DC cable by a method wherein a gate is blocked at an instant when a short-circuit trouble takes place during a power rectifier is operating, and the gate is shifted and then is blocked after the prescribed time when a trouble takes place during a power inverter is operating. CONSTITUTION:AC overcurrent detecting circuit 51D and differential current detecting circuit 51DA to be operated when an alternating current is larger than a direct current are provided respectively to the power rectifier and the power inverter, the set value of the circuit 51D is made to be a value as to operate when an arm short-circuit takes place during the power rectifier is operating and as not to respond to a short-circuit during the power rectifier is operating, and the set value of the circuit 51DA is made to contrary to the value mentioned above. The gate of the power rectifier is blocked (GB) at an instant when the circuit 51D is operating through a time relay 10, OR circuits 11, 12, and the gate in the power inverter is shifted when the circuit 51DA is operating and GB is performed after the prescribed time, and corresponding circuit-breakers are respectively cut off. Accordingly, instant GB during the operation of the power inverter is avoided, and the dielectric breakdown of the DC cable to be caused by DC overvoltage or overcurrent can be prevented.
JP2808580A 1980-03-07 1980-03-07 Protection of ac-dc converter Pending JPS56125965A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2808580A JPS56125965A (en) 1980-03-07 1980-03-07 Protection of ac-dc converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2808580A JPS56125965A (en) 1980-03-07 1980-03-07 Protection of ac-dc converter

Publications (1)

Publication Number Publication Date
JPS56125965A true JPS56125965A (en) 1981-10-02

Family

ID=12238936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2808580A Pending JPS56125965A (en) 1980-03-07 1980-03-07 Protection of ac-dc converter

Country Status (1)

Country Link
JP (1) JPS56125965A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021027646A (en) * 2019-08-01 2021-02-22 東芝三菱電機産業システム株式会社 Controller and power conversion system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944218A (en) * 1972-09-06 1974-04-25
JPS5219237A (en) * 1975-08-06 1977-02-14 Toshiba Corp Protection relay device for conversion circuits

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944218A (en) * 1972-09-06 1974-04-25
JPS5219237A (en) * 1975-08-06 1977-02-14 Toshiba Corp Protection relay device for conversion circuits

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021027646A (en) * 2019-08-01 2021-02-22 東芝三菱電機産業システム株式会社 Controller and power conversion system

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