US2532108A - Static current converter with means for putting it out of function - Google Patents

Static current converter with means for putting it out of function Download PDF

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Publication number
US2532108A
US2532108A US748810A US74881047A US2532108A US 2532108 A US2532108 A US 2532108A US 748810 A US748810 A US 748810A US 74881047 A US74881047 A US 74881047A US 2532108 A US2532108 A US 2532108A
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United States
Prior art keywords
valves
converter
valve
putting
function
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.)
Expired - Lifetime
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US748810A
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English (en)
Inventor
Lamm Uno
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ABB Norden Holding AB
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ASEA AB
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Filing date
Publication date
Application filed by ASEA AB filed Critical ASEA AB
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Publication of US2532108A publication Critical patent/US2532108A/en
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    • 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
    • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
    • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
    • H02M7/046—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1209—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for converters using only discharge tubes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
    • H02H7/127—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers having auxiliary control electrode to which blocking control voltages or currents are applied in case of emergency

Definitions

  • bypass valve path is therefore created by the use of one or more of the main valves of the converter in such a connection that no substantial voltage originating from the alternating current side forms part of the current path.
  • the opening of such a bypass path may especially be advisable as a preparatory step to put the converter entirely out of function by other means.
  • valves forming part of the bypass path with separate cathodes, i. e. to make them of what is generally referred to as a monanodic type, which however, also comprises valve vessels having several anodes of the same polarity in parallel, such as are used for instance for high currents.
  • the invention is preferably applicable to twoway connected converters, because in these there are always valve paths between the direct current terminals, which do not contain any transformer winding complicating the connection.
  • two series-connected valves coupled to the same alternating current terminal form together the bypass path.
  • Two valves connected in this way are as is known never simultaneously conducting in normal operation.
  • valves serving as bypass valves are selected beforehand, which may for instance be the case if the operation is intended to be made without a preceding disturbance, only the other valves are blocked, for instance by ceasing the sending of releasing impulses to them. In some cases, all such releasing impulses are suspended and special releas- 7 ing impulses are sent to the valves intended to serve as bypass valves.
  • a failure of commutation i. e. either a failing ignition of the valve in turn to be ignited or a failing extinction of the previously burning valve. If such a failure de-- pends on conditions outside the inverter, for instance on disturbances in the alternating current network fed thereby, it is, as a rule, arbitrary which pair of valves is selected to form the bypass path, although it is often most convenient to use the unduly burning valve and the valve opposite thereto for this purpose. The only step necessary may then be to cause the unduly burning valve to send a releasing impulse to the opposite one, while all the other valves are blocked. If, on the contrary, the missing commutation depends on such a defect in a valve or its control apparatus that the valve cannot be blocked, it is necessary to cause this valve to continue to burn,
  • FIGs. 1 and 2 show diagrammatically two forms of the invention, one of these being applied to a back-arcing rectifier and the other on an inverter with a failure of commutation.
  • a static current converter having a plurality of valves which are normally alternately blocked during one part of the cycle of operation and released during another part, means responsive to an abnormal disturbing condition likely to result in failure of operation of the converter to release at least one of said valves during the normal blocking part of its cycle to form a by-pass valve path for said converter containing substantially no voltage derived from the alternating current side of the converter.
  • valves have separate cathodes.
  • a static current converter having a plurality of valves connected in pairs in series to the same alternating current terminals which are normally alternately blocked during one part of the cycle of operation and released during another part, means responsive to an abnormal disturbing condition likely to result in failure of operation of the converter to release at least two of said valves connected in series during the normal blocking part of the cycle of one of said valves to form a bypass valve path for direct current.
  • a device as claimed in claim 3 in which one of said valves is one in which the commutation has failed.
  • said means also blocking the remaining valves of the converter during parts of their cycles in which they are normally released,
  • means for normally transmitting periodic releasing impulses to said valves so that said valves are normally blocked during one part of the cycle of operation and released during another part means responsive to an abnormal disturbing condition likely to result in failure of operation of the converter to render said first means inoperative and to send a special releasing impulse to some of said valves to form a bypass valve path.
  • a static current converter having a, plurality of ionic valves which are normally blocked during one part of the cycle of operation and released during another part, means responsive to an abnormal disturbing condition likely to result in failure of operation of the converter to transmit blocking impulses to all said valves and to send a special releasing impulse to some of said valves to form a bypass valve path.
  • said means including biassed current transformers in series with some of said valves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
US748810A 1946-05-25 1947-05-17 Static current converter with means for putting it out of function Expired - Lifetime US2532108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE267209X 1946-05-25

Publications (1)

Publication Number Publication Date
US2532108A true US2532108A (en) 1950-11-28

Family

ID=20306647

Family Applications (1)

Application Number Title Priority Date Filing Date
US748810A Expired - Lifetime US2532108A (en) 1946-05-25 1947-05-17 Static current converter with means for putting it out of function

Country Status (4)

Country Link
US (1) US2532108A (fr)
CH (1) CH267209A (fr)
DE (1) DE911513C (fr)
FR (1) FR947211A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3622862A (en) * 1970-10-22 1971-11-23 Asea Ab By-pass connection of static converters
US3641356A (en) * 1970-02-19 1972-02-08 Asea Ab Static converter station for high voltage
US3842335A (en) * 1972-05-18 1974-10-15 Asea Ab Static current converter with bypass members
JPS5027033A (fr) * 1973-07-11 1975-03-20
US3887860A (en) * 1972-11-15 1975-06-03 Eaton Corp Fuseless inverter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2064021A (en) * 1934-10-11 1936-12-15 Westinghouse Electric & Mfg Co Electrical conversion system
US2119865A (en) * 1934-10-22 1938-06-07 Asea Ab Protecting means for ionic valves

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2064021A (en) * 1934-10-11 1936-12-15 Westinghouse Electric & Mfg Co Electrical conversion system
US2119865A (en) * 1934-10-22 1938-06-07 Asea Ab Protecting means for ionic valves

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641356A (en) * 1970-02-19 1972-02-08 Asea Ab Static converter station for high voltage
US3622862A (en) * 1970-10-22 1971-11-23 Asea Ab By-pass connection of static converters
US3842335A (en) * 1972-05-18 1974-10-15 Asea Ab Static current converter with bypass members
US3887860A (en) * 1972-11-15 1975-06-03 Eaton Corp Fuseless inverter
JPS5027033A (fr) * 1973-07-11 1975-03-20

Also Published As

Publication number Publication date
CH267209A (fr) 1950-03-15
DE911513C (de) 1954-05-17
FR947211A (fr) 1949-06-27

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