GB599435A - Means for controlling power transmissions utilizing an inverter - Google Patents

Means for controlling power transmissions utilizing an inverter

Info

Publication number
GB599435A
GB599435A GB20709/44A GB2070944A GB599435A GB 599435 A GB599435 A GB 599435A GB 20709/44 A GB20709/44 A GB 20709/44A GB 2070944 A GB2070944 A GB 2070944A GB 599435 A GB599435 A GB 599435A
Authority
GB
United Kingdom
Prior art keywords
current
rectifier
inverter
control
grid
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
Application number
GB20709/44A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB599435A publication Critical patent/GB599435A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion 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
    • H02M7/505Conversion 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 using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/51Conversion 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 using devices of a thyratron or thyristor type requiring extinguishing means using discharge tubes only

Landscapes

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

Abstract

599,435. Converting. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. Oct. 25, 1944, No. 20709. Convention date, Oct. 30, 1943. [Class 38 (ii)] A D.C. transmission line receives power at one end through a rectifier comprising a number of series connected units and delivers it through an inverter having grid control so regulated that it acts to keep the current constant when not overcome by another regulating action. Generally, the control will be set to keep the current lower than that determined by the other normal conditions, e.g. the rectifier may be fitted with a current controller. In such a case, the inverter regulator may be so constructed that it cannot reduce the current determined by the rectifier, but can raise the current if it falls below the set value, e.g. when back-arcing occurs in one rectifier unit. The Figure shows an inverter so controlled. Each of six converting vessels 1-6 may have a regulator such as is shown applied to the valve 4. The D.C. current passes through a. transductor 8 and varies the current supplied from an A.C. source 9 to a rectifier 10, the D.C. output from which is compared with a standard current from source 13 obtained as described, for example, in Specification 479,834, the difference current passing between points 11, 12 through winding 14 of another transductor. The inductance of winding 15 is thus varied to shift the phase of the supply to the grid of vessel 4 from the junction between inductance 15 and resistance 16 which are connected in series across a potentiometer 17. A unidirectional conductor 19 is connected in series with winding 14 so that while the grid potential may be varied to raise the main D.C. load current to a predetermined value, it cannot be varied to lower the D.C. load current. Regulation by winding 18 limits the phase displacement of the grid voltage to the region of safe commutation or is set to determine the D.C. voltage. Both rectifier and converter regulators may have an overriding voltage control which may be set so that under normal conditions the current may lie between the two set values. With inverter commutation failure, the rectifier controller limits the current. In starting up the transmission line from the inverter station, the inverter is connected to the line which is open-circuited at the rectifier end. Then the rectifier is connected so that its exciter current is supplied and controlled by the inverter acting as a rectifier, until the rectifier is connected fully to supply and control the current, while the inverter determines the voltage, its grid angle being limited either with respect to safe commutation or to some other value. The inverter current setting may be manually adjustable at the rectifier end and is normally set only just below the rectifier control value, but when starting after an interruption, is set quite low until the system reaches full voltage. The rectifier may be regulated by remote control from the inverter end when the load has reached the maximum allowable to the inverter, the control of which is correspondingly altered either upon telephoned instructions, or automatically. If the control setting is lowered, the speed of doing it should be slow.
GB20709/44A 1943-10-30 1944-10-25 Means for controlling power transmissions utilizing an inverter Expired GB599435A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE249734X 1943-10-30

Publications (1)

Publication Number Publication Date
GB599435A true GB599435A (en) 1948-03-12

Family

ID=20306140

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20709/44A Expired GB599435A (en) 1943-10-30 1944-10-25 Means for controlling power transmissions utilizing an inverter

Country Status (2)

Country Link
CH (1) CH249734A (en)
GB (1) GB599435A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113595125A (en) * 2021-07-19 2021-11-02 许继集团有限公司 Transient overvoltage control method and device for high-voltage direct-current power transmission system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113595125A (en) * 2021-07-19 2021-11-02 许继集团有限公司 Transient overvoltage control method and device for high-voltage direct-current power transmission system
CN113595125B (en) * 2021-07-19 2024-05-10 许继集团有限公司 Transient overvoltage control method and device for high-voltage direct-current transmission system

Also Published As

Publication number Publication date
CH249734A (en) 1947-07-15

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