SE1100245A1 - Compensating device for a high voltage power transmission network - Google Patents
Compensating device for a high voltage power transmission network Download PDFInfo
- Publication number
- SE1100245A1 SE1100245A1 SE1100245A SE1100245A SE1100245A1 SE 1100245 A1 SE1100245 A1 SE 1100245A1 SE 1100245 A SE1100245 A SE 1100245A SE 1100245 A SE1100245 A SE 1100245A SE 1100245 A1 SE1100245 A1 SE 1100245A1
- Authority
- SE
- Sweden
- Prior art keywords
- high voltage
- compensating device
- power transmission
- transmission network
- compensator
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title claims description 18
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000003068 static effect Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 description 7
- 230000001939 inductive effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Föreliggande uppfinning avser en kompenseringsanordning (1) för högspänningsnät (9). Kompenseringsanordningen (1) innefattar en kompensator (3) anordnad att selektivt åstadkomma kompensering i högspänningsnätet (9) medelst impedansmatchning, och ett elektronrörssystem (5) för högspänningstillämpningar för att styra kompensatorn (3) att tillhandahålla kompensering i högspänningsnätet (9) medelst impedansmatchning.(Fig. 1)The present invention relates to a compensation device (1) for high voltage networks (9). The compensating device (1) comprises a compensator (3) arranged to selectively provide compensation in the high voltage network (9) by means of impedance matching, and an electron tube system (5) for high voltage applications for controlling the compensator (3) to provide compensation in the high voltage network (9) by means of impedance matching. Fig. 1)
Description
15 20 25 30 Semiconductor switching devices have several disadvantages. 15 20 25 30 Semiconductor switching devices have several disadvantages.
Semiconductor devices have a relatively low voltage/current rating, whereby a plurality of such devices must be connected in series in order to handle voltages in high voltage power transmission networks. Stacks of series connected semiconductor devices require large storage space.Semiconductor devices have a relatively low voltage / current rating, whereby a plurality of such devices must be connected in series in order to handle voltages in high voltage power transmission networks. Stacks of series connected semiconductor devices require large storage space.
Furthermore, semiconductor switching devices emit large amounts of heat. Therefore, complex cooling systems must generally be provided for cooling the semiconductor devices.Furthermore, semiconductor switching devices emit large amounts of heat. Therefore, complex cooling systems must generally be provided for cooling the semiconductor devices.
Hence, there is a need to improve existing solutions for providing power compensation in a high voltage transmission network.Hence, there is a need to improve existing solutions for providing power compensation in a high voltage transmission network.
SUMMARY A general object of the present invention is to provide an improved compensating device for a high voltage power transmission network.SUMMARY A general object of the present invention is to provide an improved compensating device for a high voltage power transmission network.
The above object is solved by means of the invention as defined by claim 1. Specific embodiments are set out in the dependent claims.The above object is solved by means of the invention as defined by claim 1. Specific embodiments are set out in the dependent claims.
In a first aspect of the present invention there is provided a compensating device for a high voltage power transmission network, the compensating device comprising: a compensator for selectively providing compensation to the high voltage power transmission network by means of impedance matching; and a high voltage electron tube system for controlling the compensator such that the compensator provides a required impedance matching.In a first aspect of the present invention there is provided a compensating device for a high voltage power transmission network, the compensating device comprising: a compensator for selectively providing compensation to the high voltage power transmission network by means of impedance matching; and a high voltage electron tube system for controlling the compensator such that the compensator provides a required impedance matching.
In particular, the above stated object is solved by providing switching devices in the form of a high voltage electron tube system for controlling the compensator. This is in contrast to 10 15 20 25 the prior art which utilizes semiconductor switching devices.In particular, the above stated object is solved by providing switching devices in the form of a high voltage electron tube system for controlling the compensator. This is in contrast to 10 15 20 25 the prior art which utilizes semiconductor switching devices.
The drawbacks mentioned in the background are reduced or eliminated by means of using high voltage electron tubes in the compensating device. Furthermore, the high voltage electron tubes allow for switching the compensator in and out of the transmission network at any time, thereby providing a faster compensating device than what has been possible by means of the prior art.The drawbacks mentioned in the background are reduced or eliminated by means of using high voltage electron tubes in the compensating device. Furthermore, the high voltage electron tubes allow for switching the compensator in and out of the transmission network at any time, thereby providing a faster compensating device than what has been possible by means of the prior art.
The high voltage electron tube system may comprise cold cathode electron tubes.The high voltage electron tube system may comprise cold cathode electron tubes.
The compensating device may be a static VAR compensator.The compensating device may be a static VAR compensator.
The compensator may be a reactor.The compensator may be a reactor.
The compensator may be a capacitor bank.The compensator may be a capacitor bank.
One embodiment may provide shunt compensation to the high voltage power transmission network.One embodiment may provide shunt compensation to the high voltage power transmission network.
Additional features and advantages will be disclosed in the following.Additional features and advantages will be disclosed in the following.
BRIEF DESCRIPTION OF THE DRAWINGS The invention and the advantages thereof will now be described by way of non-limiting examples, with reference to the accompanying drawings of which: Fig. 1 is a schematic block diagram of an example of a compensating device according to the present invention.BRIEF DESCRIPTION OF THE DRAWINGS The invention and its advantages will now be described by way of non-limiting examples, with reference to the accompanying drawings of which: Fig. 1 is a schematic block diagram of an example of a compensating device according to the present invention.
Fig. 2 is a circuit diagram of a shunt-connected electron tube controlled reactor. 10 _15 20 25 Fig. 3 is a circuit diagram of a shunt-connected electron tube switched capacitor.Fig. 2 is a circuit diagram of a shunt-connected electron tube controlled reactor. Fig. 3 is a circuit diagram of a shunt-connected electron tube switched capacitor.
DETAILED DESCRIPTION Fig. 1 shows a compensating device 1. The compensating device 1 is connected to a high voltage power transmission network 9 having a power supply node A and a power consumption node B.DETAILED DESCRIPTION Fig. 1 shows a compensating device 1. The compensating device 1 is connected to a high voltage power transmission network 9 having a power supply node A and a power consumption node B.
The power consumption node B has a load ll. The high voltage power transmission network 9 may typically be an alternating current network.The power consumption node B has a load ll. The high voltage power transmission network 9 may typically be an alternating current network.
As the load varies e.g. between being inductive or capacitive, it may be needed to compensate the high voltage power transmission network 9 in order to stabilize the network 9.As the load varies e.g. between being inductive or capacitive, it may be needed to compensate the high voltage power transmission network 9 in order to stabilize the network 9.
The compensating device 1, which may be a static VAR compensator, comprises a compensator arrangement 3, a high voltage electron tube system 5 comprising high voltage electron tubes and control means 7. The high voltage electron tubes are controllable by means of control means 7.The compensating device 1, which may be a static VAR compensator, comprises a compensator arrangement 3, a high voltage electron tube system 5 comprising high voltage electron tubes and control means 7. The high voltage electron tubes are controllable by means of control means 7.
The compensator arrangement 3 may comprise a reactor and a capacitor bank.The compensator arrangement 3 may comprise a reactor and a capacitor bank.
In case the load 11 is an inductive load, the capacitor bank portion of the compensator arrangement 3 is switched in on the high voltage power transmission network 9 by means of the high voltage electron tubes which are controlled by control means 7. Thereby, the voltage in the high voltage power transmission network 9 will become higher thus compensating the network 9.In case the load 11 is an inductive load, the capacitor bank portion of the compensator arrangement 3 is switched in on the high voltage power transmission network 9 by means of the high voltage electron tubes which are controlled by control means 7. Thereby, the voltage in the high voltage power transmission network 9 will become higher thus compensating the network 9.
In case the load is an inductive load, a reactor portion of the compensator arrangement 3 is connected to the high voltage power transmission network 9 by means of the high voltage electron tubes which are controlled by control means 7. 10 15 20 25 Thereby, VARs will be consumed from the high voltage power transmission network 9, lowering the system voltage thus compensating the network 9.In case the load is an inductive load, a reactor portion of the compensator arrangement 3 is connected to the high voltage power transmission network 9 by means of the high voltage electron tubes which are controlled by control means 7. 10 15 20 25 Thereby, VARs will be consumed from the high voltage power transmission network 9, lowering the system voltage thus compensating the network 9.
Electron tubes which are suitable for the present invention may for instance be cold cathode electron tubes. It is envisaged that electron tubes such as the cold cathode electron tube presented in US4950962 may be utilized for the purposes of the present invention.Electron tubes which are suitable for the present invention may for instance be cold cathode electron tubes. It is envisaged that electron tubes such as the cold cathode electron tube presented in US4950962 may be utilized for the purposes of the present invention.
Fig. 2 is a first example showing the principles of the present invention. Fig. 2 shows part of a compensator arrangement 3' which is shunt connected. Only a single phase 15 is shown for illustrative purposes.Fig. 2 is a first example showing the principles of the present invention. Fig. 2 shows part of a compensator arrangement 3 'which is shunt connected. Only a single phase 15 is shown for illustrative purposes.
The compensator arrangement 3' comprises a shunt-connected reactor comprising an inductor L. High voltage electron tube system 5' comprises high voltage electron tubes 13 controllable via control means (not shown). The effective reactance may be varied in a continuous manner by partial- conduction control of the electron tubes 13.The compensator arrangement 3 'comprises a shunt-connected reactor comprising an inductor L. High voltage electron tube system 5' comprises high voltage electron tubes 13 controllable via control means (not shown). The effective reactance may be varied in a continuous manner by partial- conduction control of the electron tubes 13.
Advantageously, by means of the present invention there is no need for series connection of a plurality of high voltage electron tubes 13 in order to obtain a switching device which can withstand high voltages and high currents. The electron tubes 13 are adapted to withstand continuously applied high voltages and high currents, as well as high voltage and high current transients.Advantageously, by means of the present invention there is no need for series connection of a plurality of high voltage electron tubes 13 in order to obtain a switching device which can withstand high voltages and high currents. The electron tubes 13 are adapted to withstand continuously applied high voltages and high currents, as well as high voltage and high current transients.
Fig. 3 is a second example showing the principles of the present invention. Fig. 3 shows part of a compensator arrangement 3” which is shunt connected. Only a single phase 15 is shown for illustrative purposes. 10 15 20 The compensator arrangement 3” comprises a shunt-connected capacitor bank with a capacitor C. High voltage electron tube system 5” comprises high voltage electron tubes 13 controllable via control means 7 of Fig. l. The electron tube controlled capacitor C can be switched in and out of the system at any time. To this end there is no need to switch out at a zero crossing of the current as with some semiconductor devices, due to the characteristics of the electron tubes 13.Fig. 3 is a second example showing the principles of the present invention. Fig. 3 shows part of a compensator arrangement 3 ”which is shunt connected. Only a single phase 15 is shown for illustrative purposes. 10 15 20 The compensator arrangement 3 ”comprises a shunt-connected capacitor bank with a capacitor C. High voltage electron tube system 5” comprises high voltage electron tubes 13 controllable via control means 7 of Fig. 1. The electron tube controlled capacitor C can be switched in and out of the system at any time. To this end there is no need to switch out at a zero crossing of the current as with some semiconductor devices, due to the characteristics of the electron tubes 13.
It is to be noted that a compensating device according to the present invention may have a compensator arrangement which includes both a reactor and a capacitor bank/capacitor banks for being able to compensate both inductive and capacitive loads. Alternatively, the compensating device may include a compensator arrangement having only a reactor or only a capacitor bank/capacitor banks for capacitive and inductive loads, respectively.It is to be noted that a compensating device according to the present invention may have a compensator arrangement which includes both a reactor and a capacitor bank / capacitor banks for being able to compensate both inductive and capacitive loads. Alternatively, the compensating device may include a compensator arrangement having only a reactor or only a capacitor bank / capacitor banks for capacitive and inductive loads, respectively.
The skilled person in the art realizes that the present invention by no means is limited to the examples described hereabove. On the contrary, many modifications and Variations are possible within the scope of the appended claims.The skilled person in the art realizes that the present invention by no means is limited to the examples described hereabove. On the contrary, many modifications and variations are possible within the scope of the appended claims.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1100245A SE1100245A1 (en) | 2011-04-04 | 2011-04-04 | Compensating device for a high voltage power transmission network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1100245A SE1100245A1 (en) | 2011-04-04 | 2011-04-04 | Compensating device for a high voltage power transmission network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE1100245A1 true SE1100245A1 (en) | 2011-04-06 |
Family
ID=43904074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1100245A SE1100245A1 (en) | 2011-04-04 | 2011-04-04 | Compensating device for a high voltage power transmission network |
Country Status (1)
| Country | Link |
|---|---|
| SE (1) | SE1100245A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565577A (en) * | 2016-06-30 | 2018-01-09 | 通用电气公司 | The flexible AC electrical transmission system of flue switching |
-
2011
- 2011-04-04 SE SE1100245A patent/SE1100245A1/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565577A (en) * | 2016-06-30 | 2018-01-09 | 通用电气公司 | The flexible AC electrical transmission system of flue switching |
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| NAV | Patent application has lapsed |