CA2117697A1 - Electrical energy transmission system - Google Patents
Electrical energy transmission systemInfo
- Publication number
- CA2117697A1 CA2117697A1 CA 2117697 CA2117697A CA2117697A1 CA 2117697 A1 CA2117697 A1 CA 2117697A1 CA 2117697 CA2117697 CA 2117697 CA 2117697 A CA2117697 A CA 2117697A CA 2117697 A1 CA2117697 A1 CA 2117697A1
- Authority
- CA
- Canada
- Prior art keywords
- transmission
- voltage
- phase
- energy
- transmission line
- 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.)
- Abandoned
Links
Classifications
-
- 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
- H02J3/34—Arrangements for transfer of electric power between networks of substantially different frequency
-
- 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
Abstract
The invention relates to a process and to a device for the economical transmission of low-power electrical energy over large distances. According to the invention, this energy is transmitted on a single-phase basis and a load-dependent voltage drop of the transmission line is appropriately compensated. Thus, localities situated at isolated locations can be supplied with electrical energy economically.
Description
~,A2 1 1 76 '~7iLE. PI~N THIS A~lcNr~
T~TRANSLATION
~lectrical energy transmission system The invention relates to a process and a device for the er~n~ ;rAl transmission of low-power electrical energy over large distances.
The transmission of electrical energy over large dis-tances takes place either on a three-phase basis or on a single-phase basis using the customary grid frequency of 50 Hz to 60 Hz. At thesé transmission frequencies, the inductive voltage drop on the transmission line is con-siderable, since the inductive voltage drop is frequency-~p~n~nt To transmit electrical energy the voltage is selected to be appropriately high, so that as a conse-quence of a smaller current the line losses decrease. The transmission of high power takes place by means of a high-voltage direct current transmission (HVDCT), whereby the line losses are still dependent only upon the ohmic resistance and the current flowing through.
A high-voltage direct current transmission system exhi-bits on the input side and on the output side in each instance a current rectifier-transformer, which trans-forms the voltages of the connected three-phase current grids to a magnitude corresponding to the transmission direct voltage. By means of current rectifier systems disposed in three-phase current bridge circuits, the three-phase voltage is converted into a direct voltage.
A plurality of such bridges are connected in series on the direct current side to increase the transmission voltage and transmission power; in this case, the center of the series circuit is in most cases grounded. At the same time, by means of an appropriate secondary star delta connection of the transformers, the h~ -n;r component on the three-phase current and direct current side is reduced as a consequence of the twelve-pulse reaction. In certain circumstances, additional filter circuits are also required on the direct current side.
i~21 1 7~'tq Both three-phase current grids are encumbered with an inductive reactive power - approximately 50 to 60 % of the active power - as a result of the commutation pro-cesses in the current rectifier.
A direct current open air~line is more economical than a three-phase current line of the same transmission capac-ity, since it can be better utilized in terms of voltage and current and moreover requires only two conductors.
This gives correspondingly fewer insulators, lighter pylons and a smaller line width; this is of very substan-tial importance when crossing a built-up area. ~owever, the current rectifier stations cost considerably more than normal transformer installations. Where ~VDCT is to be employed, these additional costs of the station must be balanced by the line savings; this presupposes a minimum distance. The PC~n( ; r~l limiting distances for a two-point connection for 800 to 2500 MW are between 500 and 1500 km. Taps on the direct current line for extract-ing or feeding in power may be provided by parallel-connected or series-connected int~ ~;Ate stations;
however, these have an unfavorable effect on the economy.
In energy transmission grids, not only the active power balance but also the observance of the reactive power balance must be taken into account by the grid operators.
While a non-compensated active power balance results in frequency deviations, a non-compensated reactive power balance results in voltage fluctuations. Reactive power is generated or respectively consumed by power stations, consumers and by the longitudinal and transverse imped-ances of the transmission lines and transmission cables.On the one hand, the magnitude of the inductive or capa-citive reactive power is dependent upon the voltage, while on the other hand the active power flux also has an effect on the reactive power balance in the transmission grid. Capacitors which are switched in in the case of high transmission power levels can produce the reactive C~2i l 7~
- 2a -power requirement of the transmission lines.
~ ~ i l 7~97 Capacitors switched into the line set reduce the effec-tive line i -~Anre and thus, at a high load current over long lines, contribute to increasing the stability by reducing the eranSmission angle.
As is known, isolated localities are supplied with energy from the three-phase supply grid by means of a single-phase transmission line; in this case, the transmission frequency is equal to the grid frequency. A further possibility for the supp~y of electrical energy to such localities consists in that diesel sets are provided on site. In the case of this possibility, however, the fuel supply must be guaranteed. ~oth supply systems are, however, nn~con~
The object of the invention is to specify a process and a device for the ec~n~ l transmission of low-power electrical energy over large distances.
According to the invention, this object is achieved in that the energy is transmitted on a single-phase basis and a load-dependent voltage drop of the transmission line is appropriately compensated.
Such an energy transmission exhibits the following advantages:
- line width lower as compared with three-phase trans-mission,~5 - resistance on the part of the population lower on account of inconspicuousness, - adequate for low power levels (0.5 to 20 MM) and large distances (50 to 300 km).
CA2i 1 76Y7 In this case, the series capacitor serves to keep the transmission voltage low. In contrast to high-power transmission systems, in this case higher degrees of compensation can be achieved, whereby the same voltage and loss conditions as in the case of a high-voltage direct current transmission system are approximately achieved. In the case of the use of a transmission frequency of 50 to 60 ~z, single-phase loads can be supplied with energy without the participation of a frequency changer. Since the power of the energy to be transmitted is low, also only low short-circuit currents arise in the event of a short circuit, so that the problems encountered in the case of high-power series-c~ ~ncated lines do not occur.
In an advantageous process, the energy is transmitted by means of a high transmission voltage with a transmission frequency different from zero.
Such an advantageous energy transmission exhibits the following advantages:
20 - The inductive voltage drop becomes substantially smaller, whereby in the case of equal energy to be transmitted the transmission voltage can be selected to be lower, - in consequence of the lower transmission voltage, the pylon height for the transmission line is reduced, whereby low-cost pylons are used, - a plurality of neighboring localities, which are situated in isolated locations, can be supplied with energy via a tie line with a plurality of taps.
A particular advantage of this energy transmission system consists in that alternative energy sources, such as water, wind energy and solar energy, which are converted into electrical energy remote from consumers, can be ec~,n( ;CA11Y transmitted.
t~A2i 1 76~7 In one : ~i L, the device for the tran~miCci rn of low-power electrical energy over large distances _ c~s a single-phase transmission line, a grid input, a capacitor bank, which is disposed in the path of the tr~ncmicsion line, and a control and regulating device for the control of an appropriate ,. ~ncation. By means of this embodi-ment, a low-power energy can be economically transmitted, since, as a consequence of this appropriate ~ ncation the transmission voltage can be kept low.
In a further em.bodiment of the device, a three-phase load is connected by means of a frequency changer to the transmission line. As a result of this, it is possible to supply even three-phase loads econ~ 'r~l ly with low-power energy over large distances, by means of a single-phase transmission line; in this case, the frequency changer is advantageously linked to the transmission line by means of a transformer. By means of the potential-separated attachment of the frequency changer to the transmission line, the frequency changer does not need to be designed for the high transmission voltage, whereby the costs of this frequency changer can be kept low. To generate the consumer frequency, known current converter circuits, for example a pulsed frequency changer, are provided.
For the further explanation of the invention, reference is made to the drawing, in which two ' ';-~rts of the device according to the invention for the transmission of low-power electrical energy over large distances are diagram.matically illustrated.
Figure 1 shows a first : 'o~;r t of the device accord-ing to the invention and in CA~ 7 Figure 2 there is shown a second '_';~-nt of the device in greater detail.
Figure 1 shows an energy transmisSion system according to the invention, which system comprises a grid input 2, a capacitor bank 4 with an associated control and regu-lating device 6 and a single-phase transmission line 8.
Moreover, there is further provided a grid protection device 10, comprising a power switch 12, a current pickup device 14 and a protective device 16. The capacitor bank 4 is disposed in the path of the single-phase trans-mission line 8. This capacitor bank 4 can also be accom-modated in a transmitting switching station. This capacitor bank 4 can be switched in or out as a whole or in a plurality of partial capacitors (segments) in series. Such a capacitor bank 4 comprises a plurality of series capacitors, in parallel with which in each instance a surge voltage arrester is electrically con-nected. A parallel circuit comprising a bypass power switch and usually a spark gap is electrically connected in parallel with the surge voltage arrester. Moreover, each segment is provided with an attenuation element (choke). Such an equivalent circuit can be inferred from the article "Geregelte Parallel- und R.~; h_nkl , C~A~tion [Regulated Parallel and Series Compensation]" by G.~.
Thumm and P. Walther, printed in the journal "Elektrie", 13erlin 45, 1991, No. 3, pages 88 to 90. The switching in and switching out of the capacitors of the capacitor bank 4 takes place by means of a control, regulating and monitoring device 6 in that in each instance a parallel power switch, or an electronic switch, for example a thyristor, is opened and respectively closed. A further improvement is possible by means of a stepless, regulated _ ~n~ation. A known possibility consists in connecting a suitably dimensioned choke in series with the thyristor switch. Such a circuit is printed for example in Christl et al. "Advanced Series Compensation with variable T -~AnAe~/ '~PRI Nov. 90 in Eigure 3.
~2i 1 16~-l , The protection of each capacitor of the capacitor bank 4 in the event of a grid short circuit is guaranteed by the parallel arresters, by the triggerable spark gap and/or by the parallel power switch. Moreover, the capacitor bank 4 is protected by means of the grid protection device 10, for example in the case of a grid short circuit.
A medium-voltage grid can be provided as grid input 2.
Moreover, it is possible to use alternative energy sources, such as water, wind energy and solar energy, which are available remote from consumers, as grid input 2. Thus, alternative energy can be used economic-ally for supply to remote consumers; in this case, this energy is transmitted economically by this transmission system. The frequency of the grid input 2 is 50 to 60 Hz, but can also be substantially lower, but different from zero Hz. ~y reducing the transmission frequency, the voltage drop of the transmission line 8 is reduced, whereby the same energy can be transmitted with a low transmission voltage.
The length of the transmission line 8 in the case of this energy transmission system according to the invention is between a few kilometers and a few hundred kilometers and the energy which is to be transmitted is approximately 0.5 to 20 MW. Since the effective line impedance can be to a large extent compensated, the same voltage and loss conditions as in the case of a high-voltage direct current transmission system are achieved. In this case, the series capacitor 4, in contrast to the known use, serves rather to keep the transmission voltage low, so that the initially recited advantages are achieved.
l,~2~ 1 i6~1 8 -Figure 2 shows a further '-~; nt of the device accord-ing to the invention, in which identical elements bear identical reference symbols. In this ~-~i nt~ a single-phase load 18 and a three-phase load 20 are connected to the end of the transmission line 8. Since the voltage value of the single-phase load 18 is different from the value of the transmission voltage, for the potential-isolating coupling of the load 18 use is made of a transformer 22. The three-phase load 20 is likewise coupled via a transformer 24 to the transmission line 8; in this case, a frequency changer 26 is provided between transformer 24 and load 20. }3y means of this frequency changer 26, for example a pulsed frequency changer, a three-phase supply voltage at 50 to 60 hz is obtained from a single-phase grid voltage at 50 to 60 ~z.
1ikewise, the frequency changer 26 can be used, in the case of the use of a far lower transmission frequency than 50 ~z, to generate from this transmission frequency in turn a customary consumer frequency of 50 to 60 hz. As a result of the use of the transformer 24, the frequency changer 26 does not need to be designed for the high transmission voltage, whereby the economy of the trans-mission system is considerably increased.
As can be inferred from Figure 2, the three-phase load 20 is supplied with electrical power by means of a tap 28 from the transmission line 8. As compared with a high-voltage direct current transmission device, in the case of this transmission system taps 28 on the transmission line 8 can be realized for the extraction or feeding in of power, without in this case unfavorably influencing the economy.
In this ~ -'i t, a three-phase high-voltage supply is provided as grid input 2. The value of this three-phase high voltage is step-down-transformed by means of an input transformer 30 to the value of the single-phase ~A~l 176~7 9 transmission voltage. As a result of this, this trans-mission system can be connected to any voltage level, without the economy being unfavorably influenced.
3y means of this transmission system, remote localities can be supplied with low-power electrical energy economi-cally over a large distance by means of a single-phase tie line.
T~TRANSLATION
~lectrical energy transmission system The invention relates to a process and a device for the er~n~ ;rAl transmission of low-power electrical energy over large distances.
The transmission of electrical energy over large dis-tances takes place either on a three-phase basis or on a single-phase basis using the customary grid frequency of 50 Hz to 60 Hz. At thesé transmission frequencies, the inductive voltage drop on the transmission line is con-siderable, since the inductive voltage drop is frequency-~p~n~nt To transmit electrical energy the voltage is selected to be appropriately high, so that as a conse-quence of a smaller current the line losses decrease. The transmission of high power takes place by means of a high-voltage direct current transmission (HVDCT), whereby the line losses are still dependent only upon the ohmic resistance and the current flowing through.
A high-voltage direct current transmission system exhi-bits on the input side and on the output side in each instance a current rectifier-transformer, which trans-forms the voltages of the connected three-phase current grids to a magnitude corresponding to the transmission direct voltage. By means of current rectifier systems disposed in three-phase current bridge circuits, the three-phase voltage is converted into a direct voltage.
A plurality of such bridges are connected in series on the direct current side to increase the transmission voltage and transmission power; in this case, the center of the series circuit is in most cases grounded. At the same time, by means of an appropriate secondary star delta connection of the transformers, the h~ -n;r component on the three-phase current and direct current side is reduced as a consequence of the twelve-pulse reaction. In certain circumstances, additional filter circuits are also required on the direct current side.
i~21 1 7~'tq Both three-phase current grids are encumbered with an inductive reactive power - approximately 50 to 60 % of the active power - as a result of the commutation pro-cesses in the current rectifier.
A direct current open air~line is more economical than a three-phase current line of the same transmission capac-ity, since it can be better utilized in terms of voltage and current and moreover requires only two conductors.
This gives correspondingly fewer insulators, lighter pylons and a smaller line width; this is of very substan-tial importance when crossing a built-up area. ~owever, the current rectifier stations cost considerably more than normal transformer installations. Where ~VDCT is to be employed, these additional costs of the station must be balanced by the line savings; this presupposes a minimum distance. The PC~n( ; r~l limiting distances for a two-point connection for 800 to 2500 MW are between 500 and 1500 km. Taps on the direct current line for extract-ing or feeding in power may be provided by parallel-connected or series-connected int~ ~;Ate stations;
however, these have an unfavorable effect on the economy.
In energy transmission grids, not only the active power balance but also the observance of the reactive power balance must be taken into account by the grid operators.
While a non-compensated active power balance results in frequency deviations, a non-compensated reactive power balance results in voltage fluctuations. Reactive power is generated or respectively consumed by power stations, consumers and by the longitudinal and transverse imped-ances of the transmission lines and transmission cables.On the one hand, the magnitude of the inductive or capa-citive reactive power is dependent upon the voltage, while on the other hand the active power flux also has an effect on the reactive power balance in the transmission grid. Capacitors which are switched in in the case of high transmission power levels can produce the reactive C~2i l 7~
- 2a -power requirement of the transmission lines.
~ ~ i l 7~97 Capacitors switched into the line set reduce the effec-tive line i -~Anre and thus, at a high load current over long lines, contribute to increasing the stability by reducing the eranSmission angle.
As is known, isolated localities are supplied with energy from the three-phase supply grid by means of a single-phase transmission line; in this case, the transmission frequency is equal to the grid frequency. A further possibility for the supp~y of electrical energy to such localities consists in that diesel sets are provided on site. In the case of this possibility, however, the fuel supply must be guaranteed. ~oth supply systems are, however, nn~con~
The object of the invention is to specify a process and a device for the ec~n~ l transmission of low-power electrical energy over large distances.
According to the invention, this object is achieved in that the energy is transmitted on a single-phase basis and a load-dependent voltage drop of the transmission line is appropriately compensated.
Such an energy transmission exhibits the following advantages:
- line width lower as compared with three-phase trans-mission,~5 - resistance on the part of the population lower on account of inconspicuousness, - adequate for low power levels (0.5 to 20 MM) and large distances (50 to 300 km).
CA2i 1 76Y7 In this case, the series capacitor serves to keep the transmission voltage low. In contrast to high-power transmission systems, in this case higher degrees of compensation can be achieved, whereby the same voltage and loss conditions as in the case of a high-voltage direct current transmission system are approximately achieved. In the case of the use of a transmission frequency of 50 to 60 ~z, single-phase loads can be supplied with energy without the participation of a frequency changer. Since the power of the energy to be transmitted is low, also only low short-circuit currents arise in the event of a short circuit, so that the problems encountered in the case of high-power series-c~ ~ncated lines do not occur.
In an advantageous process, the energy is transmitted by means of a high transmission voltage with a transmission frequency different from zero.
Such an advantageous energy transmission exhibits the following advantages:
20 - The inductive voltage drop becomes substantially smaller, whereby in the case of equal energy to be transmitted the transmission voltage can be selected to be lower, - in consequence of the lower transmission voltage, the pylon height for the transmission line is reduced, whereby low-cost pylons are used, - a plurality of neighboring localities, which are situated in isolated locations, can be supplied with energy via a tie line with a plurality of taps.
A particular advantage of this energy transmission system consists in that alternative energy sources, such as water, wind energy and solar energy, which are converted into electrical energy remote from consumers, can be ec~,n( ;CA11Y transmitted.
t~A2i 1 76~7 In one : ~i L, the device for the tran~miCci rn of low-power electrical energy over large distances _ c~s a single-phase transmission line, a grid input, a capacitor bank, which is disposed in the path of the tr~ncmicsion line, and a control and regulating device for the control of an appropriate ,. ~ncation. By means of this embodi-ment, a low-power energy can be economically transmitted, since, as a consequence of this appropriate ~ ncation the transmission voltage can be kept low.
In a further em.bodiment of the device, a three-phase load is connected by means of a frequency changer to the transmission line. As a result of this, it is possible to supply even three-phase loads econ~ 'r~l ly with low-power energy over large distances, by means of a single-phase transmission line; in this case, the frequency changer is advantageously linked to the transmission line by means of a transformer. By means of the potential-separated attachment of the frequency changer to the transmission line, the frequency changer does not need to be designed for the high transmission voltage, whereby the costs of this frequency changer can be kept low. To generate the consumer frequency, known current converter circuits, for example a pulsed frequency changer, are provided.
For the further explanation of the invention, reference is made to the drawing, in which two ' ';-~rts of the device according to the invention for the transmission of low-power electrical energy over large distances are diagram.matically illustrated.
Figure 1 shows a first : 'o~;r t of the device accord-ing to the invention and in CA~ 7 Figure 2 there is shown a second '_';~-nt of the device in greater detail.
Figure 1 shows an energy transmisSion system according to the invention, which system comprises a grid input 2, a capacitor bank 4 with an associated control and regu-lating device 6 and a single-phase transmission line 8.
Moreover, there is further provided a grid protection device 10, comprising a power switch 12, a current pickup device 14 and a protective device 16. The capacitor bank 4 is disposed in the path of the single-phase trans-mission line 8. This capacitor bank 4 can also be accom-modated in a transmitting switching station. This capacitor bank 4 can be switched in or out as a whole or in a plurality of partial capacitors (segments) in series. Such a capacitor bank 4 comprises a plurality of series capacitors, in parallel with which in each instance a surge voltage arrester is electrically con-nected. A parallel circuit comprising a bypass power switch and usually a spark gap is electrically connected in parallel with the surge voltage arrester. Moreover, each segment is provided with an attenuation element (choke). Such an equivalent circuit can be inferred from the article "Geregelte Parallel- und R.~; h_nkl , C~A~tion [Regulated Parallel and Series Compensation]" by G.~.
Thumm and P. Walther, printed in the journal "Elektrie", 13erlin 45, 1991, No. 3, pages 88 to 90. The switching in and switching out of the capacitors of the capacitor bank 4 takes place by means of a control, regulating and monitoring device 6 in that in each instance a parallel power switch, or an electronic switch, for example a thyristor, is opened and respectively closed. A further improvement is possible by means of a stepless, regulated _ ~n~ation. A known possibility consists in connecting a suitably dimensioned choke in series with the thyristor switch. Such a circuit is printed for example in Christl et al. "Advanced Series Compensation with variable T -~AnAe~/ '~PRI Nov. 90 in Eigure 3.
~2i 1 16~-l , The protection of each capacitor of the capacitor bank 4 in the event of a grid short circuit is guaranteed by the parallel arresters, by the triggerable spark gap and/or by the parallel power switch. Moreover, the capacitor bank 4 is protected by means of the grid protection device 10, for example in the case of a grid short circuit.
A medium-voltage grid can be provided as grid input 2.
Moreover, it is possible to use alternative energy sources, such as water, wind energy and solar energy, which are available remote from consumers, as grid input 2. Thus, alternative energy can be used economic-ally for supply to remote consumers; in this case, this energy is transmitted economically by this transmission system. The frequency of the grid input 2 is 50 to 60 Hz, but can also be substantially lower, but different from zero Hz. ~y reducing the transmission frequency, the voltage drop of the transmission line 8 is reduced, whereby the same energy can be transmitted with a low transmission voltage.
The length of the transmission line 8 in the case of this energy transmission system according to the invention is between a few kilometers and a few hundred kilometers and the energy which is to be transmitted is approximately 0.5 to 20 MW. Since the effective line impedance can be to a large extent compensated, the same voltage and loss conditions as in the case of a high-voltage direct current transmission system are achieved. In this case, the series capacitor 4, in contrast to the known use, serves rather to keep the transmission voltage low, so that the initially recited advantages are achieved.
l,~2~ 1 i6~1 8 -Figure 2 shows a further '-~; nt of the device accord-ing to the invention, in which identical elements bear identical reference symbols. In this ~-~i nt~ a single-phase load 18 and a three-phase load 20 are connected to the end of the transmission line 8. Since the voltage value of the single-phase load 18 is different from the value of the transmission voltage, for the potential-isolating coupling of the load 18 use is made of a transformer 22. The three-phase load 20 is likewise coupled via a transformer 24 to the transmission line 8; in this case, a frequency changer 26 is provided between transformer 24 and load 20. }3y means of this frequency changer 26, for example a pulsed frequency changer, a three-phase supply voltage at 50 to 60 hz is obtained from a single-phase grid voltage at 50 to 60 ~z.
1ikewise, the frequency changer 26 can be used, in the case of the use of a far lower transmission frequency than 50 ~z, to generate from this transmission frequency in turn a customary consumer frequency of 50 to 60 hz. As a result of the use of the transformer 24, the frequency changer 26 does not need to be designed for the high transmission voltage, whereby the economy of the trans-mission system is considerably increased.
As can be inferred from Figure 2, the three-phase load 20 is supplied with electrical power by means of a tap 28 from the transmission line 8. As compared with a high-voltage direct current transmission device, in the case of this transmission system taps 28 on the transmission line 8 can be realized for the extraction or feeding in of power, without in this case unfavorably influencing the economy.
In this ~ -'i t, a three-phase high-voltage supply is provided as grid input 2. The value of this three-phase high voltage is step-down-transformed by means of an input transformer 30 to the value of the single-phase ~A~l 176~7 9 transmission voltage. As a result of this, this trans-mission system can be connected to any voltage level, without the economy being unfavorably influenced.
3y means of this transmission system, remote localities can be supplied with low-power electrical energy economi-cally over a large distance by means of a single-phase tie line.
Claims (6)
1. A process for the economical transmission of low-power electrical energy over large distances, in which this energy is transmitted on a single-phase basis and a load-dependent voltage drop of the transmission line (8) is appropriately compensated.
2. The process as claimed in claim 1, characterized in that the energy is transmitted by means of a high transmission voltage with an arbitrarily selectable conventional transmission frequency different from zero.
3. A device for carrying out the process as claimed in claim 1, comprising a single-phase transmission line (8), a grid input (2), a capacitor bank (4), which is disposed in the path of the transmission line (8), and a control, regulating and monitoring device (6) for controlling the appropriate compensation.
4. The device as claimed in claim 3, characterized in that an input transformer (30) is provided between the grid input (2) and the capacitor bank (4).
5. The device as claimed in claim 3, characterized in that a three-phase load (20) is connected to the transmission line (8) by means of a frequency changer (26).
6. The device as claimed in claim 5, characterized in that the frequency changer (26) is linked to a transmission line (8) by means of a transformer (24).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DE1992/000206 WO1993018567A1 (en) | 1992-03-11 | 1992-03-11 | Electric enery transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2117697A1 true CA2117697A1 (en) | 1993-09-16 |
Family
ID=6874894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2117697 Abandoned CA2117697A1 (en) | 1992-03-11 | 1992-03-11 | Electrical energy transmission system |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0630534A1 (en) |
| AU (1) | AU1361792A (en) |
| CA (1) | CA2117697A1 (en) |
| WO (1) | WO1993018567A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2407411A1 (en) * | 2000-04-25 | 2001-11-01 | Sp Systems Pte Ltd. | Dynamic series voltage compensator and method thereof |
| WO2005124959A2 (en) * | 2004-06-15 | 2005-12-29 | Siemens Aktiengesellschaft | Device for the transmission of electrical energy between supply networks |
| WO2009015670A1 (en) * | 2007-07-30 | 2009-02-05 | Siemens Aktiengesellschaft | Energy transmission system, particularly for offshore oil installations |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2939514A1 (en) * | 1979-09-28 | 1981-04-16 | Siemens AG, 1000 Berlin und 8000 München | DEVICE FOR TRANSMITTING HIGH-PERFORMANCE ELECTRICAL ENERGY FROM A THREE-PHASE SUPPLY NETWORK HIGHER FREQUENCY TO A SINGLE-PHASE LOAD NETWORK LOWER FREQUENCY |
| DE3150385C2 (en) * | 1981-12-17 | 1985-01-03 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Static network coupling for high performance for coupling a three-phase network with a higher frequency and a single-phase network with a lower frequency |
| GB8503045D0 (en) * | 1985-02-06 | 1985-03-06 | Ass Elect Ind | A c power supply system |
| US4999565A (en) * | 1990-01-02 | 1991-03-12 | Electric Power Research Institute | Apparatus for controlling the reactive impedance of a transmission line |
-
1992
- 1992-03-11 EP EP92905777A patent/EP0630534A1/en not_active Ceased
- 1992-03-11 WO PCT/DE1992/000206 patent/WO1993018567A1/en not_active Application Discontinuation
- 1992-03-11 CA CA 2117697 patent/CA2117697A1/en not_active Abandoned
- 1992-03-11 AU AU13617/92A patent/AU1361792A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU1361792A (en) | 1993-10-05 |
| WO1993018567A1 (en) | 1993-09-16 |
| EP0630534A1 (en) | 1994-12-28 |
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