High-voltage direct current transfer device

IPC classes for russian patent High-voltage direct current transfer device (RU 2468486):

H02J3/36 - Arrangements for transfer of electric power between ac networks ; via a high-tension dc link

Another patents in same IPC classes:

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Transmission system / 2397591

HVDC transmission system includes on one end of bipolar HVDC transmission line the converting station intended for connection of the above transmission line to AC system. This station has two converters and DC neutral circuit being common for converters. The above DC neutral circuit has individual connecting element (142, 143) of electrode line, which connects to electrode lines (191, 192). Electrode lines (191, 192) have such dimensions that when the converting station operates in single-pole mode, the transmission of actually total current to electrode station (190) through the one or several left electrode lines can be possible at disconnection of arbitrary number of electrode lines.

Converting substation / 2397590

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Converter / 2396665

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Dc high-voltage power transmission device / 2381606

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Converting substation / 2376694

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Heavy-power multiphase converter substation / 2260234

Proposed substation characterized in high reliability at its equivalent rectifying phase characteristic equal to 48, 60, 72, or 96 has each of its n converters incorporating converter transformer and rectifier. All converter transformers are connected to high-voltage supply mains. Converters are available in m design alternates distinguished by absolute angle of phase shift between primary line and phase voltages of converter transformers and have 2k relatively parallel dc busways. Converters are disposed along dc busways and all rectifiers are electrically connected to these busways. Converters incorporating converter transformers having maximal absolute angle of phase shift are disposed in extreme positions and those whose converter transformers have minimal absolute angle of phase shift are arranged in middle part of multiphase converter substation, where n is number of converters, 4 ≤ n ≤ 10; 2k is number of positive and negative dc busways, 2 ≤ 2k ≤ 64; m is number of converter design alternates distinguished by absolute angle of phase shift of converter transformers.

System for utilization of coal power by means of super-conductive electric energy transfer / 2316874

Device contains means for generating thermal electric energy for transformation of coal energy in coal deposit, positioned at location which is remote from end consumer, into electric energy by generating thermal electric energy near the coal deposit, alternating current load at end consumer, network for transmission/distribution of alternating current and means for transferring electric energy for transferring electric energy from device for generating thermal electric energy near the coal deposit to transmission/distribution network. Electric energy transmission device consists of a combination of super-conductive constant current electric energy transmission system with low losses during transmission with usage of super-conductive power cable and conventional transmission/distribution network with normal temperature.

Method and device for improvement of alternating currant power transmission system dispatching capabilities, system stability and power flow controllability using direct currant power transmission system / 2343614

Invention is related to electric engineering and can be used to operate at joint centres of electric power consumption for instance for large municipal areas or geographical regions. In the method and the device for improvement of alternating currant power transmission system dispatching capabilities, electric power transmission system provides isolation of local alternating currant power supply system from surrounding alternating current system, and local centre of alternating current power consumption has multiple local alternating current loads and distributing system feeding line that supplies multiple local alternating current loads. Additionally there is at least one remote power station or other electric power source to deliver alternating current electric power to local centre of alternating current power consumption. To isolate alternating current electric power received from remote power station from local centre of alternating current power consumption by converting alternating current electric power into direct current electric power, full or partial ring of direct current power lines are created between local centre of alternating current power consumption and remote power station. Then the second conversion of direct current electric power into alternating direct current electric power is performed on the basis of demands in electric load. Feeding line of distributing system delivers alternating current electric power from remote power station providing isolation of all local alternating current loads.

Reduction of multi-version energy generation prime cost by using currently most profitable version of production / 2376693

Converting substation / 2376694

Dc high-voltage power transmission device / 2381606

Converting substation / 2396664

Converter / 2396665

Converting substation / 2397590

Transmission system / 2397591

FIELD: electricity.

SUBSTANCE: high-voltage direct current device includes the first converter unit (1) and the second converter unit (4), which are connected to main line (11, 21) and to return line (12, 22) respectively. Each converter unit (1, 4) is connected to an individual return line (12, 22). Return lines (12, 22) are connected to each other through pole line (31); at that, pole line (31) can be interrupted by means of pole line interruption unit (32).

EFFECT: providing high variability of the device in operating conditions, and namely for compensation of deactivations determined by the operation.

8 cl, 5 dwg

The invention relates to a device for transmitting a DC high voltage from the first Converter unit and the second conversion unit, which are respectively connected to the trunk line and a return line.

A similar device is known from practice. In the known device converting the blocks are connected, respectively, to the main line and to a common return line, and return line associated with a single outlet line devices auxiliary lines to both the DC circuit to close the same for both main lines ground electrode. But here, there are some limitations in the operating modes of the device, in particular in the case when there is a failure in the operation of the auxiliary line, and therefore one trunk line should be used as a return line.

The basis of the invention lies in the challenge to create a device of the aforementioned type, which has a high wareremote operational modes, especially for compensation due to the functioning of the trips.

This task in the device of the aforementioned type is solved in accordance with the invention by the fact that each Converter unit is connected on a separate return line and the return line connected between the FDS is th through pole line, which may be interrupted by using the interrupt pin of the line.

Due to the fact that now there are two return lines, which in bipolar normal operating mode associated with the corresponding Converter unit, but connected through interruptible pole line with each other, it is possible, for example, when caused by the operation of the return line outages and mud then block interrupt pin line, to maintain, however, and further monopolar mode with the remaining reverse conductive line and correlated with her trunk line, or you can also move to other modes.

Appropriate to further form of execution of the invention are presented in the dependent claims.

Next explained in more detail an example of the carrying out of the invention with reference to the drawings showing the following:

figure 1 diagram of the exemplary embodiment corresponding to the invention of the device;

2 the diagram of figure 1 in the bipolar mode of operation corresponding to the invention of a device with two operating return lines;

figure 3 scheme of figure 1 in a monopolar mode of operation corresponding to the invention of a device with two operating return lines;

figure 4 scheme of figure 1 in a monopolar mode of operation corresponding to the image the structure of the device with only one functioning return line; and

figure 5 scheme of figure 1 in a monopolar mode of operation corresponding to the invention the device is disconnected return line and the second trunk line is included as a return line for the first trunk line.

Figure 1 shows a diagram of the exemplary embodiment corresponding to the invention of devices for bipolar DC transmission line high voltage. The device of figure 1 contains the first Converter unit 1, which is conventionally shown with two transducers 2, 3, and the second conversion unit 4, which is conventionally also presents two transducers 5, 6. Each Converter block 1, 4 of the AC voltage in the range of, typically, from a few tens of kilovolts to several hundred kilovolts entered in one of the respective inverter units 1, 4 through lines 7, 8, 9, 10 alternating voltage may be generated DC voltage, respectively, of the same order of magnitude.

To the first Converter unit 1 is connected to the first main line 11 and the first return line 12, which may be a DC voltage developed the first Converter unit 1. In the first main line 11 is enabled block 13 disconnect the trunk line with which the first trunk if the Oia 11 with its exhaust is channeled from the first Converter unit 1, and here, in the order of explanation, it should be noted that in the present description the term "block separation" refers to the device to enable de-energized conductor in a strong current. Accordingly, in the first return line 12 includes a first block 14 disconnect the return line through which the first return line 12 with its exhaust is channeled from the first Converter unit 1.

On the opposite the first Converter unit 1 side of the separation block 13 trunk line placed in the first main line 11, and block 14 disconnect the return line, placed in the first return line 12, the first bypass line 15 connects the first main line 11 and the first return line 12, and the first bypass line 15 is included in block 16 of the separation bypass line through which the first bypass line 15 is interrupted.

On the opposite the first block 14 disconnect the return line side of the first bypass line 15 to the first return line 12 is connected, in order from the first Converter unit 1, the second block 17 disconnect the return line, block 18 interrupt return line, and the third block disconnect return line, and here, in the order of explanation, it should be noted that in the present description the concept of the block interrupt" refers to the device to enable the current-carrying conductor in a strong current. The first return line 12 with its end extending from the third block 19 disconnect the return line is connected to the grounding electrode 20.

Respectively to the second converting unit 4 connected to the second trunk line 21 and the second return line 22, which may be a DC voltage generated second converting unit 4. The second main line 21 included unit 23 disconnect the trunk line with which the second trunk line 21 with its exhaust is channeled from the second converting unit 4. Accordingly, in the second return line 22 is enabled the first block 24 disconnect the return line through which the second return line 22 with its exhaust is channeled from the second Converter unit 4.

On the opposite second converting unit 4 side of the block 23 end key trunk line placed in the second trunk line 21, and the first block 24 and the opposite end of the line, placed in the second return line 22, the second shunt line 25 connects the second main line 21 and the second return line 22, and the second bypass line 25 is enabled, the block 26 separation bypass line through which the second bypass line 25 may be interrupted.

On the opposite the first block is 24 disconnect the return line side of the output of the second bypass line 25 to the second return line 22 is connected, in order from the second conversion unit 4, the second block 27 disconnect the return line, block 28 interrupt return line, and the third block 29 disconnect the return line. The second return line 22 with its end extending from the third block 29 disconnect the return line is connected to the ground electrode 30.

In addition, from figure 1 it is seen that between the first blocks 14, 24 disconnect the return line and the second blocks 17, 27 disconnect return line connected pole line 31 connecting the first return line 12 and the second return line 22. In the pole line is enabled, the block 32 interrupt pole line, which can not be included under tension from both sides using the first block 33 of the pole separation line and the second unit 34 of the pole separation line. Between the block 32 interrupt pin and line block 33, 34 of the pole separation line in the configuration of figure 1 the first block 33 of the separation pole line, line 35 ground that connects the pole to the line 31 through the high-speed block 36 enable the grounding electrode 37 emergency ground.

Finally, between the return lines 12, 22 on the opposite blocks 18, 28 interrupt return line side of the third block 19, 29 disconnect the return line for a bypass for the needs of plots a return line 12, 22 between storyblock 17, 27 disconnect the return line, block 18, 28 interrupt return line and the third block 19, 29 disconnect return line connected to the connector 38, which, with the possibility of interruption by a block 39 of the end connectors and bypass connecting line 38 is locked conducting manner.

For the sake of completeness it should be mentioned that in or on different lines 11, 12, 21, 22, 31, 35 presented in figure 1 of the device in places, obvious as it expedient to a person skilled in the art, are blocks 40 current measurement and the blocks 41 of the voltage measurement.

Next explained is a typical operation modes corresponding to the invention of the device, and for blocks of separation, and also blocks interrupts completely blacked out characters are switched conductive state, and only framed with a black outline and white inside the open symbols represent non-conductive state.

Figure 2 shows the diagram of figure 1 in the bipolar mode of operation corresponding to the invention of the device with all the live running trunk lines 11, 21 and working with both return lines 12, 22. In this mode, in addition to the units 16, 26 separation shunt line, block 39 disconnect the connector and, as a rule, only in case of emergency lane which led to the conducting state of a high-speed unit 36 include grounding, included in non-conductive state, all blocks 13, 14, 17, 19, 23, 24, 27, 29, 33, 34 end blocks 18, 28, 32 interrupt is enabled in a conducting state. In this control mode trunk line is unlocked and active return line 12, 22 are connected to each other through the connected pole line 31. Thus, both the return line, compared to flowing in the main lines 11, 21 strong currents of high voltage, with a typical full power of several hundred MW, can conduct a relatively small surge currents.

Figure 3 shows the diagram of figure 1 in a monopolar mode of operation corresponding to the invention of a device with a main line 11, 21, in this case, the first main line 11, and two running back lines 12, 22. In this operating mode, the blocks 16, 26 separation shunt line, the second block 23 end key trunk line, switching to the conducting state of the second main line 21, the first block 24 disconnect the return line, switching to the conducting state of the second feedback line 22, a high speed unit 36 include ground and block 39 of the end connectors is included in the non-conductive state, while the remaining blocks 13, 14, 17, 19, 27, 29, 33, 34 end blocks 18, 28, 32 interrupt is enabled in navigating the m state. Monopolar mode with both a running back lines 12, 22 will be introduced in the event of an outage of one of the trunk lines 11, 21, in this case, the second main line 21, so that in this operating mode, possible to achieve optimum output surge currents.

Figure 4 shows the diagram of figure 1 in a monopolar mode of operation corresponding to the invention of a device with only working a main line 11, 21, in this case, the first main line 11, and with only a functioning return line 12, 22, in this case, the first return line 12. In this mode of operation, the separation block 13 main line, switching to the conducting state of the first main line 11, the blocks 14, 17, 19 separation, switching to the conducting state of the first return line 12, block 18 interrupt return line included in a conducting state, and the first block 33 interrupts the pole line to connect to, if necessary, quick-release unit 36 include grounding, while the remaining blocks 16, 23, 24, 26, 27, 29, 34, 39 separation, as well as the rest of the blocks 28, 32 interrupts, including fast block 36 enable grounding included in the non-conductive state. From figure 4 it is seen that thus, and, if necessary, disconnect the return line 12, 22 can be maintained monopolar re them. In addition, from figure 4 we can see that when you disconnect the return line 12, 22 may also be supported by the bipolar operating mode with a current-carrying trunk lines 11, 21, at which the other return line 12, 22 are included in a conducting state for both main lines 11, 21.

Figure 5 shows the diagram of figure 1 in a monopolar mode of operation corresponding to the invention of a device with only working a main line 11, 21, in this case, the first main line 11, and disabled return lines 12, 22, and the second trunk line 21 is included as a return line for the first trunk line 11, and line 35 grounding included as an auxiliary line to ground surge currents. In this mode of operation, the separation block 13 main line, switching to the conducting state of the first main line 11, the first block 14 disconnect the return line, switching to the conducting state from the first return line 12 to the second unit 17 disconnect the return line, the blocks 33, 34 of the pole separation line, and the block 26 separation shunt line that translates into a conductive state of the second bypass line 25, included in a conductive state, while the remaining blocks 16, 17, 19, 23, 24, 27, 29 39 separation, and the blocks 18, 28 interrupt return line included in nepravda is her condition. In this operating mode, high-speed unit 36 include grounding for safety reasons, for the first Converter unit 1 included in a conducting state.

In addition, from consideration of the above embodiments to a person skilled in the art it should be clear that on the basis of placing blocks 13, 14, 16, 17, 19, 23, 24, 27, 29, 33, 34, 39 separation target specific working areas corresponding to the invention the device can be switched not under tension, in order to carry out maintenance work. In this regard, a particularly expedient that presented in figure 1, the device is free from intersections potentially under high voltage lines 11, 12, 15, 21, 22, 25, 31, 38, that significantly reduces the risk of critical situations, especially when maintenance work.

1. Device for the transmission of direct current high voltage from the first Converter unit (1) and with the second Converter unit (4)which are respectively connected to trunk lines (11, 21) and to a return line (12, 22), characterized in that each Converter unit (1, 4) is connected to a separate return line (12, 22), and that the return line (12, 22) are connected through the pole line (31), pole and line (31) can be interrupted by using the block (3) interrupt pin line.

2. The device according to claim 1, wherein the pole line (31) connected line (35) ground hosts the high-speed block (36) switch grounding for quick connect pole line (31) with the electrode (37) emergency ground.

3. The device according to claim 2, characterized in that on both sides of the line (35) and ground block (32) interrupt pin line posted by the appropriate unit (33, 34) end pole line.

4. Device according to any one of claims 1 to 3, characterized in that the main line (11, 21) and return line (12, 22) of each Converter block (1, 4) are connected to each other through a bypass line (15, 25), each bypass line (15, 25) is interrupted by a block (16, 26) end shunt line.

5. Device according to any one of claims 1 to 3, characterized in that between the output pole line (31) and output connectors (38) in each return line (12, 22) is placed a block (18, 28) interrupt return line, and each block (18, 28) interrupt return line may be separated by placed on both sides of the blocks (17, 19; 27, 29) disconnect the return line.

6. The device according to claim 5, characterized in that is provided by the connector (38), interrupted by a block of (39) disconnect the connector, which is connected to a return line (12, 22) on protivopolojnih Converter blocks (1,4) sides of the blocks (19, 29) disconnect the return line, the opposite conversion blocks (1, 4).

7. The device according to claim 4, characterized in that between the output pole line (31) and output connectors (38) in each return line (12, 22) is placed a block (18, 28) interrupt return line, and each block (18, 28) interrupt return line may be separated by placed on both sides of the blocks (17, 19; 27, 29) disconnect the return line.

8. The device according to claim 7, characterized in that is provided by the connector (38), interrupted by a block of (39) disconnect the connector, which is connected to a return line (12, 22) on the opposite conversion blocks (1, 4) sides of the blocks (19, 29) disconnect the return line, the opposite conversion blocks (1, 4).