CN203607798U - Ice melting device for earth electrode lead in ultra-high-voltage DC power transmission system - Google Patents
Ice melting device for earth electrode lead in ultra-high-voltage DC power transmission system Download PDFInfo
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- CN203607798U CN203607798U CN201320772325.2U CN201320772325U CN203607798U CN 203607798 U CN203607798 U CN 203607798U CN 201320772325 U CN201320772325 U CN 201320772325U CN 203607798 U CN203607798 U CN 203607798U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 49
- 238000002844 melting Methods 0.000 title abstract description 4
- 230000008018 melting Effects 0.000 title abstract description 4
- 230000005611 electricity Effects 0.000 claims description 25
- 238000009499 grossing Methods 0.000 claims description 23
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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Abstract
The utility model discloses an ice melting device for an earth electrode lead in an ultra-high-voltage DC power transmission system. The device comprises a first electrode rectification side converter valve set, a first electrode inversion side converter valve set, a second electrode rectification side converter valve set, a second electrode inversion side converter valve set, a first electrode power transmission line, a second electrode power transmission line, a first earth electrode lead and a second earth electrode lead. The other end of the first electrode rectification side converter valve set is connected to the first earth electrode lead via a first breaker and an eleventh knife brake. The other end of the second electrode rectification side converter valve set is connected to the first earth electrode lead via a third breaker and a ninth knife brake. The other end of the first electrode inversion side converter valve set is connected to the second earth electrode lead via a second breaker and a twelfth knife brake. The other end of the second electrode inversion side converter valve set is connected to the second earth electrode lead via a fourth breaker and a tenth knife brake. The transmission capacity during ice melting is small, and thus impact to the system is small if single-stage blocking happens.
Description
Technical field
The utility model relates to high-voltage dc transmission electrical domain, especially a kind of earth electrode to super high voltage direct current electricity transmission system device that carries out ice-melt that goes between.
Background technology
Rapidly, sending end current conversion station focuses mostly at northwestward extremely frigid zones in high voltage direct current transmission development in recent years, and winter, certain icing situation all appearred in DC power transmission line and earth electrode lead-in wire.Ground path icing can cause conductor galloping, shaft tower inclination, the faults such as tower, broken string and insulator arc-over of falling.Because of the difference of DC operation mode, ground path broken string, the tower that falls may cause 3 kinds of different situations: if 1 in DC operation when bipolar fashion (BP), there is broken string or fall the situation of tower in earth electrode lead-in wire.The mode that now operational mode will become the neutral ground of bipolar one end is moved, in this manner operation; In the time that a utmost point line failure is deactivated, the whole bipolar DC system of must stopping transport, does not have the possibility of monopolar operation; In the time that a utmost point converter breaks down, can automatically not transfer single-stage Ground return mode to yet and move, can only after bipolar stoppage in transit, be configured to just can resume operation after single-stage metallic return mode.So very large reduction DC operation reliable, system stability is also had to more serious harm; If 2 DC operation are in the time of single-stage Ground return mode (GR), there is broken string or fall the situation of tower in earth electrode lead-in wire, and direct current system will lose ground return circuit, shine into DC system locking; If 3 DC operation are in the time of single-stage metallic return mode (MR), there is broken string or fall the situation of tower in earth electrode lead-in wire.Direct current system operation will can not be affected.But direct current system can only keep this kind of mode to move, can not carry out the conversion of all the other operational modes, affect the flexibility of DC operation.
Therefore,, when icing appears in earth electrode lead-in wire, it is carried out to ice-melt is necessary.But the existing method to the ice-melt of earth electrode lead-in wire is by auxiliary lead-in wire mostly, in addition external power supply is connected on earth electrode lead-in wire, carry out ice-melt by circuit thermal effect, although this mode can fundamentally be removed the icing on earth electrode lead-in wire, its operation and cost are higher.
Utility model content
For above deficiency, the utility model provides earth electrode lead-in wire deicing device in a kind of super high voltage direct current electricity transmission system, can not change on the basis of original circuit, by circuit breaker and disconnecting link are controlled, be grounded the ice-melt of utmost point lead-in wire, the capacity transmitting in deicing processes is less, as occurs single-stage locking, less to the impact of system.
For realizing above object, the technical scheme that the utility model is taked is:
Earth electrode lead-in wire deicing device in super high voltage direct current electricity transmission system, described super high voltage direct current electricity transmission system comprises the first utmost point rectification side converter valve group, the first utmost point inversion side converter valve group, the second utmost point rectification side converter valve group, the second utmost point inversion side converter valve group, the first utmost point transmission line and the second utmost point transmission line, wherein, the first utmost point rectification side converter valve group, the first utmost point inversion side converter valve group, the second utmost point rectification side converter valve group, the two ends of the second utmost point inversion side converter valve group respectively and be connected to the first DC filter, the second DC filter, the 3rd DC filter, the 4th DC filter, one end of one end of the first utmost point rectification side converter valve group and the first utmost point inversion side converter valve group is connected to the two ends of the first utmost point transmission line, one end of one end of the second utmost point rectification side converter valve group and the second utmost point inversion side converter valve group is connected to the two ends of the second utmost point transmission line, between one end and the first DC filter of described the first utmost point rectification side converter valve group, between one end and the second DC filter of described the first utmost point inversion side converter valve group, between one end and the 3rd DC filter of described the second utmost point rectification side converter valve group, and be connected with respectively the first smoothing reactor between one end of described the second utmost point inversion side converter valve group and the 4th DC filter, the second smoothing reactor, the 3rd smoothing reactor, Siping City's wave reactor, described super high voltage direct current electricity transmission system further comprises the first earth electrode lead-in wire and the second earth electrode lead-in wire, described the first earth electrode lead-in wire and the second earth electrode lead-in wire are connected with respectively earth electrode circuit breaker and an isolating switch, the other end of described the first utmost point rectification side converter valve group is connected with the first earth electrode lead-in wire by one first circuit breaker and the 11 disconnecting link, the other end of the second utmost point rectification side converter valve group is connected with the first earth electrode lead-in wire by one the 3rd circuit breaker and the 9th disconnecting link, the other end of described the first utmost point inversion side converter valve group is connected with the second earth electrode lead-in wire by one second circuit breaker and the 12 disconnecting link, the other end of the second utmost point inversion side converter valve group is connected with the second earth electrode lead-in wire by one the 4th circuit breaker and the tenth disconnecting link.
Described super high voltage direct current electricity transmission system further comprises one first connecting line and the second connecting line, one end of described the first connecting line is connected between the first smoothing reactor and the first DC filter, the other end is connected between the 3rd smoothing reactor and the 3rd DC filter, one end of described the second connecting line is connected between the second smoothing reactor and the second DC filter, the other end is connected between Siping City's wave reactor and the 4th DC filter, described the first connecting line is provided with the 5th disconnecting link and the 6th disconnecting link, described the second connecting line is provided with the 7th disconnecting link and the 8th disconnecting link.
Described super high voltage direct current electricity transmission system further comprises the first disconnecting link, the second disconnecting link, the 3rd disconnecting link, four blade lock and the 5th circuit breaker, wherein, after the 3rd disconnecting link and the series connection of the 5th circuit breaker, one end is connected between the 5th disconnecting link and the 6th disconnecting link, the other end is connected between the 3rd circuit breaker and the 9th disconnecting link, one end of the first disconnecting link is connected between the 3rd disconnecting link and the 5th circuit breaker, and the other end is connected between the first circuit breaker and the 11 disconnecting link; One end of four blade lock is connected between the 7th disconnecting link and the 8th disconnecting link, the other end is connected between the 4th circuit breaker and the tenth disconnecting link, one end of the second disconnecting link is connected between four blade lock and the 8th disconnecting link, and the other end is connected between the 12 disconnecting link and the second circuit breaker.
Described super high voltage direct current electricity transmission system further comprises the first earthing breaker, the second earthing breaker and the first grounding switch and the second grounding switch, wherein, one end ground connection after the first earthing breaker and the series connection of the first grounding switch, the other end is connected on the first earth electrode lead-in wire, one end ground connection after the second earthing breaker and the series connection of the second grounding switch, the other end is connected on the second earth electrode lead-in wire.
Compared with prior art, tool has the following advantages the utility model: 1, maximum earth electrode lead-in wire ice melting current can be provided, and when 1.2 times of overloads, maximum can be 3600A; 2, the capacity transmitting in deicing processes is less, as occurs single-stage locking, less to the impact of system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of earth electrode lead-in wire deicing device in the utility model super high voltage direct current electricity transmission system.
Wherein: 11, the first utmost point rectification side converter valve group; 12, the first utmost point inversion side converter valve group; 13, the second utmost point rectification side converter valve group; 14, the second utmost point inversion side converter valve group; 21, disconnecting link; 22, disconnecting link; 23, disconnecting link; 24, disconnecting link; 31, smoothing reactor; 32, smoothing reactor; 33, smoothing reactor; 34, smoothing reactor; 41, DC filter; 42, DC filter; 43, DC filter; 44, DC filter; 51, circuit breaker; 52, circuit breaker; 53, circuit breaker; 54, circuit breaker; 55, circuit breaker; 61, disconnecting link; 62, disconnecting link; 63, disconnecting link; 64, disconnecting link; 65, disconnecting link; 66, disconnecting link; 67, disconnecting link; 68, disconnecting link; 71, earth electrode lead-in wire; 711, earth electrode circuit breaker; 72, earth electrode lead-in wire; 721, isolating switch; 81, earthing breaker; 82, earthing breaker; 83, grounding switch; 84, grounding switch; 91, the first utmost point transmission line; 92, the second utmost point transmission line.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present utility model is described in further details.
Embodiment
Please refer to shown in Fig. 1, earth electrode lead-in wire deicing device in super high voltage direct current electricity transmission system, this super high voltage direct current electricity transmission system comprises the first utmost point rectification side converter valve group 11, the first utmost point inversion side converter valve group 12, the second utmost point rectification side converter valve group 13, the second utmost point inversion side converter valve group 14, the first utmost point transmission line 91 and the second utmost point transmission line 92, wherein, the first utmost point rectification side converter valve group 11, the first utmost point inversion side converter valve group 12, the second utmost point rectification side converter valve group 13, the two ends of the second utmost point inversion side converter valve group 14 respectively and be connected to DC filter 41, DC filter 42, DC filter 43, DC filter 44, one end of one end of the first utmost point rectification side converter valve group 11 and the first utmost point inversion side converter valve group 12 is connected to the two ends of the first utmost point transmission line 91, one end of one end of the second utmost point rectification side converter valve group 13 and the second utmost point inversion side converter valve group 14 is connected to the two ends of the second utmost point transmission line 92, between one end and DC filter 41 of the first utmost point rectification side converter valve group 11, between the other end and DC filter 42 of the first utmost point inversion side converter valve group 12, between the other end and DC filter 43 of the second utmost point rectification side converter valve group 13, and be connected with respectively smoothing reactor 31 between one end of the second utmost point inversion side converter valve group 14 and DC filter 44, smoothing reactor 32, smoothing reactor 33, Siping City's wave reactor 34.
This super high voltage direct current electricity transmission system also comprises earth electrode lead-in wire 71 and earth electrode lead-in wire 72, and earth electrode lead-in wire 71 and earth electrode lead-in wire 72 are connected with respectively an earth electrode circuit breaker 711 and isolating switch 721.The other end of the first utmost point rectification side converter valve group 11 is connected with earth electrode lead-in wire 71 by circuit breaker 51 and disconnecting link 23, the other end of the second utmost point rectification side converter valve group 13 is connected with earth electrode lead-in wire 71 by a circuit breaker 53 and disconnecting link 21, the other end utmost point of the first utmost point inversion side converter valve group 12 is connected with earth electrode lead-in wire 72 by circuit breaker 52 and disconnecting link 24, and the other end of the second utmost point inversion side converter valve group 14 is connected with earth electrode lead-in wire 72 by circuit breaker 54 and disconnecting link 22.
This super high voltage direct current electricity transmission system further comprises two connecting lines, wherein one end of first connecting line is connected between smoothing reactor 31 and DC filter 41, the other end is connected between smoothing reactor and DC filter 43, one end of another connecting line is connected between smoothing reactor 32 and DC filter 42, the other end is connected between smoothing reactor 34 and DC filter 44, first connecting line is provided with disconnecting link 65 and disconnecting link 66, and another connecting line is provided with disconnecting link 67 and disconnecting link 68.
This super high voltage direct current electricity transmission system further comprises disconnecting link 61, disconnecting link 62, disconnecting link 63, disconnecting link 64 and circuit breaker 55, wherein, after disconnecting link 63 and circuit breaker 55 series connection, one end is connected between disconnecting link 65 and disconnecting link 66, the other end is connected between circuit breaker 53 and disconnecting link 21, one end of disconnecting link 61 is connected between disconnecting link 63 and circuit breaker 55, and the other end is connected between circuit breaker 51 and disconnecting link 23; One end of disconnecting link 64 is connected between disconnecting link 67 and disconnecting link 68, and the other end is connected between the 4th circuit breaker 54 and disconnecting link 22, and one end of disconnecting link 62 is connected between disconnecting link 64 and disconnecting link 68, and the other end is connected between disconnecting link 24 and circuit breaker 52.
This super high voltage direct current electricity transmission system further comprises earthing breaker 81, earthing breaker 82 and grounding switch 83 and grounding switch 84, wherein, one end ground connection after earthing breaker 81 and grounding switch 83 series connection, the other end is connected on earth electrode lead-in wire 71, one end ground connection after earthing breaker 82 and grounding switch 84 series connection, the other end is connected on earth electrode lead-in wire 72.
Operation principle: can select the first polar curve road or the second polar curve road to carry out ice-melt to earth electrode lead-in wire 71 and earth electrode lead-in wire 72, while selecting the first polar curve road to carry out ice-melt, close circuit breaker 51, circuit breaker 52, disconnecting link 23, disconnecting link 24 and earth electrode circuit breaker 711 and isolating switch 721, cut-off breaker 52, with circuit breaker 54 and disconnecting link 21 and disconnecting link 22, simultaneously, disconnect disconnecting link 61, disconnecting link 62, disconnecting link 63, disconnecting link 64, therefore, the electric current of the first utmost point rectification side converter valve group 11 is by the first utmost point transmission line 91, the first utmost point inversion side converter valve group 12 is to earth electrode lead-in wire 72, earth electrode lead-in wire 71 and earth electrode lead-in wire 72 have electric current and flow through (when 1.2 times of overloads, maximum can be 3600A), be grounded the ice-melt of utmost point lead-in wire by circuit thermal effect.In like manner, while selecting the second polar curve road to carry out ice-melt, close circuit breaker 53, circuit breaker 54, disconnecting link 21, disconnecting link 22 and earth electrode circuit breaker 711 and isolating switch 721, cut-off breaker 51, circuit breaker 53, disconnecting link 23 and disconnecting link 24, simultaneously, disconnect disconnecting link 61, disconnecting link 62, disconnecting link 63, disconnecting link 64, because first utmost point is contrary with the voltage direction of second utmost point, therefore, the electric current of the second utmost point inversion side converter valve group 14 is by the second utmost point transmission line 92, the second utmost point rectification side converter valve group 13 is to earth electrode lead-in wire 71, thereby making all has electric current to flow through on earth electrode lead-in wire 71 and earth electrode lead-in wire 72.Because all large than cathode conductor of the corona electromagnetic interference of positive wire and audible noise, simultaneously because thunder and lightning is mostly negative polarity, the probability of the lightning flash over of the positive wire making is also than the height of cathode conductor, so the utility model is selected the negative polarity mode of connection.
Above-listed detailed description is for the illustrating of the utility model possible embodiments, and this embodiment is not in order to limit protection range of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and all should be contained in the protection range of this case.
Claims (4)
1. earth electrode lead-in wire deicing device in super high voltage direct current electricity transmission system, described super high voltage direct current electricity transmission system comprises the first utmost point rectification side converter valve group (11), the first utmost point inversion side converter valve group (12), the second utmost point rectification side converter valve group (13), the second utmost point inversion side converter valve group (14), the first utmost point transmission line (91) and the second utmost point transmission line (92), wherein, the first utmost point rectification side converter valve group (11), the first utmost point inversion side converter valve group (12), the second utmost point rectification side converter valve group (13), the two ends of the second utmost point inversion side converter valve group (14) respectively and be connected to the first DC filter (41), the second DC filter (42), the 3rd DC filter (43), the 4th DC filter (44), one end of one end of the first utmost point rectification side converter valve group (11) and the first utmost point inversion side converter valve group (12) is connected to the two ends of the first utmost point transmission line (91), one end of one end of the second utmost point rectification side converter valve group (13) and the second utmost point inversion side converter valve group (14) is connected to the two ends of the second utmost point transmission line (92), between one end of described the first utmost point rectification side converter valve group (11) and the first DC filter (41), between one end of described the first utmost point inversion side converter valve group (12) and the second DC filter (42), between one end of described the second utmost point rectification side converter valve group (13) and the 3rd DC filter (43), and be connected with respectively the first smoothing reactor (31) between one end of described the second utmost point inversion side converter valve group (14) and the 4th DC filter (44), the second smoothing reactor (32), the 3rd smoothing reactor (33), Siping City's wave reactor (34), it is characterized in that, described super high voltage direct current electricity transmission system further comprises the first earth electrode lead-in wire (71) and the second earth electrode lead-in wire (72), the other end of described the first utmost point rectification side converter valve group (11) by one first circuit breaker (51) and the 11 disconnecting link (23) and the first earth electrode go between (71) be connected, the other end of the second utmost point rectification side converter valve group (13) by one the 3rd circuit breaker (53) and the 9th disconnecting link (21) and the first earth electrode go between (71) be connected, described the first earth electrode lead-in wire (71) and the second earth electrode lead-in wire (72) are connected with respectively an earth electrode circuit breaker (711) and isolating switch (721), the other end of described the first utmost point inversion side converter valve group (12) by one second circuit breaker (52) and the 12 disconnecting link (24) and the second earth electrode go between (72) be connected, the other end of the second utmost point inversion side converter valve group (14) by one the 4th circuit breaker (54) and the tenth disconnecting link (22) and the second earth electrode go between (72) be connected.
2. earth electrode lead-in wire deicing device in super high voltage direct current electricity transmission system according to claim 1, it is characterized in that, described super high voltage direct current electricity transmission system further comprises one first connecting line and the second connecting line, one end of described the first connecting line is connected between the first smoothing reactor (31) and the first DC filter (41), the other end is connected between the 3rd smoothing reactor (33) and the 3rd DC filter (43), one end of described the second connecting line is connected between the second smoothing reactor (32) and the second DC filter (42), the other end is connected between Siping City's wave reactor (34) and the 4th DC filter (44), described the first connecting line is provided with the 5th disconnecting link (65) and the 6th disconnecting link (66), described the second connecting line is provided with the 7th disconnecting link (67) and the 8th disconnecting link (68).
3. earth electrode lead-in wire deicing device in super high voltage direct current electricity transmission system according to claim 2, it is characterized in that, described super high voltage direct current electricity transmission system further comprises the first disconnecting link (61), the second disconnecting link (62), the 3rd disconnecting link (63), four blade lock (64), and the 5th circuit breaker (55), wherein, after the 3rd disconnecting link (63) and the series connection of the 5th circuit breaker (55), one end is connected between the 5th disconnecting link (65) and the 6th disconnecting link (66), the other end is connected between the 3rd circuit breaker (53) and the 9th disconnecting link (21), one end of the first disconnecting link (61) is connected between the 3rd disconnecting link (63) and the 5th circuit breaker (55), the other end is connected between the first circuit breaker (51) and the 11 disconnecting link (23), one end of four blade lock (64) is connected between the 7th disconnecting link (67) and the 8th disconnecting link (68), the other end is connected between the 4th circuit breaker (54) and the tenth disconnecting link (22), one end of the second disconnecting link (62) is connected between four blade lock (64) and the 8th disconnecting link (68), and the other end is connected between the 12 disconnecting link (24) and the second circuit breaker (52).
4. according to earth electrode lead-in wire deicing device in the super high voltage direct current electricity transmission system described in claim 1-3 any one, it is characterized in that, described super high voltage direct current electricity transmission system further comprises the first earthing breaker (81), the second earthing breaker (82) and the first grounding switch (83) and the second grounding switch (84), wherein, one end ground connection after the first earthing breaker (81) and the first grounding switch (83) series connection, the other end is connected on the first earth electrode lead-in wire (71), one end ground connection after the second earthing breaker (82) and the second grounding switch (84) series connection, the other end is connected on the second earth electrode lead-in wire (72).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320772325.2U CN203607798U (en) | 2013-11-29 | 2013-11-29 | Ice melting device for earth electrode lead in ultra-high-voltage DC power transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320772325.2U CN203607798U (en) | 2013-11-29 | 2013-11-29 | Ice melting device for earth electrode lead in ultra-high-voltage DC power transmission system |
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| CN203607798U true CN203607798U (en) | 2014-05-21 |
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| CN201320772325.2U Expired - Lifetime CN203607798U (en) | 2013-11-29 | 2013-11-29 | Ice melting device for earth electrode lead in ultra-high-voltage DC power transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406433A (en) * | 2016-01-23 | 2016-03-16 | 国网福建省电力有限公司 | Optimal power and capacity selection method of mobile battery energy storage DC-based deicing system |
| CN109412104A (en) * | 2018-10-10 | 2019-03-01 | 南方电网科学研究院有限责任公司 | A kind of anti-icing guarantor's line and de-icing method of Hybrid HVDC system line |
-
2013
- 2013-11-29 CN CN201320772325.2U patent/CN203607798U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406433A (en) * | 2016-01-23 | 2016-03-16 | 国网福建省电力有限公司 | Optimal power and capacity selection method of mobile battery energy storage DC-based deicing system |
| CN105406433B (en) * | 2016-01-23 | 2017-10-20 | 国网福建省电力有限公司 | The power of mobile battery energy storage direct current ice melting system and capacity optimum option method |
| CN109412104A (en) * | 2018-10-10 | 2019-03-01 | 南方电网科学研究院有限责任公司 | A kind of anti-icing guarantor's line and de-icing method of Hybrid HVDC system line |
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Granted publication date: 20140521 |