CN203707706U - Ice-melting device for grounding electrode lead based on bipolar unbalanced current - Google Patents
Ice-melting device for grounding electrode lead based on bipolar unbalanced current Download PDFInfo
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- CN203707706U CN203707706U CN201320822451.4U CN201320822451U CN203707706U CN 203707706 U CN203707706 U CN 203707706U CN 201320822451 U CN201320822451 U CN 201320822451U CN 203707706 U CN203707706 U CN 203707706U
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- side converter
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- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 238000009499 grossing Methods 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses an ice-melting device for an earth electrode lead based on a bipolar unbalanced current. The device comprises a first pole rectifying side converter valve group, a first pole inverting side converter valve group, a second pole rectifying side converter valve group, a second pole inverting side converter valve group, a first pole power transmission line, a second pole power transmission line, a first grounding electrode lead, and a second grounding electrode lead. The other end of the first pole rectifying side converter valve group is connected with the first grounding electrode lead through a first circuit breaker. The other end of the second pole rectifying side converter valve group is connected with the first grounding electrode lead through a third circuit breaker. The other end of the first pole inverting side converter valve group is connected with the second grounding electrode lead through a second circuit breaker. The other end of the second pole inverting side converter valve group is connected with the second grounding electrode lead through a fourth circuit breaker. The device provided by the utility model does not limit the direct-current available power, does not change the wiring mode of a direct-current circuit, is convenient to operate, and needs a short time to recover the normal operation of two poles.
Description
Technical field
The utility model relates to high-voltage dc transmission electrical domain, the device that especially a kind of lead-in wire of the earth electrode to super high voltage direct current electricity transmission system adopts bipolar unsymmetrical current to carry out ice-melt.
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 a kind of lead-in wire of the earth electrode based on bipolar unsymmetrical current deicing device, can not change on the basis of original circuit, by applying different power and circuit breaker and disconnecting link controlled bipolar, be grounded the ice-melt of utmost point lead-in wire, do not limit the available horsepower of direct current, more convenient in operation.
For realizing above object, the technical scheme that the utility model is taked is:
Earth electrode lead-in wire deicing device based on bipolar unsymmetrical current, described earth electrode lead-in wire deicing device 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 the first utmost point rectification side converter valve group, between one end and the second DC filter of the first utmost point inversion side converter valve group, between one end and the 3rd DC filter of the second utmost point rectification side converter valve group, and be connected with respectively the first smoothing reactor between one end of 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 earth electrode lead-in wire deicing device 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, 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, the other end utmost point 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, 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.
Described earth electrode lead-in wire deicing device 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 earth electrode lead-in wire deicing device 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 on the first earth electrode lead-in wire, 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 on the first earth electrode lead-in wire; One end of four blade lock is connected between the 7th disconnecting link and the 8th disconnecting link, and the other end is connected in the second earth electrode lead-in wire above, and one end of the second disconnecting link is connected between four blade lock and the 8th disconnecting link, and the other end is connected on the second earth electrode lead-in wire.
Described earth electrode lead-in wire deicing device 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, reliability is higher, and there is the situation of earth electrode broken string in the time of unbalanced operation time, protection can be asked bipolar balance movement, recovers bipolar balance movement; 2, do not limit the available horsepower of direct current; 3, can not change the mode of connection of DC line, more convenient in operation, while recovering bipolar normal operation, need the time shorter.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the earth electrode lead-in wire deicing device of the utility model based on bipolar unsymmetrical current.
Wherein: 11, the first utmost point rectification side converter valve group; 12, the first utmost point inversion side converter valve group; 21, the second utmost point rectification side converter valve group; 22, the second utmost point inversion side converter valve group; 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, the earth electrode lead-in wire deicing device based on bipolar unsymmetrical current, this earth electrode lead-in wire deicing device 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 21, the second utmost point inversion side converter valve group 22, 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 21, the two ends of the second utmost point inversion side converter valve group 22 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 21 and the second utmost point inversion side converter valve group 22 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 one end and DC filter 42 of the first utmost point inversion side converter valve group 12, between one end and DC filter 43 of the second utmost point rectification side converter valve group 21, and be connected with respectively smoothing reactor 31 between one end of the second utmost point inversion side converter valve group 22 and DC filter 44, smoothing reactor 32, smoothing reactor 33, Siping City's wave reactor 34.
This earth electrode lead-in wire deicing device also comprises earth electrode lead-in wire 71 and earth electrode lead-in wire 72, 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, the other end of the second utmost point rectification side converter valve group 21 is connected with earth electrode lead-in wire 71 by a circuit breaker 53, 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 a circuit breaker 52, the other end of the second utmost point inversion side converter valve group 22 is connected with earth electrode lead-in wire 72 by a circuit breaker 54.
This earth electrode lead-in wire deicing device 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 earth electrode lead-in wire deicing device 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 on earth electrode lead-in wire 71, one end of disconnecting link 61 is connected between disconnecting link 63 and circuit breaker 55, and the other end is connected on earth electrode lead-in wire 71; One end of disconnecting link 64 is connected between disconnecting link 67 and disconnecting link 68, and the other end is connected on earth electrode lead-in wire 72, and one end of disconnecting link 62 is connected between disconnecting link 64 and disconnecting link 68, and the other end is connected on earth electrode lead-in wire 72.
This earth electrode lead-in wire deicing device 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 to earth electrode go between 71 and earth electrode lead-in wire 72 carry out ice-melt simultaneously, when ice-melt, close circuit breaker 51, circuit breaker 52, circuit breaker 53, circuit breaker 54 and earth electrode circuit breaker 711 and isolating switch 721, simultaneously, disconnect disconnecting link 61, disconnecting link 62, disconnecting link 63, disconnecting link 64, adjust the performance number of the first utmost point rectification side converter valve group 11 and the second utmost point rectification side converter valve group 21, the power of the two (is not for example waited, the performance number of the first utmost point rectification side converter valve group 11 and the second utmost point rectification side converter valve group 21 is respectively 1500MW and 150MW), thereby therefore bipolar imbalance, and the voltage of first utmost point transmission line 91 and the second utmost point transmission line 92 equates, opposite direction, 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, and the electric current of the second utmost point inversion side converter valve group 22 is by the second utmost point transmission line 92, the second utmost point rectification side converter valve group 21 is to earth electrode lead-in wire 71, thereby making all has electric current to flow through (under rated power on earth electrode lead-in wire 71 and earth electrode lead-in wire 72, maximum current is 2700A), realize ice-melt by circuit thermal effect.
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. the lead-in wire of the earth electrode based on bipolar unsymmetrical current deicing device, it 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 (21), the second utmost point inversion side converter valve group (22), 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 (21), the two ends of the second utmost point inversion side converter valve group (22) 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 (21) and the second utmost point inversion side converter valve group (22) is connected to the two ends of the second utmost point transmission line (92), between one end of the first utmost point rectification side converter valve group (11) and the first DC filter (41), between one end of the first utmost point inversion side converter valve group (12) and the second DC filter (42), between one end of the second utmost point rectification side converter valve group (21) and the 3rd DC filter (43), and be connected with respectively the first smoothing reactor (31) between one end of the second utmost point inversion side converter valve group (22) 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 earth electrode lead-in wire deicing device further comprises the first earth electrode lead-in wire (71) and the second earth electrode lead-in wire (72), 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 rectification side converter valve group (11) by one first circuit breaker (51) and the first earth electrode go between (71) be connected, the other end of the second utmost point rectification side converter valve group (21) by one the 3rd circuit breaker (53) and the first earth electrode go between (71) be connected, the other end utmost point of described the first utmost point inversion side converter valve group (12) by one second circuit breaker (52) and the second earth electrode go between (72) be connected, the other end of the second utmost point inversion side converter valve group (22) by one the 4th circuit breaker (54) and the second earth electrode go between (72) be connected.
2. the lead-in wire of the earth electrode based on bipolar unsymmetrical current deicing device according to claim 1, it is characterized in that, this earth electrode lead-in wire deicing device 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. the lead-in wire of the earth electrode based on bipolar unsymmetrical current deicing device according to claim 2, it is characterized in that, described earth electrode lead-in wire deicing device 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 on the first earth electrode lead-in wire (71), 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 in, one end of four blade lock (64) is connected between the 7th disconnecting link (67) and the 8th disconnecting link one earth electrode lead-in wire (71) upper (68), the other end is connected on the second earth electrode lead-in wire (72), 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 on the second earth electrode lead-in wire (72).
4. according to the lead-in wire of the earth electrode based on the bipolar unsymmetrical current deicing device described in claim 1-3 any one, it is characterized in that, described earth electrode lead-in wire deicing device 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 |
|---|---|---|---|
| CN201320822451.4U CN203707706U (en) | 2013-12-12 | 2013-12-12 | Ice-melting device for grounding electrode lead based on bipolar unbalanced current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320822451.4U CN203707706U (en) | 2013-12-12 | 2013-12-12 | Ice-melting device for grounding electrode lead based on bipolar unbalanced current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203707706U true CN203707706U (en) | 2014-07-09 |
Family
ID=51058088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320822451.4U Expired - Lifetime CN203707706U (en) | 2013-12-12 | 2013-12-12 | Ice-melting device for grounding electrode lead based on bipolar unbalanced current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203707706U (en) |
-
2013
- 2013-12-12 CN CN201320822451.4U patent/CN203707706U/en not_active Expired - Lifetime
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| CX01 | Expiry of patent term |
Granted publication date: 20140709 |
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| CX01 | Expiry of patent term |