CN202034483U - Sea water direct current earth electrode device - Google Patents
Sea water direct current earth electrode device Download PDFInfo
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- CN202034483U CN202034483U CN2011200893889U CN201120089388U CN202034483U CN 202034483 U CN202034483 U CN 202034483U CN 2011200893889 U CN2011200893889 U CN 2011200893889U CN 201120089388 U CN201120089388 U CN 201120089388U CN 202034483 U CN202034483 U CN 202034483U
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- direct current
- seawater
- monomer
- pole device
- distributing cabinet
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Abstract
The utility model relates to a sea water direct current earth electrode device, which comprises a plurality of earth terminal units and wire distribution cabinets, wherein the earth terminal units are distributed in sea water in groups; each group of earth terminal units is integrally connected to first wire distribution cabinets; a plurality of first wire distribution cabinets are integrally connected to a second wire distribution cabinet through drainage cables; the second wire distribution cabinet is connected with a current dividing bus; each earth terminal unit comprises two electrodes and a concrete trough box rack; and the electrodes are fixed on the concrete trough box rack at intervals. In the sea water direct current earth electrode device, the influence on an intensive alternating current system and an underground structure at coastal areas during the running of the direct current single electrodes is reduced, and the influence is reduced by arranging earth electrodes in the sea water.
Description
Technical field
The utility model relates to direct current transportation technology and direct current grounding pole technology, particularly a kind of seawater direct current grounding pole device.
Background technology
Direct current transportation is the alternating current that the power plant is sent, and is transformed into direct current through rectifier and is delivered to receiving end, with inverter direct current is transformed into a kind of power transmission mode that alternating current is delivered to the receiving end AC network again.Be mainly used in the networking of remote high-power transmission of electricity and asynchronous AC system, have track investment few, do not have the system stability problem, regulate advantages such as quick, reliable.
Following advantage has been compared in direct current transportation with ac transmission:
1, when carrying equal-wattage, the DC line cost is low, and the overhead transmission line tower structure is simpler, and the circuit corridor is narrow, can run on higher voltage with the cable of insulation level.
2, the power of direct current transportation and energy loss are little.
3, little to Communication Jamming.
Do not have capacitance current when 4, line steady-state moves, do not have the reactance pressure drop, voltage along the line distributes more steady, and circuit itself need not reactive power compensation.
5, the two ends AC system of DC transmission line contact does not need synchronous operation, therefore can be in order to realize the asynchronous contact between different frequency or the same frequency AC system.
6, there is not the intrinsic stable problem of ac transmission in DC transmission line itself, and fed distance and power are not subjected to the restriction of electric power system synchronous operation stability yet.
7, the AC system capacity of short circuit separately that is interknited by DC transmission line can not enlarge markedly because of interconnected.
8, the adjusting control ratio of the power of DC transmission line and electric current is easier to and rapidly, can realizes various adjustings, control.If the AC and DC paired running, the operation characteristic that helps to improve the stability of AC system and improve whole system.
The development of direct current transportation also is subjected to the restriction of some factors.At first, the current conversion station of direct current transportation requires high than electric substation's complexity, cost height, the operational management of AC system; Secondly, a large amount of reactive power compensation of current converter (rectification and inversion) needs in service can reach 40%～60% of direct current transmission power when normally moving; Current converter is in operation and all can produces harmonic wave in AC side and DC side, install filter; When direct current transportation is done the loop with the earth or seawater, can cause the corrosion of hardware on the way, need safeguard procedures.Develop the multiterminal direct current transportation, need development high voltage direct current circuit breaker.
Direct current transportation fast development at home at present, because East China and Coastal Areas of South China have a plurality of direct current grounding poles as receiving end, when moving, the direct current one pole can impact, by arranging that in seawater earth electrode can reduce this influence locality intensive network system and underground structure.
In view of this, seek a kind of seawater direct current grounding pole device and become pursuing one's goal of these those skilled in the art.
Summary of the invention
Task of the present utility model provides a kind of seawater direct current grounding pole device, it has overcome the difficulty of prior art, can intensive AC system and the underground structure when the coastal area be impacted when having reduced the operation of direct current one pole, by arranging that in seawater earth electrode has then reduced this influence.
Technical solution of the present utility model is as follows:
A kind of seawater direct current grounding pole device comprises: some grounding terminals monomers and distributing cabinet;
Described grounding terminals monomer is distributed in the seawater with block form, and every group of set is connected to first distributing cabinet, and several first distributing cabinets are connected to second distributing cabinet by the leading cable set, connects the shunting bus on second distributing cabinet;
Described grounding terminals monomer comprises two electrodes and concrete pit box frame, and described electrode separation is fixed on the concrete pit box frame.
Described concrete pit box frame is the four sides structure, and concrete pit box frame is provided with some hollow outs and connects the zone.
Described electrode is fixed on the relative two sides of concrete pit box frame, is parallel to each other between the electrode.
Described grounding terminals monomer is one group with four and connects first distributing cabinet.
Described first distributing cabinet is that one group of set is connected to second distributing cabinet with three.
Described grounding terminals monomer linearly shape is arranged.
Described grounding terminals monomer is semi-circular arrangement.
Described grounding terminals monomer circular array.
The utility model is owing to adopted above technical scheme, make it compared with prior art, when having reduced the operation of direct current one pole, seawater direct current grounding pole device of the present utility model can intensive AC system and the underground structure when the coastal area be impacted, by arranging that in seawater earth electrode has then reduced this influence.
Description of drawings
Fig. 1 is the structural representation of grounding terminals monomer in a kind of seawater direct current grounding pole device of the present utility model.
Fig. 2 is the schematic diagram that Fig. 1 grounding terminals monomer is arranged with linear.
Fig. 3 is the schematic diagram of Fig. 1 grounding terminals monomer to be circular layout.
Reference numeral:
1 is the grounding terminals monomer, and 2 is leading cable, and 3 is first distributing cabinet, and 4 are the shunting bus, and 5 is electrode, and 6 is concrete pit box frame, and 7 for hollow out connects the zone, and 8 is second distributing cabinet.
Embodiment
Below in conjunction with drawings and Examples the utility model is elaborated.
Referring to Fig. 1 to Fig. 3, the utility model provides a kind of seawater direct current grounding pole device, mainly is made up of some grounding terminals monomers 1 and distributing cabinet.
Concrete pit box frame 6 is the four sides structure, some hollow outs is set on the concrete pit box frame 6 connects zone 7.Electrode 5 is fixed on the relative two sides of concrete pit box frame 6, is parallel to each other between two electrodes 5.Grounding terminals monomer 1 is one group with four and connects first distributing cabinet 3.First distributing cabinet 3 is that one group of set is connected to second distributing cabinet 8 with three.Grounding terminals monomer 1 linearly shape is arranged, or is semi-circular arrangement, or circular array.
Seawater direct current grounding pole device of the present utility model can be taked following mode in actual applications:
Shanghai and coastal area, Guangdong all are the receiving end electrical networks of direct current transportation at present, straight inflow place is arranged many times, present earth electrode all is arranged in the land, and two areas all are domestic most developed areas, AC network and underground metallic conduit are intensive on the ground, in order to reduce the influence of the big earthed return operation of direct current one pole to surrounding enviroment, the utility model is arranged in ground connection in the seawater with the direct current grounding pole device.
This direct current seawater earth electrode is applied in the DC transmission system, as shown in Figure 1, comprise a plurality of grounding terminals monomers and the leading cable that is connected with each grounding terminals monomer, wherein, a plurality of grounding terminals monomers linearly shape (Fig. 2), semi-circular or annular (Fig. 3) are distributed in the seawater.
Above-mentioned a plurality of grounding terminals monomer is distributed in the seawater with block form, and each grouping can also be by distributing cabinet set.
Arrange that in seawater earth electrode need prevent the influence of morning and evening tides, wave, consider the corrosion of seawater simultaneously, its structure and land earth electrode are different.
The seawater earth electrode is placed on the place of offshore limit certain distance, mainly is to guarantee that earth electrode is still in seawater when low water level.The grounding terminals monomer is placed in the concrete pit box that is fixed in the seabed, and earth electrode terminal monomer can be soaked in the seawater fully, can big displacement not take place because of the impact of wave simultaneously.
In sum, when having reduced the operation of direct current one pole, seawater direct current grounding pole device of the present utility model can intensive AC system and the underground structure when the coastal area be impacted, by arranging that in seawater earth electrode has then reduced this influence.
Certainly, those skilled in the art in the present technique field will be appreciated that, the foregoing description only is to be used for illustrating the utility model, and be not with opposing qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in the scope of the utility model claim the variation of the foregoing description, modification etc.
Claims (8)
1. a seawater direct current grounding pole device is characterized in that, comprising: some grounding terminals monomers and distributing cabinet;
Described grounding terminals monomer is distributed in the seawater with block form, and every group of set is connected to first distributing cabinet, and several first distributing cabinets are connected to second distributing cabinet by the leading cable set, connects the shunting bus on second distributing cabinet;
Described grounding terminals monomer comprises two electrodes and concrete pit box frame, and described electrode separation is fixed on the concrete pit box frame.
2. seawater direct current grounding pole device as claimed in claim 1 is characterized in that: described concrete pit box frame is the four sides structure, and concrete pit box frame is provided with some hollow outs and connects the zone.
3. seawater direct current grounding pole device as claimed in claim 2 is characterized in that: described electrode is fixed on the relative two sides of concrete pit box frame, is parallel to each other between the electrode.
4. seawater direct current grounding pole device as claimed in claim 1 is characterized in that: described grounding terminals monomer is one group with four and connects first distributing cabinet.
5. seawater direct current grounding pole device as claimed in claim 1 is characterized in that: described first distributing cabinet is that one group of set is connected to second distributing cabinet with three.
6. seawater direct current grounding pole device as claimed in claim 1 is characterized in that: described grounding terminals monomer linearly shape is arranged.
7. seawater direct current grounding pole device as claimed in claim 1 is characterized in that: described grounding terminals monomer is semi-circular arrangement.
8. seawater direct current grounding pole device as claimed in claim 1 is characterized in that: described grounding terminals monomer circular array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200893889U CN202034483U (en) | 2011-03-31 | 2011-03-31 | Sea water direct current earth electrode device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200893889U CN202034483U (en) | 2011-03-31 | 2011-03-31 | Sea water direct current earth electrode device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202034483U true CN202034483U (en) | 2011-11-09 |
Family
ID=44896771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200893889U Expired - Lifetime CN202034483U (en) | 2011-03-31 | 2011-03-31 | Sea water direct current earth electrode device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202034483U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106021866A (en) * | 2016-05-10 | 2016-10-12 | 清华大学 | Method for carrying out uniform calculation on influences, caused by DC grounding electrodes, on AC power grids and oil-gas pipelines |
| CN111509420A (en) * | 2020-04-24 | 2020-08-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Horizontal ocean grounding electrode with roundabout arrangement |
-
2011
- 2011-03-31 CN CN2011200893889U patent/CN202034483U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106021866A (en) * | 2016-05-10 | 2016-10-12 | 清华大学 | Method for carrying out uniform calculation on influences, caused by DC grounding electrodes, on AC power grids and oil-gas pipelines |
| CN106021866B (en) * | 2016-05-10 | 2018-07-24 | 清华大学 | The unified calculation method that direct current grounding pole influences AC network and oil-gas pipeline |
| CN111509420A (en) * | 2020-04-24 | 2020-08-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Horizontal ocean grounding electrode with roundabout arrangement |
| CN111509420B (en) * | 2020-04-24 | 2021-09-17 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Horizontal ocean grounding electrode with roundabout arrangement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111109 |
|
| CX01 | Expiry of patent term |