CN204720999U - A kind of high voltage direct current transmission ground electrode system - Google Patents
A kind of high voltage direct current transmission ground electrode system Download PDFInfo
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- CN204720999U CN204720999U CN201520469897.2U CN201520469897U CN204720999U CN 204720999 U CN204720999 U CN 204720999U CN 201520469897 U CN201520469897 U CN 201520469897U CN 204720999 U CN204720999 U CN 204720999U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The utility model discloses a kind of high voltage direct current transmission ground electrode system, comprise multiple-circuit line converting plant and Inverter Station, also comprise DC rectifier station and share neutral bus rod and Inverter Station shares neutral bus rod, described DC rectifier station shares the bus rod that neutral bus rod is connection each DC rectifier station earth electrode neutral line, described Inverter Station shares the bus rod that neutral bus rod is a connection each Inverter Station earth electrode neutral line, described DC rectifier station shares neutral bus rod and described Inverter Station shares between neutral bus rod by a metallic return connection, and arrange the neutral bus rod ground connection of DC rectifier station or Inverter Station.The utility model high voltage direct current transmission ground electrode system adopts and sets up bipolar metal center line completely, multiple-circuit line converting plant and Inverter Station share place's earth electrode, solve the difficult problem of earth electrode addressing, eliminate the problem that conventional ground electrode system list returns earth current; Bipolarly can run by secular disequilibrium, effectively eliminate the impact of shared grounding electrode systems earth current, operational mode is more flexible, saves and takes up an area, decrease corresponding operation maintenance work.
Description
Technical field
The utility model relates to high voltage dc transmission technology, more particularly, relates to a kind of high voltage direct current transmission ground electrode system.
Background technology
At present, what Domestic Direct Current Transmission engineering adopted is all bipolar two ends neutral grounding mode (abbreviation bipolar fashion), and the ground return circuit that two-terminal-grounding pole is formed is as the wire for subsequent use of transmission system.Due to the arbitrary monopolar ground return transmission system that extremely all can form an independent operating in bipolar, the sense of current of positive and negative polarities in earth-return is contrary, and earth current is the difference of bipolar current.Bipolar voltage and current is called bipolar symmetrical operation mode time all equal, be called the asymmetric operation mode of voltage or electric current time unequal.When bipolar current is equal, earth current is the unsymmetrical current at the two poles of the earth, is usually less than the l% of rated current.Therefore, when bipolar symmetric mode runs, the problems such as the galvano-cautery caused by earth current can substantially be eliminated.When bipolar current asymmetric operation, the electric current in the two poles of the earth is unequal, will produce larger earth current.Larger direct current flows through earth electrode constantly, for a long time can affect earth potential distribution, causes transformer to occur bias phenomenon, buried pipeline around accelerated corrosion, affects pipeline operations personal security.
In addition, along with expanding economy, the continuous increase of DC engineering, railway, pipeline etc. constantly increase, and the selection of earth electrode location is more and more difficult.Current eight times direct currents concentrate area, feed-in Pearl River Delta, and earth electrode is intensive, on earth electrode location is selected, face sizable difficulty.Therefore, be necessary to be optimized research to shape high voltage DC earthing pole system.
One Common Earthing Electrode and One Common Earthing Electrode group can make the DC transmission system operational mode of One Common Earthing Electrode flexible, improve direct current system reliability of operation, that reduces the larger direct current grounding pole of coverage affects source simultaneously, has obvious economic benefit and social benefit.
But shared grounding electrode systems still inevitable because of multiple direct current system be in monopolar ground return run produce the duration longer, the earth current that electric current is larger, the maximum temperature rise of One Common Earthing Electrode must be limited, avoid, because the overheated earth electrode that causes damages, having higher requirement to the High-Voltage Insulation performance of earth electrode simultaneously.
Utility model content
The purpose of this utility model is: provide a kind of high voltage direct current transmission ground electrode system, effective solution current DC bipolar two ends neutral grounding mode causes the problem of Grounding Grid with flowing into because of direct current, operational mode is more flexible simultaneously, and save and take up an area, the addressing of earth electrode is no longer difficult.
To achieve these goals, the utility model provides a kind of high voltage direct current transmission ground electrode system, comprise multiple-circuit line converting plant and Inverter Station, also comprise DC rectifier station and share neutral bus rod and Inverter Station shares neutral bus rod, described DC rectifier station shares the bus rod that neutral bus rod is connection each DC rectifier station earth electrode neutral line, described Inverter Station shares the bus rod that neutral bus rod is a connection each Inverter Station earth electrode neutral line, described DC rectifier station shares neutral bus rod and described Inverter Station shares between neutral bus rod by a metallic return connection, and arrange the neutral bus rod ground connection of DC rectifier station or Inverter Station.
Improve as one of the present utility model, each time DC rectifier station and Inverter Station utilize three wires to form DC side loop respectively, and wherein two is the polar curve of positive and negative polarities, and another root is the earth electrode neutral line of low insulation.
Improve as one of the present utility model, it is general distribution network overhead wire that described connection DC rectifier station shares the metallic return that neutral bus rod and Inverter Station share neutral bus rod.
Improve as one of the present utility model, each time DC rectifier station and Inverter Station share place's earth electrode.
Compared with prior art, the utility model high voltage direct current transmission ground electrode system adopts and sets up bipolar metal center line completely, multiple-circuit line converting plant and Inverter Station share place's earth electrode, solve the difficult problem of earth electrode addressing, eliminate the problem that conventional ground electrode system list returns earth current, on the other hand, bipolar can secular disequilibrium run, effectively eliminate the impact of shared grounding electrode systems earth current, operational mode is more flexible, save and take up an area, decrease corresponding operation maintenance work.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, structure of the present utility model and Advantageous Effects thereof are described in detail.
Fig. 1 is the composition schematic diagram of the utility model high voltage direct current transmission ground electrode system.
Embodiment
In order to make goal of the invention of the present utility model, technical scheme and Advantageous Effects thereof more clear, below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.Should be understood that, the embodiment described in this specification is only used to explain the utility model, is not intended to limit the utility model.
Refer to Fig. 1, the utility model high voltage direct current transmission ground electrode system comprises DC rectifier station 1, Inverter Station 2, DC rectifier station shares neutral bus rod 3 and Inverter Station shares neutral bus rod 4, DC rectifier station shares the bus rod that neutral bus rod is connection each DC rectifier station neutral line 5, Inverter Station shares the bus rod that neutral bus rod is a connection each Inverter Station earth electrode neutral line 6, DC rectifier station is shared neutral bus rod and Inverter Station and shares between neutral bus rod and connected by metallic return 7, and arrange the neutral bus rod ground connection at DC rectifier station.Each time DC rectifier station and Inverter Station utilize three wires to form DC side loop respectively, and wherein two is the polar curve 8 and 9 of positive and negative polarities, and another root is the earth electrode neutral line 5 or 6 of described low insulation.The each time DC rectifier station earth electrode neutral line jointly accesses converting plant and shares neutral bus rod, and each time DC inversion station earth electrode neutral line jointly accesses Inverter Station and share neutral bus rod.Connecting DC rectifier station, to share the metallic return that neutral bus rod and Inverter Station share neutral bus rod be general distribution network overhead wire.The converting plant of each time direct current and Inverter Station share place's earth electrode.
In the utility model high voltage direct current transmission ground electrode system, when certain time direct current one pole line failure, this time direct current automatically can transfer monopolar metallic return mode to and run; When a pole of certain current conversion station break down need to deactivate time, first automatically transfer monopolar metallic return mode to, then also can transfer one pole two-conductor line metallic return mode in parallel to and run.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and amendment to above-mentioned execution mode.Therefore, the utility model is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present utility model modifications and changes more of the present utility model.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (4)
1. a high voltage direct current transmission ground electrode system, comprise multiple-circuit line converting plant and Inverter Station, it is characterized in that, also comprise DC rectifier station and share neutral bus rod and Inverter Station shares neutral bus rod, described DC rectifier station shares the bus rod that neutral bus rod is connection each DC rectifier station earth electrode neutral line, described Inverter Station shares the bus rod that neutral bus rod is a connection each Inverter Station earth electrode neutral line, described DC rectifier station shares neutral bus rod and described Inverter Station shares between neutral bus rod by a metallic return connection, and arrange the neutral bus rod ground connection of DC rectifier station or Inverter Station.
2. high voltage direct current transmission ground electrode system according to claim 1, it is characterized in that, each time DC rectifier station and Inverter Station utilize three wires to form DC side loop respectively, and wherein two is the polar curve of positive and negative polarities, and another root is the earth electrode neutral line of low insulation.
3. high voltage direct current transmission ground electrode system according to claim 1, is characterized in that, it is general distribution network overhead wire that described connection DC rectifier station shares the metallic return that neutral bus rod and Inverter Station share neutral bus rod.
4. high voltage direct current transmission ground electrode system according to claim 1, is characterized in that, each time DC rectifier station and Inverter Station share place's earth electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520469897.2U CN204720999U (en) | 2015-07-01 | 2015-07-01 | A kind of high voltage direct current transmission ground electrode system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520469897.2U CN204720999U (en) | 2015-07-01 | 2015-07-01 | A kind of high voltage direct current transmission ground electrode system |
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| CN204720999U true CN204720999U (en) | 2015-10-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762825A (en) * | 2016-04-06 | 2016-07-13 | 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 | DC grounding electrode system and interconnection method |
| CN111740394A (en) * | 2020-05-12 | 2020-10-02 | 南方电网科学研究院有限责任公司 | Method and device for inhibiting ground current of common grounding electrode |
| CN113489043A (en) * | 2021-07-12 | 2021-10-08 | 南方电网科学研究院有限责任公司 | Parallel multi-terminal direct current system |
-
2015
- 2015-07-01 CN CN201520469897.2U patent/CN204720999U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762825A (en) * | 2016-04-06 | 2016-07-13 | 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 | DC grounding electrode system and interconnection method |
| CN105762825B (en) * | 2016-04-06 | 2018-06-05 | 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 | A kind of DC earthing electrode systems and the method for interconnection |
| CN111740394A (en) * | 2020-05-12 | 2020-10-02 | 南方电网科学研究院有限责任公司 | Method and device for inhibiting ground current of common grounding electrode |
| CN111740394B (en) * | 2020-05-12 | 2021-11-26 | 南方电网科学研究院有限责任公司 | Method and device for inhibiting ground current of common grounding electrode |
| CN113489043A (en) * | 2021-07-12 | 2021-10-08 | 南方电网科学研究院有限责任公司 | Parallel multi-terminal direct current system |
| WO2023284216A1 (en) * | 2021-07-12 | 2023-01-19 | 南方电网科学研究院有限责任公司 | Parallel multi-end direct current system |
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