CN202268666U - Compact sharing earth electrode arrangement structure - Google Patents
Compact sharing earth electrode arrangement structure Download PDFInfo
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- CN202268666U CN202268666U CN 201120343020 CN201120343020U CN202268666U CN 202268666 U CN202268666 U CN 202268666U CN 201120343020 CN201120343020 CN 201120343020 CN 201120343020 U CN201120343020 U CN 201120343020U CN 202268666 U CN202268666 U CN 202268666U
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Abstract
A compact sharing earth electrode arrangement structure comprises a framework (1), a fence (2), an earth electrode circuit (3), a reactor (4), a capacitor (5) and a transition bus frame (6). An outgoing cable of the capacitor (5) penetrates through the framework (1) to be connected with a current earth point (8) on the transition bus frame (6), an outgoing cable of the current earth point (8) is connected with average-current resistors (9), and a plurality of the average-current resistors (9) are in series connection. The compact sharing earth electrode arrangement structure adopts the series-connection average-current resistors in an inner ring branch so as to force outer ring current to flow towards an inner ring, changes natural distribution ratio of earth current of the inner ring and an outer ring, reduces the earth current of the outer ring to the maximum limit so as to lower maximum step voltage of an earth electrode, achieves safe and stable operation of a multi-circuit direct current system in a relatively small polar ring arrangement space, saves occupied space, and reduces project investment.
Description
Technical field
The utility model relates to a kind of compact shared grounding utmost point arrangement.
Background technology
At present, domestic direct current system all is earth electrodes that a current conversion station is equipped with a conventional design.The direct current transportation earth electrode floor space of this conventional design is big, generally needs about 1 square kilometre level land.Therefore, in order to seek a suitable utmost point location, the addressing demonstration is very arduous in the engineering, even have to seek something far and wide when it is within reach (make earth electrode circuit long), and is costly.
Along with China's power industry is fast-developing; High voltage direct current transmission is becoming China's electric power and is carrying pith; Particularly along with transferring electricity from the west to the east and on national network moving forward steadily, China's direct current transportation just develops towards high voltage, jumbo direction, and the design rated current of earth electrode also progressively improves; Design earth electrode according to the traditional conventional mode, it is difficult further that addressing work becomes.On the one hand; China's load focuses mostly in the developed regions, east; Electric power system unusual complicated (at first will consider to reduce influence during the earth electrode addressing) to electric power system, earth electrode will be more and more far away from the distance of current conversion station (transformer station) or other large-scale underground metallic facility; On the other hand, the western mountainous areas in that power supply is concentrated receives the restriction of geographical conditions, seeks area and just compares difficulty in the level land itself of big (being suitable for burying underground earth electrode).These difficulties will seriously have influence on China's DC transmission engineering and implement and Development Trend.
For solving the difficult problem of earth electrode addressing, electricity market is called and is stepped up to take technical measures, reduces the earth electrode floor space.To this consideration, " many current conversion stations shared grounding utmost point " designing technique has been proposed.
The shared grounding utmost point makes full use of place, utmost point location, thereby reaches the purpose that reduces floor space.Theoretical analysis result shows, adopts the shared grounding utmost point can reduce floor space significantly, and its effect depends on utmost point location model structure.For general mountain area earth electrode, can reduce floor space by more conventional earth electrode.This shows that owing to reduced floor space, make more place possess the condition of building earth electrode, therefore, utmost point location selects difficult problem to be resolved basically, earth-current is also had ready conditions to the problem that influences of environment and is improved.In addition, because its size is littler than conventional earth electrode, all can save at aspects such as floor space, electrode size, materials used, line lengths, its economic benefit and social benefit are very tangible.
But when two times (or many times) direct current system current conversion stations adopt the operation of the shared grounding utmost point; Because earth current very big (be single time system 2 times or many times); When adopting conventional two annulus to arrange; Need very big polar ring to arrange that size could satisfy the requirement of maximum step voltage controlling value, this arrangement has greatly increased the difficulty of choosing suitable utmost point location owing to need bigger floor space.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned existing disadvantages of background technology part, and a kind of compact shared grounding utmost point arrangement is provided.Ring branch road series connection flows resistance forced ring in the outer shroud current direction in it was employed in; Change the ratio that the inner and outer ring earth current distributes naturally; Reduce the outer shroud earth current to greatest extent and reduce the maximum step voltage of earth electrode; In less relatively polar ring arrangement space, realize many times direct current system safe and stable operations, practice thrift and take up an area of, reduce construction investment.
The purpose of the utility model reaches through following measure: compact shared grounding utmost point arrangement, and it comprises framework, enclosure wall; The earth electrode circuit, reactor, capacitor; Transition bus-bar frame, the outgoing cable of capacitor pass framework goes into the place with the electric current on the transition bus-bar frame and is connected, and it is characterized in that described electric current goes into the outgoing cable in place and be connected with flows resistance; Described flows resistance has a plurality of, and a plurality of flows resistances are connected in series.
In technique scheme, described flows resistance is divided into two spacers through cable trough, and the flows resistance of same number is arranged in two spacer.
The compact shared grounding of the utility model connects arrangement and has following characteristics: 1. the shared grounding utmost point adopts conventional two annulus (or many annulus) to arrange; 2. according to counting ring respective branch series connection flows resistance, force ring in the outer shroud current direction, the inner and outer ring electric current is distributed reach in a basic balance, reduce the maximum step voltage of earth electrode; 3. confirm the rated current and the power of flows resistance, the development flows resistance (at present this equipment development and through type approval test).
Because outer shroud had been born about 70% earth current when conventional two annulus was arranged; Can in earth electrode, encircle branch road place series connection flows resistance forces in the outer shroud current direction and encircles; Change the ratio that the inner and outer ring earth current distributes naturally, reduce the outer shroud earth current to greatest extent and reduce earth electrode maximum step voltage, many times direct current system safe and stable operations of realization in less relatively polar ring arrangement space; Not only practice thrift occupation of land, reduce the addressing difficulty, also reduce construction investment.
The utility model can be realized many times the direct current system safe and stable operation in less relatively polar ring arrangement space, practice thrift to take up an area of, and reduces construction investment.
Description of drawings
Fig. 1 is the structural representation vertical view of the utility model.
Fig. 2 is the structural representation end view of the utility model.
1. frameworks among the figure, 2. enclosure wall, 3. earth electrode circuit, 4. reactor, 5. capacitor, 6. transition bus-bar frame, 7. cable trough, 8. electric current is gone into the place, 9. flows resistance.
Embodiment
Below in conjunction with the performance of accompanying drawing detailed description the utility model, but they do not constitute the qualification to the utility model, only do for example.Advantage through explanation the utility model will become clear more and understanding easily simultaneously.
Consulting accompanying drawing can know: the utility model compact shared grounding utmost point arrangement, and it comprises framework 1, enclosure wall 2; Earth electrode circuit 3, reactor 4, capacitor 5; Transition bus-bar frame 6, the outgoing cable of capacitor 5 pass framework 1 goes into place 8 with the electric current on the transition bus-bar frame 6 and is connected, and it is characterized in that described electric current goes into the outgoing cable in place 8 and be connected with flows resistance 9; Described flows resistance 9 has a plurality of, and a plurality of flows resistances 9 are connected in series.Described flows resistance 9 is divided into two spacers through cable trough 7, and the flows resistance 9 (like Fig. 1, shown in Figure 2) of same number is arranged in two spacer.
The utility model installs flows resistance additional in interior ring respective branch and calculates according to shared grounding utmost point earth current, regulates resistance value and makes inner and outer ring distribute electric current in a basic balance, and the polar ring that obtains under the optimized maximum step voltage value is arranged; And the flows resistance device of between the earth current point of respective branch and earth electrode inlet wire, connecting.
The utility model compact shared grounding utmost point arrangement can be realized the many times shared operations of direct current system in limited utmost point location arrangement space, social, economic impacts is obvious, holds out broad prospects.
Other is prior art without the part that specifies in the utility model.
Claims (2)
1. compact shared grounding utmost point arrangement, it comprises framework (1), enclosure wall (2); Earth electrode circuit (3), reactor (4), capacitor (5); Transition bus-bar frame (6), the outgoing cable of capacitor (5) pass framework (1) goes into place (8) with the electric current on the transition bus-bar frame (6) and is connected, and it is characterized in that described electric current goes into the outgoing cable and flows resistance (9) in place (8)) be connected; Described flows resistance (9) has a plurality of, and a plurality of flows resistances (9) are connected in series.
2. compact shared grounding utmost point arrangement according to claim 1 is characterized in that described flows resistance (9) is divided into two spacers through cable trough (7), and the flows resistance (9) of same number is arranged in two spacer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120343020 CN202268666U (en) | 2011-09-14 | 2011-09-14 | Compact sharing earth electrode arrangement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120343020 CN202268666U (en) | 2011-09-14 | 2011-09-14 | Compact sharing earth electrode arrangement structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202268666U true CN202268666U (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120343020 Expired - Fee Related CN202268666U (en) | 2011-09-14 | 2011-09-14 | Compact sharing earth electrode arrangement structure |
Country Status (1)
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| CN (1) | CN202268666U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050907A (en) * | 2012-12-11 | 2013-04-17 | 湖北省电力公司检修分公司 | Security maintenance method for common grounding electrode of direct current power transmission systems |
| CN104753062A (en) * | 2015-04-09 | 2015-07-01 | 国家电网公司 | City distribution network multiple direct-current inverter common grounding electrode design method |
| CN105528493A (en) * | 2015-12-29 | 2016-04-27 | 中国电力科学研究院 | Configuring method of current equalizing resistor for direct current grounding electrode |
| CN107766684A (en) * | 2017-11-29 | 2018-03-06 | 中国能源建设集团广东省电力设计研究院有限公司 | DC earthing polar ring choosing method and system |
-
2011
- 2011-09-14 CN CN 201120343020 patent/CN202268666U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050907A (en) * | 2012-12-11 | 2013-04-17 | 湖北省电力公司检修分公司 | Security maintenance method for common grounding electrode of direct current power transmission systems |
| CN104753062A (en) * | 2015-04-09 | 2015-07-01 | 国家电网公司 | City distribution network multiple direct-current inverter common grounding electrode design method |
| CN105528493A (en) * | 2015-12-29 | 2016-04-27 | 中国电力科学研究院 | Configuring method of current equalizing resistor for direct current grounding electrode |
| CN107766684A (en) * | 2017-11-29 | 2018-03-06 | 中国能源建设集团广东省电力设计研究院有限公司 | DC earthing polar ring choosing method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CENTRAL SOUTHERN CHINA ELECTRIC POWER DESIGN INSTI Free format text: FORMER NAME: CENTRAL SOUTHERN CHINA ELECTRIC POWER DESIGN INSTITUTE, CHINA POWER ENGINEERING CONSULTING GROUP COR |
|
| CP03 | Change of name, title or address |
Address after: 430071 Wuchang District, Hubei, South Central Road No. two, No. 12, No. Patentee after: Co., Ltd of Central Southern China Electric Power Design Institute, China Power Engineering Consulting Group Corporation Patentee after: CHINA POWER ENGINEERING CONSULTING (GROUP) CORPORATION Patentee after: China Power Engineering Consulting Group Southwest Electric Power Design Institute Co., Ltd. Patentee after: Co., Ltd of Huabei Power Design Inst., China Power Engineering Consulting Group Patentee after: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. OF CHINA POWER ENGINEERING CONSULTING GROUP Address before: 430071 No. 668, democracy Road, Wuchang District, Hubei, Wuhan Patentee before: Central Southern China Electric Power Design Institute, China Power Engineering Consulting Group Cor Patentee before: China Power Engineering Consulting Group Corporation Patentee before: Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation Patentee before: Huabei Power Design Inst., China Power Engineering Consulting Group Patentee before: Northwest Electric Power Design Institute, China Power Engineering Consulting Group Corporation |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20170914 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |