CN103337824A - Segmentation direct-current deicing system of extreme high voltage direct-current transmission line - Google Patents
Segmentation direct-current deicing system of extreme high voltage direct-current transmission line Download PDFInfo
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- CN103337824A CN103337824A CN2013103031755A CN201310303175A CN103337824A CN 103337824 A CN103337824 A CN 103337824A CN 2013103031755 A CN2013103031755 A CN 2013103031755A CN 201310303175 A CN201310303175 A CN 201310303175A CN 103337824 A CN103337824 A CN 103337824A
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Abstract
The invention discloses a segmentation direct-current deicing system of an extreme high voltage direct-current transmission line. The system comprises a 220 kV deicing power supply (1), a 220 kV deicing line (2), a segmentation direct-current deicing station (3) and the extreme high voltage direct-current transmission line (4), wherein an output end of the 220 kV deicing power supply (1) is connected with the 220 kV deicing line (2); the other end of the 220 kV deicing line (2) is connected with an input end of an alternating current power supply interval (7) of the segmentation direct-current deicing station (3); and the segmentation direct-current deicing station (3) is connected with the extreme high voltage direct-current transmission line (4) through an extreme high voltage deicing knife-switch (5). The system has the advantages as follows: 1), the deicing requirement of a heavy icing area of the extreme high voltage direct-current transmission line can be met, and tower falling and line breaking are prevented; 2), the designed ice thickness can be reduced, so that the investment is reduced, and safe operation is guaranteed; and 3), the operation is simple, manual wiring is not required, the security coefficient is large, and the efficiency is high.
Description
Technical field
The invention belongs to the electrical engineering technical field, relate to a kind of extra high voltage direct current transmission line segmentation DC ice melting system.
Background technology
The extra high voltage direct current transmission line distance, institute is with a varied topography through the area, and meteorological condition is changeable, causes powerline ice-covering easily.And DC power transmission line has the advantages that transmission capacity is big, fed distance is long, coverage is wide, and its security and stability highlights outstanding.
Extra high voltage direct current transmission line improves transmission line design ice covering thickness as only adopting anti-ice measure, and a transmission line investment needs increase expense over ten billion, and is costly.Therefore, for reducing project cost, must consider to take the ice-melt measure.What propose at present passes through to adjust the de-icing method that the operational mode of DC transmission system own increases electric current, under the situation lower in ambient temperature, that wind speed is bigger, direct current system is because the restriction of its valve group design rated current, often be difficult to reach ice melting current and carry out all fronts ice-melt, there is certain limitation, is difficult to guarantee fully the safe and reliable operation of DC power transmission line.And adopt DC de-icing device when carrying out DC ice melting completely, and need the ice-melt power supply that very large capacity is provided, and apparatus cost is very high, can't satisfy the ice-melt demand.
Summary of the invention
The technical problem to be solved in the present invention is: the defective that can't carry out ice-melt completely at DC de-icing device to extra high voltage direct current transmission line, a kind of extra high voltage direct current transmission line segmentation DC ice melting system is provided, use this system below the heavy icing area transmission line, to build segmentation DC ice melting station, can reduce the work transmission line cost greatly, and ensure the safe and stable operation of extra high voltage direct current transmission line.
Technical scheme of the present invention is that referring to accompanying drawing 1, the above-mentioned extra high voltage direct current transmission line segmentation DC ice melting system that provides as shown in Figure 1, includes 220kV ice-melt power supply 1,220kV DC ice-melting 2, segmentation DC ice melting station 3 and extra-high voltage direct-current circuit 4.Wherein said segmentation DC ice melting station 3 is made up of ultra high voltage ice-melt disconnecting link 5, extra-high voltage direct-current line sectionalizing DC de-icing device 6, AC power interval 7, ice-melt bus 8.The AC power at described segmentation DC ice melting station 37 output at interval is connected with the end of incoming cables of described ice-melt bus 8, and the leading-out terminal of this ice-melt bus 8 is connected with the input of extra-high voltage direct-current line sectionalizing DC de-icing device 6 again.And the output termination ultra high voltage ice-melt disconnecting link 5 of the extra-high voltage direct-current line sectionalizing DC de-icing device 6 at described segmentation DC ice melting station 3, and be connected with above-mentioned extra-high voltage direct-current circuit 4 by this ultra high voltage ice-melt disconnecting link 5.The positive pole of described ultra high voltage ice-melt disconnecting link 5 connects the positive pole of described extra-high voltage direct-current circuit 4, and the negative pole of described ultra high voltage ice-melt disconnecting link 5 connects the negative pole of described extra-high voltage direct-current circuit 4.The output termination 220kV DC ice-melting 2 of above-mentioned 220kV ice-melt power supply 1, the other end of this 220kV DC ice-melting 2 is connected with the input at the AC power interval 7 at described segmentation DC ice melting station 3.
When the extra high voltage direct current transmission line segmentation DC ice melting of the present invention system that constitutes thus used, above-mentioned 220kV ice-melt power supply 1 provided AC power for segmentation DC ice melting station 3 by 220kV DC ice-melting 2.AC power is 7 incoming powers as ice-melt bus 8 at interval, AC power opening and turn-offing on the control ice-melt bus 8, extra-high voltage direct-current line sectionalizing DC de-icing device 6 is connected on the ice-melt bus 8, and the AC power that ice-melt bus 8 is provided is converted to DC power supply.Ultra high voltage ice-melt disconnecting link 5 is exported positive pole and the negative pole that is connected to extra-high voltage direct-current circuit 4 with the both positive and negative polarity of extra-high voltage direct-current line sectionalizing DC de-icing device 6, the DC ice melting power supply is provided for extra-high voltage direct-current circuit 4, and controls its keying.The place arranges one group of ultra high voltage short circuit disconnecting link respectively at the forward and backward 80-120 kilometer of distance segmentation DC ice melting station access point, is used for positive pole and negative pole short circuit with extra-high voltage direct-current circuit 4.One side of two groups of ultra high voltage short circuit disconnecting links inserts positive pole and the negative pole of extra-high voltage direct-current circuit 4 respectively, opposite side short circuit, thereby the ice-melt loop of formation extra-high voltage direct-current circuit 4.
The invention has the beneficial effects as follows:
1), can satisfy the ice-melt demand in the heavy icing of extra-high voltage direct-current circuit district, prevent the broken string of falling the tower of DC power transmission line;
2), can reduce the design ice thickness of extra-high voltage direct-current circuit, thereby reduce the investment of transmission line construction greatly, and guarantee safe operation and the power supply reliability thereof of transmission line;
3), adopt electronic control, simple to operate, need not artificial wiring, coefficient of safety is big, the efficient height.
Description of drawings
Fig. 1 is the structured flowchart of a specific embodiment of extra high voltage direct current transmission line segmentation DC ice melting system of the present invention, is denoted as among the figure:
1-220kV ice-melt power supply,
2-220kV DC ice-melting,
3-segmentation DC ice melting station,
4-extra-high voltage direct-current circuit,
5-ultra high voltage ice-melt disconnecting link,
6-extra-high voltage direct-current line sectionalizing DC de-icing device,
7-AC power interval,
8-ice-melt bus.
Embodiment
Referring to specific embodiment of extra high voltage direct current transmission line segmentation DC ice melting system of the present invention shown in Figure 1, the 2*LGJ-300 shaped steel core aluminum stranded wire that the 220kV DC ice-melting 2 of this embodiment adopts Chinese Wuxi Jiangnan Cable Co., Ltd to produce; The 6*LGJ-900 shaped steel core aluminum stranded wire that extra-high voltage direct-current circuit 4 adopts Chinese Wuxi Jiangnan Cable Co., Ltd to produce; GW7F-1100 (W)/J12000-63 type 1100kV, 12000A isolating switch that the ultra high voltage ice-melt disconnecting link 5 at segmentation DC ice melting station 3 adopts Chinese Shandong Taikai Disconnecting Switch Co., Ltd. to produce; Extra-high voltage direct-current line sectionalizing DC de-icing device 6 adopts the electricity examination of Hunan China province Hunan to grind the HCZRB-220/168 type 168MW DC de-icing device that technology Co., Ltd produces; AC power is the 7 3AP1FI type circuit breakers that adopt Siemens (Hangzhou) high-voltage switch gear Co., Ltd to produce at interval; The LDRE-Φ 70/64 type almag pipe bus that ice-melt bus 8 adopts Chinese Hubei Xinghe Power New Materials Co., Ltd to produce.Described segmentation DC ice melting station 3 required power supply capacitys are bigger, and the AC power of 220kV electric pressure need be provided.Near 3 500kV transformer station or 220kV transformer stations obtain so 220kV ice-melt power supply 1 is from segmentation DC ice melting station.Said modules 220kV ice-melt power supply 1,220kV DC ice-melting 2, extra-high voltage direct-current circuit 4 and the segmentation DC ice melting station of being made up of ultra high voltage ice-melt disconnecting link 5, extra-high voltage direct-current line sectionalizing DC de-icing device 6, AC power interval 7, ice-melt bus 83 are according to technique scheme and with reference to connection shown in Figure 1.The output that is the AC power interval 7 at segmentation DC ice melting station 3 is connected with the end of incoming cables of ice-melt bus 8, and the leading-out terminal of ice-melt bus 8 is connected with the input of extra-high voltage direct-current line sectionalizing DC de-icing device 6.The output termination ultra high voltage ice-melt disconnecting link 5 of the extra-high voltage direct-current line sectionalizing DC de-icing device 6 at segmentation DC ice melting station 3, and be connected with extra-high voltage direct-current circuit 4 by this ultra high voltage ice-melt disconnecting link 5.The positive pole of ultra high voltage ice-melt disconnecting link 5 connects the positive pole of extra-high voltage direct-current circuit 4, and the negative pole of ultra high voltage ice-melt disconnecting link 5 connects the negative pole of extra-high voltage direct-current circuit 4.The output termination 220kV DC ice-melting 2 of above-mentioned 220kV ice-melt power supply 1, the other end of this 220kV DC ice-melting 2 is connected with the input at the AC power interval 7 at segmentation DC ice melting station 3.
The extra-high voltage direct-current line sectionalizing DC ice melting system of said structure, respond well through evidence, the AC power that the big capacity 220kV ice-melt power supply 1 that near from segmentation DC ice melting station 3 500kV transformer station or 220kV transformer station obtain is transported to segmentation DC ice melting station 3 by 220kV DC ice-melting 2 at interval 7 imports the ice-melt bus 8 at segmentation DC ice melting station 3 at interval through this again.Extra-high voltage direct-current line sectionalizing DC de-icing device 6 is converted into direct current with interchange after ice-melt bus 8 obtains the 220kV AC power, through ultra high voltage ice-melt disconnecting link 5 this direct current is transported to and carries out ice-melt on the extra-high voltage direct-current circuit 4.Simple to operate, safe and reliable, reach designing requirement fully.
Claims (1)
1. extra high voltage direct current transmission line segmentation DC ice melting system, it is characterized in that, it includes 220kV ice-melt power supply (1), 220kV DC ice-melting (2), segmentation DC ice melting station (3) and extra-high voltage direct-current circuit (4), wherein said segmentation DC ice melting station (3) is by ultra high voltage ice-melt disconnecting link (5), extra-high voltage direct-current line sectionalizing DC de-icing device (6), AC power is (7) at interval, ice-melt bus (8) is formed, the AC power at described segmentation DC ice melting station (3) output of (7) at interval is connected with the end of incoming cables of described ice-melt bus (8), the leading-out terminal of this ice-melt bus (8) is connected with the input of extra-high voltage direct-current line sectionalizing DC de-icing device (6) again, and the output termination ultra high voltage ice-melt disconnecting link (5) of the extra-high voltage direct-current line sectionalizing DC de-icing device (6) at described segmentation DC ice melting station (3), and be connected with above-mentioned extra-high voltage direct-current circuit (4) by this ultra high voltage ice-melt disconnecting link (5), the positive pole of described ultra high voltage ice-melt disconnecting link (5) connects the positive pole of described extra-high voltage direct-current circuit (4), the negative pole of described ultra high voltage ice-melt disconnecting link (5) connects the negative pole of described extra-high voltage direct-current circuit (4), the output termination 220kV DC ice-melting (2) of above-mentioned 220kV ice-melt power supply (1), the other end of this 220kV DC ice-melting (2) is connected with the input at the AC power interval (7) at described segmentation DC ice melting station (3).
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| CN2013103031755A CN103337824A (en) | 2013-07-18 | 2013-07-18 | Segmentation direct-current deicing system of extreme high voltage direct-current transmission line |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394734A (en) * | 2017-08-30 | 2017-11-24 | 国网湖南省电力公司 | The exchange de-icing method of 35kV distribution network lines |
| CN109033691A (en) * | 2018-08-16 | 2018-12-18 | 四川大学 | Heating transmission pressure parameter optimization method certainly based on exchange heating power supply |
| CN112102984A (en) * | 2020-09-02 | 2020-12-18 | 永州电力勘测设计院有限公司 | Novel steel core ice melting insulated wire and ice melting system and method thereof |
| CN112271681A (en) * | 2020-10-27 | 2021-01-26 | 中国电力工程顾问集团中南电力设计院有限公司 | Leading structure of direct-current ground wire ice melting power supply of extra-high voltage multi-terminal direct-current converter station |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820140A (en) * | 2010-03-30 | 2010-09-01 | 南方电网技术研究中心 | Method for accessing DC ice melting device at substation |
| CN203339626U (en) * | 2013-07-18 | 2013-12-11 | 国家电网公司 | Segmented DC ice melting system of ultra-high voltage DC transmission line |
-
2013
- 2013-07-18 CN CN2013103031755A patent/CN103337824A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820140A (en) * | 2010-03-30 | 2010-09-01 | 南方电网技术研究中心 | Method for accessing DC ice melting device at substation |
| CN203339626U (en) * | 2013-07-18 | 2013-12-11 | 国家电网公司 | Segmented DC ice melting system of ultra-high voltage DC transmission line |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394734A (en) * | 2017-08-30 | 2017-11-24 | 国网湖南省电力公司 | The exchange de-icing method of 35kV distribution network lines |
| CN109033691A (en) * | 2018-08-16 | 2018-12-18 | 四川大学 | Heating transmission pressure parameter optimization method certainly based on exchange heating power supply |
| CN109033691B (en) * | 2018-08-16 | 2022-12-30 | 四川大学 | Self-heating power transmission line parameter optimization method based on alternating current heating power supply |
| CN112102984A (en) * | 2020-09-02 | 2020-12-18 | 永州电力勘测设计院有限公司 | Novel steel core ice melting insulated wire and ice melting system and method thereof |
| CN112271681A (en) * | 2020-10-27 | 2021-01-26 | 中国电力工程顾问集团中南电力设计院有限公司 | Leading structure of direct-current ground wire ice melting power supply of extra-high voltage multi-terminal direct-current converter station |
| CN112271681B (en) * | 2020-10-27 | 2022-03-29 | 中国电力工程顾问集团中南电力设计院有限公司 | Leading structure of direct-current ground wire ice melting power supply of extra-high voltage multi-terminal direct-current converter station |
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Application publication date: 20131002 |