CN102664379B - Equivalent 24 pulse wave non-control rectification DC thawing apparatus - Google Patents
Equivalent 24 pulse wave non-control rectification DC thawing apparatus Download PDFInfo
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- CN102664379B CN102664379B CN201210179425.4A CN201210179425A CN102664379B CN 102664379 B CN102664379 B CN 102664379B CN 201210179425 A CN201210179425 A CN 201210179425A CN 102664379 B CN102664379 B CN 102664379B
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- 238000010257 thawing Methods 0.000 title abstract 3
- 230000005540 biological transmission Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000009466 transformation Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses an equivalent 24 pulse wave non-control rectification DC thawing apparatus which is composed of a 12 pulse wave rectifier transformer (1), a first three-phase bridge non-control rectifier (2), a second three-phase bridge non-control rectifier (3), a variable-tap parallel reactor (4) and a frequency multiplier circuit (5) which are connected in series, wherein the 12 pulse wave rectifier transformer (1) is provided with a three-phase output end connected with the input end of the first three-phase bridge non-control rectifier (2), and the three-phase output end is connected with the input end of the second three-phase bridge non-control rectifier (3). Two output ends of the variable-tap parallel reactor (4) are correspondingly connected with two input ends of the frequency multiplier circuit (5). The apparatus has the advantages of simple structure, wide thawing applicability, low investment, small occupation area, high cost performance, low pollution on the power grid, and smooth waveform, and is easy to operate and simple to maintain, thereby saving both human resources and material resources.
Description
Technical field
The invention belongs to electrical engineering technical field, relate in particular to a kind of equivalent 24 pulse waves and do not control rectification DC de-icing device.
Background technology
The icing phenomenon in winter of transmission line is one of electric power system major natural disasters.The provinces such as Guizhou, Hunan, Hubei, Jiangxi are located in Central-South innerland, and its distinctive topographic structure and weather environmental quality cause the outburst of large area ice damage frequent.The for example continuous low temperature at the beginning of 2008 weather that congeals causes the transmission line large area icing of southern area, and the therefore broken string of falling tower of many basic routing lines, causes large-area power outage, brings significant impact to national economy.After ice damages in 2008, for resisting the ice damage of transmission line, power department R&D institution of China has in succession developed DC de-icing device transmission line has been carried out to ice-melt, to ensure the safe and stable operation of electrical network.
Current DC de-icing device common are six pulse wave rectifiers and 12 pulsating wave rectifier system, be divided into again controlled and uncontrollable two kinds of control modes, in actual moving process, inevitably bring harmonic current to disturb, increase noise and the power consumption of ice-melt power transformer, affected the quality of power supply of electrical network.Along with DC de-icing device is protected electric outstanding contributions in the universal and anti-ice of the heavy ice-covering area of transmission line, how to develop that DC waveform is level and smooth, the less and economical and practical DC de-icing device of harmonic current is a problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention is: larger for existing six pulse waves and 12 pulsating wave DC de-icing device AC harmonic current, increase the defect of distribution transformer noise and loss, provide a kind of novel equivalent 24 pulse waves not control rectification DC de-icing device, to meet in transmission line deicing processes, the harmonic current that reduces ice-melt power transformer disturbs, and this device is made every effort to small investment, operation and maintenance are simple.
Technical solution of the present invention is, referring to Fig. 1, described equivalent 24 pulse waves are not controlled rectification DC de-icing device as shown in Figure 1, by 12 pulsating wave rectifier transformer 1, the first three-phase bridge not control rectifier 2, the second three-phase bridge not control rectifier 3, become tap shunt reactor 4 and frequency multiplier circuit 5 and be composed in series.In one row six phase output terminals of wherein said 12 pulsating wave rectifier transformer 1, have three-phase output end to be connected to the not input of control rectifier 2 of described the first three-phase bridge, three-phase output end is connected to the not input of control rectifier 3 of described the second three-phase bridge in addition.Described the first three-phase bridge not output of control rectifier 2 has anodal A and negative pole B; Described the second three-phase bridge not output of control rectifier 3 has anodal C and negative pole D.Wherein said the first three-phase bridge not the anodal A of control rectifier 2 outputs and described the second three-phase bridge not the anodal C of control rectifier 3 outputs be connected to respectively the input of described change tap shunt reactor 4; Described the first three-phase bridge not the negative pole B of control rectifier 2 outputs and described the second three-phase bridge not the negative pole D of control rectifier 3 outputs do not control the negative pole parallel connection of the output of rectification DC de-icing device as these equivalent 24 pulse waves.Two output correspondences of described change tap shunt reactor 4 are connected to two inputs of described frequency multiplier circuit 5; The output of described frequency multiplier circuit 5 is not controlled the positive pole of the output of rectification DC de-icing device as these equivalent 24 pulse waves.
When of the present invention equivalent 24 pulse waves that form thus are not controlled the use of rectification DC de-icing device, for example 10kV alternating current inputs to 12 pulsating wave rectifier transformer 1 by the input of its 12 pulsating wave rectifier transformer 1 and carries out step-down; Above-mentioned 12 pulsating wave rectifier transformer 1 one side three-phase output ends export one group of low voltage three-phase voltage offer the first three-phase bridge not control rectifier 2 carry out rectification, this group low voltage three-phase voltage transformation is become to direct current; Above-mentioned 12 pulsating wave rectifier transformer 1 opposite side three-phase output end export another group low voltage three-phase voltage offer the second three-phase bridge not control rectifier 3 carry out rectification, also this group low voltage three-phase voltage transformation is become to direct current; The first three-phase bridge not the anodal A output level of control rectifier 2 as an input level that becomes tap shunt reactor 4, the second three-phase bridge not the anodal C output level of control rectifier 3 as becoming tap shunt reactor 4 another input level; The output voltage that becomes tap shunt reactor 4 offers frequency multiplier circuit 5; The output of frequency multiplier circuit 5 is connected to one end of transmission line as the positive pole of deicing device; The the first three-phase bridge not negative pole B of the output of control rectifier 2 and the second three-phase bridge negative pole that the negative pole D parallel connection of the output of control rectifier 3 is not controlled the output of rectification DC de-icing device as these equivalent 24 pulse waves is connected to the other end of transmission line, to implement the DC ice melting to this transmission line.
In said structure, the effect of described 12 pulsating wave rectifier transformer 1 is by after High Level AC Voltage step-down, provides the six-phase voltage of 30 ° of two groups of corresponding phase angle differences to give respectively not control rectifier 3 of control rectifier 2, the second three-phase bridge of the first three-phase bridge.And described the first three-phase bridge not control rectifier 2, the second three-phase bridge not the effect of control rectifier 3 be that alternating current is converted to direct current.The effect of described change tap shunt reactor 4 is to utilize magnetic balance to be related to that control rectifier 2 and the second three-phase bridge do not exchange pulsation on control rectifier 3 output dc voltages to dynamic equilibrium the first three-phase bridge.The effect of described frequency multiplier circuit 5 is that the alternating component on direct voltage is carried out to rectification again, and the pulse number of former direct voltage is doubled, and direct voltage is more level and smooth.
The invention has the beneficial effects as follows:
1), this apparatus structure is simple, only utilize 12 pulse wave rectifier transformers, change tap shunt reactor and a small amount of diode can realize the effect of 24 pulse wave rectifier circuit, implement the ice-melt to 220kV circuit in transformer station or other electric pressure circuits, applied widely;
2), without 24 pulse wave rectifier transformers, small investment, area occupied is little, cost performance is high;
3), three phase full bridge do not control rectification, processing ease, saves human and material resources, saves time;
4), adopt air-cooled design, do not control rectifier system, Operation and Maintenance is simple;
5), when operation, it is little that AC injects mains by harmonics, power factor is high, little to electric network pollution; DC side output dc voltage ripple factor is little, and waveform is level and smooth.
Brief description of the drawings
Fig. 1 is the structured flowchart of a specific embodiment of the present invention, in figure, is denoted as:
1-12 pulsating wave rectifier transformer,
Not control rectifier of the 2-the first three-phase bridge,
Not control rectifier of the 3-the second three-phase bridge,
4-change tap shunt reactor,
5-frequency multiplier circuit.
Embodiment
Referring to Fig. 1, Figure 1 shows that the present invention equivalence 24 pulse waves do not control specific embodiment of rectification DC de-icing device, the 12 pulsating wave rectifier transformer 1 of this embodiment, the ZSS-9100/10 type 9100kVA rectifier transformer that adopts electric branch company of Chinese Special power transformation work Hengyang transformer Co., Ltd to produce; The first three-phase bridge is control rectifier 2 and the second three-phase bridge not control rectifier of ZYAF-1400 type 4MW three-phase bridge that control rectifier 3 does not all adopt Hunan China province Hui Cui Power Tech Corp. Inc. to produce not; Become the KE-1400/36 type reactor that tap shunt reactor 4 adopts Hubei China province Yichang Cauer Electronics Co., Ltd. to produce; The ZYAF-2800 type full-wave rectifying circuit that frequency multiplier circuit 5 adopts Hunan China province Hui Cui Power Tech Corp. Inc. to produce.
Described 12 pulsating wave rectifier transformer 1, the first three-phase bridge be not control rectifier 3, change tap shunt reactor 4 and frequency multiplier circuit 5 of control rectifier 2, the second three-phase bridge not, by above-mentioned technical solution, is connected in series with reference to shown in Fig. 1.Wherein, the side three-phase output end in row six phase output terminals of 12 pulsating wave rectifier transformer 1 is connected to the not input of control rectifier 2 of the first three-phase bridge, and opposite side three-phase output end is connected to the not input of control rectifier 3 of the second three-phase bridge.The the first three-phase bridge not output of control rectifier 2 has anodal A and negative pole B; The the second three-phase bridge not output of control rectifier 3 has anodal C and negative pole D.The first three-phase bridge not the anodal A of control rectifier 2 outputs and the second three-phase bridge not the anodal C of control rectifier 3 outputs be connected to respectively the input that becomes tap shunt reactor 4; The first three-phase bridge not the negative pole B of control rectifier 2 outputs and the second three-phase bridge not the negative pole D parallel connection of control rectifier 3 outputs not control the negative pole of rectification DC de-icing device output as these equivalent 24 pulse waves.Become the corresponding connection of two inputs of two outputs with the frequency multiplier circuit 5 of tap shunt reactor 4; The output of this frequency multiplier circuit 5 becomes these equivalent 24 pulse waves does not control the positive pole of rectification DC de-icing device output.
Equivalence 24 pulse waves of the present embodiment of said structure are not controlled rectification DC de-icing device, are proved to be respond well through analogue test, and esy to use, safe and reliable, reach designing requirement completely.
Claims (1)
1. equivalence 24 pulse waves are not controlled rectification DC de-icing device, it is characterized in that, it is by 12 pulsating wave rectifier transformer (1), the first three-phase bridge is control rectifier (2) not, the second three-phase bridge is control rectifier (3) not, becoming tap shunt reactor (4) and frequency multiplier circuit (5) is composed in series, in one row six phase output terminals of wherein said 12 pulsating wave rectifier transformer (1), there is three-phase output end to be connected to the not input of control rectifier (2) of described the first three-phase bridge, three-phase output end is connected to the not input of control rectifier (3) of described the second three-phase bridge in addition, described the first three-phase bridge not output of control rectifier (2) has anodal A and negative pole B, described the second three-phase bridge not output of control rectifier (3) has anodal C and negative pole D, wherein said the first three-phase bridge not the anodal A of control rectifier (2) output and described the second three-phase bridge not the anodal C of control rectifier (3) output be connected to respectively the input of described change tap shunt reactor (4), described the first three-phase bridge is negative pole B and the not negative pole D parallel connection of control rectifier (3) output of described the second three-phase bridge of control rectifier (2) output not, and two output correspondences of described change tap shunt reactor (4) are connected to two inputs of described frequency multiplier circuit (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210179425.4A CN102664379B (en) | 2012-06-01 | 2012-06-01 | Equivalent 24 pulse wave non-control rectification DC thawing apparatus |
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| CN201210179425.4A CN102664379B (en) | 2012-06-01 | 2012-06-01 | Equivalent 24 pulse wave non-control rectification DC thawing apparatus |
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| CN102664379A CN102664379A (en) | 2012-09-12 |
| CN102664379B true CN102664379B (en) | 2014-10-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103345280A (en) * | 2013-07-18 | 2013-10-09 | 国家电网公司 | Internal temperature monitoring system of de-icing device |
| CN104836463B (en) * | 2015-04-30 | 2018-01-05 | 华南理工大学 | Mixing transformation system based on three-phase PWM rectification Yu multiple-unit uncontrollable rectifier |
| CN112952715B (en) * | 2021-03-29 | 2023-10-03 | 湖南防灾科技有限公司 | High-power low-harmonic direct-current ice melting device |
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| CN101316033A (en) * | 2008-06-11 | 2008-12-03 | 国网武汉高压研究院 | High-capacity direct current de-icing device |
| RU2376692C1 (en) * | 2008-06-09 | 2009-12-20 | Открытое акционерное общество "Научно-исследовательский институт по передаче электроэнергии постоянным током высокого напряжения" (ОАО "НИИПТ") | Combined plant for glase ice and reactive power compensation |
| CN101847856A (en) * | 2010-05-13 | 2010-09-29 | 湖南省电力公司试验研究院 | Power transmission line direct current ice melting device based on twelve pulse wave uncontrollable rectification |
| CN102340121A (en) * | 2011-09-20 | 2012-02-01 | 湖南省电力公司科学研究院 | Direct current deicing device for ultra high voltage transmission line |
| CN202633876U (en) * | 2012-06-01 | 2012-12-26 | 湖南省电力公司科学研究院 | Equivalent 24-pulse-wave uncontrolled rectifying direct-current ice melting device |
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2012
- 2012-06-01 CN CN201210179425.4A patent/CN102664379B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2376692C1 (en) * | 2008-06-09 | 2009-12-20 | Открытое акционерное общество "Научно-исследовательский институт по передаче электроэнергии постоянным током высокого напряжения" (ОАО "НИИПТ") | Combined plant for glase ice and reactive power compensation |
| CN101316033A (en) * | 2008-06-11 | 2008-12-03 | 国网武汉高压研究院 | High-capacity direct current de-icing device |
| CN101847856A (en) * | 2010-05-13 | 2010-09-29 | 湖南省电力公司试验研究院 | Power transmission line direct current ice melting device based on twelve pulse wave uncontrollable rectification |
| CN102340121A (en) * | 2011-09-20 | 2012-02-01 | 湖南省电力公司科学研究院 | Direct current deicing device for ultra high voltage transmission line |
| CN202633876U (en) * | 2012-06-01 | 2012-12-26 | 湖南省电力公司科学研究院 | Equivalent 24-pulse-wave uncontrolled rectifying direct-current ice melting device |
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Address after: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Patentee after: Electric Power Research Institute, State Grid Hunan Electric Power Company Patentee after: Hunan Xiangdian Electric Power Text & Research Co., Ltd. Patentee after: State Grid Corporation of China Address before: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Patentee before: Science Research Institute of Hunan Electric Power Co., Ltd. Patentee before: Hunan Xiangdian Electric Power Text & Research Co., Ltd. Patentee before: State Grid Corporation of China |
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