CN105097254A - 24-pluse wave double-body rectifier transformer for deicing extra-high voltage circuit - Google Patents
24-pluse wave double-body rectifier transformer for deicing extra-high voltage circuit Download PDFInfo
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- CN105097254A CN105097254A CN201510592372.2A CN201510592372A CN105097254A CN 105097254 A CN105097254 A CN 105097254A CN 201510592372 A CN201510592372 A CN 201510592372A CN 105097254 A CN105097254 A CN 105097254A
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Abstract
The invention relates to a 24-pluse wave double-body rectifier transformer for deicing an extra-high voltage circuit. The rectifier transformer comprises a closed oil tank, a first body and a second body. The first body comprises a first iron beam, a first low-voltage winding, a first grounded screen, a first high-voltage winding and a first high-voltage regulating winding. The first low-voltage winding is composed of a plus 22.5-degree low-voltage phase-shift winding, a plus 22.5-degree low-voltage basic winding, a minus 22.5-degree low-voltage basic winding and a minus 22.5-degree low-voltage phase-shift winding. The second body comprises a second iron beam, a second low-voltage winding, a second grounded screen, a second high-voltage winding and a second high-voltage regulating winding. The second low-voltage winding is composed of a plus 7.5-degree low-voltage phase-shift winding, a plus 7.5-degree low-voltage basic winding, a minus 7.5-degree low-voltage basic winding and a minus 7.5-degree low-voltage phase-shift winding. The rectifier transformer of the invention is excellent in balance in terms of the output voltage and the short-circuit impedance, and solves the problem that the heat of the rectifier is not even, thereby improving operational reliability and prolonging service life of a DC-based deicing device of the extra-high voltage circuit.
Description
Technical field
The present invention relates to electrical engineering technical field, be specifically related to the two device body rectifier transformer of a kind of 24 pulse waves for extra high voltage line ice-melt.
Background technology
Extra-high voltage grid solves the inevitable choice that China's energy resources and load center are contrary distribution, and extra high voltage line fed distance is long, its corridor with a varied topography through area, meteorological condition is changeable, serious icing very easily occurs and occurs the accidents such as the broken string of falling tower.Extra high voltage line transmission capacity is large, supply district wide, and reliability requirement is very high, once there is the icing broken string of falling tower, easily causes bulk power grid off-the-line, causes large-area power-cuts, constitute a serious threat to national economy and people's productive life.Therefore, research and develop reliable extra high voltage line de-icing technology and there is very important realistic meaning.
Extra high voltage line, because of the restriction of power supply capacity, can only adopt DC ice melting mode.The power supply of extra high voltage line DC de-icing device is very high to harmonic requirement, for injecting the harmonic content of electrical network when reducing ice-melt, reducing floor space simultaneously, reducing cost, 24 pulse wave diode rectification modes need be adopted to carry out DC ice melting to extra high voltage line.Extra high voltage line ice melting current is large, need many group rectifier bridges in parallel, as output current is uneven, the accidents such as the heating of partial rectification bridge sharp increase, component damage will be caused, also can increase harmonic content with the size of unsymmetrical current, the conventional parameter such as 24 pulse wave rectifier transformer output voltage, short-circuit impedance difference is comparatively large, is difficult to the balance realizing each group of rectifier bridge output current in parallel, often be greater than 20%, cause the rectifier life-span greatly to shorten.Therefore, the harmonious good 24 pulse wave rectifier transformers of a kind of output parameter of research are badly in need of, to ensure the safe and reliable operation of extra high voltage line DC de-icing device.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiency that prior art exists, provide the harmony of a kind of output voltage and short impedance good, can guarantee rectifier heating evenly, greatly improve operational reliability and the two device body rectifier transformer of 24 pulse waves for extra high voltage line ice-melt in useful life of extra high voltage line DC de-icing device.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
The two device body rectifier transformer of a kind of 24 pulse waves for extra high voltage line ice-melt, comprise the closed tank that transformer oil is housed and the first device body be installed in described closed tank and the second device body, described first device body comprises the first core limb, on described first core limb, direction is radially provided with the first low pressure winding successively, first earth shield, first high pressure winding and the first high pressure tap-changing windings, described first low pressure winding is by+22.5 degree low pressure Phase shift winding arranged successively along the first core limb axis direction, the basic winding of+22.5 degree low pressure,-22.5 basic windings of degree low pressure and-22.5 degree low pressure Phase shift winding are formed, described second device body comprises the second core limb, on described second core limb, direction is radially provided with the second low pressure winding successively, second earth shield, second high pressure winding and the second high pressure tap-changing windings, described second low pressure winding is by+7.5 degree low pressure Phase shift winding arranged successively along the second core limb axis direction, the basic winding of+7.5 degree low pressure,-7.5 basic windings of degree low pressure and-7.5 degree low pressure Phase shift winding are formed.
The two device body rectifier transformer of 24 above-mentioned pulse waves, preferably, described first high pressure winding is by arrange successively along the first core limb axis direction and two parts high pressure winding of parallel connection is formed; Described second high pressure winding is by arrange successively along the second core limb axis direction and two parts high pressure winding of parallel connection is formed.
The two device body rectifier transformer of 24 above-mentioned pulse waves, preferably, described first core limb and the second core limb are three phase three limb core, are formed by high magnetic conduction grain oriented silicon steel sheet stack.
The two device body rectifier transformer of 24 above-mentioned pulse waves, preferably, the insulation distance of the supreme lower yoke of each winding is identical, and leakage field border is symmetrical.
The two device body rectifier transformer of 24 above-mentioned pulse waves, preferably, the pattern of each high pressure winding is continous way, and the pattern of the basic winding of each low pressure and low pressure Phase shift winding is continous way or spiral.
The two device body rectifier transformer of 24 above-mentioned pulse waves, preferably, the upper pour point of described transformer oil is-40 DEG C, and top-oil temperature ceiling value is 80K, and the temperature limit of each winding is 85K.
The two device body rectifier transformer of 24 above-mentioned pulse waves, preferably, the two device body rectifier transformer of described 24 pulse waves is equipped with capsule conservator and adopts the detachable gilled radiator of Natural Oil Circulation Power cooling air mode.
Compared with prior art, the invention has the advantages that:
1, phase shift exports 24 pulse waves, and ice-melt time-harmonic wave reduces greatly, and content is less than 1%;
2, adopt two machine body structure, the other phase shift+22.5 of each device status is spent ,-22.5 degree and+7.5 are spent ,-7.5 degree, effectively ensure that the harmony of output voltage and short-circuit impedance, output voltage difference is no more than 0.25%, and short-circuit impedance mutual deviation is less than 3%;
3, the current imbalance rate connect after can ensureing rectifier transformer between rectifier bridge in parallel is less than 5%, guarantees rectifier heating evenly, substantially increases operational reliability and the useful life of extra high voltage line DC de-icing device.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the present invention for the two device body rectifier transformer of 24 pulse waves of extra high voltage line ice-melt.
Marginal data:
1, closed tank; 2, the first core limb; 3, the second core limb; 4 ,+22.5 degree low pressure Phase shift winding; 5, the basic winding of+22.5 degree low pressure; 6, the basic winding of-22.5 degree low pressure; 7 ,-22.5 degree low pressure Phase shift winding; 8 ,+7.5 degree low pressure Phase shift winding; 9, the basic winding of+7.5 degree low pressure; 10, the basic winding of-7.5 degree low pressure; 11 ,-7.5 degree low pressure Phase shift winding; 12, the first earth shield; 13, the second earth shield; 14, the first high pressure winding; 15, the second high pressure winding; 16, the first high pressure tap-changing windings; 17, the second high pressure tap-changing windings.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the present invention is used for the two device body rectifier transformer of 24 pulse waves of extra high voltage line ice-melt, comprise the closed tank 1 that transformer oil is housed and the first device body be installed in closed tank 1 and the second device body, first device body comprises the first core limb 2, on first core limb 2, direction is radially provided with the first low pressure winding successively, first earth shield 12, first high pressure winding 14 and the first high pressure tap-changing windings 16, first low pressure winding is by+22.5 degree low pressure Phase shift winding 4 arranged successively along the first core limb 2 axis direction, the basic winding 5 of+22.5 degree low pressure,-22.5 degree low pressure basic winding 6 and-22.5 degree low pressure Phase shift winding 7 is formed, second device body comprises the second core limb 3, on second core limb 3, direction is radially provided with the second low pressure winding successively, second earth shield 13, second high pressure winding 15 and the second high pressure tap-changing windings 17, second low pressure winding is by+7.5 degree low pressure Phase shift winding 8 arranged successively along the second core limb 3 axis direction, the basic winding 9 of+7.5 degree low pressure,-7.5 degree low pressure basic winding 10 and-7.5 degree low pressure Phase shift winding 11 is formed.
In the present embodiment, the first high pressure winding 14 is by arrange successively along the first core limb 2 axis direction and two parts high pressure winding of parallel connection is formed; Second high pressure winding 15 is by arrange successively along the second core limb 3 axis direction and two parts high pressure winding of parallel connection is formed.First core limb 2 and the second core limb 3 are three phase three limb core, are formed by high magnetic conduction grain oriented silicon steel sheet stack.The pattern of each high pressure winding is continous way, and the pattern of the basic winding of each low pressure and low pressure Phase shift winding is continous way or spiral.
In the present embodiment, the insulation distance of the supreme lower yoke of each winding is identical, and leakage field border is symmetrical, ensure that the harmony of short-circuit impedance.
In the present embodiment, transformer oil is as cooling and dielectric, and its upper pour point is-40 DEG C, and top-oil temperature ceiling value is 80K, and the temperature limit of each winding is 85K.
In the present embodiment, the two device body rectifier transformer of 24 pulse waves is equipped with capsule conservator and detachable gilled radiator, and the type of cooling adopts Natural Oil Circulation Power Air flow.The hermetically-sealed construction of the two device body rectifier transformer of 24 pulse waves adopts totally-enclosed structure, and insulation grade anti-corrosion is A level.
In each device body, winding is made up of low pressure winding, high pressure winding, tap-changing windings.Winding concentric arrangement, be set on core limb, often hand down radial (from inside to outside) be followed successively by: core limb, low pressure winding, high pressure winding and tap-changing windings, its mesolow winding is divided into two groups of basic windings of low pressure and two groups of low pressure Phase shift winding, and four windings arrange vertically, take up room little, transformer loss is low, volume is little, lightweight, with the obvious advantage.Be provided with earth shield between high pressure winding and low pressure winding, prevent high-pressure side overvoltage to be delivered to low-pressure side, damage rectifier transformer rectifier below, effectively can suppress high order harmonic component simultaneously.
When the present invention is used for the two device body rectifier transformer work of 24 pulse waves of extra high voltage line ice-melt, first high pressure winding 14 and the second high pressure winding 15 parallel connection input 220kV three-phase voltage, by the access of the first high pressure tap-changing windings 16 and the second high pressure tap-changing windings 17 with disconnect the adjustment realizing transformer low voltage.Low-pressure side adopts lengthened triangular phase shift, the basic winding of+22.5 degree low pressure 5 and the basic winding 6 of-22.5 degree low pressure of the first device body pass through+22.5 degree low pressure Phase shift winding 4 ,-22.5 and spend low pressure Phase shift winding 7 phase shift+22.5 degree and-22.5 degree respectively, the basic winding of+7.5 degree low pressure 9 and the basic winding 10 of-7.5 degree low pressure of the second device body pass through+7.5 degree low pressure Phase shift winding 8 ,-7.5 and spend low pressure Phase shift winding 11 phase shift+7.5 degree and-7.5 degree respectively, make equivalent 24 pulse waves of two device body compositions, effectively ensure that the harmony of output voltage and short-circuit impedance simultaneously.The output voltage difference of the two device body rectifier transformer of this 24 pulse wave is no more than 0.25%, short-circuit impedance mutual deviation is less than 3%, effectively can ensure that injecting mains by harmonics content is less than 1%, output current unbalance factor is less than 5%, solve the problem that rectifier heating is uneven, substantially increase operational reliability and the useful life of extra high voltage line DC de-icing device.
The two device body rectifier transformer of above-mentioned 24 pulse waves proving effect after State Grid Corporation of China's power transmission and transforming equipment anti-icing mitigation technology key lab actual motion is good, reaches designing requirement completely.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is also not only confined to above-described embodiment.For those skilled in the art, do not departing from the improvement that obtains under the technology of the present invention concept thereof and conversion also should be considered as protection scope of the present invention.
Claims (7)
1. the two device body rectifier transformer of 24 pulse waves for extra high voltage line ice-melt, it is characterized in that: comprise the closed tank (1) that transformer oil is housed and the first device body be installed in described closed tank (1) and the second device body, described first device body comprises the first core limb (2), on described first core limb (2), direction is radially provided with the first low pressure winding successively, first earth shield (12), first high pressure winding (14) and the first high pressure tap-changing windings (16), described first low pressure winding is by+22.5 degree low pressure Phase shift winding (4) arranged successively along the first core limb (2) axis direction, + 22.5 degree basic winding of low pressure (5),-22.5 degree basic winding of low pressure (6) and-22.5 degree low pressure Phase shift winding (7) are formed, described second device body comprises the second core limb (3), on described second core limb (3), direction is radially provided with the second low pressure winding successively, second earth shield (13), second high pressure winding (15) and the second high pressure tap-changing windings (17), described second low pressure winding is by+7.5 degree low pressure Phase shift winding (8) arranged successively along the second core limb (3) axis direction, + 7.5 degree basic winding of low pressure (9),-7.5 degree basic winding of low pressure (10) and-7.5 degree low pressure Phase shift winding (11) are formed.
2. the two device body rectifier transformer of 24 pulse waves according to claim 1, is characterized in that: described first high pressure winding (14) is by arrange successively along the first core limb (2) axis direction and two parts high pressure winding of parallel connection is formed; Described second high pressure winding (15) is by arrange successively along the second core limb (3) axis direction and two parts high pressure winding of parallel connection is formed.
3. the two device body rectifier transformer of 24 pulse waves according to claim 1, is characterized in that: described first core limb (2) and the second core limb (3) are three phase three limb core, is formed by high magnetic conduction grain oriented silicon steel sheet stack.
4. the two device body rectifier transformer of 24 pulse waves according to claim 1, it is characterized in that: the insulation distance of the supreme lower yoke of each winding is identical, and leakage field border is symmetrical.
5. the two device body rectifier transformer of 24 pulse waves according to claim 1, it is characterized in that: the pattern of each high pressure winding is continous way, the pattern of the basic winding of each low pressure and low pressure Phase shift winding is continous way or spiral.
6. the two device body rectifier transformer of 24 pulse waves according to claim 1, is characterized in that: the upper pour point of described transformer oil is-40 DEG C, and top-oil temperature ceiling value is 80K, and the temperature limit of each winding is 85K.
7. the two device body rectifier transformer of 24 pulse waves according to claim 1, is characterized in that: the two device body rectifier transformer of described 24 pulse waves is equipped with capsule conservator and adopts the detachable gilled radiator of Natural Oil Circulation Power cooling air mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510592372.2A CN105097254B (en) | 2015-09-17 | 2015-09-17 | 24-pluse wave double-body rectifier transformer for deicing extra-high voltage circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841875A (en) * | 2017-03-01 | 2017-06-13 | 国家电网公司 | Three-Phase Distribution Transformers temperature rise test system and method based on alternating low frequency heating |
| CN108335886A (en) * | 2017-12-29 | 2018-07-27 | 金盘电气集团（上海）有限公司 | A kind of double transformer with split windings of change magnetic flux |
| CN109950033A (en) * | 2019-04-15 | 2019-06-28 | 特变电工沈阳变压器集团有限公司 | A kind of Vv of variable flux voltage variation (VFVV) connects tractive transformer |
| CN106841875B (en) * | 2017-03-01 | 2024-05-03 | 国家电网公司 | Three-phase distribution transformer temperature rise test system and method based on alternating-current low-frequency heating |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568766A (en) * | 2011-12-29 | 2012-07-11 | 保定天威集团(江苏)五洲变压器有限公司 | Conjugated rectifier transformer device |
| CN202513018U (en) * | 2011-12-02 | 2012-10-31 | 中电电气(江苏)股份有限公司 | Quaternary fission phase shift rectifier transformer |
| CN104779043A (en) * | 2015-04-14 | 2015-07-15 | 保定天威集团特变电气有限公司 | 220 kV de-icing rectifier transformer |
| CN205016363U (en) * | 2015-09-17 | 2016-02-03 | 国家电网公司 | A two ware body rectifier transformer of 24 pulse waves for special high voltage transmission lines ice -melt |
-
2015
- 2015-09-17 CN CN201510592372.2A patent/CN105097254B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202513018U (en) * | 2011-12-02 | 2012-10-31 | 中电电气(江苏)股份有限公司 | Quaternary fission phase shift rectifier transformer |
| CN102568766A (en) * | 2011-12-29 | 2012-07-11 | 保定天威集团(江苏)五洲变压器有限公司 | Conjugated rectifier transformer device |
| CN104779043A (en) * | 2015-04-14 | 2015-07-15 | 保定天威集团特变电气有限公司 | 220 kV de-icing rectifier transformer |
| CN205016363U (en) * | 2015-09-17 | 2016-02-03 | 国家电网公司 | A two ware body rectifier transformer of 24 pulse waves for special high voltage transmission lines ice -melt |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841875A (en) * | 2017-03-01 | 2017-06-13 | 国家电网公司 | Three-Phase Distribution Transformers temperature rise test system and method based on alternating low frequency heating |
| CN106841875B (en) * | 2017-03-01 | 2024-05-03 | 国家电网公司 | Three-phase distribution transformer temperature rise test system and method based on alternating-current low-frequency heating |
| CN108335886A (en) * | 2017-12-29 | 2018-07-27 | 金盘电气集团（上海）有限公司 | A kind of double transformer with split windings of change magnetic flux |
| CN109950033A (en) * | 2019-04-15 | 2019-06-28 | 特变电工沈阳变压器集团有限公司 | A kind of Vv of variable flux voltage variation (VFVV) connects tractive transformer |
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| CN105097254B (en) | 2017-05-24 |
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