WO2016086828A1 - Constant magnetic flux voltage regulating structure of ultrahigh voltage self-coupling power transformer - Google Patents
Constant magnetic flux voltage regulating structure of ultrahigh voltage self-coupling power transformer Download PDFInfo
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- WO2016086828A1 WO2016086828A1 PCT/CN2015/096086 CN2015096086W WO2016086828A1 WO 2016086828 A1 WO2016086828 A1 WO 2016086828A1 CN 2015096086 W CN2015096086 W CN 2015096086W WO 2016086828 A1 WO2016086828 A1 WO 2016086828A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
Definitions
- the invention relates to the technical field of autotransformers, in particular to a constant magnetic flux voltage regulating structure of an ultrahigh voltage autotransformer power transformer.
- the ultra-high voltage auto-transformation power transformer is often used for the communication transformer between two ultra-high voltage transmission systems. If the grid to which it is connected is an ultra-high voltage system, the series winding and the common winding of the autotransformer are both ultra-high voltage. grade.
- the common winding line end voltage regulation or neutral point voltage regulation is generally adopted, the common winding line end voltage regulation is a constant magnetic flux voltage regulation, and the neutral point voltage regulation is a variable magnetic flux.
- Pressure regulation in view of the neutral point voltage regulation method will bring the third winding voltage fluctuation and core over-excitation, so the constant flux line end voltage regulation is required in the power grid, then the insulation level of the tap changer mainly depends on the public The wire end insulation level of the winding. The higher the insulation level of the common winding end, the higher the difficulty and the price of the tap changer. If the insulation level on the common winding side exceeds the manufacturing level of the existing switch, the conventional line end voltage regulation structure can no longer be used.
- the present invention proposes a novel constant magnetic flux voltage regulating structure, which effectively reduces the insulation level of the ultrahigh voltage auto-transformer power transformer tap changer, and reduces the manufacturing difficulty and cost of the transformer tap changer.
- a constant magnetic flux voltage regulating structure of an ultra-high voltage auto-transformation power transformer comprising a main transformer body and a voltage regulating transformer body, the main transformer body comprises a series winding, a common winding and a third winding, and the voltage regulating transformer body comprises a sleeve
- the voltage regulating winding and the exciting winding on the same iron core the series winding is connected in series with the voltage regulating winding and then connected in series with the common winding, and the main transformer body is further provided with an excitation voltage regulating winding, the excitation voltage regulating winding and the series winding, the common winding sleeve
- the excitation voltage-regulating winding is connected in parallel with the excitation winding, and the excitation voltage-regulating winding is provided with a voltage-regulating switch.
- the polarity selection end of the voltage regulating switch is connected to the first end of the excitation winding, and the tapping end of the voltage regulating switch is connected to the end of the excitation winding.
- the gear position is controlled by the pressure regulating switch to control the number of turns of the excitation voltage winding in parallel with the excitation winding.
- the invention divides the main transformer and the voltage regulating transformer into two bodies, and designs a magnetron voltage regulating winding in the main transformer body, the winding is independent of the series winding and the common winding, but is matched with the series winding and the common winding.
- its main function is to introduce the potential into the voltage regulating winding in the transformer body according to the required voltage regulation ratio through the main column magnetic flux established by the series winding and the common winding potential.
- a certain point of the excitation voltage regulating winding is grounded, and the potential is locked to the ground potential.
- the gear position of the voltage regulating switch changes, the number of turns connected in parallel to the exciting winding changes, so that the potential of the exciting winding changes correspondingly, and the potential of the regulating winding is simultaneously
- the zigzag potential of the voltage regulating winding connected between the series winding and the common winding changes accordingly, thereby causing the working winding (the working winding refers to
- the excitation voltage regulating winding is directly connected to the switch, and the voltage regulating winding is actually indirectly connected through the excitation voltage regulating winding and the excitation winding. This approach reduces the level of insulation of the windings directly connected to the switch, thereby reducing the insulation level of the switch.
- one end of the excitation voltage regulating winding is grounded to reduce the voltage oscillation in the winding during the impact test.
- the autotransformer of the constant magnetic flux voltage regulating structure provided by the invention can realize the connection between two ultra-high voltage power grids, adopts the constant magnetic flux voltage regulation mode, does not cause the voltage fluctuation of the third winding and the overexcitation of the iron core;
- the insulation level of the voltage regulating winding is reduced, and the manufacturing difficulty and cost of the tap changer are reduced.
- Figure 1 is a schematic diagram of the wiring of the present invention
- LV third winding, MV, common winding, JTV, excitation voltage regulating winding, HV, series winding, TV, voltage regulating winding, JV, excitation winding, K, voltage regulating switch.
- the constant magnetic flux voltage regulating structure of the ultra-high voltage auto-transformation power transformer comprises a main transformer body and a voltage regulating transformer body, and the main transformer body comprises a series winding HV, a common winding MV, and a third winding LV.
- the excitation voltage regulating winding JTV the excitation voltage regulating winding JTV is independent of the series winding and the common winding MV, but is placed on the same core as the series winding HV and the common winding MV.
- the voltage regulating transformer body includes a voltage regulating winding TV and a field winding, and the voltage regulating winding TV and the exciting winding JV are sleeved on the same core.
- the series winding HV is connected in series with the voltage regulating winding TV and then connected in series with the common winding MV.
- the excitation voltage regulating winding JTV is connected in parallel with the exciting winding JV, the excitation voltage regulating winding JTV is connected with the voltage regulating switch K, and the polarity selection end of the voltage regulating switch K is
- the excitation winding JV is connected at the head end, and the tap-out terminal of the voltage-regulating switch K is connected to the end of the excitation winding JV, and the connection line is grounded in the middle.
- a The winding between the terminal and the X terminal serves as the primary winding and is connected to the power supply; Am terminal, X
- the common winding between the ends acts as a secondary winding, which is connected to the load.
- the third winding is located in the main transformer body, and is sleeved on the same core as the other windings. It is determined whether the load is connected according to the actual use of the transformer, so as to properly
- the voltage regulating winding when the voltage regulating winding is adjusted into position, the voltage of the series winding and the common winding is constant, and the potential induced in the excitation voltage regulating winding is also a constant value, and the excitation voltage regulating winding is connected with the voltage regulating switch, when the voltage regulating switch is in the gear
- the bit changes the number of turns connected in parallel to the exciting winding changes, so that the potential of the exciting winding changes accordingly, and the potential of the regulating winding changes at the same time according to the turns ratio, since the regulating winding is connected in series between the series winding and the common winding, the string
Abstract
A constant magnetic flux voltage regulating structure of ultrahigh voltage self-coupling power transformer, comprising a main transformer body and a voltage regulating transformer body, the main transformer body comprising a series winding (HV), a common winding (MV), an excitation voltage regulating winding (JTV) and a third winding (LV) sleeved on the same iron core, the voltage regulating transformer body comprising a voltage regulating winding (TV) and an excitation winding (JV) sleeved on the same iron core; the series winding is in serial connection with the voltage regulating winding, and is subsequently in serial connection with the common winding; the excitation voltage regulating winding is in parallel connection with the excitation winding; the excitation voltage regulating winding is provided with a voltage regulating switch (K). The self-coupling transformer can connect two ultrahigh power grids, and by utilizing a constant magnetic flux voltage regulating method does not cause a third winding voltage fluctuation and iron over-excitation, reduces the level of insulation of a voltage regulating winding, and reduces cost and difficulty in manufacturing a voltage regulating switch.
Description
技术领域 Technical field
本发明涉及自耦变压器技术领域，尤其涉及一种超高压自耦电力变压器的恒磁通调压结构。 The invention relates to the technical field of autotransformers, in particular to a constant magnetic flux voltage regulating structure of an ultrahigh voltage autotransformer power transformer.
背景技术 Background technique
超高压自耦电力变压器常用于两个超高压输电系统之间的联络变压器，若当其所联接的电网均为超高压系统时，则该自耦变压器的串联绕组、公共绕组均为超高压电压等级。
The ultra-high voltage auto-transformation power transformer is often used for the communication transformer between two ultra-high voltage transmission systems. If the grid to which it is connected is an ultra-high voltage system, the series winding and the common winding of the autotransformer are both ultra-high voltage. grade.
如果超高压自耦电力变压器采用调压结构时，一般采用公共绕组线端调压或中性点调压，公共绕组线端调压为恒磁通调压，中性点调压为变磁通调压；鉴于中性点调压方式会带来第三绕组电压波动和铁心过励磁，因此在电网中较多要求采用恒磁通线端调压，那么分接开关的绝缘水平主要取决于公共绕组的线端绝缘水平。公共绕组线端绝缘水平越高，则分接开关制造难度与价格越高，如果公共绕组侧的绝缘水平超过了现有开关的制造水平，则不再能采用传统的线端调压结构。
If the UHV autotransformation power transformer adopts a voltage regulating structure, the common winding line end voltage regulation or neutral point voltage regulation is generally adopted, the common winding line end voltage regulation is a constant magnetic flux voltage regulation, and the neutral point voltage regulation is a variable magnetic flux. Pressure regulation; in view of the neutral point voltage regulation method will bring the third winding voltage fluctuation and core over-excitation, so the constant flux line end voltage regulation is required in the power grid, then the insulation level of the tap changer mainly depends on the public The wire end insulation level of the winding. The higher the insulation level of the common winding end, the higher the difficulty and the price of the tap changer. If the insulation level on the common winding side exceeds the manufacturing level of the existing switch, the conventional line end voltage regulation structure can no longer be used.
发明内容 Summary of the invention
为了解决上述问题，本发明提出了一种新型的恒磁通调压结构，有效的降低了超高压自耦电力变压器分接开关的绝缘水平，降低了变压器分接开关制造难度与造价。
In order to solve the above problems, the present invention proposes a novel constant magnetic flux voltage regulating structure, which effectively reduces the insulation level of the ultrahigh voltage auto-transformer power transformer tap changer, and reduces the manufacturing difficulty and cost of the transformer tap changer.
为实现上述目的，本发明采用的技术方案为： In order to achieve the above object, the technical solution adopted by the present invention is:
一种超高压自耦电力变压器的恒磁通调压结构，包括主变压器器身和调压变压器器身，主变压器器身包括串联绕组、公共绕组和第三绕组，调压变压器器身包括套在同一铁芯上的调压绕组和激磁绕组，串联绕组与调压绕组串联后又与公共绕组串联，主变压器器身还设有一激磁调压绕组，激磁调压绕组与串联绕组、公共绕组套在同一铁芯上，激磁调压绕组与激磁绕组并联，激磁调压绕组设有调压开关。
A constant magnetic flux voltage regulating structure of an ultra-high voltage auto-transformation power transformer, comprising a main transformer body and a voltage regulating transformer body, the main transformer body comprises a series winding, a common winding and a third winding, and the voltage regulating transformer body comprises a sleeve The voltage regulating winding and the exciting winding on the same iron core, the series winding is connected in series with the voltage regulating winding and then connected in series with the common winding, and the main transformer body is further provided with an excitation voltage regulating winding, the excitation voltage regulating winding and the series winding, the common winding sleeve On the same core, the excitation voltage-regulating winding is connected in parallel with the excitation winding, and the excitation voltage-regulating winding is provided with a voltage-regulating switch.
进一步，调压开关的极性选择端与激磁绕组首端连接，调压开关的分接引出端与激磁绕组的末端连接。通过调压开关切换档位，控制激磁调压绕组中与激磁绕组并联的线圈匝数。
Further, the polarity selection end of the voltage regulating switch is connected to the first end of the excitation winding, and the tapping end of the voltage regulating switch is connected to the end of the excitation winding. The gear position is controlled by the pressure regulating switch to control the number of turns of the excitation voltage winding in parallel with the excitation winding.
本发明将主变压器和调压变压器分置于两个器身，主变器身中设计一激磁调压绕组，该绕组独立于串联绕组与公共绕组之外，但与串联绕组、公共绕组均套装于同一铁芯上，其主要作用是通过串联绕组与公共绕组电势所建立的主柱磁通，按照需要的调压比例将电势引入调变器身中的调压绕组。激磁调压绕组的某一点接地，使之电位锁定为地电位，当调压开关的档位变化时，并联于激磁绕组的匝数变化，从而激磁绕组的电势相应变化，调压绕组的电势同时按照匝数比进行相应变化，由于调压绕组串联于串联绕组和公共绕组之间，串入串联绕组与公共绕组间的调压绕组匝电势随之变化，进而导致工作绕组（工作绕组指的是传输改变电压、传输电能的绕组的统称；高压电压=串联绕组电压+公共绕组电压+调压绕组电压）电压变化，最终实现调节电压的功能。
The invention divides the main transformer and the voltage regulating transformer into two bodies, and designs a magnetron voltage regulating winding in the main transformer body, the winding is independent of the series winding and the common winding, but is matched with the series winding and the common winding. On the same core, its main function is to introduce the potential into the voltage regulating winding in the transformer body according to the required voltage regulation ratio through the main column magnetic flux established by the series winding and the common winding potential. A certain point of the excitation voltage regulating winding is grounded, and the potential is locked to the ground potential. When the gear position of the voltage regulating switch changes, the number of turns connected in parallel to the exciting winding changes, so that the potential of the exciting winding changes correspondingly, and the potential of the regulating winding is simultaneously Corresponding change according to the turns ratio, since the voltage regulating winding is connected in series between the series winding and the common winding, the zigzag potential of the voltage regulating winding connected between the series winding and the common winding changes accordingly, thereby causing the working winding (the working winding refers to The transmission is a general term for the winding that changes the voltage and transmits the electric energy; the high voltage voltage = the series winding voltage + the common winding voltage + the voltage of the regulating winding) changes the voltage, and finally realizes the function of adjusting the voltage.
由于调压绕组不再直接接入有载调压开关，激磁调压绕组直接接入开关，调压绕组实际是通过激磁调压绕组和激磁绕组间接接入开关。这种方式降低了直接与开关相连绕组的绝缘水平，从而使得开关的绝缘水平降低。
Since the voltage regulating winding is no longer directly connected to the on-load voltage regulating switch, the excitation voltage regulating winding is directly connected to the switch, and the voltage regulating winding is actually indirectly connected through the excitation voltage regulating winding and the excitation winding. This approach reduces the level of insulation of the windings directly connected to the switch, thereby reducing the insulation level of the switch.
进一步，激磁调压绕组一端接地，以便减小冲击试验时绕组内的电压震荡。 Further, one end of the excitation voltage regulating winding is grounded to reduce the voltage oscillation in the winding during the impact test.
本发明提供的恒磁通调压结构的自耦变压器，可实现两个超高压电网之间的连接，采用恒磁通调压方式，不会引起第三绕组电压波动和铁芯过励磁；同时降低了调压绕组的绝缘水平，降低了分接开关的制造难度和成本。
The autotransformer of the constant magnetic flux voltage regulating structure provided by the invention can realize the connection between two ultra-high voltage power grids, adopts the constant magnetic flux voltage regulation mode, does not cause the voltage fluctuation of the third winding and the overexcitation of the iron core; The insulation level of the voltage regulating winding is reduced, and the manufacturing difficulty and cost of the tap changer are reduced.
附图说明 DRAWINGS
图1是本发明的接线原理图； Figure 1 is a schematic diagram of the wiring of the present invention;
图中，LV、第三绕组，MV、公共绕组，JTV、激磁调压绕组，HV、串联绕组，TV、调压绕组，JV、激磁绕组，K、调压开关。
In the figure, LV, third winding, MV, common winding, JTV, excitation voltage regulating winding, HV, series winding, TV, voltage regulating winding, JV, excitation winding, K, voltage regulating switch.
具体实施方式 detailed description
一种超高压自耦电力变压器的恒磁通调压结构，如图所示，包括主变压器器身和调压变压器器身，主变压器器身包括串联绕组HV、公共绕组MV、第三绕组LV和激磁调压绕组JTV，激磁调压绕组JTV独立于串联绕组和公共绕组MV之外，但与串联绕组HV、公共绕组MV套在同一铁芯上。调压变压器器身包括调压绕组TV和激磁绕组，调压绕组TV和激磁绕组JV套在同一铁芯上。串联绕组HV与调压绕组TV串联后又与公共绕组MV串联，激磁调压绕组JTV与激磁绕组JV并联，激磁调压绕组JTV与调压开关K连接，调压开关K的极性选择端与激磁绕组JV首端连接，调压开关K的分接引出端与激磁绕组JV的末端连接，连接线路中间接地。A
端、X 端之间的绕组作为一次绕组，接电源；Am 端、X
端之间的公共绕组作为二次绕组，接负载。第三绕组位于主变压器器身中，与其他绕组套在同一铁芯上，根据变压器实际使用情况决定是否连接负载，以便适当提供电压。
The constant magnetic flux voltage regulating structure of the ultra-high voltage auto-transformation power transformer, as shown in the figure, comprises a main transformer body and a voltage regulating transformer body, and the main transformer body comprises a series winding HV, a common winding MV, and a third winding LV. And the excitation voltage regulating winding JTV, the excitation voltage regulating winding JTV is independent of the series winding and the common winding MV, but is placed on the same core as the series winding HV and the common winding MV. The voltage regulating transformer body includes a voltage regulating winding TV and a field winding, and the voltage regulating winding TV and the exciting winding JV are sleeved on the same core. The series winding HV is connected in series with the voltage regulating winding TV and then connected in series with the common winding MV. The excitation voltage regulating winding JTV is connected in parallel with the exciting winding JV, the excitation voltage regulating winding JTV is connected with the voltage regulating switch K, and the polarity selection end of the voltage regulating switch K is The excitation winding JV is connected at the head end, and the tap-out terminal of the voltage-regulating switch K is connected to the end of the excitation winding JV, and the connection line is grounded in the middle. A
The winding between the terminal and the X terminal serves as the primary winding and is connected to the power supply; Am terminal, X
The common winding between the ends acts as a secondary winding, which is connected to the load. The third winding is located in the main transformer body, and is sleeved on the same core as the other windings. It is determined whether the load is connected according to the actual use of the transformer, so as to properly supply the voltage.
使用时，当调压绕组调节到位后，串联绕组与公共绕组的电压是恒定的，激磁调压绕组中感应的电势也是恒定值，激磁调压绕组与调压开关相连，当调压开关的档位变化时，并联于激磁绕组的匝数变化，从而激磁绕组的电势相应变化，调压绕组的电势同时按照匝数比进行相应变化，由于调压绕组串联于串联绕组和公共绕组之间，串入串联绕组与公共绕组间的调压绕组匝电势随之变化，进而导致工作绕组（工作绕组指的是传输改变电压、传输电能的绕组的统称；高压电压=串联绕组电压+公共绕组电压+调压绕组电压）电压变化，最终实现调节电压的功能。
In use, when the voltage regulating winding is adjusted into position, the voltage of the series winding and the common winding is constant, and the potential induced in the excitation voltage regulating winding is also a constant value, and the excitation voltage regulating winding is connected with the voltage regulating switch, when the voltage regulating switch is in the gear When the bit changes, the number of turns connected in parallel to the exciting winding changes, so that the potential of the exciting winding changes accordingly, and the potential of the regulating winding changes at the same time according to the turns ratio, since the regulating winding is connected in series between the series winding and the common winding, the string The potential of the regulating winding between the series winding and the common winding changes accordingly, which leads to the working winding (the working winding refers to the winding of the winding that changes the voltage and transmits the electric energy; the high voltage = the winding voltage of the series + the voltage of the common winding + The voltage of the winding winding voltage changes, and finally realizes the function of adjusting the voltage.
Claims (3)
1. 一
种超高压自耦电力变压器的恒磁通调压结构，包括主变压器器身和调压变压器器身，主变压器器身包括串联绕组（HV）、公共绕组（MV）和第三绕组（LV），调压变压器器身包括套在同一铁芯上的调压绕组（TV）和激磁绕组（JV），串联绕组（HV）与调压绕组（TV）串联后又与公共绕组（MV）串联，其特征在于：主变压器器身还设有一激磁调压绕组（JTV），激磁调压绕组（JTV）与串联绕组（HV）、公共绕组（MV）套在同一铁芯上，激磁调压绕组（JTV）与激磁绕组（JV）并联，激磁调压绕组（JTV）设有调压开关（K）。 1 a
The constant magnetic flux voltage regulating structure of the ultra-high voltage auto-transformation power transformer comprises a main transformer body and a voltage regulating transformer body, and the main transformer body comprises a series winding (HV), a common winding (MV) and a third winding (LV). The voltage regulating transformer body comprises a voltage regulating winding (TV) and a field winding (JV) which are sleeved on the same core, and the series winding (HV) is connected in series with the voltage regulating winding (TV) and then connected in series with the common winding (MV). The utility model is characterized in that: the main transformer body is further provided with a excitation voltage regulating winding (JTV), the excitation voltage regulating winding (JTV) is connected with the series winding (HV) and the common winding (MV) on the same iron core, and the excitation voltage regulating winding ( JTV) is connected in parallel with the excitation winding (JV), and the excitation voltage regulating winding (JTV) is provided with a voltage regulating switch (K).
2.
根据权利要求1所述的超高压自耦电力变压器的恒磁通调压结构，其特征在于：调压开关（K）的极性选择端与激磁绕组（JV）首端连接，调压开关（K）的分接引出端与激磁绕组（JV）的末端连接。 2.
The constant magnetic flux voltage regulating structure of the ultrahigh voltage auto-transformation power transformer according to claim 1, wherein the polarity selection end of the voltage regulating switch (K) is connected to the first end of the excitation winding (JV), and the voltage regulating switch ( The tap terminal of K) is connected to the end of the excitation winding (JV).
3. 根据权利要求1或2所述的超高压自耦电力变压器的恒磁通调压结构，其特征在于：激磁调压绕组（JTV）一端接地。
3. The constant magnetic flux voltage regulating structure of the ultrahigh voltage auto-transformation power transformer according to claim 1 or 2, wherein one end of the excitation voltage regulating winding (JTV) is grounded.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410715679.2 | 2014-12-02 | ||
| CN201410715679.2A CN104361984B (en) | 2014-12-02 | 2014-12-02 | The constant flux voltage regulation structure of supertension self coupling power transformer |
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| Publication Number | Publication Date |
|---|---|
| WO2016086828A1 true WO2016086828A1 (en) | 2016-06-09 |
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| PCT/CN2015/096086 WO2016086828A1 (en) | 2014-12-02 | 2015-12-01 | Constant magnetic flux voltage regulating structure of ultrahigh voltage self-coupling power transformer |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104361984B (en) |
| WO (1) | WO2016086828A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799285A (en) * | 2017-11-18 | 2018-03-13 | 国家电网公司 | A kind of remote-operated 10kv Intelligent distribution transformers and its method of work |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104361984B (en) * | 2014-12-02 | 2016-08-24 | 山东电力设备有限公司 | The constant flux voltage regulation structure of supertension self coupling power transformer |
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| JPS593844B2 (en) * | 1979-07-30 | 1984-01-26 | 株式会社日立製作所 | single phase transformer |
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| JP2688067B2 (en) * | 1988-07-11 | 1997-12-08 | 新日本製鐵株式会社 | Tensile strength for electron beam welding 60 ▲ kg ▼ f / ▲ mm2 ▼ class Mo-added steel manufacturing method |
| CN101256891B (en) * | 2007-12-28 | 2010-06-02 | 保定天威集团有限公司 | Extra-high voltage single-phase autotransformer |
| CN101651030A (en) * | 2009-08-07 | 2010-02-17 | 中国西电电气股份有限公司 | Autotransformer with low-voltage compensation |
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| CN1601668A (en) * | 2004-10-26 | 2005-03-30 | 特变电工沈阳变压器集团有限公司 | Super-large volume loading voltage regulation autotransformer |
| CN101697312A (en) * | 2009-11-03 | 2010-04-21 | 保定天威集团有限公司 | Low-voltage dual-voltage on-load-tap-changing auto-transformer |
| CN202034213U (en) * | 2010-12-30 | 2011-11-09 | 保定天威集团有限公司 | Auto-coupling and induction on-load voltage-regulating transformer |
| CN203085329U (en) * | 2013-03-04 | 2013-07-24 | :特变电工沈阳变压器集团有限公司 | On-load voltage regulating autotransformer with double apparatus bodies |
| CN104361984A (en) * | 2014-12-02 | 2015-02-18 | 山东电力设备有限公司 | Constant-magnetic-flux voltage regulating structure for ultrahigh-voltage self coupling electric transformer |
| CN204189592U (en) * | 2014-12-02 | 2015-03-04 | 山东电力设备有限公司 | The constant flux voltage regulation structure of superhigh pressure self coupling power transformer |
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| CN107799285A (en) * | 2017-11-18 | 2018-03-13 | 国家电网公司 | A kind of remote-operated 10kv Intelligent distribution transformers and its method of work |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104361984A (en) | 2015-02-18 |
| CN104361984B (en) | 2016-08-24 |
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