CN215733380U - Direct-current ice melting device - Google Patents
Direct-current ice melting device Download PDFInfo
- Publication number
- CN215733380U CN215733380U CN202121243836.6U CN202121243836U CN215733380U CN 215733380 U CN215733380 U CN 215733380U CN 202121243836 U CN202121243836 U CN 202121243836U CN 215733380 U CN215733380 U CN 215733380U
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- China
- Prior art keywords
- power
- ice melting
- group
- pole
- switch groups
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/25—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only arranged for operation in series, e.g. for multiplication of voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Rectifiers (AREA)
Abstract
The utility model relates to a direct-current ice melting device which comprises a CPU and six groups of switch groups, wherein the six groups of switch groups form a three-phase PWM rectification structure, the three-phase input end of the three-phase PWM rectification structure is respectively connected with three inductors in series and then is used for being connected with external 14kV three-phase power, the output end of the three-phase PWM rectification structure is used for being connected with an external transmission line, each group of switch groups is formed by connecting a plurality of power tubes in series in the same conduction direction, resistors R2 with the same resistance value are connected between an E pole and a C pole of each power tube in a bridging manner, the number of the power tubes in each group of switch groups is the same, and the CPU is respectively connected with a G pole of each power tube to implement control. Under the condition of a certain input voltage, the direct-current ice melting device can adjust and control different output voltages through software, and can meet the requirements of users on quick ice melting or slow speed adjustment.
Description
Technical Field
The utility model relates to a line ice melting technology, in particular to a direct-current ice melting device.
Background
For the ice melting of a direct current line, a fixed direct current ice melting scheme shown in fig. 1 is generally adopted at present, wherein 220kV is transformed to 35kV through a 500kV transformer, 35kV is transformed to 14kV through a rectifier transformer, and then is output to a transmission line through a rectifier device formed by connecting diodes in series.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a hardware structure of a direct-current ice melting device, which can adjust and control different output voltages through software under the condition of a certain input voltage after a software worker programs, and can meet the requirements of users on quick ice melting or slow speed adjustment.
Therefore, the direct-current ice melting device comprises a CPU and six groups of switch groups, wherein the six groups of switch groups form a three-phase PWM rectification structure, a three-phase input end of the three-phase PWM rectification structure is connected with three inductors in series respectively and then is used for being connected with external 14kV three-phase power, an output end of the three-phase PWM rectification structure is used for being connected with an external transmission line, each group of switch groups is formed by connecting a plurality of power tubes in series according to the same conduction direction, resistors R2 with the same resistance value are connected between an E pole and a C pole of each power tube in a bridging mode, the number of the power tubes in each group of switch groups is the same, and the CPU is connected with a G pole of each power tube respectively to control.
Further, the power tube is an IBGT tube with the rated power of 4500V.
Furthermore, each group of switch groups is formed by connecting 4 IBGT tubes in series in the same conduction direction.
Furthermore, a branch consisting of a resistor R1 connected in series with a capacitor C1 is connected between the E pole and the C pole of each IBGT tube in a bridging manner, the resistors R1 in the branches of each IBGT tube have the same resistance value, and the capacitors C1 in the branches of each IBGT tube have the same capacitance value.
Furthermore, each group of power tubes is provided with a controller for controlling the on-off of the power tubes in the group of switch groups, and the CPU controls the power tubes in the corresponding switch group through the controller.
The direct-current ice melting device forms a three-phase PWM rectification structure through six groups of switch groups, three inductors are respectively connected in series at the three-phase input end of the three-phase PWM rectification structure to provide electromotive force, each group of switch groups are connected in series through a plurality of power tubes for voltage sharing, and a resistor R2 is additionally arranged for static voltage sharing, so that the three-phase PWM rectification structure can be ensured to stably and reliably meet the working requirement of 14kV three-phase power input.
The above description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the description and other objects, features, and advantages of the present invention more comprehensible.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to refer to like elements throughout the drawings.
In the drawings:
FIG. 1 is a schematic diagram of a conventional fixed DC ice melting scheme;
fig. 2 is a circuit diagram of the dc de-icing apparatus of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 2, the core of the direct-current ice melting device of the utility model is six groups of switch groups, the six groups of switch groups form a three-phase PWM rectification structure, a three-phase input end of the three-phase PWM rectification structure is respectively connected in series with three inductors L1, L2, and L3 for docking external 14kV three-phase power, wherein the three inductors L1, L2, and L3 are used for providing electromotive force for the ice melting device and additionally burdening a filtering function, and an output end of the three-phase PWM rectification structure is used for docking an external transmission line.
In fig. 2, each group of switch groups is formed by connecting a plurality of power tubes in series in the same conduction direction, the multi-power tubes are utilized to carry out series voltage-sharing and equally-dividing 14kV three-phase power, so that the power tubes are prevented from being broken down, and in order to ensure the voltage-sharing effect, a resistor R2 is connected between an E pole and a C pole of each power tube in a bridging manner to carry out static voltage-sharing, wherein the resistance values of R2 are the same.
In order to realize the balance of the three-phase PWM rectification structure, the quantity of power tubes in each group of switch groups is controlled to be the same.
Preferably, the power tube is an IBGT tube with a rated power of 4500V, which has a high withstand voltage, and can ensure a stable circuit, when the IGBT is selected, considering that an input is 14KV, a switch group is formed by connecting 4 IBGT tubes in series in the same conduction direction, and then 4 × 4.5KV is greater than 18KV >14KV, so as to ensure that the circuit can operate, wherein redundant 4KV is redundancy, and the circuit has a surge resistance.
Furthermore, a branch consisting of a resistor R1 and a capacitor C1 connected in series is connected between the E pole and the C pole of each IBGT tube in a crossing manner, wherein the resistors R1 in the branches on each IBGT tube have the same resistance value, and the capacitors C1 in the branches on each IBGT tube have the same capacitance value, so that the voltage rising speed can be slowed down when the power tube is turned off, and the turn-off loss can be reduced.
In the utility model, in order to realize synchronous control of each group of switch groups and uniform on-off of each power tube in each group of switch groups, each group of switch tubes is provided with a controller U1-U6 for controlling the on-off of the switch tubes in the group of switch groups, and a Central Processing Unit (CPU) is used for respectively controlling each controller U1-U6 to implement uniform control.
When the ice melting device works, the CPU respectively carries out uniform on-off control on the switching tubes in each group of switch groups through each controller U1-U6, PWM rectification is carried out, different voltages are output by controlling the size of a conduction angle of the PWM rectification, and the purpose of rapidly melting ice or adjusting the slowing speed of a user is met.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. A direct-current ice melting device is characterized in that:
the three-phase PWM rectifier circuit comprises a CPU and six groups of switch groups, wherein the six groups of switch groups form a three-phase PWM rectifier structure, a three-phase input end of the three-phase PWM rectifier structure is respectively connected with three inductors in series and then is used for being connected with external 14kV three-phase power, an output end of the three-phase PWM rectifier structure is used for being connected with an external transmission line in series, each group of switch groups is formed by connecting a plurality of power tubes in series in the same conduction direction, resistors R2 with the same resistance value are connected between an E pole and a C pole of each power tube in a bridging mode, the number of the power tubes in each group of switch groups is the same, and the CPU is respectively connected with a G pole of each power tube to implement control.
2. The direct current ice melting apparatus according to claim 1, wherein: the power tube is an IBGT tube with the rated power of 4500V.
3. The direct current ice melting apparatus according to claim 2, wherein: each group of switch groups is formed by connecting 4 IBGT tubes in series according to the same conduction direction.
4. The direct current ice melting apparatus according to claim 2, wherein: a branch consisting of a resistor R1 and a capacitor C1 is connected between the E pole and the C pole of each IBGT tube in a bridging manner, the resistors R1 in the branches on each IBGT tube have the same resistance value, and the capacitors C1 in the branches on each IBGT tube have the same capacitance value.
5. The direct current ice melting apparatus according to claim 1, wherein: each group of power tubes is provided with a controller for controlling the on-off of the power tubes in the group of switch groups, and the CPU controls the power tubes in the corresponding switch group through the controller.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121243836.6U CN215733380U (en) | 2021-06-04 | 2021-06-04 | Direct-current ice melting device |
| PCT/CN2021/136109 WO2022252536A1 (en) | 2021-06-04 | 2021-12-07 | Direct current de-icing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121243836.6U CN215733380U (en) | 2021-06-04 | 2021-06-04 | Direct-current ice melting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215733380U true CN215733380U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121243836.6U Active CN215733380U (en) | 2021-06-04 | 2021-06-04 | Direct-current ice melting device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN215733380U (en) |
| WO (1) | WO2022252536A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201590771U (en) * | 2009-06-18 | 2010-09-22 | 江西省电力科学研究院 | Multipurpose large-power controllable power source |
| CN106684795A (en) * | 2015-11-10 | 2017-05-17 | 云南电网有限责任公司昭通供电局 | Direct current deicing apparatus based on three-phase bridge type full-control structure |
| CN108123413B (en) * | 2017-12-28 | 2020-11-06 | 国网湖南省电力有限公司 | Fine adjustable diode rectification type direct current ice melting device and method |
| CN208112512U (en) * | 2018-04-16 | 2018-11-16 | 江西锐天科创电气科技有限公司 | Transducer drive circuit |
| CN108988269B (en) * | 2018-08-22 | 2020-09-04 | 南京南瑞继保电气有限公司 | Voltage source type ice melting device, control method and control device |
-
2021
- 2021-06-04 CN CN202121243836.6U patent/CN215733380U/en active Active
- 2021-12-07 WO PCT/CN2021/136109 patent/WO2022252536A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| WO2022252536A1 (en) | 2022-12-08 |
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