CN113488347A - Power electronic switch group of direct current breaker - Google Patents
Power electronic switch group of direct current breaker Download PDFInfo
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- CN113488347A CN113488347A CN202110873766.0A CN202110873766A CN113488347A CN 113488347 A CN113488347 A CN 113488347A CN 202110873766 A CN202110873766 A CN 202110873766A CN 113488347 A CN113488347 A CN 113488347A
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- diode
- unit
- igbt
- module
- electronic switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/0271—Bases, casings, or covers structurally combining a switch and an electronic component
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
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Abstract
The invention discloses a power electronic switch group of a direct current breaker. The power electronic switch group comprises an IGBT module, a diode module, a voltage limiting unit, a buffer unit, a controller unit and a support frame, wherein the IGBT module is positioned in the center of the power electronic switch group, the diode module and the IGBT module are arranged side by side, the voltage limiting unit and the buffer unit are arranged on the outer side of the diode module, the controller unit is positioned on one side of the IGBT module, and the IGBT module, the diode module, the voltage limiting unit and the buffer unit are all fixed on the support frame. The invention designs the components in the electronic circuit switch group of the direct current breaker in a modularized way, and arranges the components in a reasonable connection way, thereby realizing the miniaturization of the electronic circuit switch group, improving the strength and enhancing the expansibility of the electronic circuit switch group.
Description
Technical Field
The invention belongs to the technical field of circuit breaker equipment, and particularly relates to a power electronic switch group of a direct current circuit breaker.
Background
With the rapid development of power systems, the gradual rise of distributed power generation and the wide application of direct current transmission, a direct current circuit breaker becomes a common switching device in the power systems. The power electronic switch is an important component of the coupling negative-voltage direct-current circuit breaker, and can be formed by connecting a plurality of small power electronic switches in series according to different requirements of rated voltage.
On the premise of maintaining strength and expansibility, optimizing the internal structure of the power electronic switch group and reducing the volume of the power electronic switch group become difficult problems faced by research and development personnel.
Disclosure of Invention
In order to solve the technical problem, the invention provides a power electronic switch group of a direct current breaker, which comprises an IGBT module, a diode module, a voltage limiting unit, a buffer unit, a controller unit and a support frame, wherein the IGBT module comprises a plurality of switching elements, the voltage limiting unit comprises a plurality of switching elements, and the control unit comprises:
the IGBT module is positioned in the center of the power electronic switch group;
the diode module and the IGBT module are arranged side by side;
the voltage limiting unit and the buffer unit are arranged on the outer side of the diode module;
the controller unit is positioned at one side of the IGBT module;
the IGBT module, the diode module, the voltage limiting unit and the buffer unit are all fixed on the support frame.
Preferably, one power electronic switch group comprises one IGBT module and two diode modules, the IGBT module is adjacent to the diode modules, and the diode modules are symmetrically arranged on two sides of the IGBT module;
the buffer unit and the diode module are arranged side by side;
the voltage limiting unit and the diode module are arranged side by side.
Preferably, the voltage limiting unit is adjacent to the diode module, and the voltage limiting unit, the diode module and the IGBT module are arranged side by side;
the buffer unit is adjacent to the diode module.
Preferably, one IGBT module includes at least two IGBT units, each of which is composed of one IGBT and two heat sinks disposed on upper and lower surfaces thereof;
IGBT units in the same IGBT module are stacked and arranged, and an insulating block is arranged between every two adjacent IGBT units.
Preferably, one of the diode modules includes at least one diode unit, each diode unit is formed by stacking four diodes and five heat sinks at intervals, and forms a bridge rectifier structure, the ac port is an input port, and the dc port is an output port;
if the number of the diode units in the same diode module is larger than or equal to 2, the diode units in the same diode module are stacked and arranged, and an insulating block is arranged between every two adjacent diode units.
Preferably, one of said voltage limiting units is constituted by at least one lightning arrester;
and if the number of the lightning arresters is more than or equal to 2, the lightning arresters are connected in parallel.
Preferably, one of the buffer units is composed of at least one capacitor and a nonlinear resistor, and the capacitor and the nonlinear resistor are connected in series.
Preferably, one controller unit consists of a controller and a bracket, one end of the bracket is connected with the controller, and the other end of the bracket is connected with the IGBT module.
Preferably, the voltage limiting unit and the buffer unit are both connected in parallel with the input port of the diode unit;
the output port of the diode unit is connected in series with the IGBT unit in the IGBT module.
Preferably, in one power electronic switch group, the total number of the IGBT units, the total number of the diode units, the total number of the voltage limiting units, the total number of the buffer units, and the total number of the controller units are equal, and the total number is a positive even number.
Preferably, when the power electronic switch group includes two or more controller units, a high-frequency power cable is used to supply power to all the controller units, and the high-frequency power cable sequentially passes through one power-taking ring of each controller from the lowest controller unit in a left-right alternating manner, and then sequentially passes through the other power-taking ring of the controller in a reverse left-right alternating manner.
The invention designs the components in the electronic circuit switch group of the direct current breaker in a modularized way, and arranges the components in a reasonable connection way, thereby realizing the miniaturization of the electronic circuit switch group, improving the strength and enhancing the expansibility of the electronic circuit switch group.
Drawings
FIG. 1 is a schematic diagram of a power electronic switch set of a DC breaker according to the present invention;
the parts in the drawings are numbered as follows: 101-metal beam I, 102-buffer unit, 103-diode unit, 104-voltage limiting unit, 105-column connector I, 106-fixing plate I, 107-column connector II, 108-fixing plate II, 109-high frequency power cable, 110-controller unit, 111-metal beam II, 112-fixing plate III, 113-IGBT unit, 114-fixing plate IV, 115-fixing plate V and 116-fixing plate VI;
FIG. 2 is a top view of a power electronic switch block of the DC breaker of the present invention;
FIG. 3 is a schematic view of a support frame of the present invention;
the parts in the drawings are numbered as follows: 201-connecting piece, 202-upright I, 203-upright II and 204-base;
FIG. 4 is a schematic diagram of a controller unit in the present invention;
the parts in the drawings are numbered as follows: 301-support, 302-controller.
Detailed Description
The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. It should be understood that the examples are illustrative only and are not limiting upon the scope of the invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Fig. 1 shows a specific structure of a dc breaker power electronic switch block of the present invention, which includes: the device comprises an IGBT module, a diode module, a voltage limiting unit, a buffer unit, a controller unit and a support frame.
The support frame mainly comprises a base 204, four columns (column one 202, column two 203) and a connecting piece 201 (see fig. 3), and mainly functions to fix each part of the power electronic switch group of the direct current breaker, so that the mutual position relationship among each part of the power electronic switch group can be optimally arranged.
The IGBT module is composed of a second fixing plate 108 at the bottom, a fifth fixing plate 115 at the top, four second column-shaped connecting pieces 107 and an IGBT unit 113 in the middle of the two fixing plates, the bottom of the IGBT module is fixed on a base 204 of the supporting frame through two second metal cross beams 111, and the top of the IGBT module is fixed on the supporting frame through two first metal cross beams 101.
The number of IGBT modules is preferably one, and the position thereof is preferably fixed at the center of the support frame. One IGBT module is formed by stacking at least two identical IGBT cells 113, the total number of the IGBT cells is preferably a positive even number, and the specific number thereof is set according to the actual needs of the engineering. Each IGBT unit consists of an IGBT and two radiators arranged on the upper surface and the lower surface of the IGBT. In the same IGBT module, two adjacent IGBT units are isolated from each other by an insulator, and preferably, an insulating layer or an insulating block, and more preferably, an insulating block is provided.
The diode module and the IGBT module are arranged side by side, preferably in close proximity. The number of the diode modules is preferably two, and more preferably, the diode modules are symmetrically arranged on both sides of the IGBT module. As shown in fig. 2, the diode module corresponding to the fixing plate six 116, the IGBT module corresponding to the fixing plate five 115, and the diode module corresponding to the fixing plate four 114 are sequentially arranged in parallel from left to right, and the diode module corresponding to the fixing plate six 116 and the diode module corresponding to the fixing plate four 114 are respectively disposed on the left and right sides of the IGBT module corresponding to the fixing plate five 115. Similar to the fixing mode of the IGBT module, the bottom of the diode module is fixed on the base 204 of the support frame by two metal beams two 111, and the top of the diode module is fixed on the support frame by two metal beams one 101.
Each diode module consists of a bottom mounting plate (mounting plate one 106 or mounting plate three 112), a top mounting plate (mounting plate four 114 or mounting plate six 116), four column connectors one 105 and two diode units 103 in the middle of the mounting plates. Each diode module contains at least one diode cell 103. When the number of the diode units 103 in the same diode module is larger than or equal to 2, the diode units are stacked to form the diode module, adjacent diode units are isolated by an insulator, an insulating layer or an insulating block is preferably arranged, and the insulating block is further preferably arranged.
In the diode module, the total number of the diode units 103 is preferably a positive even number, and the specific number is set according to the actual needs of the engineering. Each diode unit is formed by stacking four diodes and five radiators at intervals, the diode units form a bridge rectifier structure, an alternating current port is an input port, and a direct current port is an output port.
The buffer unit 102 is disposed outside the diode module. As shown in fig. 2, the two buffer units 102 are respectively located on the upper sides of the diode module corresponding to the fixing plate four 114 and the diode module corresponding to the fixing plate six 116. Whereas in fig. 3, the buffer unit 102 is located at the rear side of the diode module. One buffer unit 102 is composed of at least one capacitor and one nonlinear resistor, and the number of the specific capacitors and the nonlinear resistors is set according to the actual needs of engineering. The capacitor and the non-linear resistor are connected in series, preferably electrically connected and fixed by a conductive copper bar. As shown in fig. 3, the buffer unit 102 is fixed to the support frame by a first upright 202. In a direct current breaker power electronic switch group, the number of the buffer units 102 is the same as that of the IGBT units, and the specific number is set according to the actual needs of engineering.
The voltage limiting unit 104 is disposed outside the diode module, preferably, the voltage limiting unit 104 is disposed adjacent to the diode module, and the voltage limiting unit, the diode module and the IGBT module are disposed side by side. As shown in fig. 2, one voltage limiter 104 is disposed at the right side of the diode module corresponding to the fixed block four 114, and the other voltage limiter 104 is disposed at the left side of the diode module corresponding to the fixed block six 116. According to the arrangement sequence from left to right, the voltage limiting unit 104, the diode module corresponding to the fixed block six 116, the IGBT module corresponding to the fixed block five 115, the diode module corresponding to the fixed block four 114, and the voltage limiting unit 104 are arranged in sequence. One voltage limiting unit 104 is constituted by at least one lightning arrester. When the number of the lightning arresters is more than or equal to 2, the lightning arresters are connected in parallel. The lightning arrester is preferably electrically connected and fixed by means of a conductive copper bar. As shown in fig. 3, the pressure limiting unit 104 is fixed on the supporting frame by the second upright post 203. In a direct current breaker power electronic switch group, the number of the voltage limiting units 104 is the same as that of the IGBT units, and the specific number is set according to the actual needs of engineering.
The controller unit 110 is composed of a controller 302 and a support 301, one end of the support is connected with the controller, and the other end is connected with the IGBT unit 113 in the IGBT module. As shown in fig. 4, the bracket 301 is preferably U-shaped, and the U-shaped bracket is connected to the controller 302 through openings at both ends, and the U-shaped bracket is connected to the IGBT unit through an opening in the middle.
In the power electronic switch group of the invention, the output port of each diode unit is connected with an IGBT unit 113 in series through a conductor, thereby realizing the electrical connection of the IGBT module and the diode module. The input port of each diode unit is connected in parallel with a buffer unit 102 and a voltage limiting unit 104 through a conductor, so that the diode module, the buffer unit and the voltage limiting unit are electrically connected. The high-frequency power line 109 passes through a power taking ring of the controller 302, and isolated power supply of the controller is realized through the electromagnetic induction principle. In addition, according to the actual needs of engineering, the input port of the diode unit can be connected with a voltage-sharing resistor in parallel, so that the stable and safe operation of the power electronic switch group can be better ensured.
In the power electronic switch group, the IGBT unit, the diode unit, the buffer unit, the voltage limiting unit and the controller unit are in one-to-one correspondence. The total number of IGBT cells, the total number of diode cells, the total number of snubber cells, the total number of voltage limiting cells, and the total number of controller cells are equal and are all preferably a positive even number.
As shown in fig. 1, when a plurality of controller units are included in the power electronic switch group, one high frequency power supply cable 109 may be used to supply power to all of the controller units 110. In this case, the high-frequency power cable can pass through one power taking ring of each controller in turn in a left-right alternating mode from the controller unit at the lowest end, and then pass through the other power taking ring of the controller in turn in a left-right alternating mode. According to the actual needs of engineering, also can adopt two high frequency power supply cables, further improve the reliability of power supply.
Based on the electrical principle of the power electronic switch of the direct current breaker, the invention designs the components in the electronic circuit switch group in a modularized manner and arranges the components in a reasonable connection manner, thereby realizing the miniaturization of the electronic circuit switch group, improving the strength and enhancing the expansibility of the electronic circuit switch group. The power electronic switch group has the advantages of high space utilization rate, small occupied area, stable structure and the like. In actual engineering, factors such as the length of the conductor inside the switch group, the thickness of the conductor, the number of the constituent units in each component, the distance between the components and the like can be adjusted as required.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification, or any other related technical fields directly or indirectly, are included in the scope of the present invention.
Claims (11)
1. The utility model provides a direct current circuit breaker power electronic switch group, includes IGBT module, diode module, voltage limiting unit, buffer unit, controller unit and braced frame, its characterized in that:
the IGBT module is positioned in the center of the power electronic switch group;
the diode module and the IGBT module are arranged side by side;
the voltage limiting unit and the buffer unit are arranged on the outer side of the diode module;
the controller unit is positioned at one side of the IGBT module;
the IGBT module, the diode module, the voltage limiting unit and the buffer unit are all fixed on the support frame.
2. The dc breaker power electronic switch block of claim 1, wherein:
the power electronic switch group comprises one IGBT module and two diode modules, the IGBT module is close to the diode modules, and the diode modules are symmetrically arranged on two sides of the IGBT module;
the buffer unit and the diode module are arranged side by side;
the voltage limiting unit and the diode module are arranged side by side.
3. A dc breaker power electronic switch block as claimed in claim 2, characterized in that:
the voltage limiting unit is close to the diode module, and the voltage limiting unit, the diode module and the IGBT module are arranged side by side;
the buffer unit is adjacent to the diode module.
4. A dc breaker power electronic switch group as claimed in any one of claims 1 to 3, characterized in that:
each IGBT module comprises at least two IGBT units, and each IGBT unit consists of an IGBT and two radiators arranged on the upper surface and the lower surface of the IGBT;
IGBT units in the same IGBT module are stacked and arranged, and an insulating block is arranged between every two adjacent IGBT units.
5. A dc breaker power electronic switch group as claimed in any one of claims 1 to 3, characterized in that:
the diode module comprises at least one diode unit, each diode unit is formed by stacking four diodes and five radiators at intervals, a bridge rectifier structure is formed, an alternating current port is an input port, and a direct current port is an output port;
if the number of the diode units in the same diode module is larger than or equal to 2, the diode units in the same diode module are stacked and arranged, and an insulating block is arranged between every two adjacent diode units.
6. A dc breaker power electronic switch group as claimed in any one of claims 1 to 3, characterized in that:
one of the voltage limiting units is composed of at least one lightning arrester;
and if the number of the lightning arresters is more than or equal to 2, the lightning arresters are connected in parallel.
7. A dc breaker power electronic switch group as claimed in any one of claims 1 to 3, characterized in that:
and one buffer unit consists of at least one capacitor and at least one nonlinear resistor, wherein the capacitor and the nonlinear resistor are connected in series.
8. A dc breaker power electronic switch group as claimed in any one of claims 1 to 3, characterized in that:
and one controller unit consists of a controller and a support, wherein one end of the support is connected with the controller, and the other end of the support is connected with the IGBT module.
9. A DC breaker power electronic switch bank as claimed in claim 5, characterized in that:
the voltage limiting unit and the buffer unit are connected with the input port of the diode unit in parallel;
the output port of the diode unit is connected in series with the IGBT unit in the IGBT module.
10. A DC breaker power electronic switch bank as claimed in claim 5, characterized in that:
in one power electronic switch group, the total number of the IGBT units, the total number of the diode units, the total number of the voltage limiting units, the total number of the buffer units and the total number of the controller units are equal, and the total number is a positive even number.
11. The dc breaker power electronic switch bank of claim 8, wherein:
when the power electronic switch group comprises two or more controller units, a high-frequency power supply cable is adopted to supply power to all the controller units, and the high-frequency power supply cable sequentially penetrates through one power taking ring of each controller from the controller unit at the lowest end in a left-right alternating mode and then sequentially penetrates through the other power taking ring of the controller in a reverse left-right alternating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110873766.0A CN113488347A (en) | 2021-07-30 | 2021-07-30 | Power electronic switch group of direct current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110873766.0A CN113488347A (en) | 2021-07-30 | 2021-07-30 | Power electronic switch group of direct current breaker |
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| Publication Number | Publication Date |
|---|---|
| CN113488347A true CN113488347A (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110873766.0A Pending CN113488347A (en) | 2021-07-30 | 2021-07-30 | Power electronic switch group of direct current breaker |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786403A (en) * | 2016-11-22 | 2017-05-31 | 华北电力大学 | A kind of DC solid circuit breaker with continuous current circuit |
| CN107919657A (en) * | 2017-12-22 | 2018-04-17 | 清华四川能源互联网研究院 | A kind of superhigh voltage DC breaker power electronics bypass valve tower structure |
| CN107947535A (en) * | 2017-12-22 | 2018-04-20 | 清华四川能源互联网研究院 | A kind of superhigh voltage DC breaker power electronics tributary unit |
| CN207588445U (en) * | 2017-12-22 | 2018-07-06 | 清华四川能源互联网研究院 | A kind of superhigh voltage DC breaker power electronics bypass valve segment structure |
| CN111384708A (en) * | 2018-12-28 | 2020-07-07 | 许继集团有限公司 | Main branch valve component for direct current breaker |
| CN111884179A (en) * | 2020-07-08 | 2020-11-03 | 北京电力设备总厂有限公司 | Valve tower of direct current circuit breaker |
-
2021
- 2021-07-30 CN CN202110873766.0A patent/CN113488347A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786403A (en) * | 2016-11-22 | 2017-05-31 | 华北电力大学 | A kind of DC solid circuit breaker with continuous current circuit |
| CN107919657A (en) * | 2017-12-22 | 2018-04-17 | 清华四川能源互联网研究院 | A kind of superhigh voltage DC breaker power electronics bypass valve tower structure |
| CN107947535A (en) * | 2017-12-22 | 2018-04-20 | 清华四川能源互联网研究院 | A kind of superhigh voltage DC breaker power electronics tributary unit |
| CN207588445U (en) * | 2017-12-22 | 2018-07-06 | 清华四川能源互联网研究院 | A kind of superhigh voltage DC breaker power electronics bypass valve segment structure |
| CN111384708A (en) * | 2018-12-28 | 2020-07-07 | 许继集团有限公司 | Main branch valve component for direct current breaker |
| CN111884179A (en) * | 2020-07-08 | 2020-11-03 | 北京电力设备总厂有限公司 | Valve tower of direct current circuit breaker |
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