CN210016276U - Equivalent valve group of direct current breaker - Google Patents
Equivalent valve group of direct current breaker Download PDFInfo
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- CN210016276U CN210016276U CN201921149136.3U CN201921149136U CN210016276U CN 210016276 U CN210016276 U CN 210016276U CN 201921149136 U CN201921149136 U CN 201921149136U CN 210016276 U CN210016276 U CN 210016276U
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Abstract
The utility model relates to a direct current breaker equivalent valves, include the support and install the valve cluster on the support, RCD subassembly and bypass switch subassembly, the valve cluster includes two, and every valve cluster is including the forward IGBT and the reverse IGBT of establishing ties, and two IGBT that syntropy set up in two valve clusters are parallelly connected, the RCD subassembly includes two sets ofly, parallelly connected with forward IGBT and reverse IGBT respectively, every group RCD subassembly includes electric capacity respectively, resistance and diode, electric capacity is parallelly connected with the diode after establishing ties with resistance, the bypass switch subassembly includes two sets ofly, parallelly connected with forward IGBT and reverse IGBT respectively, and every group bypass switch subassembly includes bypass switch respectively. The utility model discloses lead to can reduce holistic volume on guaranteeing the basis unanimous with direct current circuit breaker main branch function to satisfy test platform or test equipment's such as incubator dimensional requirement, thereby be convenient for experimental operation.
Description
Technical Field
The utility model belongs to the technical field of direct current circuit breaker, concretely relates to direct current circuit breaker equivalence valves.
Background
The high-voltage direct-current circuit breaker is core equipment for constructing a multi-terminal flexible direct-current system, and can improve the economical efficiency and reliability of system operation. The direct current breaker can quickly break short-circuit fault current in a direct current system, cut off a fault line and realize the isolation of the converter station and a fault point within milliseconds. The main branch circuit is an important component of the direct current circuit breaker, can bear the rated current of a system for a long time and bear the fault current of the system for a short time, and realizes forced commutation by instant locking of the fault.
With the development of the high-voltage direct-current circuit breaker technology, the requirements of the direct-current circuit breaker test are met. The existing direct current breaker has a complex structure and a large volume, so that the existing direct current breaker is limited by the size and cannot enter a test platform when tests such as high and low temperature environment tests, extreme high temperature environment tests, aging tests and the like are carried out.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a direct current breaker equivalent valve group to solve its problem that can't satisfy experimental demand.
The utility model discloses a direct current breaker equivalent valves realizes like this:
the utility model provides a direct current breaker equivalent valves, includes the support and installs valve cluster, RCD subassembly and bypass switch subassembly on the support, the valve cluster includes two, and every valve cluster is including the forward IGBT and the reverse IGBT who establish ties, and two IGBT that set up in the syntropy in two valve clusters are parallelly connected, the RCD subassembly includes two sets ofly, connects in parallel with forward IGBT and reverse IGBT respectively, and every group RCD subassembly includes electric capacity, resistance and diode respectively, electric capacity and resistance are parallelly connected after establishing ties with the diode, the bypass switch subassembly includes two sets ofly, connects in parallel with forward IGBT and reverse IGBT respectively, and every group bypass switch subassembly includes bypass switch respectively.
Further, the support includes two liang of upper and lower openings back on the back mutually and the C type insulating beam that sets up in pairs, and two valve clusters are installed side by side between two pairs of C type insulating beams, the RCD subassembly sets up the outside at one of them valve cluster, the bypass switch subassembly is the formula of sinking and sets up the below of valve cluster.
Furthermore, universal wheels are respectively installed at two ends of the two C-shaped insulating beams positioned below.
Furthermore, two IGBTs in the same direction are connected in parallel through a copper bar I.
Furthermore, a pair of driving modules is arranged above the valve string, each driving module is connected with two adapters respectively, and the adapters connected with the same driving module are connected with two IGBTs in the same direction.
Furthermore, one ends of the two driving modules are mounted on radiators of the two IGBTs of the same valve string through metal supports, and the other ends of the two driving modules are mounted on radiators of the two IGBTs of the other valve string through metal supports and insulating cushion blocks.
Furthermore, a pair of energy supply coils is arranged on the valve string at the end part and respectively connected with the two driving modules.
Furthermore, every bypass switch subassembly is still including setting up the bypass switch energy supply coil in bypass switch one side to and set up the control module of bypass switch opposite side, bypass switch links to each other with control module, control module links to each other with bypass switch energy supply coil.
Furthermore, the bypass switches are connected with the copper bars I connected with the IGBTs in parallel in the same direction through the copper bars II respectively.
Furthermore, an external power supply connecting copper bar is arranged between the two equidirectional IGBTs.
After the technical scheme is adopted, the utility model discloses the beneficial effect who has does:
(1) the utility model concentrates the valve string, the RCD component and the bypass switch component on the bracket, and can reduce the whole volume on the basis of ensuring the function consistency with the main branch of the direct current breaker so as to meet the size requirement of test equipment such as a test platform or a temperature box, thereby facilitating the operation of the test;
(2) the RCD component forms an RCD loop and is respectively connected with the IGBTs in two directions in parallel, so that the functions of buffering and protecting the IGBTs can be achieved;
(3) the utility model discloses well bypass switch connects in parallel with the IGBT of two directions respectively, and when electric current in a certain IGBT return circuit exceeded and endured the electric current, can play the guard action to the IGBT through bypass switch's closure.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a structural diagram of an equivalent valve group of a dc circuit breaker according to a preferred embodiment of the present invention;
fig. 2 is a structural diagram of an equivalent valve group of the dc circuit breaker according to the preferred embodiment of the present invention;
fig. 3 is a front view of an equivalent valve group of the dc circuit breaker according to the preferred embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
fig. 5 is a top view of the dc circuit breaker equivalent valve set according to the preferred embodiment of the present invention;
FIG. 6 is an enlarged view of portion B of FIG. 5;
fig. 7 is a left side view of the dc circuit breaker equivalent valve block of the preferred embodiment of the present invention;
FIG. 8 is a cross-sectional view taken along line C-C of FIG. 7;
fig. 9 is a structural diagram of two valve strings of the equivalent valve group of the dc circuit breaker of the preferred embodiment of the present invention;
fig. 10 is a block diagram of two valve strings of an equivalent valve block of a dc circuit breaker according to a preferred embodiment of the present invention;
in the figure: the structure comprises a support 1, a C-shaped insulating beam 101, universal wheels 102, a U-shaped frame 103, a valve string 2, an IGBT201, a compression end plate 202, a pull rod 203, a radiator 204, a disc spring 205, a cushion block 206, lightening holes 207, radiator fins 208, a copper bar I209, a driving module 210, an adapter 211, a metal support 212, an insulating cushion block 213, an energy supply coil 214, an external power supply connection copper bar 215, an RCD assembly 3, a capacitor 301, a resistor 302, a diode 303, a U-shaped seat 304, a copper bar III 305, a copper bar IV 306, a metal frame 307, a bypass switch assembly 4, a bypass switch 401, a bypass switch energy supply coil 402, a control module 403 and a copper bar II 404.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-10, an equivalent valve group of a direct current breaker comprises a support 1 and valve strings 2 installed on the support 1, two RCD assemblies 3 and a bypass switch assembly 4, wherein each valve string 2 comprises two forward IGBTs and two reverse IGBTs connected in series, two IGBTs 201 arranged in the two valve strings 2 in the same direction are connected in parallel, each RCD assembly 3 comprises two groups and is connected in parallel with the forward IGBTs and the reverse IGBTs respectively, each group of RCD assemblies 3 comprises a capacitor 301, a resistor 302 and a diode 303 respectively, the capacitor 301 is connected in parallel with the diode 303 after being connected in series with the resistor 302, the bypass switch assembly 4 comprises two groups and is connected in parallel with the forward IGBTs and the reverse IGBTs respectively, and each group of bypass switch assemblies 4 comprises a bypass switch 401 respectively.
Referring to fig. 9-10, specifically, each valve string 2 includes two compression end plates 202 and a tie rod 203 connected between the compression end plates 202, two IGBTs 201 connected in series in an opposite direction and radiators 204 installed on both sides of each IGBT201 are disposed between the two compression end plates 202, and a disc spring 205 is disposed between one compression end plate 202 and a heat sink 204 adjacent to the compression end plate, and the disc spring 205 is disposed to facilitate pressurization and pressure relief of the valve string 2.
The two valve strings 2 are adopted to play a shunting role, so that the valve strings 2 and the whole equivalent valve bank of the direct current circuit breaker are protected.
The utility model discloses an it is integrated on support 1 with valve cluster 2, RCD subassembly 3 and bypass switch subassembly 4, wherein support 1 includes two liang of upper and lower openings back of the body mutually and the C type insulating beam 101 that sets up in pairs, and two valve clusters 2 are installed side by side between two pairs of C type insulating beams 101, and RCD subassembly 3 sets up in the outside of one of them valve cluster 2, and bypass switch subassembly 4 is the formula of sinking and sets up in the below of valve cluster 2.
Specifically, the compression end plate 202 of the valve string 2 is disposed between the upper and lower opposite C-shaped insulating beams 101 and fixed by bolts, and in order to facilitate parallel connection of the equidirectional IGBTs 201 and connection with the bypass switch assembly 4, the bottom of the compression end plate 202 is provided with a spacer 206.
Preferably, the compression end plate 202, the disc spring 205 and the cushion block 206 are made of aluminum, so that the weight of the whole equivalent valve group can be reduced properly. In addition, the weight-reducing holes 207 are formed in the compression end plate 202, so that the mass of the equivalent valve bank can be further reduced, the force can be conveniently applied through the weight-reducing holes in a handheld mode, and the moving convenience of the valve string 2 is improved.
Preferably, the C-shaped insulating beam 101 is made of epoxy insulating material.
Preferably, in order to increase the uniformity and simplicity of the distribution of the positions of the diode 303, the resistor 302 and the capacitor 301, the diode 303 is connected to the heat sink fin 208 of the heat sink 204 of the IGBT201 close to the compression end plate 202, and the parallel connection end of the resistor 302 and the capacitor 301 is connected to the heat sink fin 208 of the other heat sink 204 of the IGBT 201.
Specifically, the diode 303 is connected in series with the capacitor 301 through the copper bar iii 305, the capacitor 301 is connected in series with the heat sink fin 208 through the copper bar iv 306, and two ends of the resistor 302 are connected in parallel to the copper bar iii 305 and the copper bar iv 306 through the metal frame 307.
The support 1 adopts four C type insulating beams 101 that two liang set up in pairs, and valve cluster 2 and RCD subassembly 3 do not surpass C type insulating beam 101's tip when the installation to the position of at least one electric capacity 301 does not surpass C type insulating beam 101's side, can realize like this that the form of placing is upright in three directions of height, length, width to satisfy experimental requirements such as EMC.
In order to facilitate the operation of the equivalent valve group, two ends of two C-shaped insulating beams 101 located below are respectively provided with universal wheels 102.
The universal wheels 102 can be operated during movement of the equivalent valve block to improve the ease of movement.
When the IGBTs 201 arranged in the same direction are connected in parallel, in order to simplify the parallel lines, the two IGBTs 201 in the same direction are connected in parallel through a copper bar I209.
Specifically, radiator fins 208 are arranged below the radiators 204 on the two sides of the IGBT201, and the copper bars I209 are used for correspondingly connecting the radiator fins 208 of the two IGBTs 201 in the same direction in pairs respectively, so that the parallel connection of the IGBTs in the same direction in the two valve strings is realized.
In order to ensure the normal operation of the IGBTs 201, a pair of driving modules 210 is disposed above the valve string 2, and two adapters 211 are respectively connected to each driving module 210, and the adapter 211 connected to the same driving module 210 is connected to two IGBTs 201 in the same direction.
Specifically, two driving modules 210 are arranged in parallel in the direction of installing IGBTs 201 in series, adapters 211 connected with the driving modules are arranged on two sides of the driving modules, the adapters 211 are arranged on the radiators 204 adjacent to the two IGBTs 201 on the valve string 2 and are connected with the IGBTs 201 opposite to the driving modules through connecting wires, and the driving modules 210 are connected with the adapters 211 on two sides of the driving modules through connecting wires, namely, the adapters 211 connected with the IGBTs 201 in the same direction are connected.
Optionally, the drive module may be a drive module of NR0618C manufactured by nanyu electric company ltd, and the adapter may be an adapter of NR0665EXT1A and NR0665EXT1B manufactured by nanyu electric company ltd.
In order to prevent backflow, one end of each of the two driving modules 210 is mounted on the heat sinks 204 of the two IGBTs 201 of the same valve string 2 through a metal bracket 212, and the other end is mounted on the heat sinks 204 of the two IGBTs 201 of the other valve string 2 through a metal bracket 212 and an insulating spacer 213.
The end portion directly connected to the heat sink 204 through the metal bracket 212 may make the driving module 210 and the heat sink 204 have the same electric potential, and the end portion where the metal bracket 212 and the insulating pad 213 are mounted realizes the insulation therebetween, so as to prevent the through-flow loop from forming on the driving module 210.
In order to supply the drive modules 210 with electrical energy, a pair of power supply coils 214 is provided on the end valve string 2, and the power supply coils 214 are connected to the two drive modules 210, respectively.
To enable the bypass switch assemblies 4 to be energized, each bypass switch assembly 4 further includes a bypass switch energizing coil 402 disposed on one side of the bypass switch 401, and a control module 403 disposed on the other side of the bypass switch 401, the bypass switch 401 being connected to the control module 403, the control module 403 being connected to the bypass switch energizing coil 402.
The bypass switch power supply coil 402 supplies power to the control module 403, and the control module 403 is used for controlling the on/off of the bypass switch 401.
Specifically, a plurality of sunken U-shaped frames 103 are arranged between two lower C-shaped insulating beams 101, and a bypass switch 401, a bypass switch energy supply coil 402 and a control module 403 are all mounted on the U-shaped frames 103.
The bypass switch 401 plays a role in protecting the IGBT201, and therefore the bypass switch 401 is connected with the two parallel-connected IGBT201 in the same direction through the copper bar II 404 and the copper bar I209 connected with the IGBT201 in the same direction in parallel.
Specifically, two copper bars II 404 on the bypass switch 401 are connected with two copper bars I209 connected in parallel with the same-direction IGBT201 in a one-to-one correspondence manner, and parallel connection with the IGBT201 is achieved.
In order to connect an external high-voltage power supply and a low-voltage power supply conveniently, an external power supply connecting copper bar 215 is arranged between the two equidirectional IGBTs 201.
Specifically, the external power supply connection copper bars 215 are respectively connected with the copper bars i 209 close to the compression end plates 202. Wherein, the external power supply connecting copper bar 215 positioned on the positive IGBT side is used for connecting a high-voltage power supply, and the external power supply connecting copper bar 215 positioned on the reverse IGBT side is used for connecting a low-voltage power supply.
The utility model discloses a working principle of direct current breaker equivalent valves as follows:
due to the unidirectional current-carrying property of the diode 303, when the forward current is switched on, the current passes through all the IGBTs 201 and the RCD loop connected with the forward IGBT in parallel, and the RCD loop connected with the reverse IGBT in parallel does not pass; when the reverse current is turned on, the current flows through all the IGBTs 201 and the RCD circuit connected in parallel to the reverse IGBT, but the RCD circuit connected in parallel to the forward IGBT does not flow, and thus the current flows in both directions.
When the equivalent valve group normally works, the bypass switch 401 is in an open state, current passes through the IGBT201, when the equivalent valve group breaks down, namely fault current exceeds withstand current, the bypass switch 401 is closed, and the fault current is discharged through the bypass switch 401, so that the IGBT201 is protected.
Specifically, when the current of one of the forward IGBTs exceeds the withstand current or the current of both the forward IGBTs exceeds the withstand current, the bypass switch 401 connected in parallel with the forward IGBT will be closed to short-circuit the paths of the two IGBTs 201. The same is true for the reverse IGBT.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a direct current breaker equivalent valve group, its characterized in that, include support (1) and install valve cluster (2), RCD subassembly (3) and bypass switch subassembly (4) on support (1), valve cluster (2) include two, and every valve cluster (2) are including the forward IGBT and the reverse IGBT who establish ties, and two IGBT (201) that syntropy set up in two valve clusters (2) are parallelly connected, RCD subassembly (3) include two sets ofly, connect in parallel with forward IGBT and reverse IGBT respectively, and every group RCD subassembly includes electric capacity (301), resistance (302) and diode (303) respectively, electric capacity (301) and resistance (302) are parallelly connected after establishing ties, bypass switch subassembly (4) include two sets ofly, connect in parallel with forward IGBT and reverse IGBT respectively, and every group bypass switch subassembly (4) include bypass switch (401) respectively.
2. The equivalent valve group of the direct current circuit breaker according to claim 1, characterized in that the bracket (1) comprises two pairs of C-shaped insulating beams (101) with opposite upper and lower openings, two valve strings (2) are installed between two pairs of C-shaped insulating beams (101) in parallel, the RCD assembly (3) is arranged on the outer side of one of the valve strings (2), and the bypass switch assembly (4) is arranged under the valve string (2) in a sinking manner.
3. The equivalent valve group of the direct current circuit breaker according to claim 2, characterized in that the two lower C-shaped insulating beams (101) are respectively equipped with universal wheels (102) at both ends.
4. The equivalent valve group of direct current circuit breakers according to claim 1, characterized in that two IGBTs (201) in the same direction are connected in parallel by means of a copper bar i (209).
5. The equivalent valve group of a direct current circuit breaker according to claim 1, characterized in that a pair of driving modules (210) is arranged above the valve string (2), and two adapters (211) are respectively connected to each driving module (210), and the adapter (211) connected to the same driving module (210) is connected to two IGBTs (201) in the same direction.
6. The equivalent valve group of direct current circuit breakers according to claim 5, characterized in that one end of the two driving modules (210) is mounted on the radiators (204) of the two IGBTs (201) of the same valve string (2) through a metal bracket (212), and the other end is mounted on the radiators (204) of the two IGBTs (201) of the other valve string (2) through a metal bracket (212) and an insulating spacer (213).
7. Equivalent valve group of dc circuit breakers according to claim 5, characterized in that on the valve string (2) at the end there is provided a pair of energizing coils (214), said energizing coils (214) being connected to the two driving modules (210) respectively.
8. The equivalent valve group of direct current circuit breakers according to claim 1, characterized in that each bypass switch assembly (4) further comprises a bypass switch energizing coil (402) arranged on one side of the bypass switch (401), and a control module (403) arranged on the other side of the bypass switch (401), the bypass switch (401) being connected to the control module (403), the control module (403) being connected to the bypass switch energizing coil (402).
9. The equivalent valve group of a direct current circuit breaker according to claim 4, characterized in that the bypass switches (401) are respectively connected with the copper bar I (209) connected in parallel with the same-direction IGBT (201) through the copper bar II (404).
10. The equivalent valve group of a direct current circuit breaker according to claim 1, characterized in that an external power connection copper bar (215) is arranged between two equidirectional IGBTs (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921149136.3U CN210016276U (en) | 2019-07-19 | 2019-07-19 | Equivalent valve group of direct current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921149136.3U CN210016276U (en) | 2019-07-19 | 2019-07-19 | Equivalent valve group of direct current breaker |
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| Publication Number | Publication Date |
|---|---|
| CN210016276U true CN210016276U (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921149136.3U Active CN210016276U (en) | 2019-07-19 | 2019-07-19 | Equivalent valve group of direct current breaker |
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| CN (1) | CN210016276U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265985A (en) * | 2019-07-19 | 2019-09-20 | 常州博瑞电力自动化设备有限公司 | A kind of equivalent valve group of dc circuit breaker |
| CN112736751A (en) * | 2020-12-08 | 2021-04-30 | 平高集团有限公司 | Offshore wind power networking direct current breaker |
-
2019
- 2019-07-19 CN CN201921149136.3U patent/CN210016276U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265985A (en) * | 2019-07-19 | 2019-09-20 | 常州博瑞电力自动化设备有限公司 | A kind of equivalent valve group of dc circuit breaker |
| CN112736751A (en) * | 2020-12-08 | 2021-04-30 | 平高集团有限公司 | Offshore wind power networking direct current breaker |
| CN112736751B (en) * | 2020-12-08 | 2023-03-24 | 平高集团有限公司 | Offshore wind power networking direct current breaker |
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