CN105429099A - High-voltage DC quick circuit breaker and power sub-module thereof - Google Patents
High-voltage DC quick circuit breaker and power sub-module thereof Download PDFInfo
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- CN105429099A CN105429099A CN201610000895.8A CN201610000895A CN105429099A CN 105429099 A CN105429099 A CN 105429099A CN 201610000895 A CN201610000895 A CN 201610000895A CN 105429099 A CN105429099 A CN 105429099A
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- reverse
- power switch
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- pair forward
- voltage
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/025—Current limitation using field effect transistors
Abstract
The invention relates to a high-voltage DC quick circuit breaker and a power sub-module thereof. The high-voltage DC quick circuit breaker comprises a mechanical isolating switch, a main through-flow branch and a current transfer branch. A circuit which is formed through serially connecting the mechanical isolating switch and the main through-flow branch is parallelly connected with the current transfer branch. The current transfer branch is composed of a plurality of serially connected power sub-modules. Each power sub-module is a mixed sub-module and comprises the components of a pair of power transistors which are serially connected in a forward-and-reverse direction, a pair of power transistors which are parallelly connected in the forward-and-reverse direction, two voltage sharing resistors and a voltage sharing capacitor. Compared with a DC circuit breaker in which a fully controlled device or an H-bridge is used, the high-voltage DC quick circuit breaker is advantageous in that the number of serially connected modules is 1/3-1/2 of that of the previous DC circuit breaker, thereby greatly reducing size of the DC circuit breaker and reducing cost.
Description
Technical field
The present invention relates to a kind of high-voltage DC rapid breaker and power modules thereof, belong to technical field of HVDC transmission.
Background technology
At present, the power modules in high voltage DC breaker, topological structure mainly contains the IGBT module of forward and reverse cascaded structure, and the IGBT module of H bridge construction.During due to DC circuit breaker disconnection direct current, can produce very high direct current transient voltage at circuit breaker two ends, therefore, need a lot of submodule of connecting in DC circuit breaker transfer branch road, cause the bulky of DC circuit breaker, cost is high.
Summary of the invention
The object of this invention is to provide a kind of high-voltage DC rapid breaker, large for solving existing DC circuit breaker volume, the problem that cost is high.Meanwhile, present invention also offers a kind of power modules.
For achieving the above object, the solution of the present invention comprises:
A kind of high-voltage DC rapid breaker, comprise mechanical isolation switch, main through-flow branch road and current transfer branch road, the circuit that described mechanical isolation switch and main through-flow branch road series connection are formed and described current transfer branch circuit parallel connection, the power modules that described current transfer props up the some series connection of route is formed, described power modules is mixed type submodule, comprise: two power switch pipes of a pair forward and reverse series connection, the power switch pipe of a pair forward and reverse parallel connection, two grading resistors and equalizing capacitance; Two grading resistor series connection, the grading resistor that equalizing capacitance is connected with two is in parallel, one of them grading resistor and described a pair forward and reverse two power switch pipe parallel connection of connecting, and another grading resistor is in parallel with described a pair forward and reverse power switch pipe in parallel.
The power modules forming described major flow branch road is also mixed type submodule, comprising: two power switch pipes of a pair forward and reverse series connection, the power switch pipe of a pair forward and reverse parallel connection, two grading resistors and equalizing capacitance; Two grading resistor series connection, the grading resistor that equalizing capacitance is connected with two is in parallel, one of them grading resistor and described a pair forward and reverse two power switch pipe parallel connection of connecting, and another grading resistor is in parallel with described a pair forward and reverse power switch pipe in parallel.
Two power switch pipes of described a pair forward and reverse series connection are for entirely to control device; The power switch pipe of a pair forward and reverse parallel connection is half control device.
Described full control device is IGBT, and described half control device is thyristor.
Described thyristor is the photo thyristor being configured with BOD forced-triggered.
Present invention also offers a kind of power modules, described power modules is mixed type submodule, comprising: two power switch pipes of a pair forward and reverse series connection, the power switch pipe of a pair forward and reverse parallel connection, two grading resistors and equalizing capacitance; Two grading resistor series connection, the grading resistor that equalizing capacitance is connected with two is in parallel, one of them grading resistor and described a pair forward and reverse two power switch pipe parallel connection of connecting, and another grading resistor is in parallel with described a pair forward and reverse power switch pipe in parallel.
Two power switch pipes of described a pair forward and reverse series connection are for entirely to control device; The power switch pipe of a pair forward and reverse parallel connection is half control device.
Described full control device is IGBT, and described half control device is thyristor.
Described thyristor is the photo thyristor being configured with BOD forced-triggered.
The present invention adopts the mixed type sub modular structure having IGBT and photo thyristor to be together in series, and effectively reduces the serial number of DC circuit breaker module, reduces volume and the cost of DC circuit breaker, for the through engineering approaches application of DC circuit breaker creates convenience.
Accompanying drawing explanation
Fig. 1 is high voltage DC breaker circuit theory diagrams of the present invention;
Fig. 2 is mixed type submodule schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
DC circuit breaker embodiment
As shown in Figure 1 and Figure 2.High voltage DC breaker comprises: mechanical isolation switch, main through-flow branch road (connecting with mechanical isolation switch), current transfer branch road, lightning arrester.Mechanical isolation switch and the series connection of major flow branch road, in parallel with current transfer branch road, lightning arrester after series connection.Main through-flow branch road and current transfer branch road are composed in series by mixed type submodule, and as in Fig. 1, current transfer props up several power modules of route SM1, SM2 ... SMn is in series, and it is in series that major flow props up route two power modules.
Each mixed type submodule (as shown in Figure 2) has the full control device IGBT (1T1,1T2) of forward and reverse series connection, the photo thyristor (1T3,1T4) of forward and reverse parallel connection, additional grading resistor (1R1,1R2), and equalizing capacitance 1C1 form.Two grading resistor (1R1,1R2) connect, the grading resistor that equalizing capacitance 1C1 connects with two is in parallel, one of them grading resistor 1R1 and a pair forward and reverse IGBT(1T1,1T2 connected) in parallel, another grading resistor 1R2 is in parallel with a pair forward and reverse photo thyristor (1T3,1T4) in parallel.
Its operation principle is as follows:
Electric current in major loop flows through under normal circumstances from mechanical isolation switch and main through-flow branch road, does not have electric current to flow through in transfer branch road.
When DC circuit breaker starts, all IGBT of transfer branch road are all in off-state, and photo thyristor turns off.IGBT in main through-flow branch road and photo thyristor, open-minded according to the choice of flow direction of electric current, if electric current is from left to right.Need IGBTZT12 and the photo thyristor ZT14 of first module opened as shown in the figure, and the IGBTZT21 of another module and photo thyristor ZT24.Once through-flow major loop has electric current to flow through, photo thyristor trigger impulse should be cancelled, if because thyristor electric current not zero passage can maintain conducting, can not turn off.
When hvdc transmission line short trouble, in through-flow branch road, the IGBT of mixed type submodule turns off, and starts mechanical isolating switch separating brake simultaneously.Control to shift the IGBT in branch road and photo thyristor conducting according to current direction: when electric current forward () flows through in Fig. 1 from left to right, control IGBT (1T2) and photo thyristor (1T4) conducting of forward in the submodule of all series connection simultaneously simultaneously.When electric current flows counterflow through, control IGBT (1T1) reverse in the submodule of all series connection and photo thyristor (1T3) conducting simultaneously.Direct current in main through-flow branch road is transferred in transfer branch road.
When control device detects that mechanical isolation switch disconnects, turn off the IGBT of all submodules in transfer branch road, photo thyristor is because electric current is zero shutoff naturally.Direct current in transfer branch road is transferred in the electric capacity in all sub-series modules immediately, and gives capacitor charging, and capacitor terminal voltage raises, and transfer branch road both end voltage increases.Once the voltage at transfer branch road two ends exceedes the protection voltage of lightning arrester, lightning arrester conducting pressure limiting, current transfer is in lightning arrester.After the remaining energy of direct current is absorbed by lightning arrester, whole DC circuit breaker is provided with the ability blocking high-voltage dc voltage completely, reaches the object of quick disjunction DC line.
Concrete, wherein grading resistor, the rated operational voltage according to the light-operated GBT of I and thyristor designs, if the rated operational voltage being specially IGBT is 2000V, the rated operational voltage of thyristor is 8000V, and so the resistance ratio of two direct current grading resistors is exactly 2000:8000=4.The off state voltage that thyristor bears is 4 times that IGBT bears voltage.That is, a H bridge be made up of IGBT, its rated voltage is 2000V, and so adopt mixed type submodule of the present invention, its rated operational voltage can reach 10000V, and therefore, the quantity of the submodule of whole transfer branch road series connection is less than original about 1 half.Greatly reduce volume and the cost of DC circuit breaker.It should be noted that, grading resistor (1R1,1R2) is here all large valued resistor of resistance hundred K Ω level.
In order to protect thyristor, configuration BOD forced-triggered in the photo thyristor in all mixed type submodules.Ensure the safe operation of thyristor.
In above embodiment, major flow branch road and current transfer branch road are formed by mixing submodule, as other execution modes, major flow branch road due to the power modules related to less, also can adopt the submodule topology of prior art, as H bridge, half-bridge etc.
In addition, the IGBT in above embodiment can also be substituted by the full control device of other types; Thyristor can be substituted by the half control device of other types or full control device.
About power modules embodiment, owing to being described in detail in the embodiment above, therefore repeat no more.
More than provide a kind of concrete execution mode, but the present invention is not limited to described execution mode.Basic ideas of the present invention are such scheme, for those of ordinary skill in the art, according to instruction of the present invention, designing the model of various distortion, formula, parameter does not need to spend creative work, as the photo thyristor in submodule changes automatically controlled thyristor etc. into.The change carried out execution mode without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.
Claims (9)
1. a high-voltage DC rapid breaker, comprise mechanical isolation switch, main through-flow branch road and current transfer branch road, the circuit that described mechanical isolation switch and main through-flow branch road series connection are formed and described current transfer branch circuit parallel connection, the power modules that described current transfer props up the some series connection of route is formed, it is characterized in that, described power modules is mixed type submodule, comprise: two power switch pipes of a pair forward and reverse series connection, the power switch pipe of a pair forward and reverse parallel connection, two grading resistors and equalizing capacitance; Two grading resistor series connection, the grading resistor that equalizing capacitance is connected with two is in parallel, one of them grading resistor and described a pair forward and reverse two power switch pipe parallel connection of connecting, and another grading resistor is in parallel with described a pair forward and reverse power switch pipe in parallel.
2. a kind of high-voltage DC rapid breaker according to claim 1, it is characterized in that, the power modules forming described major flow branch road is also mixed type submodule, comprise: two power switch pipes of a pair forward and reverse series connection, the power switch pipe of a pair forward and reverse parallel connection, two grading resistors and equalizing capacitance; Two grading resistor series connection, the grading resistor that equalizing capacitance is connected with two is in parallel, one of them grading resistor and described a pair forward and reverse two power switch pipe parallel connection of connecting, and another grading resistor is in parallel with described a pair forward and reverse power switch pipe in parallel.
3. a kind of high-voltage DC rapid breaker according to claim 1 and 2, is characterized in that, two power switch pipes of described a pair forward and reverse series connection are for entirely to control device; The power switch pipe of a pair forward and reverse parallel connection is half control device.
4. a kind of high-voltage DC rapid breaker according to claim 3, is characterized in that, described full control device is IGBT, and described half control device is thyristor.
5. a kind of high-voltage DC rapid breaker according to claim 4, is characterized in that, described thyristor is the photo thyristor being configured with BOD forced-triggered.
6. a power modules, is characterized in that, described power modules is mixed type submodule, comprising: two power switch pipes of a pair forward and reverse series connection, the power switch pipe of a pair forward and reverse parallel connection, two grading resistors and equalizing capacitance; Two grading resistor series connection, the grading resistor that equalizing capacitance is connected with two is in parallel, one of them grading resistor and described a pair forward and reverse two power switch pipe parallel connection of connecting, and another grading resistor is in parallel with described a pair forward and reverse power switch pipe in parallel.
7. a kind of power modules according to claim 6, is characterized in that, two power switch pipes of described a pair forward and reverse series connection are for entirely to control device; The power switch pipe of a pair forward and reverse parallel connection is half control device.
8. a kind of power modules according to claim 7, is characterized in that, described full control device is IGBT, and described half control device is thyristor.
9. a kind of power modules according to claim 8, is characterized in that, described thyristor is the photo thyristor being configured with BOD forced-triggered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610000895.8A CN105429099A (en) | 2016-01-04 | 2016-01-04 | High-voltage DC quick circuit breaker and power sub-module thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610000895.8A CN105429099A (en) | 2016-01-04 | 2016-01-04 | High-voltage DC quick circuit breaker and power sub-module thereof |
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| CN105429099A true CN105429099A (en) | 2016-03-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106230413A (en) * | 2016-08-18 | 2016-12-14 | 平高集团有限公司 | A kind of mixed type high voltage DC breaker and power cell thereof |
| CN106532661A (en) * | 2016-11-22 | 2017-03-22 | 平高集团有限公司 | Opening control method for high-voltage direct-current circuit breaker |
| CN111049409A (en) * | 2020-01-06 | 2020-04-21 | 阳光电源股份有限公司 | Voltage mixed type clamp type three-level inverter circuit and application device thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106230413A (en) * | 2016-08-18 | 2016-12-14 | 平高集团有限公司 | A kind of mixed type high voltage DC breaker and power cell thereof |
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| CN106532661A (en) * | 2016-11-22 | 2017-03-22 | 平高集团有限公司 | Opening control method for high-voltage direct-current circuit breaker |
| CN106532661B (en) * | 2016-11-22 | 2019-08-06 | 平高集团有限公司 | A kind of separating brake control method of high voltage DC breaker |
| CN111049409A (en) * | 2020-01-06 | 2020-04-21 | 阳光电源股份有限公司 | Voltage mixed type clamp type three-level inverter circuit and application device thereof |
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Application publication date: 20160323 |
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