CN114243746A - Redundancy bypass circuit of flexible direct current power module - Google Patents
Redundancy bypass circuit of flexible direct current power module Download PDFInfo
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- CN114243746A CN114243746A CN202111556274.5A CN202111556274A CN114243746A CN 114243746 A CN114243746 A CN 114243746A CN 202111556274 A CN202111556274 A CN 202111556274A CN 114243746 A CN114243746 A CN 114243746A
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- 239000003990 capacitor Substances 0.000 claims abstract description 44
- 238000004146 energy storage Methods 0.000 claims abstract description 29
- 230000005284 excitation Effects 0.000 claims abstract description 23
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims abstract description 3
- 239000013307 optical fiber Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power Conversion In General (AREA)
Abstract
A redundant bypass circuit of a flexible direct-current power module comprises a direct-current capacitor of a power module, an energy-taking power supply, a bypass driving board, a bypass switch, a divider resistor, a local module control board and a proximity module control board, wherein the input side of the energy-taking power supply is connected to two ends of the direct-current capacitor in parallel, the output side of the energy-taking power supply is connected with the bypass driving board, the divider resistor is connected to two ends of the direct-current capacitor to play a role in discharging the direct-current capacitor, and the bypass driving board is communicated with the local module control board and the proximity module control board through optical signals; in the flexible direct-current power module, the bypass switch can be ensured to be switched on by electrifying any excitation coil in the main bypass loop or the redundant bypass loop; a first resistor and a second resistor in the divider resistor are connected in series and then connected in parallel with the direct current capacitor; the energy taking power supply outputs power to the energy storage capacitor of the main bypass circuit; the divider resistor and the series point supply power for an energy storage capacitor of the redundancy bypass circuit; the invention provides the main bypass loop and the redundant bypass loop for the flexible direct current power module, has mutual independence and strong anti-jamming capability, effectively improves the reliability of the bypass of the power module, and lays a guarantee foundation for the operation of the flexible direct current converter valve power module.
Description
Technical Field
The invention belongs to the field of flexible direct current power transmission, and particularly relates to a redundant bypass circuit of a flexible direct current power module.
Background
The modular multilevel converter high-voltage direct-current transmission (modular multilevel converter based HVDC, MMC-HVDC) technology is a novel voltage source converter direct-current transmission technology, each bridge arm of an MMC converter valve is formed by connecting a plurality of submodules in series, each submodule is designed with a bypass protection function, a set of bypass switch equipment is configured, the bypass can be quickly isolated after a power module breaks down, the condition that the converter valve system trips and stops due to expansion of faults is avoided, the stability of a power transmission system is influenced, and a driving loop for closing of the bypass switch becomes very important. However, in the application of the bypass switch driving circuit, the problems of control signal interruption, no energy storage and power supply of the bypass coil and the like occur, so that the bypass switch cannot be effectively driven when the power module fails, and the serious problem of operation rejection occurs.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a redundant bypass circuit of a soft direct current power module, which is provided with redundancy in four aspects of a control signal of a bypass switch, bypass driving, energy storage and power supply and an excitation coil; the bypass switch of the power module can be switched on, meanwhile, the main bypass loop and the redundant bypass loop are mutually independent, the anti-interference capability is strong, the reliability of the bypass of the power module is improved, and an effective guarantee foundation is laid for the operation of the power module of the flexible direct current converter valve.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a gentle direct current power module 'S redundant bypass circuit, includes power module' S direct current electric capacity C, gets can power 1, bypass drive plate 2, bypass switch S, divider resistance, local module control panel 3, closes on module control panel 4, getting can power 1 'S input side and parallelly connected at direct current electric capacity C both ends, getting can power 1' S output side and connecting bypass drive plate 2, divider resistance connects in direct current electric capacity C both ends, plays direct current electric capacity C effect of discharging, and bypass drive plate 2 passes through light signal and local module control panel 3, closes on module control panel 4 communication.
The bypass driving board 2 comprises a first energy storage capacitor C1 connected in series with a first driving switch Q1, and a second energy storage capacitor C2 connected in series with a second driving switch Q2; the bypass switch S comprises a first excitation coil L1 and a second excitation coil L2, and the bypass switch can be switched on when any excitation coil is electrified; the voltage dividing resistor comprises a first resistor R1 and a second resistor R2;
the first energy storage capacitor C1 and the first driving switch Q1 of the bypass driving board 2 are connected with the first excitation coil L1 of the bypass switch S in series to form a main bypass loop; the second energy storage capacitor C2 and the second driving switch Q2 of the bypass driving board 2 are connected with the second excitation coil L2 of the bypass switch S in series to form a redundant bypass loop;
the bypass driving board 2 is connected with the local module control board 3 and the adjacent module control board 4 through optical fibers, so that the anti-electromagnetic interference capability of the control instruction is improved.
The output side of the energy taking power supply 1 is connected in parallel with two ends of a first energy storage capacitor C1 of the bypass driving plate 2 to supply power for the main bypass loop; the voltage dividing resistor comprises a first resistor R1 and a second resistor R2, the first resistor R1 and the second resistor R2 are connected in series and then connected in parallel at two ends of a direct current capacitor C, and the second resistor R2 is connected in parallel at two ends of a second energy storage capacitor C2 and supplies power for the redundancy bypass loop.
The soft direct power module comprises a half-bridge power module and a soft direct full-bridge power module.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a redundant bypass circuit of a flexible direct current power module, which is redundantly arranged in four aspects of a control signal of a bypass switch, bypass driving, energy storage and power supply and an excitation coil, and can ensure that the bypass switch of the power module is switched on after a bypass loop of any coil works. Under this power module control panel abnormal conditions, the bypass control signal is issued to the adjacent power module control panel of accessible, and main bypass return circuit and redundant bypass return circuit are independent each other, and the interference killing feature is strong, and very effectual the reliability that has improved the power module bypass establishes the guarantee basis for gentle straight converter valve power module's operation.
Drawings
Fig. 1 is a power module redundancy bypass schematic of the present invention.
Wherein, 1, an energy-taking power supply; 2. a bypass drive plate; 3. a local module control panel; 4. a proximity module control panel; s, a bypass switch; C. a direct current capacitor; c1, a first energy storage capacitor; c2 and a second energy storage capacitor; q1, a first drive switch; q2, a second drive switch; r1, a first resistor; r2, a second resistor; l1, a first excitation coil; l2, second excitation coil.
Detailed Description
The invention is explained in further detail below with reference to the drawings:
referring to fig. 1, a redundant bypass circuit of a flexible direct current power module includes a direct current capacitor C of the power module, an energy taking power supply 1, a bypass drive board 2, a bypass switch S, a divider resistor, a local module control board 3, and a module control board 4, wherein an input side of the energy taking power supply 1 is connected in parallel with two ends of the direct current capacitor C, an output side of the energy taking power supply 1 is connected with the bypass drive board 2, the divider resistor is connected with two ends of the direct current capacitor C to play a discharging role of the direct current capacitor C, and the bypass drive board 2 communicates with the local module control board 3 and the module control board 4 through optical signals.
The bypass driving board 2 comprises a first energy storage capacitor C1 connected in series with a first driving switch Q1, and a second energy storage capacitor C2 connected in series with a second driving switch Q2; the bypass switch S comprises a first excitation coil L1 and a second excitation coil L2, and the bypass switch can be switched on when any excitation coil is electrified; the voltage dividing resistor comprises a first resistor R1 and a second resistor R2;
the first energy storage capacitor C1 and the first driving switch Q1 of the bypass driving board 2 are connected with the first excitation coil L1 of the bypass switch S in series to form a main bypass loop; the second energy storage capacitor C2 and the second driving switch Q2 of the bypass driving board 2 are connected with the second excitation coil L2 of the bypass switch S in series to form a redundant bypass loop;
the bypass driving board 2 is connected with the local module control board 3 and the adjacent module control board 4 through optical fibers, so that the anti-electromagnetic interference capability of the control instruction is improved.
The output side of the energy taking power supply 1 is connected in parallel with two ends of a first energy storage capacitor C1 of the bypass driving plate 2 to supply power for the main bypass loop; the voltage dividing resistor comprises a first resistor R1 and a second resistor R2, the first resistor R1 and the second resistor R2 are connected in series and then connected in parallel at two ends of a direct current capacitor C, and the second resistor R2 is connected in parallel at two ends of a second energy storage capacitor C2 and supplies power for the redundancy bypass loop.
The soft direct power module comprises a half-bridge power module and a soft direct full-bridge power module.
The working principle of the invention is as follows:
in the flexible direct current power module, a first energy storage capacitor C1, a first driving switch Q1 and a first excitation coil L1 form a main bypass circuit, a second energy storage capacitor C2, a second driving switch Q2 and a second excitation coil L2 form a redundant bypass circuit, and the bypass switch can be switched on when any excitation coil in the main bypass circuit or the redundant bypass circuit is electrified; the first resistor R1 and the second resistor R2 in the voltage division resistor are connected in series and then connected with the direct current capacitor in parallel; the input end of the energy taking power supply 1 is connected in parallel with the two ends of the direct current capacitor C, and the output end supplies power to a first energy storage capacitor C1 of the main bypass circuit; the first resistor R1 and the second resistor R2 in the voltage dividing resistor are connected in series to supply power to the second energy storage capacitor C2 of the redundancy bypass circuit.
The embodiments described above are merely illustrative, and any other equivalent method that does not depart from the scope of the present invention is intended to be included therein.
Claims (6)
1. The utility model provides a gentle direct current power module 'S redundant bypass circuit, includes power module' S direct current electric capacity (C), gets can power supply (1), bypass drive board (2), bypass switch (S), divider resistance, local module control panel (3) and closes on module control panel (4), its characterized in that: the input side of the energy taking power supply (1) is connected in parallel to the two ends of the direct current capacitor (C), the output side of the energy taking power supply (1) is connected with the bypass drive board (2), the divider resistor is connected to the two ends of the direct current capacitor (C) to play a discharging role of the direct current capacitor (C), and the bypass drive board (2) is communicated with the local module control board (3) and the adjacent module control board (4) through optical signals.
2. The redundant bypass circuit of a limp dc power module of claim 1, wherein: the bypass driving board (2) comprises a first energy storage capacitor (C1) connected with a first driving switch (Q1) in series, and a second energy storage capacitor (C2) connected with a second driving switch (Q2) in series; the bypass switch (S) comprises a first excitation coil (L1) and a second excitation coil (L2), and the bypass switch can be switched on when any excitation coil is electrified; the voltage dividing resistor includes a first resistor (R1) and a second resistor (R2).
3. The redundant bypass circuit of a limp dc power module of claim 1, wherein: a first energy storage capacitor (C1) and a first driving switch (Q1) of the bypass driving board (2) are connected with a first excitation coil (L1) of the bypass switch (S) in series to form a main bypass loop; and a second energy storage capacitor (C2) and a second driving switch (Q2) of the bypass driving plate (2) are connected with a second excitation coil (L2) of the bypass switch (S) in series to form a redundant bypass loop.
4. The redundant bypass circuit of a limp dc power module of claim 1, wherein: and the bypass driving board (2) is connected with the local module control board (3) and the adjacent module control board (4) through optical fibers in communication.
5. The redundant bypass circuit of a limp dc power module of claim 1, wherein: the output side of the energy taking power supply (1) is connected in parallel with two ends of a first energy storage capacitor (C1) of the bypass driving plate (2) to supply power for the main bypass loop; the voltage division resistor comprises a first resistor (R1) and a second resistor (R2), the first resistor (R1) and the second resistor (R2) are connected in series and then connected in parallel at two ends of a direct current capacitor (C), and the second resistor (R2) is connected in parallel at two ends of a second energy storage capacitor (C2) and supplies power for the redundant bypass loop.
6. The redundant bypass circuit of a limp dc power module of claim 1, wherein: the soft direct power module comprises a half-bridge power module and a soft direct full-bridge power module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111556274.5A CN114243746A (en) | 2021-12-17 | 2021-12-17 | Redundancy bypass circuit of flexible direct current power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111556274.5A CN114243746A (en) | 2021-12-17 | 2021-12-17 | Redundancy bypass circuit of flexible direct current power module |
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| Publication Number | Publication Date |
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| CN114243746A true CN114243746A (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111556274.5A Pending CN114243746A (en) | 2021-12-17 | 2021-12-17 | Redundancy bypass circuit of flexible direct current power module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117318458A (en) * | 2023-08-09 | 2023-12-29 | 许继电气股份有限公司 | Bypass device and method for IGCT-MMC power module |
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