CN110880807A - Two-section direct current power supply bus bar voltage reduction silicon chain open circuit protection system - Google Patents
Two-section direct current power supply bus bar voltage reduction silicon chain open circuit protection system Download PDFInfo
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- CN110880807A CN110880807A CN201911167400.0A CN201911167400A CN110880807A CN 110880807 A CN110880807 A CN 110880807A CN 201911167400 A CN201911167400 A CN 201911167400A CN 110880807 A CN110880807 A CN 110880807A
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/305—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a thyratron or thyristor type requiring extinguishing means
- H02M3/315—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a two-section direct-current power supply bus with a buck silicon link open-circuit protection system, which comprises a first section direct-current power supply bus, a second section direct-current power supply bus and a buck silicon link open-circuit protection bidirectional DC/DC device, wherein the buck silicon link open-circuit protection bidirectional DC/DC device comprises a monitoring unit, a bidirectional direct-current converter and a control unit, the output end of the monitoring unit is electrically connected with the input end of the control unit, the output end of the control unit is electrically connected with the bidirectional direct-current converter, and the bidirectional direct-current converter is bridged between the first section direct-current power supply bus and the second section direct-current power supply bus. The bidirectional direct current converter is novel in structure and ingenious in conception, and when the voltage reduction silicon chain open circuit of a certain section of direct current bus causes abnormal power supply of the control bus, the bidirectional direct current converter is immediately started and supplies power to the fault section bus, so that the continuity of power supply of the direct current bus is guaranteed, and the purpose of mutual backup automatic switching uninterrupted power supply of two sections of direct current power buses is achieved.
Description
Technical Field
The invention relates to the technical field of direct-current power supply systems, in particular to a novel two-section direct-current power supply bus-bar voltage-reduction silicon chain open-circuit protection system.
Background
In order to ensure the safe operation of the power system, the control and protection equipment of the power plant and the transformer substation adopts a direct-current power supply to supply power. At present, in a direct-current power supply system with double charging, double electricity and double buses, two segments of direct-current power supply buses realize mutual backup through a manual bus-tie switch. When the voltage reduction silicon chain is open-circuited, the direct current power supply bus of the section loses power, so that various control and protection devices fail, the fault range of a transformer substation is enlarged, and the system architecture cannot meet the requirement of safe power supply of a direct current power supply system.
At present, the open circuit protection of the buck silicon chain is generally realized by connecting an open circuit protection element (such as an auxiliary buck silicon chain, a diode, a fast relay and the like) in parallel with the main buck silicon chain, and the protection means is limited. Therefore, it is necessary to design a novel two-section dc power supply bus with voltage-reducing silicon chain open-circuit protection system.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the two-section direct-current power supply bus open-circuit protection system with the voltage-reducing silicon chain, which can safely and reliably solve the problem of voltage loss of the control bus caused by open-circuit faults of the voltage-reducing silicon chain and other reasons, and improve the operation reliability of the direct-current power supply system of the transformer substation.
In order to achieve the purpose, the invention provides the following technical scheme: a novel two-section direct-current power supply bus with voltage reduction silicon link open-circuit protection system comprises a first section direct-current power supply bus, a second section direct-current power supply bus and a voltage reduction silicon link open-circuit protection bidirectional DC/DC device, wherein the voltage reduction silicon link open-circuit protection bidirectional DC/DC device comprises a monitoring unit, a bidirectional direct-current converter and a control unit, the first section direct-current power supply bus and the second section direct-current power supply bus are electrically connected with the input end of the monitoring unit, the output end of the monitoring unit is electrically connected with the input end of the control unit, and the output end of the control unit is electrically connected with the bidirectional direct-current converter;
the bidirectional direct current converter is bridged between the first section of direct current power bus and the second section of direct current power bus;
the bidirectional direct current exchanger is used for immediately starting and supplying power to the first section direct current power supply bus or the second section direct current power supply bus of the fault section when the power supply of the first section direct current power supply bus or the second section direct current power supply bus is abnormal;
and the monitoring unit is used for monitoring the voltage change conditions of the first section of direct-current power supply bus and the second section of direct-current power supply bus.
According to the technical scheme, the monitoring unit comprises a voltage division circuit, a voltage acquisition module, a voltage processing module and a data transmission module;
the voltage division circuit is used for dividing the output voltages of the first section of direct-current power supply bus and the second section of direct-current power supply bus according to a set proportion to form a monitoring voltage and outputting the monitoring voltage to the voltage acquisition module;
the voltage acquisition module is used for sampling the monitoring voltages output by the first section of direct-current power supply bus and the second section of direct-current power supply bus to obtain a digitized monitoring voltage and serially outputting the digitized monitoring voltage to the voltage acquisition module;
and the voltage processing module is used for processing the voltage acquired by the voltage acquisition module and transmitting the voltage value to the control unit through the data transmission module.
According to the technical scheme, the voltage acquisition module is connected with the voltage processing module by adopting the voltage follower.
According to the technical scheme, the data sending module adopts a wireless sending module.
According to the technical scheme, the data sending module works in a response mode and can automatically retransmit, and the data sending frequency of the data sending module is 2.4 GHz.
According to the technical scheme, the control unit comprises a central processing module and an MVB interface module, and the central processing module is in communication connection with the MVB interface module.
According to the technical scheme, the MVB interface module is used for packaging the information output by the central processing module into a data stream specified by an MVB protocol and outputting the data stream to the MVB bus transceiver; and the MVB protocol controller analyzes the data output by the MVB bus transceiver into data identified by the central processing module and outputs the data to the central processing module.
According to the technical scheme, the voltage reduction silicon chain open-circuit protection bidirectional DC/DC device further comprises a first storage battery pack and a second storage battery pack, wherein the first storage battery pack is electrically connected with the first section of direct-current power supply bus, and the second storage battery pack is electrically connected with the second section of direct-current power supply bus.
According to the technical scheme, the first storage battery pack and the second storage battery pack are respectively connected with the first charger and the second charger, and the input voltages of the first charger and the second charger are both alternating current 380V.
According to the technical scheme, the nominal voltage of the switching-on bus + HM in the first section of direct-current power bus and the second section of direct-current power bus is DC242V or DC121V, and the nominal voltage of the control bus + KM in the first section of direct-current power bus and the second section of direct-current power bus is DC220V or DC 110V.
The invention has the beneficial effects that:
the + HM nominal voltage of a closing bus in the first section of direct current power supply bus and the second section of direct current power supply bus is DC242V or DC121V, the + KM nominal voltage of a control bus in the first section of direct current power supply bus and the second section of direct current power supply bus is DC220V or DC110V, a monitoring unit in the voltage reduction silicon link open-circuit protection bidirectional DC/DC device can set the output voltage and the starting voltage of a bidirectional direct current converter, when the control bus is in a normal power supply state, the bidirectional direct current converter is in a standby state of hot backup, when the control bus is in an abnormal power supply state and the bus voltage is lower than a set starting voltage value, under the control of the monitoring unit, the bidirectional direct current converter is immediately started, the bidirectional direct current converter absorbs electric energy from the normally supplied closing direct current bus section and outputs the electric energy to the abnormally supplied control direct current bus section after isolation and voltage stabilization, the purpose of voltage reduction silicon link open-circuit protection is achieved, and when the abnormally supplied control direct current, the voltage-reducing silicon chain open-circuit protection bidirectional DC/DC device automatically returns to a hot backup standby state, when a certain direct current bus voltage-reducing silicon chain open circuit causes abnormal power supply of a control bus, the bidirectional DC converter immediately starts and supplies power to a fault section bus, so that the power supply continuity of the direct current bus is guaranteed, the purpose of mutual backup automatic switching uninterrupted power supply of the two sections of direct current power buses is achieved, in a direct current power system, the voltage-reducing silicon chain open-circuit protection bidirectional DC/DC device can safely and reliably solve the problem of voltage loss of the control bus caused by the voltage-reducing silicon chain open circuit fault and other reasons, and the operation reliability of the direct current power system of the transformer substation is.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall plan structure of the present invention;
FIG. 2 is a schematic plane structure diagram of a step-down silicon link open-circuit protection bidirectional DC/DC device according to the present invention;
FIG. 3 is a schematic plan view of a monitoring unit according to the present invention;
fig. 4 is a schematic plan view of a control unit according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings 1 to 4.
As shown in fig. 1 to 4, the present invention provides the following technical solutions: a novel two-section direct-current power supply bus with voltage reduction silicon link open-circuit protection system comprises a first section direct-current power supply bus, a second section direct-current power supply bus and a voltage reduction silicon link open-circuit protection bidirectional DC/DC device, wherein the voltage reduction silicon link open-circuit protection bidirectional DC/DC device comprises a monitoring unit, a bidirectional direct-current converter and a control unit;
the bidirectional direct current converter is bridged between the first section of direct current power supply bus and the second section of direct current power supply bus;
the bidirectional direct current exchanger is used for immediately starting and supplying power to the first section direct current power supply bus or the second section direct current power supply bus of the fault section when the power supply of the first section direct current power supply bus or the second section direct current power supply bus is abnormal;
and the monitoring unit is used for monitoring the voltage change conditions of the first section of direct-current power supply bus and the second section of direct-current power supply bus.
According to the technical scheme, the monitoring unit comprises a voltage division circuit, a voltage acquisition module, a voltage processing module and a data transmission module;
the voltage division circuit is used for dividing the output voltage of the first section of direct-current power supply bus and the second section of direct-current power supply bus according to a set proportion to form a monitoring voltage and outputting the monitoring voltage to the voltage acquisition module;
the voltage acquisition module is used for sampling the monitoring voltages output by the first section of direct-current power supply bus and the second section of direct-current power supply bus to obtain a digitized monitoring voltage and serially outputting the digitized monitoring voltage to the voltage acquisition module;
and the voltage processing module is used for processing the voltage acquired by the voltage acquisition module and transmitting the voltage value to the control unit through the data transmission module.
According to the technical scheme, the voltage acquisition module is connected with the voltage processing module by adopting the voltage follower.
According to the technical scheme, the data sending module adopts a wireless sending module.
According to the technical scheme, the data sending module works in a response mode and can automatically retransmit, and the data sending frequency of the data sending module is 2.4 GHz.
According to the technical scheme, the control unit comprises a central processing module and an MVB interface module, and the central processing module is in communication connection with the MVB interface module.
According to the technical scheme, the MVB interface module is used for packaging the information output by the central processing module into a data stream specified by an MVB protocol and outputting the data stream to the MVB bus transceiver; and the MVB protocol controller analyzes the data output by the MVB bus transceiver into data recognized by the central processing module and outputs the data to the central processing module.
According to the technical scheme, the voltage reduction silicon link open-circuit protection bidirectional DC/DC device further comprises a first storage battery pack and a second storage battery pack, wherein the first storage battery pack is electrically connected with the first section of direct-current power supply bus, and the second storage battery pack is electrically connected with the second section of direct-current power supply bus.
According to the technical scheme, the first storage battery pack and the second storage battery pack are respectively connected with the first charger and the second charger, and the input voltages of the first charger and the second charger are both alternating current 380V.
According to the technical scheme, the nominal voltage of the switching-on bus + HM in the first section of direct-current power bus and the second section of direct-current power bus is DC242V or DC121V, and the nominal voltage of the control bus + KM in the first section of direct-current power bus and the second section of direct-current power bus is DC220V or DC 110V.
The invention has the advantages that the nominal voltage of the switching-on bus + HM in the first section of direct current power supply bus and the second section of direct current power supply bus is DC242V or DC121V, the nominal voltage of the control bus + KM in the first section of direct current power supply bus and the second section of direct current power supply bus is DC220V or DC110V, the monitoring unit in the voltage reduction silicon chain open circuit protection bidirectional DC/DC device can set the output voltage and the starting voltage of the bidirectional DC converter, when the control bus is in normal power supply, the bidirectional DC converter is in the standby state of hot backup, when the control bus is in abnormal power supply and the bus voltage is lower than the set starting voltage value, under the control of the monitoring unit, the bidirectional DC converter starts immediately, the bidirectional DC converter absorbs electric energy from the switching-on direct current bus section in normal power supply, and outputs the electric energy to the control direct current bus section in abnormal power supply after isolation and voltage stabilization, thereby achieving the purpose of voltage, when the control direct current bus section with abnormal power supply recovers normal power supply, the voltage reduction silicon chain open circuit protection bidirectional DC/DC device automatically returns to a hot backup standby state, when the voltage reduction silicon chain open circuit of a certain section of direct current bus causes abnormal power supply of the control bus, the bidirectional direct current converter immediately starts and supplies power to the fault section bus, so that the continuity of the power supply of the direct current bus is ensured, and the purpose of mutually standby automatic switching uninterrupted power supply of the two sections of direct current power buses is achieved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A two-section direct-current power supply bus with a voltage-reducing silicon link open-circuit protection system comprises a first section direct-current power supply bus, a second section direct-current power supply bus and a voltage-reducing silicon link open-circuit protection bidirectional DC/DC device, and is characterized in that the voltage-reducing silicon link open-circuit protection bidirectional DC/DC device comprises a monitoring unit, a bidirectional direct-current converter and a control unit, wherein the first section direct-current power supply bus and the second section direct-current power supply bus are electrically connected with the input end of the monitoring unit, the output end of the monitoring unit is electrically connected with the input end of the control unit, and the output end of the control unit is electrically connected with the bidirectional direct-current converter;
the bidirectional direct current converter is bridged between the first section of direct current power bus and the second section of direct current power bus;
the bidirectional direct current exchanger is used for immediately starting and supplying power to the first section direct current power supply bus or the second section direct current power supply bus of the fault section when the power supply of the first section direct current power supply bus or the second section direct current power supply bus is abnormal;
and the monitoring unit is used for monitoring the voltage change conditions of the first section of direct-current power supply bus and the second section of direct-current power supply bus.
2. The two-section direct-current power supply bus bar voltage reduction silicon chain open circuit protection system according to claim 1, wherein the monitoring unit comprises a voltage division circuit, a voltage acquisition module, a voltage processing module and a data transmission module;
the voltage division circuit is used for dividing the output voltages of the first section of direct-current power supply bus and the second section of direct-current power supply bus according to a set proportion to form a monitoring voltage and outputting the monitoring voltage to the voltage acquisition module;
the voltage acquisition module is used for sampling the monitoring voltages output by the first section of direct-current power supply bus and the second section of direct-current power supply bus to obtain a digitized monitoring voltage and serially outputting the digitized monitoring voltage to the voltage processing module;
and the voltage processing module is used for processing the voltage acquired by the voltage acquisition module and transmitting the voltage value to the control unit through the data transmission module.
3. The two-section direct-current power supply bus bar voltage reduction silicon chain open circuit protection system according to claim 2, wherein the voltage acquisition module is connected with the voltage processing module by adopting a voltage follower.
4. The two-section direct-current power supply bus bar voltage reduction silicon link open circuit protection system according to claim 2, wherein the data transmission module adopts a wireless transmission module.
5. The two-segment DC power bus bar voltage reduction silicon link open circuit protection system according to claim 4, wherein the data transmission module operates in a response mode and is capable of automatic retransmission, and the data transmission frequency of the data transmission module is 2.4 GHz.
6. The two-segment direct-current power supply bus bar voltage reduction silicon chain open circuit protection system according to claim 1, wherein the control unit comprises a central processing module and an MVB interface module, and the central processing module is in communication connection with the MVB interface module.
7. The two-segment direct-current power supply bus bar voltage reduction silicon chain open circuit protection system according to claim 6, wherein the MVB interface module is used for packaging information output by the central processing module into a data stream specified by an MVB protocol and outputting the data stream to the MVB bus transceiver; and the MVB protocol controller analyzes the data output by the MVB bus transceiver into data identified by the central processing module and outputs the data to the central processing module.
8. The two-section direct-current power supply bus bar with the voltage reduction silicon chain open-circuit protection system as claimed in claim 1, wherein the voltage reduction silicon chain open-circuit protection bidirectional DC/DC device further comprises a first storage battery pack and a second storage battery pack, the first storage battery pack is electrically connected with the first section of direct-current power supply bus bar, and the second storage battery pack is electrically connected with the second section of direct-current power supply bus bar.
9. The two-section direct current power supply bus bar voltage reduction silicon chain open circuit protection system according to claim 8, wherein the first storage battery pack and the second storage battery pack are respectively connected with a first charger and a second charger, and input voltages of the first charger and the second charger are both alternating current 380V.
10. The two-stage direct-current power supply bus with voltage reduction silicon link open circuit protection system as claimed in claim 1, wherein the nominal voltage of the closing bus + HM in the first and second direct-current power supply buses is DC242V or DC121V, and the nominal voltage of the control bus + KM in the first and second direct-current power supply buses is DC220V or DC 110V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911167400.0A CN110880807A (en) | 2019-11-25 | 2019-11-25 | Two-section direct current power supply bus bar voltage reduction silicon chain open circuit protection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911167400.0A CN110880807A (en) | 2019-11-25 | 2019-11-25 | Two-section direct current power supply bus bar voltage reduction silicon chain open circuit protection system |
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| CN110880807A true CN110880807A (en) | 2020-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911167400.0A Pending CN110880807A (en) | 2019-11-25 | 2019-11-25 | Two-section direct current power supply bus bar voltage reduction silicon chain open circuit protection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865030A (en) * | 2021-01-08 | 2021-05-28 | 国网江苏省电力有限公司泰州供电分公司 | Silicon chain open circuit protection device |
| CN117578887A (en) * | 2024-01-16 | 2024-02-20 | 深圳市云天数字能源有限公司 | Driving power circuit and related device |
-
2019
- 2019-11-25 CN CN201911167400.0A patent/CN110880807A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865030A (en) * | 2021-01-08 | 2021-05-28 | 国网江苏省电力有限公司泰州供电分公司 | Silicon chain open circuit protection device |
| CN112865030B (en) * | 2021-01-08 | 2022-07-08 | 国网江苏省电力有限公司泰州供电分公司 | Silicon chain open circuit protection device |
| CN117578887A (en) * | 2024-01-16 | 2024-02-20 | 深圳市云天数字能源有限公司 | Driving power circuit and related device |
| CN117578887B (en) * | 2024-01-16 | 2024-05-17 | 深圳市云天数字能源有限公司 | Driving power circuit and related device |
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