CN106253287B - AC/DC hybrid power supply system - Google Patents
AC/DC hybrid power supply system Download PDFInfo
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- CN106253287B CN106253287B CN201610683537.1A CN201610683537A CN106253287B CN 106253287 B CN106253287 B CN 106253287B CN 201610683537 A CN201610683537 A CN 201610683537A CN 106253287 B CN106253287 B CN 106253287B
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- 229910052799 carbon Inorganic materials 0.000 claims description 4
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- 238000001514 detection method Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 9
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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
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The present invention relates to the field of power supply circuits. The invention discloses an alternating current-direct current hybrid power supply system which comprises a plurality of power supply loops, wherein each power supply loop comprises a direct current power supply device and an inverter power supply circuit, the direct current power supply device comprises a switch power supply module, a storage battery module and a direct current boosting protection module, and the inverter power supply circuit comprises an inverter, a transformer and a first switch. The invention can replace the AC/DC/AC/DC multistage conversion mode of the traditional UPS, and has the advantages of simple system structure, high reliability and safety, high efficiency, simple maintenance and low operation cost.
Description
Technical Field
The invention belongs to the field of power supply circuits, and particularly relates to an alternating current-direct current hybrid power supply system.
Background
The power supply of process control instruments (such as DSC, ESD, on-line instruments, on-site solenoid valves and the like) of refining enterprises (such as petrochemical industry, metallurgy and the like) always adopts a UPS power supply mode, is an AC/DC/AC/DC multi-element conversion system, and consists of a rectifier, a storage battery, an inverter and other core units, and the main elements of the AC/DC/AC/DC multi-element conversion system are power electronic devices. The system has the advantages of complex structure, low reliability, high failure rate, low efficiency, high operation cost, troublesome maintenance and the like. In recent years, although the UPS type selection, the operation mode, the configuration of the meter power supply module, and the like are optimized, and the maintenance management work is enhanced, the occurrence of an accident of the meter power supply system still occurs, and the long-period operation of the production device is affected, so that the production efficiency is affected, the service life of the production device is shortened, and a large economic loss is caused.
Disclosure of Invention
The invention aims to solve the problems and provide an AC/DC/AC/DC multi-stage conversion mode capable of replacing the traditional UPS, which has the advantages of simple system structure, high reliability and safety, high efficiency, simple maintenance and low operation cost.
The invention discloses an alternating current-direct current hybrid power supply system, which comprises a plurality of power supply loops, wherein each power supply loop comprises a direct current power supply device and an inverter power supply circuit, each direct current power supply device comprises a switch power supply module, a storage battery module and a direct current boosting protection module, each inverter power supply circuit comprises an inverter, a transformer and a first switch, the input end of each switch power supply module is connected with an alternating current power supply, the output end of each switch power supply module is simultaneously connected with the input and output ends of the corresponding storage battery module and the input end of each direct current boosting protection module, the output end of each direct current boosting protection module is connected with the input end of each inverter, one end of each first switch is connected with the output end of each direct current boosting protection module, and the other end of each first switch is connected with an alternating current output end through a second switch.
Further, the storage battery module comprises two storage battery packs, wherein the input and output ends of the two storage battery packs are respectively connected with the output end of the switching power supply module, and are respectively connected with the input end of the direct current boost protection module.
Further, the storage battery module is a lead-carbon battery module.
Furthermore, the switching power supply module is formed by connecting three switching power supplies in parallel.
Further, the direct-current boosting protection module is formed by connecting two direct-current boosting protection sub-modules in parallel.
Still further, the direct current boost protection submodule comprises a full-bridge DC/DC conversion module, a smooth filtering module, an output protection module, an input protection module, an over-temperature protection module, a pulse width modulation module, a sampling feedback module, a current equalizing control module, a direct current protection module and a control module, wherein the input end of the full-bridge DC/DC conversion module is connected with the output end of a switching power supply module and the input end of a storage battery module, the output end of the full-bridge DC/DC conversion module is connected with the input end of an inverter through the smooth filtering module and the output protection module, the input protection module, the over-temperature protection module, the sampling feedback module and the direct current protection module are all connected with the pulse width modulation module and the control module, the input end of the input protection module is connected with the input end of the full-bridge DC/DC conversion module, the input end of the sampling feedback module is connected with the output end of the smooth filtering module, the current equalizing control module is connected with the sampling feedback module, and the pulse width modulation module is connected with the control module.
Further, the transformer is a high-impedance isolation transformer.
Further, the first switch is a miniature circuit breaker.
Further, the device also comprises a third switch, wherein one end of the third switch is connected with an alternating current power supply, and the other end of the third switch is connected with the second switch to form an alternating current power supply loop.
Further, the storage battery monitoring management module is used for carrying out online detection on the storage battery module.
The beneficial technical effects of the invention are as follows:
the invention can output redundant DC high-power (220V/24V/30-400 KW) and AC low-power (220V/3-10 kVA) power simultaneously. The direct current power supply is generally provided with loads such as DCS, ESD and the like, the alternating current power supply is generally provided with loads of an on-site on-line instrument and an electromagnetic valve, the AC/DC/AC/DC multistage conversion of the traditional UPS power supply system is simplified, the power supply efficiency is improved, a load side rectifying module can be omitted, and the investment is saved.
The direct current system adopts an active protection module, so that the safety and reliability can be greatly improved, and the alternating current system adopts a high-impedance isolation transformer, so that the problems of effective isolation of faults at the power supply side and the load side and voltage equalizing and shunting of parallel inverter power supplies can be realized. High reliability and safety, simple maintenance and low running cost.
Drawings
FIG. 1 is a schematic circuit diagram of an embodiment of the present invention;
fig. 2 is a block diagram of a dc boost protection sub-module in accordance with an embodiment of the present invention.
Detailed Description
The invention will now be further described with reference to the drawings and detailed description.
The utility model provides an alternating current-direct current hybrid power supply system, includes a plurality of power supply loops, the power supply loop all includes DC power supply unit and inverter circuit, DC power supply unit includes switching power supply module, battery module and DC boost protection module, inverter circuit includes dc-to-ac converter, transformer and first switch, switching power supply module's input termination alternating current power supply carries out rectification step-down processing to alternating current power supply, switching power supply module's output is connected with battery module's input and output and DC boost protection module's input simultaneously, DC boost protection module carries out the boost to the DC power supply who inputs from its input to carry out various abnormal state such as protection such as output short circuit, DC boost protection module's output termination the input of dc-to-ac converter, the output termination of dc-to-ac converter's input, the one end of first switch termination DC boost protection module's output, the other end is the DC output, the output of transformer of a plurality of power supply loops all connects the AC output through the second switch. The invention is described below by way of example with two supply circuits.
As shown in fig. 1, an ac/dc hybrid power supply system includes two power supply loops, namely a first power supply loop and a second power supply loop, where the first power supply loop includes a first dc power supply device and a first inverter power supply circuit, the first dc power supply device includes a first switching power supply module, a first battery module and a first dc boost protection module, the first inverter power supply circuit includes an inverter UI1, a transformer T1 and a switch MCB401, in this embodiment, the first switching power supply module is formed by connecting switching power supplies U1, U2 and U3 in parallel, the first battery module includes two battery packs BAT1 and BAT2, each battery pack has 9 batteries, the battery uses a lead-carbon battery, and has excellent high-current charge-discharge characteristics and working performance, and has a long service life, and greatly reduces battery maintenance and replacement costs, and the first dc boost protection module is formed by connecting two dc boost protection sub-modules RTM1 and RTM2 in parallel, where the transformer T1 is preferably a high-impedance isolation transformer, and can realize effective voltage-sharing and high voltage-sharing reliability of power supply side and load side fault isolation and parallel. The switch MCB401 is preferably a miniature circuit breaker, although other mechanical contact switches are possible in other embodiments.
The switching power supplies U1, U2 and U3 are respectively connected in series with the fuses FU1, FU2 and FU3 in parallel, the input ends (namely the input ends of the first switching power supply module) of the switching power supplies are connected with an alternating current power supply through the miniature circuit breaker MCB11 after being connected in parallel, for example, 380V alternating current or 220V alternating current, the output ends (namely the output ends of the first switching power supply module) of the switching power supplies are connected with the input ends of the direct current boosting protection sub-modules RTM1 and RTM2, the input and output ends of the storage battery pack BAT1 are sequentially connected with the input ends of the miniature circuit breaker MCB301 and the direct current boosting protection sub-modules RTM1 and the output ends of the first switching power supply module, the input and output ends of the storage battery pack BAT2 are sequentially connected with the input ends of the miniature circuit breaker MCB2 and the input ends of the miniature circuit breaker MCB302 in series with the direct current boosting protection sub-modules RTM1 and the output ends of the first switching power supply module 220, the input ends of the direct current boosting protection sub-modules RTM1 and the miniature circuit breaker MCB 7 are sequentially connected with the input ends of the miniature circuit breaker MCB1 and the miniature circuit breaker MCB 7 in series, the input ends of the miniature circuit breaker MCB1 and the miniature circuit breaker MCB 7 are sequentially connected with the output ends of the instrument MCB1 and the miniature circuit breaker controller 402, and the output ends of the miniature circuit breaker controller UI1 are sequentially connected with the output ends of the miniature circuit breaker MCB1 and the output ends of the miniature circuit breaker controller 402.
The second power supply loop comprises a second direct current power supply device and a second inverter power supply circuit, the second direct current power supply device comprises a second switch power supply module, a second storage battery module and a second direct current boost protection module, the second inverter power supply circuit comprises an inverter UI2, a transformer T2 and a switch MCB406, in the specific embodiment, the second switch power supply module is composed of switch power supplies U4, U5 and U6 in parallel connection, the second storage battery module comprises two storage battery packs BAT3 and BAT4, each battery pack is provided with 9 batteries, the batteries adopt lead carbon batteries, the battery has excellent high-current charge-discharge characteristics and working performance, the service life is long, the battery maintenance and replacement cost is greatly reduced, the second direct current boost protection module is composed of two direct current boost protection sub-modules RTM3 and RTM4 in parallel connection, the transformer T2 is preferably a high-impedance isolation transformer, the effective isolation of a power supply side fault and the voltage equalizing problem of the inverter power supply can be realized, and the reliability and safety are high. The switch MCB406 is preferably a miniature circuit breaker, although other mechanical contact switches are possible in other embodiments.
The switching power supplies U4, U5 and U6 are respectively connected in series with the fuses FU4, FU5 and FU6 in parallel, the input ends (namely the input ends of the second switching power supply module) of the switching power supplies are connected with an alternating current power supply through the miniature circuit breaker MCB12 after being connected in parallel, for example, 380V alternating current or 220V alternating current, the output ends (namely the output ends of the second switching power supply module) of the switching power supplies are connected with the input ends of the direct current boosting protection sub-modules RTM3 and RTM4, the input ends of the storage battery pack BAT3 are sequentially connected with the input ends of the miniature circuit breaker MCB303 to be connected with the direct current boosting protection sub-modules RTM3 and RTM4 in series, the input ends of the miniature circuit breaker MCB4 are connected with the output ends of the miniature circuit breaker MCB3 and the miniature circuit breaker MCB4 in series, the input ends of the storage battery pack BAT4 are sequentially connected with the input ends of the direct current boosting protection sub-module RTM3 and the miniature circuit breaker MCB4 through the miniature circuit breaker MCB304, the output ends of the direct current boosting protection sub-module RTM3 and the miniature circuit breaker MCU B4 are sequentially connected with the output ends of the miniature circuit breaker MCB2, and the output ends of the miniature circuit breaker FU2 is sequentially connected with the instrument 402 through the miniature circuit breaker UI2, and the output ends of the miniature circuit breaker controller 402 is sequentially connected with the output ends of the miniature circuit breaker 402.
In this embodiment, the DC boost protection sub-module includes a full-bridge DC/DC conversion module 11, a smoothing filter module 12, an output protection module 13, an input protection module 19, an over-temperature protection module 21, a pulse width modulation module 18, a sampling feedback module 14, a current equalizing control module 15, a DC protection module 16, a man-machine interaction interface 22 and a control module 17, where an input end of the full-bridge DC/DC conversion module 11 is connected with an output end of the switching power module and an input end of the storage battery module, an output end of the full-bridge DC/DC conversion module 11 is connected with an input end of the inverter through the smoothing filter module 12 and the output protection module 13, the input protection module 19, the over-temperature protection module 21, the sampling feedback module 14 and the DC protection module 16 are all connected with the pulse width modulation module 18 and the control module 17, an input end of the input protection module 13 is connected with an input end of the full-bridge DC/DC conversion module 11, an input end of the sampling feedback module 14 is connected with an output end of the smoothing filter module 12, the current equalizing control module 15 is connected with the sampling feedback module 14, the pulse width modulation module 18 is connected with the control module 17, and the man-machine interaction interface 22 is connected with the control module 17. The direct-current boosting protection submodule boosts the direct-current power supply output by the switch power supply module or the direct-current power supply output by the storage battery module, actively protects output short circuit, overcurrent, overtemperature, overvoltage and the like, and can allow the direct-current power supply to run in a single-point grounding mode; the input and the output are isolated, no matter which end fails, the other end and the connected equipment are not affected, the safe operation of the direct current power supply is not affected, and the reliability of the system is greatly improved. Of course, in other embodiments, the dc boost protection sub-module may be implemented using existing circuitry.
By providing the micro breaker MCB402, the micro breaker MCB407, the micro breaker MCB403, and the micro breaker MCB404, the system reliability and safety can be made higher.
Further, the circuit breaker further comprises a third switch MCB201, wherein the third switch MCB201 is preferably a miniature circuit breaker, one end of the miniature circuit breaker MCB201 is connected with an alternating current power supply through the miniature circuit breaker MCB12, and the other end of the miniature circuit breaker MCB405 is connected with an alternating current power supply circuit.
Further, the system also comprises a storage battery monitoring management module for carrying out online detection on the storage battery module. In this embodiment, the battery monitoring management module is a GC-DCXJ (battery patrol instrument), and the power supply performance of each battery is effectively predicted by analyzing the status of each unit through data processing software. The fault battery with severely deteriorated performance is found in time, the alarm is immediately given, the running state of the battery pack is mastered, and a measurement basis is provided for 'fine' maintenance of the battery pack. The normal and reliable operation of the system without faults is ensured, the testing labor intensity of maintenance personnel is reduced, and the working efficiency and the testing safety are improved.
The working process comprises the following steps:
a first power supply loop: the alternating current power supply is rectified and reduced by the switching power supplies U1, U2 and U3, then the 110V direct current power supply is output to charge the storage battery packs BAT1 and BAT2, meanwhile, the direct current voltage is boosted to 220V direct current power supply by the direct current voltage boosting protection sub-modules RTM1 and RTM2 to directly supply power to the direct current instrument, and meanwhile, the direct current power supply is output to the inverter UI1 to be converted into alternating current, and then the alternating current instrument is isolated and transformed by the transformer T1 to supply power to the alternating current instrument. When the alternating current power supply is powered off, the direct current power supplies output by the storage battery packs BAT1 and BAT2 are boosted into 220V direct current power supplies through the direct current boosting protection sub-modules RTM1 and RTM2 to directly supply power to the direct current instrument, and meanwhile, the direct current power supplies are output to the inverter UI1 to be converted into alternating current, and then the alternating current instrument is supplied with power after being isolated and transformed by the transformer T1. The operation of the second supply circuit can be referred to the first supply circuit, which is not described in detail. The ac power supply also directly powers the ac meter through the miniature circuit breaker MCB 201.
When one of the power supply loops is powered off or one of the power supply loops is overhauled, the other power supply loop can supply power, and when the alternating current power supply is powered off, the storage battery can supply power, so that uninterrupted power supply is realized, and the reliability is high.
Of course, in other embodiments, the number of power supply loops may be 3 or more, and increasing the number of power supply loops is easily implemented by those skilled in the art, which is not described in detail.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An ac/dc hybrid power supply system, characterized in that: the DC power supply device comprises a switch power supply module, a storage battery module and a DC boost protection module, wherein the DC boost protection module is formed by connecting two DC boost protection sub-modules in parallel, the DC boost protection sub-modules comprise a full-bridge DC/DC conversion module, a smoothing filter module, an output protection module, an input protection module, an over-temperature protection module, a pulse width modulation module, a sampling feedback module, a current sharing control module, a DC protection module and a control module, the input end of the full-bridge DC/DC conversion module is connected with the output end of the switch power supply module and the input end of the storage battery module, the output end of the full-bridge DC/DC conversion module is connected with the input end of an inverter through the smoothing filter module and the output protection module, the input end of the input protection module is connected with the input end of the full-bridge DC/DC conversion module, the input end of the sampling feedback module is connected with the output end of the smoothing filter module, the input end of the control module is connected with the input end of the inverter power supply module, the input end of the inverter power supply module is connected with the input end of the inverter power supply module, the output end of the inverter power supply module is connected with the input end of the inverter power supply module, one end of the first switch is connected with the output end of the direct current boosting protection module, the other end of the first switch is a direct current output end, and the output ends of the transformers of the power supply loops are connected with alternating current output ends through the second switch.
2. An ac/dc hybrid power supply system according to claim 1, characterized in that: the storage battery module comprises two storage battery packs, wherein the input and output ends of the two storage battery packs are respectively connected with the output end of the switch power supply module and are respectively connected with the input end of the direct current boost protection module.
3. An ac/dc hybrid power supply system according to claim 1 or 2, characterized in that: the storage battery module is a lead-carbon battery module.
4. An ac/dc hybrid power supply system according to claim 1, characterized in that: the switching power supply module is formed by connecting three switching power supplies in parallel.
5. An ac/dc hybrid power supply system according to claim 1, characterized in that: the transformer is a high impedance isolation transformer.
6. An ac/dc hybrid power supply system according to claim 1, characterized in that: the first switch is a miniature circuit breaker.
7. An ac/dc hybrid power supply system according to claim 1, characterized in that: the power supply circuit also comprises a third switch, wherein one end of the third switch is connected with an alternating current power supply, and the other end of the third switch is connected with a second switch to form an alternating current power supply loop.
8. An ac/dc hybrid power supply system according to claim 1, characterized in that: the system also comprises a storage battery monitoring management module which is used for carrying out online detection on the storage battery module.
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| CN201610683537.1A CN106253287B (en) | 2016-08-18 | 2016-08-18 | AC/DC hybrid power supply system |
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| CN201610683537.1A CN106253287B (en) | 2016-08-18 | 2016-08-18 | AC/DC hybrid power supply system |
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| CN106253287B true CN106253287B (en) | 2023-11-14 |
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| CN107276125B (en) * | 2017-07-06 | 2023-06-27 | 南京南瑞继保电气有限公司 | Chained multi-port grid-connected interface device and control method |
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| CN102214945A (en) * | 2010-12-21 | 2011-10-12 | 深圳市泰昂能源科技股份有限公司 | Direct current power system based on paralleling connection of storage batteries |
| CN103401466A (en) * | 2013-06-24 | 2013-11-20 | 华为技术有限公司 | Inversion power supply system |
| WO2016015330A1 (en) * | 2014-08-01 | 2016-02-04 | 冷再兴 | Fly-back dc/ac conversion circuit with plurality of windings |
| CN205986157U (en) * | 2016-08-18 | 2017-02-22 | 厦门盈盛捷电力科技有限公司 | Hybrid AC/DC power supply system |
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2016
- 2016-08-18 CN CN201610683537.1A patent/CN106253287B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214945A (en) * | 2010-12-21 | 2011-10-12 | 深圳市泰昂能源科技股份有限公司 | Direct current power system based on paralleling connection of storage batteries |
| CN103401466A (en) * | 2013-06-24 | 2013-11-20 | 华为技术有限公司 | Inversion power supply system |
| WO2016015330A1 (en) * | 2014-08-01 | 2016-02-04 | 冷再兴 | Fly-back dc/ac conversion circuit with plurality of windings |
| CN205986157U (en) * | 2016-08-18 | 2017-02-22 | 厦门盈盛捷电力科技有限公司 | Hybrid AC/DC power supply system |
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