CN113270889A - Factory direct-current storage battery discharging utilization system and method - Google Patents
Factory direct-current storage battery discharging utilization system and method Download PDFInfo
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- CN113270889A CN113270889A CN202110564417.0A CN202110564417A CN113270889A CN 113270889 A CN113270889 A CN 113270889A CN 202110564417 A CN202110564417 A CN 202110564417A CN 113270889 A CN113270889 A CN 113270889A
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- 238000007599 discharging Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 21
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 230000006641 stabilisation Effects 0.000 claims abstract description 6
- 238000011105 stabilization Methods 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a factory direct current storage battery discharging utilization system, which comprises a bus; the power supply assembly is connected with the bus and comprises a positive grid-connected switch, a negative grid-connected switch and a storage battery pack, wherein the positive grid-connected switch and the negative grid-connected switch are connected with the bus; the current conversion assembly is connected with the power supply assembly and comprises a positive electrode switch, a negative electrode switch and a DC/DC current conversion device, wherein the positive electrode switch and the negative electrode switch are connected with the power supply assembly; the invention can realize discharge utilization during discharge test of the factory direct-current storage battery and avoid electric energy waste. When the factory direct-current storage battery is subjected to discharge test, a specially-assigned person is not needed, the system automatically operates, and the safety is high. The DC/DC converter unit can bear instant power impact, and can realize direct current voltage stabilization control. The factory direct-current storage battery discharge utilization system is simple in structure, does not need to be transformed, and is high in feasibility.
Description
Technical Field
The invention relates to the technical field of electric energy utilization, in particular to a system and a method for discharging and utilizing a factory-used direct-current storage battery.
Background
In power plant dc systems, batteries play an important role. When the 400V low-voltage alternating-current station service system loses power, the direct-current charging device fails, all direct-current power and control loads are supplied with power by the storage battery, and the power and control loads comprise: direct current motor, electromagnetic mechanism, protection device, control, communication, accident light.
Although the direct-current storage battery belongs to a standby power supply of a direct-current system and is in a floating charging state at ordinary times, the storage battery is the only power supply point of the direct-current system in an accident state. In order to test the performance of the direct-current storage battery, a discharge test needs to be carried out on the direct-current storage battery at regular time, and at present, a resistance discharge device is widely adopted to discharge at a rate of 10C, so that the waste of electric energy is caused, the resistance discharge device is also caused to generate heat, a specially-assigned person is required to watch, the workload is increased, and potential safety hazards are caused.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The invention is provided in view of the problems of the existing factory direct current storage battery discharging utilization system and method.
Therefore, the invention aims to provide a system and a method for utilizing the discharge of a factory-used direct-current storage battery, and provides the system and the method for utilizing the discharge of the factory-used direct-current storage battery by adopting a DC/DC converter device, so that the waste of electric energy in a discharge test of the direct-current storage battery is avoided.
In order to solve the technical problems, the invention provides the following technical scheme: a factory direct current storage battery discharging and utilizing system comprises a bus; the power supply assembly is connected with the bus and comprises a positive grid-connected switch, a negative grid-connected switch and a storage battery pack, wherein the positive grid-connected switch and the negative grid-connected switch are connected with the bus; and the commutation component is connected with the power supply component and comprises a positive electrode switch, a negative electrode switch and a DC/DC commutation device, wherein the positive electrode switch and the negative electrode switch are connected with the power supply component, and the DC/DC commutation device is connected with the positive electrode switch and the negative electrode switch.
As a preferred scheme of the factory direct current storage battery discharging utilization system and method of the present invention, wherein: the bus is a 220V direct current bus and comprises a positive electrode and a negative electrode.
As a preferred scheme of the factory direct current storage battery discharging utilization system and method of the present invention, wherein: the positive grid-connected switch is connected with a positive electrode, and the positive electrode of the storage battery pack is connected with the direct current positive electrode on the bus through the positive grid-connected switch.
As a preferred scheme of the factory direct current storage battery discharging utilization system and method of the present invention, wherein: the negative grid-connected switch is connected with a negative electrode, and the negative electrode of the storage battery pack is connected with the direct current negative electrode on the bus through the negative grid-connected switch.
As a preferred scheme of the factory direct current storage battery discharging utilization system and method of the present invention, wherein: the DC/DC converter device adopts a DC/AC inverter.
As a preferred scheme of the factory direct current storage battery discharging utilization system and method of the present invention, wherein: and the direct-current side positive electrode of the DC/DC convertor device is connected with the positive electrode of the storage battery pack through the positive electrode switch of the station direct-current storage battery energy recovery system.
As a preferred scheme of the factory direct current storage battery discharging utilization system and method of the present invention, wherein: and the DC side negative electrode of the DC/DC convertor device is connected with the negative electrode of the storage battery pack through the negative electrode switch of the station direct current storage battery energy recovery system.
As a preferred scheme of the factory direct current storage battery discharging utilization system and method of the present invention, wherein: and the output positive electrode of the DC/DC convertor device is connected with the direct current positive electrode on the bus, and the output negative electrode of the DC/DC convertor device is connected with the direct current negative electrode on the bus.
As a preferred scheme of the factory direct current storage battery discharging utilization system and method of the present invention, wherein: when the storage battery pack is subjected to a discharge test, firstly, a positive grid-connected switch of the storage battery pack and a negative grid-connected switch of the storage battery pack are disconnected, and then the positive switch of the plant direct-current storage battery energy recovery system and the negative switch of the plant direct-current storage battery energy recovery system are closed.
As a preferred scheme of the factory direct current storage battery discharging utilization system and method of the present invention, wherein: the DC/DC converter device returns the 220V direct current to the 220V direct current bus to complete electric energy recovery; the DC/DC converter device can bear instant power impact, can realize direct current voltage stabilization control, and is conveyed to 220V station direct current buses, so that the quality of the generated electric energy is high.
The invention has the beneficial effects that:
the invention can realize discharge utilization during discharge test of the factory direct-current storage battery and avoid electric energy waste. When the factory direct-current storage battery is subjected to discharge test, a specially-assigned person is not needed, the system automatically operates, and the safety is high. The DC/DC converter unit can bear instant power impact, and can realize direct current voltage stabilization control. The factory direct-current storage battery discharge utilization system is simple in structure, does not need to be transformed, and is high in feasibility.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic diagram of the overall structure of the factory-used dc battery discharging utilization system and method of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Example 1
Referring to fig. 1, for the first embodiment of the present invention, a factory dc storage battery discharging and utilizing system and method are provided, the system includes a bus 100, a power supply module 200 and a converter module 300; the power supply assembly 200 is connected with the bus 100 and comprises a positive grid-connected switch 201, a negative grid-connected switch 202 and a storage battery pack 203, wherein the positive grid-connected switch 201 and the negative grid-connected switch 202 are connected with the bus 100; and a commutation module 300 connected to the power module 200, and including a positive switch 301 and a negative switch 302 connected to the power module 200, and a DC/DC commutation device 303 connected to the positive switch 301 and the negative switch 302.
The bus 100 is a station-service direct current 220V bus, the power supply assembly 200 performs a discharge test from the bus 100 and receives power from the bus 100, and the converter assembly 300 sends the 220V direct current back to the direct current bus 100 to achieve the effect of recovering electric energy.
The positive grid-connected switch 201 controls a circuit between a positive electrode 101 and a storage battery pack 203 in the bus 100, the negative grid-connected switch 202 controls a circuit between a negative electrode 102 and the storage battery pack 203 in the bus 100, the storage battery pack 203 is used for transferring electric energy and can form a loop with the bus 100 or the commutation component 300 respectively, and the storage battery pack 203 is an intersection between the bus 100 and the storage battery pack 203 and between the storage battery pack 203 and the commutation component 300 and stores electric energy or transfers electric energy. The positive switch 301 controls a circuit between the output positive pole of the DC/DC converter device 303 and the storage battery pack 203, the negative switch 302 controls a circuit between the output negative pole of the DC/DC converter device 303 and the output negative pole of the storage battery pack 203, and the DC/DC converter device 303 can transmit electric energy for electric energy recovery.
Example 2
Referring to fig. 1, a second embodiment of the present invention, which is different from the first embodiment, is: bus 100 is a 220V dc bus comprising a positive pole 101 and a negative pole 102. The positive grid-connected switch 201 is connected with a positive electrode 101, and the positive electrode of the storage battery pack 203 is connected with the direct current positive electrode 101 on the bus 100 through the positive grid-connected switch 201. The negative grid-connected switch 202 is connected with a negative electrode 102, and the negative electrode of the storage battery pack 203 is connected with the direct current negative electrode 102 on the bus 100 through the negative grid-connected switch 202.
The DC/DC converter 303 employs a DC/AC inverter. The direct-current side positive electrode of the DC/DC converter device 303 is connected with the positive electrode of the storage battery pack 203 through the positive electrode switch 301 of the station direct-current storage battery energy recovery system. The negative electrode of the DC side of the DC/DC converter device 303 is connected with the negative electrode of the storage battery pack 203 through the negative electrode switch 302 of the station DC storage battery energy recovery system. The output positive electrode of the DC/DC converter device 303 is connected to the direct current positive electrode 101 on the bus 100, and the output negative electrode of the DC/DC converter device 303 is connected to the direct current negative electrode 102 on the bus 100.
When the storage battery pack 203 performs a discharge test, firstly, the positive grid-connected switch 201 of the storage battery pack 203 and the negative grid-connected switch 202 of the storage battery pack 203 are disconnected, and then the positive switch 301 of the plant-used direct-current storage battery energy recovery system and the negative switch 302 of the plant-used direct-current storage battery energy recovery system are closed. The DC/DC converter device 303 returns the 220V direct current to the 220V direct current bus 100 to complete electric energy recovery; the DC/DC converter device 303 can bear instant power impact, can realize direct current voltage stabilization control, and can transmit the direct current to the 220V station direct current bus 100, so that the quality of the generated electric energy is high.
Further, compared to embodiment 1, the service dc battery power supply module 200 includes: the positive pole of the storage battery pack 203 is connected with the positive pole 101 of the 220V direct current system through a positive pole grid-connected switch 201 of the storage battery pack 203, and the negative pole of the storage battery pack 203 is connected with the negative pole 102 of the 220V direct current system through a negative pole grid-connected switch 202 of the storage battery pack 203. The positive electrode of the direct current side of the DC/DC converter device 303 is connected with the positive electrode of the storage battery pack 203 through the positive electrode switch 201 of the plant direct current storage battery energy recovery system, and the negative electrode of the direct current side of the DC/DC converter device 303 is connected with the negative electrode of the storage battery pack 203 through the negative electrode switch 202 of the plant direct current storage battery energy recovery system.
The commutation module 300 includes: a DC/DC converter 303; a positive switch 301 of the plant direct-current storage battery energy recovery system; a negative switch 302 of the plant dc battery energy recovery system. The DC side anode of the DC/DC converter device 303 is connected with the anode of the storage battery pack 203 through a plant DC storage battery energy recovery system anode switch 301, and the DC side cathode of the DC/AC inverter is connected with the cathode of the storage battery pack 203 through a plant DC storage battery energy recovery system cathode switch 302.
The 220V direct current bus anode 101, the 220V direct current system cathode 102, the 220V direct current bus anode 101 are connected with the output anode of the DC/DC converter device 303, the 220V direct current bus cathode 102 is connected with the output cathode of the DC/DC converter device 303, and the components are connected to form a power frequency voltage transformation phase-locked unit loop.
The positive pole of the storage battery pack 203 is connected with the positive pole 101 of the 220V direct current system through a positive pole grid-connected switch 201 of the storage battery pack 203, and the negative pole of the storage battery pack 203 is connected with the negative pole 102 of the 220V direct current system through a negative pole grid-connected switch 202 of the storage battery pack 203. The positive electrode of the direct current side of the DC/DC converter device 303 is connected with the positive electrode of the storage battery pack 203 through the positive electrode switch 201 of the plant direct current storage battery energy recovery system, and the negative electrode of the direct current side of the DC/DC converter device 303 is connected with the negative electrode of the storage battery pack 203 through the negative electrode switch 202 of the plant direct current storage battery energy recovery system.
When the storage battery pack 203 performs a discharge test, the positive grid-connected switch 201 of the storage battery pack 203 and the negative grid-connected switch 202 of the storage battery pack 203 are disconnected, and then the positive switch 301 of the energy recovery system of the factory-used direct-current storage battery and the negative switch 302 of the energy recovery system of the factory-used direct-current storage battery are closed. The output positive pole of the DC/DC converter device 303 is connected with the positive pole 101 of the 220V direct current system, the output negative pole of the DC/DC converter device 303 is connected with the negative pole 102 of the 220V direct current system, the 220V direct current is sent back to the 220V factory direct current bus 100 by the power frequency voltage transformation phase-locked unit loop to complete electric energy recovery, the DC/DC converter device 303 can bear instant power impact, direct current voltage stabilization control can be achieved, the direct current is transmitted to the 220V factory direct current bus 100, and the quality of output electric energy is high.
The rest of the structure is the same as that of embodiment 1.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a factory is with direct current battery utilization system that discharges which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a bus bar (100);
the power supply assembly (200) is connected with the bus (100) and comprises a positive grid-connected switch (201) connected with the bus (100), a negative grid-connected switch (202) and a storage battery pack (203) connected with the positive grid-connected switch (201) and the negative grid-connected switch (202); and the number of the first and second groups,
and a commutation module (300) connected to the power module (200), and including a positive electrode switch (301) and a negative electrode switch (302) connected to the power module (200), and a DC/DC commutation device (303) connected to the positive electrode switch (301) and the negative electrode switch (302).
2. The factory-used direct current storage battery discharging and utilizing system as claimed in claim 1, wherein: the bus (100) is a 220V direct current bus and comprises a positive electrode (101) and a negative electrode (102).
3. The factory-used direct current storage battery discharging and utilizing system as claimed in claim 2, wherein: the positive grid-connected switch (201) is connected with a positive electrode (101), and the positive electrode of the storage battery (203) is connected with the direct-current positive electrode (101) on the bus (100) through the positive grid-connected switch (201).
4. The factory-used direct current storage battery discharging and utilizing system as claimed in claim 2 or 3, wherein: the negative grid-connected switch (202) is connected with a negative electrode (102), and the negative electrode of the storage battery (203) is connected with the direct current negative electrode (102) on the bus (100) through the negative grid-connected switch (202).
5. The factory-used direct current storage battery discharging and utilizing system as claimed in claim 4, wherein: the DC/DC converter device (303) adopts a DC/AC inverter.
6. The factory-used direct current storage battery discharging and utilizing system according to claim 5, wherein: and the direct-current side positive electrode of the DC/DC converter device (303) is connected with the positive electrode of the storage battery pack (203) through the positive electrode switch (301) of the plant direct-current storage battery energy recovery system.
7. The factory-used direct current storage battery discharging and utilizing system as claimed in claim 5 or 6, wherein: and the negative electrode of the direct current side of the DC/DC converter device (303) is connected with the negative electrode of the storage battery pack (203) through the negative electrode switch (302) of the station direct current storage battery energy recovery system.
8. The factory-used direct current storage battery discharging and utilizing system according to claim 7, wherein: the output positive pole of the DC/DC converter device (303) is connected with the direct current positive pole (101) on the bus (100), and the output negative pole of the DC/DC converter device (303) is connected with the direct current negative pole (102) on the bus (100).
9. A method for adopting the factory direct current storage battery discharging and utilizing system as claimed in claims 1-8, characterized in that: when the storage battery pack (203) is subjected to a discharge test, firstly, the positive grid-connected switch (201) of the storage battery pack (203) and the negative grid-connected switch (202) of the storage battery pack (203) are disconnected, and then the positive switch (301) of the plant direct-current storage battery energy recovery system and the negative switch (302) of the plant direct-current storage battery energy recovery system are closed.
10. The factory-used direct-current storage battery discharging utilization method according to claim 9, characterized in that: the DC/DC converter device (303) returns the 220V direct current to the 220V direct current bus (100) to complete electric energy recovery; the DC/DC converter device (303) can bear instant power impact, can realize direct current voltage stabilization control, is conveyed to a 220V factory direct current bus (100), and has high quality of generated electric energy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110564417.0A CN113270889A (en) | 2021-05-24 | 2021-05-24 | Factory direct-current storage battery discharging utilization system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110564417.0A CN113270889A (en) | 2021-05-24 | 2021-05-24 | Factory direct-current storage battery discharging utilization system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949088A (en) * | 2021-10-14 | 2022-01-18 | 西安热工研究院有限公司 | Alternating current and direct current converting system for power plant and factory |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113949088A (en) * | 2021-10-14 | 2022-01-18 | 西安热工研究院有限公司 | Alternating current and direct current converting system for power plant and factory |
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Application publication date: 20210817 |