CN114142510A - Centralized power supply system and method of off-grid energy storage inverter - Google Patents
Centralized power supply system and method of off-grid energy storage inverter Download PDFInfo
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- CN114142510A CN114142510A CN202111511235.3A CN202111511235A CN114142510A CN 114142510 A CN114142510 A CN 114142510A CN 202111511235 A CN202111511235 A CN 202111511235A CN 114142510 A CN114142510 A CN 114142510A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 21
- 238000010586 diagram Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a centralized power supply system and a centralized power supply method for an off-grid energy storage inverter. When the system works, the system controller controls the shunt distribution equipment to adjust the working time of each user load according to the actual output power capacity of the high-power energy storage inverter, the actual working power of each user load and the preset priority of each user load, and the electric energy in the high-power energy storage inverter is distributed to each user load. The invention overcomes the problems that the working time of the load can not be adjusted and the electric energy of the energy storage inverter can not be adjusted due to the change of the actual power of the load in the control mode of the conventional energy storage inverter on the basis of the design and the use method of the high-power energy storage inverter system, and can solve the problem that the electric energy of the inverter can not be reasonably distributed and utilized in the power supply mode of the conventional off-grid energy storage power grid.
Description
Technical Field
The invention relates to the field of power supply of energy storage inverters, in particular to a centralized power supply system and method of an off-grid energy storage inverter.
Background
At present, high-power off-grid energy storage inverters all output three-phase alternating current, concentrated power supplies power to various loads, and distributed power and backup time for different loads are fixed and unchangeable, so that when actual power of different loads changes or rated output power capacity of the inverters changes, backup service time of the loads cannot be effectively controlled, electric energy regulation cannot be performed, electric energy waste is caused, and the service efficiency of the inverters is greatly reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a centralized power supply system and a centralized power supply method of an off-grid energy storage inverter aiming at the defects involved in the background technology.
The invention adopts the following technical scheme to solve the technical problems
A centralized power supply system of an off-grid energy storage inverter comprises a high-power energy storage inverter, a shunt power distribution device, a power detection module and a system controller;
the high-power energy storage inverter is electrically connected with the input end of the shunt distribution equipment and is used for storing electric energy of an external input power supply to supply power and transmitting the actual available power of the high-power energy storage inverter to the system controller in real time;
the output end of the shunt distribution equipment is connected to each user load and is used for switching on or switching off each user load so as to adjust the working time of each user load;
the power detection module comprises a plurality of power detection devices which correspond to the user loads one to one, and the power detection devices are used for detecting the actual working power of the corresponding user loads and transmitting the actual working power to the system controller in real time;
the system controller is electrically connected with the high-power energy storage inverter, the shunt distribution equipment and each power detection equipment respectively, and is used for controlling the shunt distribution equipment to adjust the working time of each user load according to the actual output power capacity of the high-power energy storage inverter, the actual working power of each user load and the preset priority of each user load, and distributing the electric energy in the high-power energy storage inverter to each user load.
The invention also discloses a centralized power supply method of the centralized power supply system of the off-grid energy storage inverter, which comprises the following steps:
step 1), controlling a high-power energy storage inverter to start, and setting a priority relation of each user load on a system controller;
step 2), the high-power energy storage inverter receives power supply received from an input power supply to store electric energy and transmits the actual available power to the system controller in real time, and meanwhile, each power detection device transmits the actual power of the user load detected by the power detection device to the system controller in real time;
step 3), the system controller calculates the backup time of each user load according to the actual available power of the high-capacity energy storage inverter and the actual power of each user load, and the calculation formula is as follows:
T1=T0*P0/P1
wherein, T1 is the backup time of the user load, P1 is the actual power of the user load, P0 is the rated power of the user load, and T0 is the backup working time of the user load rating;
and 4), the system controller controls the shunt distribution equipment to adjust the working time of each user load according to the preset priority relation of each user load and the backup time of each user load, and distributes the electric energy in the high-power energy storage inverter to each user load.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
the invention overcomes the problems that the back-up service time of the load can not be adjusted and the electric energy of the inverter can not be adjusted due to the change of the actual power of the load in the control mode of the prior energy storage inverter on the design and the use method of the energy storage inverter system, and greatly improves the use efficiency of the energy storage inverter system.
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a high-power off-grid energy storage inverter according to the present invention;
FIG. 3 is a schematic diagram of the shunt power distribution apparatus of the present invention;
fig. 4 is a logic flow diagram of the centralized power supply method of the present invention.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.
As shown in fig. 1, the present invention discloses a centralized power supply system of an off-grid energy storage inverter, which includes a high-power energy storage inverter, a shunt power distribution device, a power detection module, and a system controller;
the high-power energy storage inverter is electrically connected with the input end of the shunt distribution equipment and is used for storing electric energy of an external input power supply to supply power and transmitting the actual available power of the high-power energy storage inverter to the system controller in real time;
the output end of the shunt distribution equipment is connected to each user load and is used for switching on or switching off each user load so as to adjust the working time of each user load;
the power detection module comprises a plurality of power detection devices which correspond to the user loads one to one, and the power detection devices are used for detecting the actual working power of the corresponding user loads and transmitting the actual working power to the system controller in real time;
the system controller is electrically connected with the high-power energy storage inverter, the shunt distribution equipment and each power detection equipment respectively, and is used for controlling the shunt distribution equipment to adjust the working time of each user load according to the actual output power capacity of the high-power energy storage inverter, the actual working power of each user load and the preset priority of each user load, and distributing the electric energy in the high-power energy storage inverter to each user load.
FIG. 2 is a schematic diagram of the internal structure of a high-power energy storage inverter; fig. 3 is an internal structural view of the shunt power distribution apparatus. Both high power storage inverters and shunt power distribution equipment are known in the art and will not be described in detail herein.
As shown in fig. 4, the present invention also discloses a centralized power supply method of the centralized power supply system of the off-grid energy storage inverter, which comprises the following steps:
step 1), controlling a high-power energy storage inverter to start, and setting a priority relation of each user load on a system controller;
step 2), the high-power energy storage inverter receives power supply received from an input power supply to store electric energy and transmits the actual available power to the system controller in real time, and meanwhile, each power detection device transmits the actual power of the user load detected by the power detection device to the system controller in real time;
step 3), the system controller calculates the backup time of each user load according to the actual available power of the high-capacity energy storage inverter and the actual power of each user load, and the calculation formula is as follows:
T1=T0*P0/P1
wherein, T1 is the backup time of the user load, P1 is the actual power of the user load, P0 is the rated power of the user load, and T0 is the backup working time of the user load rating;
and 4), the system controller controls the shunt distribution equipment to adjust the working time of each user load according to the preset priority relation of each user load and the backup time of each user load, and distributes the electric energy in the high-power energy storage inverter to each user load.
If the rated design power specification of a certain load of the energy storage inverter is 5KVA, the backup time is 1 hour, and the actual power of the load is 2.5KVA at present, the system can adjust the backup time of the load to 2 hours so as to fully utilize the aim of distributing electric energy by the energy storage inverter. When the residual electric quantity of the inverter conflicts with the maximum distributed electric quantity of the load, the system controls different loads to be protected and disconnected according to a preset priority and a certain safe sequence, so that the inverter is protected and the energy of the inverter is optimally utilized.
It should be emphasized that although only one system controller is used in the present embodiment, in practical use, a plurality of system controllers may be connected in parallel to each other to back up each other, so as to increase the safety performance.
In conclusion, the system and the method of the invention overcome the defects that the power supply system of the energy storage inverter cannot adjust the working time of the load due to the change of the actual power of the load and the electric energy of the inverter cannot be adjusted, thereby causing the waste of the electric energy, and improve the service efficiency of the energy storage inverter system.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A centralized power supply system of an off-grid energy storage inverter is characterized by comprising a high-power energy storage inverter, a shunt power distribution device, a power detection module and a system controller;
the high-power energy storage inverter is electrically connected with the input end of the shunt distribution equipment and is used for storing electric energy of an external input power supply to supply power and transmitting the actual available power of the high-power energy storage inverter to the system controller in real time;
the output end of the shunt distribution equipment is connected to each user load and is used for switching on or switching off each user load so as to adjust the working time of each user load;
the power detection module comprises a plurality of power detection devices which correspond to the user loads one to one, and the power detection devices are used for detecting the actual working power of the corresponding user loads and transmitting the actual working power to the system controller in real time;
the system controller is electrically connected with the high-power energy storage inverter, the shunt distribution equipment and each power detection equipment respectively, and is used for controlling the shunt distribution equipment to adjust the working time of each user load according to the actual output power capacity of the high-power energy storage inverter, the actual working power of each user load and the preset priority of each user load, and distributing the electric energy in the high-power energy storage inverter to each user load.
2. The centralized power supply method of the centralized power supply system of the off-grid energy storage inverter according to claim 1, comprising the steps of:
step 1), controlling a high-power energy storage inverter to start, and setting a priority relation of each user load on a system controller;
step 2), the high-power energy storage inverter receives power supply received from an input power supply to store electric energy and transmits the actual available power to the system controller in real time, and meanwhile, each power detection device transmits the actual power of the user load detected by the power detection device to the system controller in real time;
step 3), the system controller calculates the backup time of each user load according to the actual available power of the high-capacity energy storage inverter and the actual power of each user load, and the calculation formula is as follows:
T1=T0*P0/P1
wherein, T1 is the backup time of the user load, P1 is the actual power of the user load, P0 is the rated power of the user load, and T0 is the backup working time of the user load rating;
and 4), the system controller controls the shunt distribution equipment to adjust the working time of each user load according to the preset priority relation of each user load and the backup time of each user load, and distributes the electric energy in the high-power energy storage inverter to each user load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111511235.3A CN114142510A (en) | 2021-12-06 | 2021-12-06 | Centralized power supply system and method of off-grid energy storage inverter |
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| CN202111511235.3A CN114142510A (en) | 2021-12-06 | 2021-12-06 | Centralized power supply system and method of off-grid energy storage inverter |
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| CN114142510A true CN114142510A (en) | 2022-03-04 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101188360A (en) * | 2006-11-17 | 2008-05-28 | 中达电通股份有限公司 | UPS power central power supply system and its method |
| CN104079008A (en) * | 2014-06-25 | 2014-10-01 | 深圳市汇川技术股份有限公司 | Power supply method and system based on microgrid |
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2021
- 2021-12-06 CN CN202111511235.3A patent/CN114142510A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101188360A (en) * | 2006-11-17 | 2008-05-28 | 中达电通股份有限公司 | UPS power central power supply system and its method |
| CN104079008A (en) * | 2014-06-25 | 2014-10-01 | 深圳市汇川技术股份有限公司 | Power supply method and system based on microgrid |
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