CN108306345B - Intelligent energy-saving device of energy storage inverter system - Google Patents
Intelligent energy-saving device of energy storage inverter system Download PDFInfo
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- CN108306345B CN108306345B CN201810189775.6A CN201810189775A CN108306345B CN 108306345 B CN108306345 B CN 108306345B CN 201810189775 A CN201810189775 A CN 201810189775A CN 108306345 B CN108306345 B CN 108306345B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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- H02J3/383—
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The intelligent energy-saving device of the energy storage inversion system is characterized in that a load access detection circuit is additionally arranged between a control module of the energy storage inversion system and an AC output unit of the energy storage inversion system; the load access detection circuit is used for detecting whether the AC output unit is accessed to the load or not and feeding back a detection result signal to the control module; the control module is used for switching on and switching off the power supply of the power consumption unit. Because the load access detection circuit is additionally arranged between the control module of the energy storage inversion system and the AC output unit of the energy storage inversion system, when the AC output unit is not accessed to a load, the control module cuts off the power supply of the power consumption unit, the power consumption of the system is reduced when the system is in an off-grid state, the energy utilization rate is maximized, and the service life of the battery is prolonged.
Description
Technical Field
The application relates to the technical field of energy storage, in particular to an intelligent energy-saving device of an energy storage inverter system.
Background
At present, energy storage technology is developing vigorously, and particularly in some fields such as photovoltaic energy storage, etc., the energy storage technology can smooth the uncertainty of photovoltaic power generation, wind power generation, etc., ensure the continuous supply of energy, and reduce the impact of electric power on a large power grid. Among these energy storage technologies, the energy saving requirements for the service life of the battery and the inverter energy storage system themselves are increasing. How to save the power consumption of the battery as much as possible and maximize the use of the stored energy in the energy storage inverter system is the next research direction.
In the traditional energy storage inversion system, the energy storage inversion system needs to provide electric energy for the AC load at any time, and the traditional scheme only enables the DC-DC boosting unit, the DC-AC inversion circuit and the AC output unit to be in a working state all the time, so that the loss of the system is increased, and the service life of a battery is shortened.
Disclosure of Invention
The application provides an energy storage inverter system intelligence economizer, when not having alternating load, the power consumption unit power supply is cut off to control module, reduces the consumption of system for the energy utilization maximize.
According to a first aspect, an embodiment provides an intelligent energy saving device for an energy storage inverter system, wherein a load access detection circuit is additionally arranged between a control module of the energy storage inverter system and an AC output unit of the energy storage inverter system; the load access detection circuit is used for detecting whether the AC output unit is accessed to the load or not and feeding back a detection result signal to the control module; the control module is used for switching on and switching off the power supply of the power consumption unit.
Preferably, when the load access detection circuit detects that the AC output unit is accessed to the load, the load access detection circuit outputs a first detection result signal, and otherwise, the load access detection circuit outputs a second detection result signal; and the control module switches on the power consumption unit to supply power when receiving the first detection result signal and switches off the power consumption unit to supply power when receiving the second detection result signal.
Preferably, the load access detection circuit comprises a switch S1; the AC output unit is provided with an AC output socket, and one side of the socket is provided with a movable protective doorstrip; when the AC output unit is connected with a load, the protection doorstrip is extruded by the load plug to move, the protection doorstrip passively extrudes the switch S1, the contact of the switch S1 is closed, the load connection detection circuit sends a power supply signal to the control module, and the control module is conducted with the power consumption unit to supply power; when the AC output unit is not connected with a load, the load plug is pulled out, the protection doorstrip is retreated, the switch S1 contact is disconnected, the power supply signal sent to the control module by the load connection detection circuit disappears, and the control module disconnects the power consumption unit to supply power.
Preferably, the load access detection circuit comprises a power supply VCC, a switch S1, an optocoupler U13 and a peripheral resistor; switch S1 one end connection power VCC, the other end passes through the resistance and is connected with opto-coupler U13 input, and the first output of opto-coupler U13 passes through resistance ground connection, and the opto-coupler second output is connected with control module.
Preferably, the power consumption unit includes a DC-DC boosting unit, a DC-AC inverting unit, and an AC output unit.
According to the intelligent energy-saving device of the energy storage inverter system in the embodiment, the load access detection circuit is additionally arranged between the control module of the energy storage inverter system and the AC output unit of the energy storage inverter system, so that when the AC output unit is connected with a load, the control module is conducted to the power consumption unit for supplying power; when the AC output unit is not connected with a load, the control module cuts off the power supply of the power consumption unit, reduces the self power consumption of the system in an off-grid state, maximizes the energy utilization rate and prolongs the service life of the battery.
Drawings
FIG. 1 is a block diagram of an embodiment of an energy storage inverter system;
FIGS. 2 and 3 are schematic views illustrating the positional relationship between the protective doorstrip and the touch switch;
fig. 4 is a circuit diagram of load access detection according to an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
The core idea of the invention is that: the control system judges whether the load is connected or not by triggering the on and off of a load access detection circuit switch through a protection doorstrip of the AC output unit, if the AC output unit is not connected with the load, power consumption units such as a DC-DC boosting unit, a DC-AC inverter circuit and an AC output unit are selected to be closed, the battery enters a power saving mode, and if the AC output unit is connected with the load, power consumption units such as the DC-DC boosting unit, the DC-AC inverter circuit and the AC output unit are selected to be opened, so that the energy saving purpose is achieved.
Please refer to fig. 1, which is a block diagram of an energy storage inverter system according to an embodiment.
The energy storage inversion system comprises an AC voltage reduction charging unit 1, a battery 2, a PV voltage reduction charging unit 3, a DC-DC voltage boosting unit 4, a DC-AC inversion unit 5, a control module 6, a load access detection circuit 7 and an AC output unit 8.
The battery 2 is used for supplying energy, and typical energy supply units are lead-acid batteries, lithium batteries, and the like. The DC-DC boost unit 4 is used to boost the voltage of the battery to the DC high voltage required by the inverter unit, and generally includes a high frequency isolation transformer to isolate the battery from the high voltage. The DC-AC inverter unit 5 converts the high direct voltage into a stable alternating voltage required by the alternating load. The AC output unit 8 filters the inverted alternating current and then sends the filtered alternating current to the alternating current load PV voltage reduction charging unit 3 to charge the battery 2 through the voltage reduction circuit, and the AC output unit is the only channel for obtaining the energy of the photovoltaic cell panel in the energy storage system. The AC voltage reduction charging unit 1 charges a battery after alternating current is rectified and filtered and then is reduced in voltage by a high-frequency isolation transformer, and is used for supplementing the problem of insufficient energy of a photovoltaic panel in rainy days in the whole energy storage inversion system. The control module 6 is the core of the whole energy storage inverter system and is responsible for the control and operation of the whole system. The load access detection circuit 7 is used for detecting whether the AC output unit 8 has an access load, and the load access detection circuit 7 is connected between the AC output unit 8 and the control module 6. When the load access detection circuit 7 detects that the AC output unit 8 is accessed to the load, a first detection result signal is output, and the control module switches on the power consumption unit to supply power when receiving the first detection result signal; when the load access detection circuit 7 detects that the AC output unit 8 does not access the load, a second detection result signal is output, and the control module disconnects the power consumption unit to supply power when receiving the second detection result signal.
The power consumption unit mainly comprises a DC-DC boosting unit, a DC-AC inversion unit and an AC output unit, and standby loss generated by the three units accounts for more than 70% of total standby loss. According to the intelligent energy-saving socket, whether the AC output socket has the AC load to be connected or not can be intelligently identified, so that whether the power consumption unit is closed or not is judged, and the purpose of intelligently saving energy is achieved. Referring to fig. 2 and 3, the load access detection circuit includes a switch S1, the switch S1 having a contact a and a contact B; the AC output unit is provided with an AC output socket 10, and a movable protective doorstrip 9 is arranged on the socket; when the AC output unit is connected with a load, the load plug 11 extrudes the protection doorstrip 9, the protection doorstrip 9 passively displaces to extrude a contact A of a switch S1, the contact A is extruded to be connected with a contact B, so that the contact of the switch S1 is closed, the load access detection circuit is conducted to the control module to send a power supply signal, and the control module is conducted to the power consumption unit to supply power; when the AC output unit is not connected with the load, the protection doorstrip returns to the original position, the S1 contact is disconnected, the power supply signal sent to the control module by the load connection detection circuit disappears, and the control module disconnects the power consumption unit to supply power.
When the load plug 11 is connected to the AC output socket 10, the protection door strip 9 is extruded by the load plug 11 to move and push the switch S1 contact to be closed, the load connection detection circuit is conducted, and then the load connection detection circuit sends a pulse signal to the control module; when the load plug 11 is pulled out, the protective door strip 9 is restored to the original position, the contact of the switch S1 is disconnected, and the pulse signal disappears; the control module turns on or off the power consumption units such as the DC-DC boosting unit, the DC-AC inversion unit, the AC output unit and the like according to the high and low levels of the pulse signal of the load access detection circuit to achieve the purpose of energy saving.
The judgment of the pulse signal by the control module and the on-off control of the power consumption unit by the control module are realized by adopting the existing software technology.
Please refer to fig. 4, which is a circuit diagram of a load access detection circuit according to an embodiment of the present invention.
The load access detection circuit comprises a power supply VCC, a touch switch S1, an optocoupler U13 and a peripheral resistor; touch switch S1 one end connection power VCC, the other end passes through resistance R38 and is connected with opto-coupler U13 input, and the ground connection is passed through resistance R42 to the first output of opto-coupler U13, and opto-coupler second output AC _ START is connected with control module.
The switch-off and switch-on of the S1 switch are pushed by a protection doorstrip on an AC output socket of the AC output unit, when the AC output socket is inserted into a load plug, the protection doorstrip can extrude the load plug to move, so that S1 is closed, at the moment, a pulse signal can be generated by an optical coupler U13 of a load access detection circuit, the pulse signal is sent to a control module through a second output end of the optical coupler, the control module can judge that a load is accessed after receiving the pulse signal, and therefore the power supply of the DC-DC voltage boosting unit, the DC-AC inversion unit and the AC output unit is turned on; when the AC output socket is pulled out of the input plug of the AC load, the protection doorstrip on the AC output socket can be restored to the original position, S1 is disconnected, the pulse signal of the load access detection circuit disappears, the control module judges that no load is accessed at the moment, and the power supply of the DC-DC boosting unit, the DC-AC inversion unit and the AC output unit can be cut off, so that the power consumption is reduced.
The scheme of the invention has the advantages that each internal relevant unit circuit can be immediately started as long as a load is connected, and the judgment is accurate regardless of the size of the AC load; while other energy-saving schemes need to judge the size of the output load to turn on the internal output circuit, and when the AC load is very small, the internal output circuit is easily turned off or turned on by mistake.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (4)
1. Energy storage inverter system intelligence economizer, its characterized in that: a load access detection circuit is additionally arranged between a control module of the energy storage inversion system and an AC output unit of the energy storage inversion system; the load access detection circuit is used for detecting whether the AC output unit is accessed to the load or not and feeding back a detection result signal to the control module; the load access detection circuit comprises a switch S1; the AC output unit is provided with an AC output socket, and one side of the socket is provided with a movable protective doorstrip; when the AC output unit is connected with a load, the protection doorstrip is extruded by the load plug to move, the protection doorstrip passively extrudes the switch S1, the contact of the switch S1 is closed, the load connection detection circuit sends a power supply signal to the control module, and the control module is conducted with the power consumption unit to supply power; when the AC output unit is not connected with a load, the load plug is pulled out, the protective doorstrip is retreated, the switch S1 contact is disconnected, the power supply signal sent to the control module by the load connection detection circuit disappears, and the control module disconnects the power consumption unit to supply power; the control module is used for switching on and switching off the power supply of the power consumption unit.
2. The intelligent energy-saving device of an energy storage inverter system according to claim 1, wherein the load access detection circuit outputs a first detection result signal when detecting that the AC output unit is accessed to the load, and outputs a second detection result signal when detecting that the AC output unit is not accessed to the load; and the control module switches on the power consumption unit to supply power when receiving the first detection result signal and switches off the power consumption unit to supply power when receiving the second detection result signal.
3. The intelligent energy-saving device for the energy storage inverter system according to claim 1, wherein the load access detection circuit comprises a power supply VCC, a switch S1, an optocoupler U13 and a peripheral resistor; switch S1 one end connection power VCC, the other end passes through the resistance and is connected with opto-coupler U13 input, and the first output of opto-coupler U13 passes through resistance ground connection, and the opto-coupler second output is connected with control module.
4. The intelligent energy-saving device of the energy storage inversion system as claimed in any one of claims 1 to 3, wherein the power consumption unit comprises a DC-DC boosting unit, a DC-AC inversion unit and an AC output unit.
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| CN201810189775.6A CN108306345B (en) | 2018-03-08 | 2018-03-08 | Intelligent energy-saving device of energy storage inverter system |
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| CN201810189775.6A CN108306345B (en) | 2018-03-08 | 2018-03-08 | Intelligent energy-saving device of energy storage inverter system |
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| CN108306345B true CN108306345B (en) | 2020-02-11 |
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| CN110445229A (en) * | 2019-07-22 | 2019-11-12 | 深圳市华思旭科技有限公司 | Accumulation power supply |
| CN110514932A (en) * | 2019-08-30 | 2019-11-29 | 广州市帝能云科技有限公司 | A kind of load detection circuit for access |
| CN111564966A (en) * | 2020-05-06 | 2020-08-21 | 东莞龙升电子有限公司 | Inverter switch control method and device, storage medium and intelligent equipment |
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| CN101674026B (en) * | 2009-10-12 | 2012-12-05 | 华南理工大学 | Low standby loss control circuit of switching power supply capable of automatically detecting load |
| CN203180550U (en) * | 2012-11-09 | 2013-09-04 | 广州市拓璞电器发展有限公司 | Charger circuit |
| CN204597800U (en) * | 2015-05-11 | 2015-08-26 | 东莞市华源光电科技有限公司 | Loop detecting energy-saving main-frequency inverter |
| CN204928608U (en) * | 2015-06-26 | 2015-12-30 | 广东欧得森电源科技有限公司 | On -vehicle dc -to -ac converter of digital sine wave |
| CN207967960U (en) * | 2018-03-08 | 2018-10-12 | 深圳古瑞瓦特新能源股份有限公司 | Energy storage inversion system intelligent energy-saving device |
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Effective date of registration: 20210204 Address after: 518101 2 / F and 3 / F, building 4, xibianling Jiayu Company Industrial Zone, Shangwu village, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN GROWATT NEW ENERGY Co.,Ltd. Address before: 518000 Guangdong Province Shenzhen Baoan District Shiyan Street Longteng community Guanghui road 28 Jiayu Industrial Zone office building a, first floor East, third floor, factory building B Patentee before: GROWATT NEW ENERGY TECHNOLOGY Co.,Ltd. |
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Denomination of invention: Intelligent energy saving device for energy storage inverter system Effective date of registration: 20210419 Granted publication date: 20200211 Pledgee: Shenzhen small and medium sized small loan Co., Ltd Pledgor: SHENZHEN GROWATT NEW ENERGY Co.,Ltd. Registration number: Y2021980002747 |
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Address after: 518101 floor a401, 4-13, building a, Sino German European Industrial Demonstration Park, Hangcheng Avenue, guxing community, Xixiang street, Bao'an District, Shenzhen, Guangdong Patentee after: Shenzhen Growatt New Energy Technology Co.,Ltd. Address before: 518101 2 / F and 3 / F, building 4, xibianling Jiayu Company Industrial Zone, Shangwu village, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN GROWATT NEW ENERGY Co.,Ltd. |
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Date of cancellation: 20220523 Granted publication date: 20200211 Pledgee: Shenzhen small and medium sized small loan Co.,Ltd. Pledgor: SHENZHEN GROWATT NEW ENERGY Co.,Ltd. Registration number: Y2021980002747 |