CN114123446A - Composite energy storage photovoltaic power supply device - Google Patents
Composite energy storage photovoltaic power supply device Download PDFInfo
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- CN114123446A CN114123446A CN202111234997.3A CN202111234997A CN114123446A CN 114123446 A CN114123446 A CN 114123446A CN 202111234997 A CN202111234997 A CN 202111234997A CN 114123446 A CN114123446 A CN 114123446A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 34
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims abstract description 58
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 45
- 238000012544 monitoring process Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000005286 illumination Methods 0.000 claims description 6
- 238000012806 monitoring device Methods 0.000 abstract description 14
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 241000272165 Charadriidae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
-
- 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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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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
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a composite energy storage photovoltaic power supply device, which comprises: the system comprises a control unit, a super capacitor, a lithium battery, a photovoltaic panel and a load; the input end of the control unit is electrically connected with the output end of the photovoltaic panel, and the control unit is used for detecting the photovoltaic output power of the photovoltaic panel in real time to realize power supply control on a load; super capacitor and lithium cell all with the two-way electric connection of control unit, control unit's output and load electric connection are in order to realize supplying power for the load, work as photovoltaic board output is greater than the load power consumption time, control unit collects photovoltaic board output energy and converts the output to the load and supplies power. According to the invention, through a scientific and reasonable scheduling strategy, the advantages of the super capacitor and the lithium battery are fully exerted, the defects of the super capacitor and the lithium battery are overcome, and the problems of short service life and frequent replacement of the photovoltaic power supply energy storage battery of the on-line monitoring device of the overhead high-voltage transmission line are well solved.
Description
Technical Field
The invention relates to the technical field of photovoltaic power supply devices, in particular to a composite energy storage photovoltaic power supply device.
Background
In China, monitoring devices for the running state of an overhead high-voltage transmission line, such as a tower inclination monitoring device, a ground wire icing monitoring device and the like, adopt a large number of photovoltaic power supplies for power supply, and a common method is that electric energy is stored in a lithium battery after a photovoltaic panel generates electricity, and then the lithium battery supplies power for a load. However, the number of charging and discharging times of a general lithium battery is hundreds to thousands, and if one charging and discharging cycle is carried out every day, the lithium battery needs to be replaced for two or three years.
For high-voltage tower and ground wire environments where installation and maintenance are relatively difficult, users will often want the equipment installed in place to be able to operate for five, eight, or even longer periods without maintenance. Therefore, how to prolong the maintenance-free service life of the energy storage battery of the photovoltaic power supply becomes a problem to be solved urgently in the photovoltaic power supply technology of the high-voltage power transmission monitoring industry.
Under normal conditions, the service life of the super capacitor is more than 50 ten thousand times, but the super capacitor has low energy density and large self-discharge and is suitable for short-period and frequent charge and discharge application; while the life of lithium batteries is less than 1000 times, but the energy density is high, suitable for providing a longer endurance with a limited volume and weight. If the two can be complemented to reach the maximum function, the power supply device can realize the long-term maintenance-free power supply.
Disclosure of Invention
The invention aims to provide a composite energy storage photovoltaic power supply device to overcome the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a composite energy storage photovoltaic power supply apparatus comprising: the system comprises a control unit, a super capacitor, a lithium battery, a photovoltaic panel and a load;
the input end of the control unit is electrically connected with the output end of the photovoltaic panel, and the control unit is used for detecting the photovoltaic output power of the photovoltaic panel in real time to realize power supply control on a load;
super capacitor and lithium cell all with the two-way electric connection of control unit, control unit's output and load electric connection are in order to realize supplying power for the load, work as photovoltaic board output is greater than during load power consumption, control unit collects photovoltaic board output energy and converts output to the load and supplies power, work as photovoltaic board output is less than during load power consumption, control unit priority control super capacitor is the load power supply, and when super capacitor energy runs out, control unit switches to and uses the lithium cell to supply power for the load.
As a further description of the above technical solution:
the control unit comprises an energy collection module, an MPPT controller, a voltage conversion module, a charge-discharge monitoring module and a charge-discharge control module;
the energy collection module is an LTC3130 energy collection element for receiving electrical energy output by the photovoltaic panel and implementing monitoring of the output voltage of the photovoltaic panel;
the voltage conversion module is electrically connected with the energy collection module, the super capacitor and the lithium battery respectively so as to convert output voltages of the energy collection module, the super capacitor and the lithium battery into power supply voltage required by a load and supply power to the load.
As a further description of the above technical solution:
the MPPT controller is used for detecting the power generation voltage of the photovoltaic panel in real time and tracking the highest voltage and current values, so that the system achieves the highest charging efficiency.
As a further description of the above technical solution:
the charging and discharging monitoring module is respectively electrically connected with the super capacitor, the lithium battery and the photovoltaic panel, and is used for monitoring electric energy in the photovoltaic panel, the super capacitor and the lithium battery in real time.
As a further description of the above technical solution:
the charging and discharging control module is used for judging according to the photovoltaic output voltage monitored by the energy collecting module in real time, and when the photovoltaic output power P is obtainedSOLARNot less than load power consumption PLOADCollecting the output energy of the photovoltaic panel, converting the output energy into a load to supply power, and outputting the power P when the output power of the photovoltaic panel is upSOLAR< load Power consumption PLOADAnd the control unit preferentially controls the super capacitor to supply power to the load.
A power supply method of a composite energy storage photovoltaic power supply device, and based on the composite energy storage photovoltaic power supply device as claimed in any one of claims 1-5, the power supply method of the composite energy storage photovoltaic power supply device specifically comprises the following steps:
s1: the photovoltaic output voltage monitored by the energy collecting element LTC3130 in real time is judged through the charging and discharging control module;
s2: when the photovoltaic output power PSOLAR is larger than or equal to the load power consumption PLAAD, the photovoltaic panel is set to be in a lighting working mode, and at the moment, the energy output by the photovoltaic panel is collected and converted by the energy collecting module and is preferentially supplied to the load for use;
s3: when the photovoltaic output power PSOLAR is less than the load power consumption PLOAD, the non-illumination working mode is set, and at the moment, the energy stored by the super capacitor is preferentially used for supplying power to the load.
As a further description of the above technical solution:
in step S2, when the energy output by the photovoltaic panel is used by the energy supply load, the MPPT controller is used to efficiently charge the super capacitor, and when the super capacitor is fully charged, the lithium battery is continuously charged.
As a further description of the above technical solution:
in step S3, the energy stored in the super capacitor is preferentially used to supply power to the load, and when the energy in the super capacitor is used up, the energy stored in the lithium battery is switched to supply power to the load.
The invention provides a composite energy storage photovoltaic power supply device. The method has the following beneficial effects:
this compound energy storage photovoltaic power supply device passes through scientific and reasonable scheduling strategy, the dual advantage of super capacitor and lithium cell has been fully played, the not enough of the two has been remedied, the difficult problem that the online monitoring device photovoltaic power supply energy storage battery of overhead high tension transmission line is short-lived, need frequent change has been solved betterly, the work degree of difficulty and the work load of circuit monitoring device fortune dimension personnel have been reduced, the fortune dimension cost of monitoring device has been reduced, it is short-lived to solve the online monitoring device photovoltaic power supply energy storage battery of overhead high tension transmission line, it is big to change the maintenance degree of difficulty, technological problem with high costs, the operational reliability of online monitoring device has further been improved, the development and the popularization of online monitoring technique have been promoted.
Drawings
Fig. 1 is an overall schematic diagram of a composite energy storage photovoltaic power supply device according to the present invention;
FIG. 2 is a schematic diagram of a control unit according to the present invention;
fig. 3 is a flow chart of a power supply method of the composite energy storage photovoltaic power supply device according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, a composite energy storage photovoltaic power supply apparatus includes: the system comprises a control unit, a super capacitor, a lithium battery, a photovoltaic panel and a load; the input end of the control unit is electrically connected with the output end of the photovoltaic panel, and the control unit is used for detecting the photovoltaic output power of the photovoltaic panel in real time to realize power supply control on a load; the super capacitor and the lithium battery are both electrically connected with the control unit in a bidirectional mode, the output end of the control unit is electrically connected with the load to supply power to the load, when the output power of the photovoltaic panel is larger than the power consumption of the load, the control unit collects the output energy of the photovoltaic panel and converts the output energy to the load to supply power, when the output power of the photovoltaic panel is smaller than the power consumption of the load, the control unit preferentially controls the super capacitor to supply power to the load, and when the energy of the super capacitor is used up, the control unit switches to use the lithium battery to supply power to the load.
Specifically, the photovoltaic power supply who its photovoltaic power supply that is used for built on stilts high tension transmission line on-line measuring device that this embodiment provided, optional, the photovoltaic board is monocrystalline silicon photovoltaic board, and energy conservation rate and photoelectric conversion are efficient, long service life, and the control unit control supplies power to the load and includes two mode: illumination mode and no illumination mode, it is consuming when photovoltaic board output power is greater than load power, the energy of photovoltaic board output this moment, collect and the conversion through the energy collection module, it uses to preferentially supply the load, unnecessary energy utilizes the MPPT controller to carry out high efficiency to super capacitor and charges, super capacitor is full of the back, continue to charge the lithium cell, no illumination mode, it is consuming when photovoltaic board output power is less than load power, preferentially use the energy that super capacitor stored for the load power supply, super capacitor energy runs out, just can switch to the energy of using the lithium cell to store.
This compound energy storage photovoltaic power supply device passes through scientific and reasonable scheduling strategy, the dual advantage of super capacitor and lithium cell has been fully played, the not enough of the two has been remedied, the difficult problem that the online monitoring device photovoltaic power supply energy storage battery of overhead high tension transmission line is short-lived, need frequent change has been solved betterly, the work degree of difficulty and the work load of circuit monitoring device fortune dimension personnel have been reduced, the fortune dimension cost of monitoring device has been reduced, it is short-lived to solve the online monitoring device photovoltaic power supply energy storage battery of overhead high tension transmission line, it is big to change the maintenance degree of difficulty, technological problem with high costs, the operational reliability of online monitoring device has further been improved, the development and the popularization of online monitoring technique have been promoted.
The control unit comprises an energy collection module, an MPPT controller, a voltage conversion module, a charge-discharge monitoring module and a charge-discharge control module; the energy collection module is an LTC3130 energy collection element, and the LTC3130 energy collection element is used for receiving electric energy output by the photovoltaic panel and monitoring the output voltage of the photovoltaic panel; the voltage conversion module is electrically connected with the energy collection module, the super capacitor and the lithium battery respectively so as to convert output voltages of the energy collection module, the super capacitor and the lithium battery into power supply voltage required by a load and supply power to the load.
The MPPT controller is used for detecting the power generation voltage of the photovoltaic panel in real time and tracking the highest voltage and current values, so that the system achieves the highest charging efficiency.
The charging and discharging monitoring module is respectively electrically connected with the super capacitor, the lithium battery and the photovoltaic panel, and is used for monitoring electric energy in the photovoltaic panel, the super capacitor and the lithium battery in real time.
The charging and discharging control module is used for judging according to the photovoltaic output voltage monitored by the energy collecting module in real time, and when the photovoltaic output power P is obtainedSOLARNot less than load power consumption PLOADCollecting the output energy of the photovoltaic panel, converting the output energy into a load to supply power, and outputting the power P when the output power of the photovoltaic panel is upSOLAR< load Power consumption PLOADAnd the control unit preferentially controls the super capacitor to supply power to the load.
A power supply method of a composite energy storage photovoltaic power supply device is based on the composite energy storage photovoltaic power supply device, and the power supply method of the composite energy storage photovoltaic power supply device specifically comprises the following steps:
s1: the photovoltaic output voltage monitored by the energy collecting element LTC3130 in real time is judged through the charging and discharging control module;
s2: when photovoltaic output power PSOLARNot less than load power consumption PLOADThe photovoltaic panel is set to be in a lighting working mode, and at the moment, the energy output by the photovoltaic panel is collected and converted by the energy collection module and is preferentially supplied to a load for use;
s3: when photovoltaic output power PSOLAR< load Power consumption PLOADAnd setting the operation mode to be a no-illumination operation mode, wherein the energy stored by the super capacitor is preferentially used for supplying power to the load.
In step S2, the MPPT controller is used to efficiently charge the super capacitor with the excess energy after the energy output by the photovoltaic panel is used by the load, and the lithium battery is continuously charged after the super capacitor is fully charged. In step S3, the energy stored in the super capacitor is preferentially used to supply power to the load, and when the energy in the super capacitor is used up, the energy stored in the lithium battery is switched to supply power to the load.
According to the control strategy of the power supply method of the composite energy storage photovoltaic power supply device, under the common weather condition, the electric energy is stored and released, the electric energy is mainly borne by the super capacitor, the lithium battery is only used as the backup of the super capacitor, namely, under the conventional weather condition, the lithium battery is kept in a full power state, but is rarely used or not used, only when the super capacitor runs into the continuous rainy weather, the energy storage of the lithium battery can be used when the energy storage of the super capacitor is used up, the loss of the lithium battery can be reduced to the greatest extent by the mode, the service life of the lithium battery is prolonged, the replacement frequency is reduced, and the long-term maintenance-free operation of the overhead transmission line on-line monitoring power supply device is realized.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A composite energy storage photovoltaic power supply device, comprising: the system comprises a control unit, a super capacitor, a lithium battery, a photovoltaic panel and a load;
the input end of the control unit is electrically connected with the output end of the photovoltaic panel, and the control unit is used for detecting the photovoltaic output power of the photovoltaic panel in real time to realize power supply control on a load;
super capacitor and lithium cell all with the two-way electric connection of control unit, control unit's output and load electric connection are in order to realize supplying power for the load, work as photovoltaic board output is greater than during load power consumption, control unit collects photovoltaic board output energy and converts output to the load and supplies power, work as photovoltaic board output is less than during load power consumption, control unit priority control super capacitor is the load power supply, and when super capacitor energy runs out, control unit switches to and uses the lithium cell to supply power for the load.
2. The composite energy storage photovoltaic power supply device according to claim 1, wherein the control unit comprises an energy collection module, an MPPT controller, a voltage conversion module, a charge-discharge monitoring module and a charge-discharge control module;
the energy collection module is an LTC3130 energy collection element, and the LTC3130 energy collection element is used for receiving electric energy output by the photovoltaic panel and monitoring the output voltage of the photovoltaic panel in real time;
the voltage conversion module is electrically connected with the energy collection module, the super capacitor and the lithium battery respectively, and is used for converting output voltages of the energy collection module, the super capacitor and the lithium battery into power supply voltages required by a load so as to supply power to the load.
3. The device as claimed in claim 2, wherein the MPPT controller is configured to detect the generated voltage of the photovoltaic panel in real time and track the maximum voltage and current values to achieve the maximum charging efficiency of the system.
4. The composite energy storage photovoltaic power supply device as claimed in claim 2, wherein the charge and discharge monitoring module is electrically connected with the super capacitor, the lithium battery and the photovoltaic panel respectively, and is used for monitoring the electric energy in the photovoltaic panel, the super capacitor and the lithium battery in real time.
5. The composite energy storage photovoltaic power supply device according to claim 2, wherein the charge and discharge control module is configured to perform judgment according to the photovoltaic output voltage monitored by the energy collection module in real time, when the photovoltaic output power P is obtainedSOLARNot less than load power consumption PLOADCollecting the output energy of the photovoltaic panel, converting the output energy into a load to supply power, and outputting the power P when the output power of the photovoltaic panel is upSOLAR< load Power consumption PLOADAnd the control unit preferentially controls the super capacitor to supply power to the load.
6. A power supply method of a composite energy storage photovoltaic power supply device, and the composite energy storage photovoltaic power supply device is based on any one of claims 1 to 5, and the power supply method of the composite energy storage photovoltaic power supply device specifically comprises the following steps:
s1: the photovoltaic output voltage monitored by the energy collecting element LTC3130 in real time is judged through the charging and discharging control module;
s2: when photovoltaic output power PSOLARNot less than load power consumption PLOADThe photovoltaic panel is set to be in a lighting working mode, and at the moment, the energy output by the photovoltaic panel is collected and converted by the energy collection module and is preferentially supplied to a load for use;
s3: when photovoltaic output power PSOLAR< load Power consumption PLOADAnd setting the operation mode to be a no-illumination operation mode, wherein the energy stored by the super capacitor is preferentially used for supplying power to the load.
7. The method as claimed in claim 6, wherein in step S2, when the energy output by the photovoltaic panel is used by the load, the excess energy is charged to the super capacitor with high efficiency by the MPPT controller, and when the super capacitor is full, the lithium battery is charged.
8. The method as claimed in claim 6, wherein in step S3, the energy stored in the super capacitor is used preferentially to supply power to the load, and when the super capacitor runs out of energy, the method switches to the energy stored in the lithium battery to supply power to the load.
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| CN202111234997.3A CN114123446A (en) | 2021-10-22 | 2021-10-22 | Composite energy storage photovoltaic power supply device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114785624A (en) * | 2022-05-16 | 2022-07-22 | 深圳市特发信息股份有限公司 | Local area network communication system and power self-supply mutual supply method thereof |
| CN115483748A (en) * | 2022-09-20 | 2022-12-16 | 深圳鸿源博得新能源技术发展有限公司 | Method for stabilizing output power of photovoltaic power generation and improving photovoltaic power generation efficiency |
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| CN102931687A (en) * | 2012-10-12 | 2013-02-13 | 华北电力大学（保定） | Power adjustment method for hybrid energy storage photovoltaic power station |
| CN104167781A (en) * | 2014-07-31 | 2014-11-26 | 国家电网公司 | Wind-solar complementary power generation and energy storage control system |
| CN208369226U (en) * | 2018-05-02 | 2019-01-11 | 北方节能股份有限公司 | A kind of hybrid energy-storing photovoltaic grid-connected device |
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2021
- 2021-10-22 CN CN202111234997.3A patent/CN114123446A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102931687A (en) * | 2012-10-12 | 2013-02-13 | 华北电力大学（保定） | Power adjustment method for hybrid energy storage photovoltaic power station |
| CN104167781A (en) * | 2014-07-31 | 2014-11-26 | 国家电网公司 | Wind-solar complementary power generation and energy storage control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114785624A (en) * | 2022-05-16 | 2022-07-22 | 深圳市特发信息股份有限公司 | Local area network communication system and power self-supply mutual supply method thereof |
| CN115483748A (en) * | 2022-09-20 | 2022-12-16 | 深圳鸿源博得新能源技术发展有限公司 | Method for stabilizing output power of photovoltaic power generation and improving photovoltaic power generation efficiency |
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