CN113377150B - MPPT self-adaptive switching control method and system for light storage system - Google Patents

MPPT self-adaptive switching control method and system for light storage system Download PDF

Info

Publication number
CN113377150B
CN113377150B CN202110736294.4A CN202110736294A CN113377150B CN 113377150 B CN113377150 B CN 113377150B CN 202110736294 A CN202110736294 A CN 202110736294A CN 113377150 B CN113377150 B CN 113377150B
Authority
CN
China
Prior art keywords
mppt
state
voltage
charge
light storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110736294.4A
Other languages
Chinese (zh)
Other versions
CN113377150A (en
Inventor
卫建荣
李维波
赵武生
付勇
孙运杰
许立
丁刘根
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Lingchong Chuangxiang New Energy Technology Co ltd
Original Assignee
Jiangsu Lingchong Chuangxiang New Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Lingchong Chuangxiang New Energy Technology Co ltd filed Critical Jiangsu Lingchong Chuangxiang New Energy Technology Co ltd
Priority to CN202110736294.4A priority Critical patent/CN113377150B/en
Publication of CN113377150A publication Critical patent/CN113377150A/en
Application granted granted Critical
Publication of CN113377150B publication Critical patent/CN113377150B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/66—Regulating electric power
    • G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The application relates to the technical field of light storage, and provides a MPPT self-adaptive switching control method and system for a light storage system, wherein the method comprises the following steps: detecting the state of charge of the energy storage battery; when the state of charge does not reach a preset value, controlling the photovoltaic equipment to operate in an MPPT state; when the state of charge reaches a preset value, the voltage of a direct current bus of the photovoltaic power generation system is adjusted through the light storage converter to exceed the voltage adjusting range of MPPT (maximum power point tracking) so as to limit the output of photovoltaic equipment; when the state of charge falls below a preset value, regulating the voltage of the direct current bus to be within the working voltage range of MPPT through the light storage converter so as to enable the photovoltaic equipment to operate in the MPPT state; through the method and the device, no matter under the off-grid environment or the grid-connected environment, the maximum power tracking can be adaptively switched according to the charge state of the energy storage battery, so that the running of the light storage system is more reliable and stable.

Description

MPPT self-adaptive switching control method and system for optical storage system
Technical Field
The application belongs to the technical field of light storage, and particularly relates to an MPPT self-adaptive switching control method for a light storage system.
Background
In recent years, new energy resources such as photovoltaic energy, wind power and the like are rapidly developed, and particularly, distributed new energy resources are more and more popularized on the background of realizing the purposes of energy conservation and emission reduction of carbon peak reaching and carbon neutralization. Among them, the large-scale popularization of distributed energy sources such as photovoltaic and the like is not separated from energy storage, and the combined application of photovoltaic and energy storage is gradually a new state.
At present, when distributed energy sources such as photovoltaic energy, energy storage and the like are comprehensively used, although an application case of an industrial photovoltaic power storage station exists, the technical level still needs to be perfected, and the aspects such as stable operation, coordination control, energy scheduling and the like need to be continuously upgraded; meanwhile, part of the existing equipment has poor reliability and higher cost. These factors all limit the scale-up and rapid growth of optical storage systems.
The method is characterized in that on the premise of ensuring the voltage stability of a direct-current bus, the voltage of the direct-current bus is coordinately controlled through photovoltaic and energy storage connected power devices (such as a contactor and a breaker) to ensure the power balance among the photovoltaic, the energy storage and a load; in a certain time period, when the voltage of a direct current bus is overshot, the photovoltaic is switched to a state of closing Maximum Power Point Tracking (MPPT); when the voltage of the direct current bus falls, the photovoltaic can be switched back to the MPPT state.
However, in order to cooperate with unattended operation of a photovoltaic system, the power electronic device of a photovoltaic loop is frequently switched on and off, and then photovoltaic power generation is started and stopped to adjust the voltage of a direct current bus, so that the contactor is likely to be adhered to each other after long-term operation, and the operation reliability is seriously reduced. In addition, the method does not fully consider practical application, such as load power change, equipment access pulse load and the like, and if the bus voltage is still passively regulated, the method not only does not match an automatic operation strategy, influences equipment operation, but also causes a light abandoning phenomenon and causes that light energy cannot be fully utilized. In addition, the execution unit for switching the MPPT state is a photovoltaic power optimizer, so that the efficiency is reduced due to electric energy loss, the equipment cost is also improved, and the market competitiveness is insufficient if the method is used for developing products. In addition, the method only explores photovoltaic, energy storage and load, and does not consider the mechanism in the grid-connected environment, namely the method is limited in the off-grid environment and is not strong in practicality.
Disclosure of Invention
The application aims to provide an MPPT self-adaptive switching control method and system for an optical storage system, and aims to solve the problems of poor reliability and low stability of a traditional power balance coordinated regulation and control method of the optical storage system.
A first aspect of the embodiments of the present application provides an MPPT adaptive switching control method for an optical storage system, where the optical storage system includes an optical storage converter, a photovoltaic device connected to a photovoltaic port of the optical storage converter, and an energy storage battery connected to an energy storage port of the optical storage converter, and the MPPT adaptive switching control method includes:
detecting the state of charge of the energy storage battery;
when the state of charge does not reach a preset value, controlling the photovoltaic equipment to operate in an MPPT state;
when the state of charge reaches the preset value, the voltage of a direct current bus of the photovoltaic equipment is adjusted through the light storage converter to exceed the voltage adjusting range of MPPT (maximum power point tracking), so that the output of the photovoltaic equipment is limited;
when the state of charge falls below the preset value, the voltage of the direct current bus is adjusted to be within the range of the working voltage of MPPT through the light storage converter, so that the photovoltaic equipment operates in the MPPT state.
Optionally, the detecting the state of charge of the energy storage battery includes detecting a voltage of the energy storage battery of the cell to determine the state of charge.
Optionally, the preset value ranges from 80% to 98% of the state of charge saturation value of the energy storage battery.
Optionally, the voltage regulation range of the MPPT is 700V to 900V.
Optionally, the adjusting, by the optical storage converter, the voltage of the dc bus thereof includes:
and adjusting the working parameters of a DC-DC converter and/or an AC-DC converter connected with the direct current bus in the light storage converter so as to adjust the voltage of the direct current bus.
A second aspect of the embodiments of the present application provides an MPPT adaptive switching control system for an optical storage system, the optical storage system includes an optical storage converter, a photovoltaic device connected to a photovoltaic port of the optical storage converter, and an energy storage battery connected to an energy storage port of the optical storage converter, the MPPT adaptive switching control system includes a control unit connected to the optical storage converter, the control unit includes:
the detection module is used for detecting the charge state of the energy storage battery;
the control module is used for controlling the photovoltaic equipment to operate in an MPPT state when the state of charge does not reach a preset value; when the state of charge reaches the preset value, the voltage of a direct current bus of the photovoltaic device is adjusted through the light storage converter to exceed the voltage adjusting range of MPPT (maximum power point tracking), so that the output of the photovoltaic device is limited; when the state of charge falls below the preset value, the voltage of the direct current bus is adjusted to be within the range of the working voltage of MPPT through the light storage converter, so that the photovoltaic equipment operates in the MPPT state.
Optionally, the detection module is configured to detect a voltage of the energy storage battery of the cell to determine the state of charge.
Optionally, the preset value ranges from 80% to 98% of the state of charge saturation value of the energy storage battery.
Optionally, the voltage regulation range of the MPPT is 700V to 900V.
Optionally, the control module is configured to adjust the voltage of the DC bus by adjusting an operating parameter of a DC-DC converter and/or an AC-DC converter in the light storage converter, which is connected to the DC bus.
According to the MPPT self-adaptive switching control method and system for the optical storage system, the self-adaptive switching can be carried out on the maximum power tracking according to the charge state of the energy storage battery no matter in an off-grid environment or a grid-connected environment, and the optical storage system is ensured to run more reliably and stably; in addition, the MPPT state switching does not need a photovoltaic power optimizer, the efficiency is reduced due to electric energy loss, and the equipment cost can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of an optical storage system according to an embodiment of the present application;
fig. 2 is a specific flowchart of an MPPT adaptive switching control method for an optical storage system according to an embodiment of the present disclosure;
fig. 3 is a block diagram of an MPPT adaptive switching control system for an optical storage system according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings to facilitate the description of the application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in operation as a limitation of the application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more, and "several" means one or more unless specifically limited otherwise.
Referring to fig. 1, the light storage system includes a light storage converter 100, a distributed photovoltaic device 200 connected to a photovoltaic port of the light storage converter 100, an energy storage battery 300 connected to an energy storage port of the light storage converter 100, and a control unit 400 connected to the light storage converter 100, wherein a grid port of the light storage converter 100 is used for connecting to a grid 500, and a load port of the light storage converter 100 is used for connecting to a load 600; a DC-DC (direct current-direct current) converter 110 is provided between the energy storage port of the optical storage converter 100 and the DC Bus, an AC-DC (alternating current-direct current) converter 120 is provided between the grid port and the load port of the optical storage converter 100 and the DC Bus, and the photovoltaic port is directly connected to the DC Bus. The control unit 400 is connected to the light storage converter 100 and is used for controlling the light storage converter 100 to operate.
The optical storage converter 100 can realize bidirectional flow of direct current and alternating current, can work in a direct current constant voltage mode, a direct current constant current mode, a constant power mode, an inversion voltage stabilization mode and the like, and can transmit voltage, current and power of a distributed photovoltaic loop to a control board in real time through a direct current electric meter in industrial optical storage equipment.
On/off-grid photovoltaic power limiting conditions, such as the entire pack voltage, the cell voltage, the state of charge, and the like of the energy storage system energy storage battery 300, may be preset in the control unit 400; and the control unit 400 may issue a dc Bus voltage command to the photovoltaic storage converter 100 to adjust the voltage of the dc Bus, and when the voltage exceeds the photovoltaic MPPT voltage regulation range, the distributed photovoltaic device 200 may not perform maximum power tracking, that is, may not consume the energy generated by the photovoltaic device 200.
The energy storage loop is kept smooth, and the energy storage battery 300 can be charged or supplemented by itself according to the energy conservation law. For example, when the photovoltaic device 200 is energy-rich, the energy storage cell 300 absorbs excess energy; when the photovoltaic device 200 generates the limited power, the energy storage battery 300 supplements the energy.
The control unit 400 is a central hub of the standardized optical storage System, and can acquire Battery information and the like transmitted by a Battery Management System (BMS) through communication interaction and also can directly acquire electric energy information of each endpoint in the aspect of information collection; in operation control, various operation logics can be executed, and the optical storage converter 100 can also be controlled, so that unattended operation of standardized optical storage products is realized.
Referring to fig. 1 and fig. 2, a first aspect of the present embodiment provides an MPPT adaptive switching control method for an optical storage system, including the following steps:
in step S110, the state of charge of the energy storage battery 300 is detected.
Generally, detecting the state of charge of the energy storage battery 300 may be detecting a voltage conversion of the energy storage battery 300 or the battery pack to obtain a corresponding state of charge. In some embodiments, the voltage of the individual energy storage cells 300 is detected as a photovoltaic power limit condition.
And step S120, when the state of charge does not reach the preset value, controlling the photovoltaic device 200 to operate in the MPPT state.
In some embodiments, the preset value of the state of charge as a photovoltaic power limitation condition is generally set around a typical saturation value, such as 80% to 98% of the saturation value. Optionally, when the charge state of the single energy storage battery 300 does not reach 95% of the saturation value, the photovoltaic device 200 always tracks the maximum power point to operate, so as to ensure that the light energy is fully utilized, and when the photovoltaic device 200 can meet the load requirement of the load 600, the energy storage battery 300 works in the charge state; when the photovoltaic device 200 does not meet the load demand of the load 600, the energy storage battery 300 supplements power to the dc Bus, and operates in a discharging state.
Step S130, when the state of charge reaches a preset value, the voltage of the dc Bus of the photovoltaic device is adjusted by the light storage converter 100 to exceed the voltage regulation range of the MPPT, so as to limit the output of the photovoltaic device 200.
In some embodiments, the voltage regulation range of the MPPT is 700V to 900V, and when the state of charge of the energy storage battery 300 does not reach a preset value, the voltage of the dc Bus is within the voltage regulation range of the MPPT. When the state of charge of the energy storage battery 300 reaches a preset value, it indicates that the photovoltaic power limitation condition is reached, the system adjusts the voltage of the direct current Bus to enable the voltage to exceed the voltage regulation range of the MPPT, at this time, the output of the photovoltaic device 200 is limited, and as for the load requirement of the load 600, the energy storage battery 300 outputs power to meet the load requirement.
Step S140, when the state of charge falls below the preset value, the light storage converter 100 adjusts the voltage of the dc Bus to the operating voltage range of the MPPT, so that the photovoltaic device 200 operates in the MPPT state.
At this time, the photovoltaic apparatus 200 resumes the maximum power point tracking again and operates in the MPPT state.
In this embodiment, the adjusting of the voltage of the DC Bus of the optical storage system specifically includes adjusting an operating parameter of the DC-DC converter 110 and/or the AC-DC converter 120 connected to the DC Bus in the optical storage system to adjust the voltage of the DC Bus. For example, in step S120 and step S140, the state of charge does not reach the preset value, that is, the electric quantity of the energy storage battery 300 is insufficient, and at this time, the voltage of the dc Bus may be adjusted to the operating voltage range of the MPPT. In step S130, when the state of charge reaches the preset value, that is, the electric quantity of the energy storage battery 300 is sufficient, the output power of the energy storage battery 300 may be raised by the DC-DC converter 110 alone to boost the voltage of the DC Bus, and certainly, the output power may also be raised by the AC-DC converter 120 alone using the power grid 500, and both may also be used to boost simultaneously.
In more detailed embodiments, the light storage system is in an off-grid or on-grid state respectively to describe the related embodiments.
When the light storage system is in an off-grid state:
1. before the photovoltaic power limit condition is not met, the distributed photovoltaic equipment 200 always tracks the maximum power point to operate, so that the full utilization of light energy is ensured, and when the light energy meets the load requirement, the energy storage battery 300 is charged; when the light energy does not meet the load requirement, the energy storage battery 300 supplements power.
2. Once the state of charge reaches a preset value, that is, when the system reaches a photovoltaic power limiting condition, the control unit 400 may issue a command for adjusting the voltage of the dc Bus to the optical storage converter 100, so that the voltage of the dc Bus exceeds the MPPT voltage regulation range, thereby greatly limiting the output of the photovoltaic device 200 and avoiding damage caused by over-charging of the battery; at this time, the energy storage battery 300 outputs power to meet the load demand.
3. When the state of charge of the energy storage battery 300 falls back to below the preset value, the control unit 400 issues a command for adjusting the voltage of the dc Bus, adjusts the voltage of the dc Bus to be within the MPPT working voltage range, and at this time, the distributed photovoltaic device 200 recovers the maximum power point tracking output.
When the light storage system is in a grid-connected state:
1. before the photovoltaic power limit condition is not met, the distributed photovoltaic equipment 200 always tracks the operation of the maximum power point to ensure that the light energy is fully utilized, and when the light energy meets the load requirement, the energy storage battery 300 is charged; when the light energy does not meet the load requirement, the energy storage battery 300 is charged. At this time, if the exchange power at the port of the power grid 500 of the optical storage converter 100 is limited, for example, the power amount of the internet is limited, and the load demand of the load 600 is not large, the photovoltaic device 200 has surplus power for power generation, and when the energy storage battery 300 is not saturated, the surplus power generated by the photovoltaic device is automatically absorbed;
2. when the state of charge of the energy storage cell 300 reaches a preset value, a photovoltaic power limiting condition is reached, which requires to throttle the generated energy of the photovoltaic, avoid overcharging the cell, and avoid damaging the light storage converter 100. At this time, the control unit 400 may issue a command for adjusting the dc Bus voltage to the optical storage converter 100, so that the dc Bus voltage exceeds the MPPT voltage regulation range, which may greatly limit the output of the photovoltaic device 200 and avoid transmitting power back to the power grid 500 when there is a constraint.
3. When the state of charge of the energy storage battery 300 falls back to below the preset value, the control unit 400 issues a command for adjusting the voltage of the dc Bus, adjusts the voltage of the dc Bus to be within the MPPT working voltage range, and at this time, the distributed photovoltaic device 200 recovers the maximum power point tracking output.
The MPPT self-adaptive switching control method realizes switching by adjusting the voltage of the direct current Bus through the light storage converter 100, avoids frequent on-off of a contactor at the 200 end of the photovoltaic equipment, greatly reduces the sticking possibility, improves the operational reliability of the light storage equipment, does not need to configure a photovoltaic power optimizer, not only improves the efficiency, but also saves the equipment cost, and can reduce the manufacturing cost of a light storage system. And can be used in the off-grid and on-grid states.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Referring to fig. 1 and fig. 3, a second aspect of the embodiments of the present application provides an MPPT adaptive switching control system for an optical storage system, where the optical storage system includes an optical storage converter 100, a photovoltaic device 200 connected to a photovoltaic port of the optical storage converter 100, and an energy storage battery 300 connected to an energy storage port of the optical storage converter 100, a grid port of the optical storage converter 100 is used to connect to a grid 500, and a load port of the optical storage converter 100 is used to connect to a load 600; the MPPT adaptive switching control system includes a control unit 400 connected to the light storage converter 100, and the control unit 400 includes:
the detection module 401 is configured to detect a state of charge of the energy storage battery 300;
the control module 402 is configured to control the photovoltaic device 200 to operate in the MPPT state when the state of charge does not reach the preset value; when the state of charge reaches a preset value, the voltage of the direct current Bus of the photovoltaic device is adjusted through the light storage converter 100 to exceed the voltage adjusting range of MPPT (maximum power point tracking), so that the output of the photovoltaic device 200 is limited; when the state of charge falls below the preset value, the voltage of the dc Bus is adjusted to the operating voltage range of MPPT by the optical storage converter 100, so that the photovoltaic device 200 operates in the MPPT state.
Optionally, the detection module 401 is specifically configured to detect the voltage of the single energy storage battery 300 to determine the state of charge.
Optionally, the preset value ranges from 80% to 98% of the state of charge saturation value of the energy storage battery 300.
Optionally, the voltage regulation range of the MPPT is 700V to 900V.
Optionally, the control module 402 is configured to adjust the voltage of the DC Bus by adjusting an operating parameter of the DC-DC converter 110 and/or the AC-DC converter 120 connected to the DC Bus in the light storage converter 100.
According to the MPPT self-adaptive switching control method and system for the optical storage system, the maximum power tracking can be self-adaptively switched according to the charge state of the energy storage battery 300 no matter in an off-grid environment or a grid-connected environment, so that the optical storage system is more reliable and stable in operation; in addition, the MPPT state switching does not need a photovoltaic power optimizer, the efficiency is reduced due to electric energy loss, and the equipment cost can be reduced.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. An MPPT adaptive switching control method for a light storage system, wherein the light storage system comprises a light storage converter, a photovoltaic device connected with a photovoltaic port of the light storage converter and an energy storage battery connected with an energy storage port of the light storage converter, and is characterized in that the method is used for off-grid and on-grid states of the light storage system, and the MPPT adaptive switching control method comprises the following steps:
detecting the state of charge of the energy storage battery;
when the state of charge does not reach a preset value, controlling the photovoltaic equipment to operate in an MPPT state;
when the state of charge reaches the preset value, the voltage of a direct current bus of the photovoltaic device is adjusted through the light storage converter to exceed the voltage adjusting range of MPPT (maximum power point tracking), so that the output of the photovoltaic device is limited;
when the state of charge falls below the preset value, the voltage of the direct current bus is adjusted to be within the working voltage range of MPPT through the light storage converter, so that the photovoltaic equipment operates in the MPPT state.
2. The MPPT adaptive switching control method of claim 1, wherein detecting a state of charge of an energy storage battery includes detecting a voltage of the energy storage battery of cells to determine the state of charge.
3. The MPPT adaptive switching control method of claim 1 or 2, wherein the preset value ranges from 80% to 98% of the state of charge saturation of the energy storage battery.
4. The MPPT adaptive switching control method of claim 1, wherein the MPPT is adjusted in a range of 700V to 900V.
5. The MPPT adaptive switching control method of claim 1, wherein the regulating the voltage of the dc bus thereof by the optical storage converter comprises:
and adjusting the working parameters of a DC-DC converter and/or an AC-DC converter connected with the direct current bus in the light storage converter so as to adjust the voltage of the direct current bus.
6. An MPPT adaptive switching control system for a light storage system, wherein the light storage system comprises a light storage converter, a photovoltaic device connected with a photovoltaic port of the light storage converter and an energy storage battery connected with an energy storage port of the light storage converter; the MPPT self-adaptive switching control system is characterized in that the system is used for the off-grid and on-grid states of the light storage system, the MPPT self-adaptive switching control system comprises a control unit connected with the light storage converter, and the control unit comprises:
the detection module is used for detecting the charge state of the energy storage battery;
the control module is used for controlling the photovoltaic equipment to operate in an MPPT state when the state of charge does not reach a preset value; when the state of charge reaches the preset value, the voltage of a direct current bus of the photovoltaic device is adjusted through the light storage converter to exceed the voltage adjusting range of MPPT (maximum power point tracking), so that the output of the photovoltaic device is limited; when the state of charge falls below the preset value, the voltage of the direct current bus is adjusted to be within the working voltage range of MPPT through the light storage converter, so that the photovoltaic equipment operates in the MPPT state.
7. The MPPT adaptive switching control system of claim 6, wherein the detection module is configured to detect a voltage of the energy storage battery of a cell to determine the state of charge.
8. The MPPT adaptive switching control system according to claim 6 or 7, wherein the preset value ranges from 80% to 98% of a state of charge saturation value of the energy storage battery.
9. The MPPT adaptive switching control system of claim 6, wherein the voltage regulation range of the MPPT is between 700V and 900V.
10. The MPPT adaptive switching control system of claim 6, wherein the control module is configured to adjust the voltage of the DC bus by adjusting operating parameters of a DC-DC converter and/or an AC-DC converter of the light storage converter that is connected to the DC bus.
CN202110736294.4A 2021-06-30 2021-06-30 MPPT self-adaptive switching control method and system for light storage system Active CN113377150B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110736294.4A CN113377150B (en) 2021-06-30 2021-06-30 MPPT self-adaptive switching control method and system for light storage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110736294.4A CN113377150B (en) 2021-06-30 2021-06-30 MPPT self-adaptive switching control method and system for light storage system

Publications (2)

Publication Number Publication Date
CN113377150A CN113377150A (en) 2021-09-10
CN113377150B true CN113377150B (en) 2022-12-23

Family

ID=77580143

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110736294.4A Active CN113377150B (en) 2021-06-30 2021-06-30 MPPT self-adaptive switching control method and system for light storage system

Country Status (1)

Country Link
CN (1) CN113377150B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114006403B (en) * 2021-11-05 2023-10-24 南京工业大学 Light-storage combined power generation system and multi-mode self-adaptive adjustment operation control algorithm thereof
CN114336821A (en) * 2021-12-09 2022-04-12 广东友电新能源科技有限公司 Light storage system control method, control circuit, light storage system and electronic equipment
CN115498621B (en) * 2022-09-29 2024-04-26 杭州铂科电子有限公司 Light stores up integrative device and system that fills
CN116048181A (en) * 2022-12-22 2023-05-02 珠海格力电器股份有限公司 Photovoltaic device and method for improving photovoltaic utilization rate of photovoltaic device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102437566A (en) * 2011-10-17 2012-05-02 中国电力科学研究院 Direct-current-bus-voltage-based adaptive coordination control method for distributed power supply
CN102916481B (en) * 2012-08-16 2015-08-26 深圳微网能源管理系统实验室有限公司 A kind of energy management method of direct current micro-grid system
CN106159989B (en) * 2015-03-31 2019-01-11 比亚迪股份有限公司 The control method and device of photovoltaic microgrid system
CN104810845B (en) * 2015-04-15 2017-10-20 国网冀北电力有限公司电力科学研究院 Distributed light energy storage participates in bus regulation adaptive controller and method
CN110912197B (en) * 2019-12-12 2021-05-04 佛山市思正能源技术有限公司 Modularized household light storage system capable of automatically scheduling energy and control method

Also Published As

Publication number Publication date
CN113377150A (en) 2021-09-10

Similar Documents

Publication Publication Date Title
CN113377150B (en) MPPT self-adaptive switching control method and system for light storage system
CN107785931B (en) Small-size electric energy management and coordinated control integrated device
KR101146670B1 (en) Energy management system and method for controlling thereof
CN102005817B (en) Uninterruptible power supply device based on microgrid and dispatching control method thereof
CN106849343A (en) The communication base station independently-powered switching system of wind-solar-diesel storage and power switching method
KR102421893B1 (en) Energy storage system
CN103545907A (en) Office photovoltaic direct-current power supply system and control method
KR101337576B1 (en) Method and system for state of charge management
WO2021232418A1 (en) Charging control method, energy storage module and electric equipment
CN114006403B (en) Light-storage combined power generation system and multi-mode self-adaptive adjustment operation control algorithm thereof
CN202004468U (en) New-energy power system
CN103441555A (en) Storage battery charging control method based on MPPT (Maximum Power Point Tracking) control
KR102092088B1 (en) Apparatus and method for energy storage system controlling operating mode
CN105515032B (en) intelligent micro-grid energy storage control method
CN113746160A (en) Photovoltaic energy charging and battery replacing cabinet system and method
CN118100239A (en) Operation method and system of photovoltaic energy storage system
WO2024131045A1 (en) Photovoltaic apparatus and method for increasing photovoltaic utilization rate of photovoltaic apparatus
CN117498295A (en) Off-grid type light firewood storage direct-current micro-grid power supply system and control method thereof
CN116247707B (en) Battery pack control method based on illumination intensity in mixed storage state
CN116742704A (en) Intelligent household energy storage system and implementation method thereof
CN116031920A (en) Hierarchical energy coordination control strategy for multiport power electronic equipment
CN110661299B (en) Power control method of photovoltaic system and photovoltaic system applying same
CN112886626A (en) Master-slave energy storage system of optical storage charging station and power tracking control method thereof
CN111371165A (en) Light storage and charging integrated machine and system suitable for flow battery
CN110768359B (en) Voltage control method and photovoltaic power supply device and system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant