CN116581812A - Hybrid light storage inverter, control method and photovoltaic energy storage system - Google Patents

Hybrid light storage inverter, control method and photovoltaic energy storage system Download PDF

Info

Publication number
CN116581812A
CN116581812A CN202310390983.3A CN202310390983A CN116581812A CN 116581812 A CN116581812 A CN 116581812A CN 202310390983 A CN202310390983 A CN 202310390983A CN 116581812 A CN116581812 A CN 116581812A
Authority
CN
China
Prior art keywords
module
direct current
inversion
control module
energy
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.)
Pending
Application number
CN202310390983.3A
Other languages
Chinese (zh)
Inventor
丁凯
徐成斌
陈锐
祖连兴
祝维靖
许�鹏
龚戈峰
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.)
Changyuan Shenrui Energy Technology Co ltd
Original Assignee
Changyuan Shenrui 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 Changyuan Shenrui Energy Technology Co ltd filed Critical Changyuan Shenrui Energy Technology Co ltd
Priority to CN202310390983.3A priority Critical patent/CN116581812A/en
Publication of CN116581812A publication Critical patent/CN116581812A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application provides a hybrid light storage inverter, a control method and a photovoltaic energy storage system, wherein the hybrid light storage inverter comprises a first light energy direct current conversion module, and a first energy supply end direct current is converted into a direct current with preset voltage according to a first light energy conversion signal or a first energy storage conversion signal; the second light energy direct current conversion module converts the direct current of the second energy supply end into the direct current of the preset voltage according to the second light energy conversion signal or the second energy storage conversion signal; and the inversion module is used for converting the direct current of the preset voltage into alternating current. According to the hybrid light storage inverter, when all energy supply ends are connected into the photovoltaic assembly, all energy storage equipment or both the photovoltaic assembly and the energy storage equipment, direct current at the power supply ends can be converted into alternating current, and the direct current at the preset voltage is converted into the alternating current through the inversion module for users to use, so that when the hybrid light storage inverter faces to various application scenes, different inverters are not required to be replaced, and the hybrid light storage inverter is convenient to use and low in cost.

Description

Hybrid light storage inverter, control method and photovoltaic energy storage system
Technical Field
The application belongs to the technical field of photovoltaic energy storage, and particularly relates to a hybrid light storage inverter, a control method and a photovoltaic energy storage system.
Background
Photovoltaic power generation technology generally mainly utilizes the photovoltaic effect of semiconductor interfaces to convert light energy (particularly solar light energy) into electrical energy. As photovoltaic power generation technology continues to mature, more and more households and businesses will choose to utilize photovoltaic energy storage systems to supply or store energy.
In photovoltaic energy storage system, often need the dc-to-ac power of dc-to-ac power conversion of inverter with energy supply end, for example, adopt the photovoltaic inverter when energy supply end all connects photovoltaic module, adopt the energy storage dc-to-ac power when energy supply end all connects energy storage equipment, adopt the light to store the dc-to-ac power when energy supply end connects photovoltaic module and energy storage equipment simultaneously to lead to the user to need change different dc-to-ac power according to the application scenario, the dc-to-ac power conversion type is more, uses inconvenience and the cost is higher.
Disclosure of Invention
The application aims to provide a hybrid light storage inverter, a control method and a photovoltaic energy storage system, and aims to solve the problems of more inverter types, inconvenient use and higher cost in the traditional photovoltaic energy storage system.
In order to achieve the above object, in a first aspect, an embodiment of the present application provides a hybrid light storage inverter, including a first light energy dc conversion module, a second light energy dc conversion module, an inverter module, a charge-discharge control module, and an inverter control module;
the inversion module is respectively and electrically connected with the first light energy direct current conversion module, the second light energy direct current conversion module, the charge and discharge control module and the inversion control module, the first light energy direct current conversion module is also respectively and electrically connected with the charge and discharge control module and the inversion control module, and the second light energy direct current conversion module is also respectively and electrically connected with the charge and discharge control module and the inversion control module;
the first light energy direct current conversion module is configured to convert the direct current of the first energy supply end into the direct current of the preset voltage according to the first light energy conversion signal or the first energy storage conversion signal;
the second light energy direct current conversion module is configured to convert direct current of a second energy supply end into direct current of the preset voltage according to a second light energy conversion signal or a second energy storage conversion signal;
the inversion module is configured to convert the direct current of the preset voltage into alternating current according to an inversion signal;
the charge-discharge control module is configured to generate the first light energy conversion signal when a direct current conversion signal is received and the first light energy direct current conversion module is connected with a first photovoltaic module, or generate the first energy storage conversion signal when the first light energy direct current conversion module is connected with first energy storage equipment;
and/or generating the second light energy conversion signal when a direct current conversion signal is received and the second light energy direct current conversion module is connected to a second photovoltaic module, or generating the second energy storage conversion signal when the second light energy direct current conversion module is connected to a second energy storage device;
the inversion control module is configured to output the inversion signal when receiving the direct current inversion signal and the inversion module accesses the direct current of the preset voltage.
In another possible implementation manner of the first aspect, the hybrid light storage inverter further includes a master control module;
the main control module is respectively and electrically connected with the charge and discharge control module and the inversion control module;
the main control module is configured to generate the direct current conversion signal and the direct current inversion signal according to a remote control signal.
In another possible implementation manner of the first aspect, the hybrid light storage inverter further includes a first filtering module and a second filtering module;
the first filtering module is electrically connected with the first light energy direct current conversion module, and the second filtering module is electrically connected with the second light energy direct current conversion module;
the first filtering module is configured to filter the first energy supply end direct current when the first photovoltaic module or the first energy storage device is connected;
the second filtering module is configured to filter the second energy supply end direct current when the second photovoltaic module or the second energy storage device is connected.
In another possible implementation manner of the first aspect, the hybrid light storage inverter further includes an electrical energy output module;
the electric energy output module is respectively and electrically connected with the inversion module, the charge-discharge control module and the inversion control module;
the power output module is configured to output the alternating current when receiving a power output signal;
the inverter control module is further configured to generate the power output signal based on a remote control signal.
In another possible implementation manner of the first aspect, the power output module includes a first switch module and a second switch module;
the first switch module is respectively and electrically connected with the inversion module, the charge-discharge control module, the inversion control module and the power grid; the second switch module is respectively and electrically connected with the inversion module, the charge-discharge control module, the inversion control module and the load;
the first switch module is configured to interact with the power grid when receiving a first switch signal;
the second switch module is configured to supply power to the load when receiving a second switch signal;
the inversion control module is further configured to generate the first switching signal and/or the second switching signal according to a remote control signal.
In another possible implementation manner of the first aspect, the power output module further includes a third filtering module and a fourth filtering module;
the third filtering module is respectively and electrically connected with the inversion module and the power grid; the fourth filtering module is respectively and electrically connected with the inversion module and the load;
the third filtering module is configured to filter alternating current flowing in two directions when the power grid is accessed;
the fourth filtering module is configured to filter alternating current flowing through when the load is connected.
In another possible implementation manner of the first aspect, the hybrid light storage inverter further includes a leakage protection module;
the electric leakage protection module is respectively and electrically connected with the inversion module, the charge-discharge control module and the inversion control module;
the leakage protection module is configured to be turned off when a leakage protection signal is received and the flowing leakage current exceeds a preset leakage current;
the inversion control module is further configured to generate the leakage protection signal according to a remote control signal.
In another possible implementation manner of the first aspect, the first optical energy dc conversion module includes a first maximum power point tracking dc-dc converter, and the second optical energy dc conversion module includes a second maximum power point tracking dc-dc converter.
In a second aspect, an embodiment of the present application provides a control method based on the hybrid light storage inverter, where the charge-discharge control module includes an inversion control function of the inversion control module, and the inversion control module includes a charge-discharge control function of the charge-discharge control module; the method comprises the following steps:
detecting the running states of the charge and discharge control module and the inversion control module in real time;
when the inversion control module fails, the charge and discharge control module performs the inversion control function;
when the charge and discharge control module fails, the inversion control module performs the charge and discharge control function.
In a third aspect, an embodiment of the present application provides a photovoltaic energy storage system, including the hybrid photovoltaic inverter.
In the embodiment of the application, when the energy supply ends of the first light energy direct current conversion module and the second light energy direct current conversion module are all connected to the photovoltaic module, all connected to the energy storage equipment or simultaneously connected to the photovoltaic module and the energy storage equipment, the direct current of the power supply end can be converted into alternating current, and the direct current of the preset voltage is converted into alternating current through the inversion module for a user to use, so that when facing various application scenes, different inverters are not required to be replaced, and the use is convenient and the cost is lower.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a first structure of a hybrid light storage inverter according to an embodiment of the present application;
fig. 2 is a schematic diagram of a second structure of a hybrid light storage inverter according to an embodiment of the present application;
fig. 3 is a flowchart of a control method of a hybrid light storage inverter according to an embodiment of the present application.
Reference numerals illustrate:
the system comprises a 10-hybrid light storage inverter, a 101-first light energy direct current conversion module, a 102-second light energy direct current conversion module, a 103-inversion module, a 104-charge and discharge control module, a 105-inversion control module, a 106-main control module, a 107-first filtering module, a 108-second filtering module, a 109-electric energy output module, a 1091-first switching module, a 1092-second switching module, a 1093-third filtering module, a 1094-fourth filtering module, a 1010-electric leakage protection module, a 11-first photovoltaic module/first energy storage device, a 12-second photovoltaic module/second energy storage device, a 13-power grid and a 14-load.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the 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 for purposes of illustration only and are not intended to limit the scope of the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
Illustratively, the present application provides a photovoltaic energy storage system in which dc electrical energy at an energy supply end is typically converted to ac electrical energy by an inverter. Meanwhile, the inverter generally adopts a photovoltaic inverter, a light storage inverter or an energy storage inverter according to actual application requirements. For example, when the energy supply terminals are all connected with the photovoltaic module, the photovoltaic inverter is mainly used for converting the electric energy converted by the photovoltaic module into alternating current and then supplying the alternating current to the load. When the energy supply ends are all connected with the energy storage equipment, the energy storage inverter is mainly used for converting the electric energy stored by the energy storage equipment into alternating current and then supplying the alternating current to a load. When the energy supply end is connected with the photovoltaic module and the energy storage equipment simultaneously, the light storage inverter is adopted, and is mainly used for converting electric energy converted by the photovoltaic module and electric energy stored by the energy storage equipment into alternating current and then supplying the alternating current to a load, so that a user needs to replace different inverters according to application scenes, the types of the inverters are more, and the use is inconvenient and the cost is higher.
Therefore, the application provides the hybrid light storage inverter, when the energy supply ends of the first light energy direct current conversion module and the second light energy direct current conversion module are all connected to the photovoltaic module, all connected to the energy storage equipment or both connected to the photovoltaic module and the energy storage equipment, the direct current of the power supply end can be converted into alternating current, and the direct current of the preset voltage is converted into alternating current through the inversion module for users to use, so that when facing various application scenes, different inverters are not required to be replaced, and the hybrid light storage inverter is convenient to use and low in cost.
The hybrid light storage inverter provided by the application is exemplarily described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a first structure of a hybrid light storage inverter according to an embodiment of the present application. As shown in fig. 1, an exemplary hybrid light storage inverter 10 includes a first light energy dc conversion module 101, a second light energy dc conversion module 102, an inverter module 103, a charge-discharge control module 104, and an inverter control module 105. The inversion module 103 is electrically connected with the first light energy direct current conversion module 101, the second light energy direct current conversion module 102, the charge-discharge control module 104 and the inversion control module 105 respectively, the first light energy direct current conversion module 101 is also electrically connected with the charge-discharge control module 104 and the inversion control module 105 respectively, and the second light energy direct current conversion module 102 is also electrically connected with the charge-discharge control module 104 and the inversion control module 105 respectively. The first photovoltaic module/first energy storage device 11 can be further connected to the first photovoltaic module 101, and the second photovoltaic module/second energy storage device 12 can be further connected to the second photovoltaic module 102.
The first light energy dc conversion module 101 is configured to convert the first energy supply end dc to dc with a preset voltage according to the first light energy conversion signal or the first energy storage conversion signal.
The second light energy dc conversion module 102 is configured to convert the second energy supply end dc power into a dc power with a preset voltage according to the second light energy conversion signal or the second energy storage conversion signal.
The inverter module 103 is configured to convert the direct current of the preset voltage into alternating current according to the inverter signal.
The charge-discharge control module 104 is configured to generate a first light energy conversion signal when the direct current conversion signal is received and the first light energy direct current conversion module 101 is connected to the first photovoltaic module, or generate a first energy storage conversion signal when the first light energy direct current conversion module 101 is connected to the first energy storage device; and/or generating a second light energy conversion signal when the direct current conversion signal is received and the second light energy direct current conversion module 102 is connected to the second photovoltaic module, or generating a second energy storage conversion signal when the second light energy direct current conversion module 102 is connected to the second energy storage device.
The inversion control module 105 is configured to output an inversion signal when receiving a direct current inversion signal and the inversion module 103 accesses a direct current of a preset voltage.
In an embodiment of the present application, the hybrid light storage inverter 10 may have the following various operation modes:
first mode of operation (i.e., photovoltaic inverter): the first light energy direct current conversion module 101 is connected to the first photovoltaic module, and the second light energy direct current conversion module 102 is connected to the second photovoltaic module. The charge-discharge control module 104 is configured to generate a first light energy conversion signal when a dc conversion signal is received and the first light energy dc conversion module 101 is connected to the first photovoltaic module, and/or generate a second light energy conversion signal when a dc conversion signal is received and the second light energy dc conversion module 102 is connected to the second photovoltaic module, where the first light energy dc conversion module 101 is configured to convert the first energy supply end dc into a dc with a preset voltage according to the first light energy conversion signal, and the second light energy dc conversion module 102 is configured to convert the second energy supply end dc into a dc with a preset voltage according to the second light energy conversion signal. For example, 550V dc power input by the photovoltaic module may be converted into 380V dc power. The inversion control module 105 is configured to output an inversion signal when receiving a dc inversion signal and the inversion module 103 accesses a dc of a preset voltage. The inverter module 103 is configured to convert the dc power of the preset voltage into ac power according to the inverter signal, so as to be used by a user.
Second mode of operation (i.e., energy storage inverter): the first light energy direct current conversion module 101 is connected to the first energy storage device, and the second light energy direct current conversion module 102 is connected to the second energy storage device. The charge-discharge control module 104 is configured to generate a first energy storage conversion signal when a dc conversion signal is received and the first light energy dc conversion module 101 is connected to the first energy storage device, and/or generate a second energy storage conversion signal when a dc conversion signal is received and the second light energy dc conversion module 102 is connected to the second energy storage device, where the first light energy dc conversion module 101 is configured to convert the first energy supply end dc into a dc with a preset voltage according to the first energy storage conversion signal, and the second light energy dc conversion module 102 is configured to convert the second energy supply end dc into a dc with a preset voltage according to the second energy storage conversion signal. The inversion control module 105 is configured to output an inversion signal when receiving a dc inversion signal and the inversion module 103 accesses a dc of a preset voltage. The inverter module 103 is configured to convert the dc power of the preset voltage into ac power according to the inverter signal, so as to be used by a user.
Third mode of operation (i.e., light storage inverter): the first light energy direct current conversion module 101 is connected to the first photovoltaic module, and the second light energy direct current conversion module 102 is connected to the second energy storage device. The charge-discharge control module 104 is configured to generate a first light energy conversion signal when a dc conversion signal is received and the first light energy dc conversion module 101 is connected to the first photovoltaic module, and/or generate a second energy storage conversion signal when a dc conversion signal is received and the second light energy dc conversion module 102 is connected to the second energy storage device, where the first light energy dc conversion module 101 is configured to convert the first energy supply end dc into a dc with a preset voltage according to the first light energy conversion signal, and the second light energy dc conversion module 102 is configured to convert the second energy supply end dc into a dc with a preset voltage according to the second energy storage conversion signal. The inversion control module 105 is configured to output an inversion signal when receiving a dc inversion signal and the inversion module 103 accesses a dc of a preset voltage. The inverter module 103 is configured to convert the dc power of the preset voltage into ac power according to the inverter signal, so as to be used by a user. With the light storage inverter, solar energy can be converted into alternating current energy and the energy stored in a battery to provide emergency power or feed into a public power grid when the power grid is available.
In the embodiment of the application, the hybrid light storage inverter can directly convert direct current at a power supply end into alternating current when facing various application scenes, namely the power supply end is connected into a photovoltaic module, is connected into an energy storage device or is connected into the photovoltaic module and the energy storage device simultaneously, and can realize the mutual conversion between a photovoltaic inverter, a light storage inverter and the energy storage inverter without replacing the inverter by a user, and the three functions are integrated, and the specific working mode depends on photovoltaic energy and user preference, for example, when illumination is strong, or the user wants to convert light energy into alternating current and supply the alternating current to a power grid or a load, the photovoltaic inverter or the light storage inverter can be adopted, and when illumination is weak or the user wants to supply the electric energy stored by the energy storage device to the power grid or the load, the energy storage inverter can be adopted; the whole mixed light storage inverter is convenient to use and low in cost. Meanwhile, when the energy supply ends of the hybrid light storage inverter are all connected with energy storage equipment (such as batteries), one-cluster management of the batteries can be realized, and the service life and the utilization rate of the energy storage equipment are effectively prolonged. The photovoltaic module can be a solar photovoltaic panel, and the energy storage device can be a battery. The number of input ports of inverter module 103 may be plural, and typically less than 20.
Illustratively, the first optical energy dc conversion module 101 includes a first maximum power point tracking dc-dc converter and the second optical energy dc conversion module 102 includes a second maximum power point tracking dc-dc converter.
In the embodiment of the present application, the first light energy DC conversion module 101 may use a first maximum power point tracking (Maximum Power Point Tracking, MPPT) DC-DC converter (DC-DC converter), so that the direct current provided by the energy supply end may be converted into the direct current of the preset voltage no matter the first light energy DC conversion module 101 is connected to the first photovoltaic module or the first energy storage device. The second light energy dc conversion module 102 may use a second maximum power point tracking dc-dc converter, so that no matter the second light energy dc conversion module 102 is connected to the second photovoltaic module or the second energy storage device, the dc power provided by the energy supply end may be converted into dc power with a preset voltage.
Fig. 2 is a schematic diagram of a second structure of a hybrid light storage inverter according to an embodiment of the application. As shown in fig. 2, the hybrid light storage inverter 10 further illustratively includes a master control module 106; the main control module 106 is electrically connected with the charge and discharge control module 104 and the inversion control module 105, respectively.
The main control module 106 is configured to generate a direct current conversion signal and a direct current inversion signal according to the remote control signal.
In this embodiment of the present application, the main control module 106 may be wirelessly connected to a remote cloud platform or an Application (APP), and is configured to generate a dc conversion signal according to a remote control signal of the remote cloud platform or the APP, and send the dc conversion signal to the first optical dc conversion module 101 and/or the second optical dc conversion module 102 to perform dc-dc conversion. And the system is also used for generating a direct current inversion signal according to a remote control signal of the remote cloud platform or the APP and sending the direct current inversion signal to the inversion module 103 for direct current-alternating current conversion. The main control module 106 may also be electrically connected to a liquid crystal display (Liquid Crystal Display, LCD) for displaying the processing of the entire hybrid light storage inverter 10.
As shown in fig. 2, the hybrid light storage inverter 10 further includes a first filtering module 107 and a second filtering module 108, exemplarily; the first filter module 107 is electrically connected to the first optical dc-dc conversion module 101, and the second filter module 108 is electrically connected to the second optical dc-dc conversion module 102.
The first filtering module 107 is configured to filter the first energy supply end direct current when the first photovoltaic module or the first energy storage device is connected.
The second filtering module 108 is configured to filter the second energy supply end direct current when the second photovoltaic module or the second energy storage device is connected.
In the embodiment of the present application, the first filtering module 107 is configured to perform dc filtering on the dc power provided by the first energy supply end (i.e., the first photovoltaic module or the first energy storage device) when the first photovoltaic module or the first energy storage device is connected, so that the first light energy dc conversion module 101 is used. The second filtering module 108 is configured to perform dc filtering on the dc power provided by the second energy supply end (i.e., the second photovoltaic module or the second energy storage device) when the second photovoltaic module or the second energy storage device is connected, so that the second light energy dc conversion module 102 is used.
As shown in fig. 2, the hybrid light storage inverter 10 further illustratively includes an electrical energy output module 109; the power output module 109 is electrically connected to the inverter module 103, the charge/discharge control module 104, and the inverter control module 105, respectively.
The power output module 109 is configured to output an alternating current when receiving the power output signal.
The inverter control module 105 is further configured to generate a power output signal based on the remote control signal.
In the embodiment of the present application, the inverter control module 105 is configured to generate an electrical energy output signal according to the remote control signal, and when the inverter module 103 converts a dc power of a preset voltage into an ac power and sends the ac power to the electrical energy output module 109, the electrical energy output module 109 is configured to output the ac power to a power grid or a load when receiving the electrical energy output signal.
As shown in fig. 2, the power output module 109 illustratively includes a first switch module 1091 and a second switch module 1092; the first switch module 1091 is electrically connected with the inverter module 103, the charge-discharge control module 104, the inverter control module 105 and the power grid 13 respectively; the second switching module 1092 is electrically connected to the inverter module 103, the charge/discharge control module 104, the inverter control module 105, and the load 14, respectively.
The first switching module 1091 is configured to interact with the power grid 13 when receiving the first switching signal.
The second switching module 1092 is configured to supply power to the load 14 when a second switching signal is received.
The inverter control module 105 is further configured to generate the first switching signal and/or the second switching signal according to the remote control signal.
In the embodiment of the present application, the inverter control module 105 is configured to generate the first switching signal and/or the second switching signal according to the remote control signal, where the first switching module 1091 is configured to interact with the power grid 13 when receiving the first switching signal, that is, send the ac power generated by the hybrid light-storage inverter to the power grid, so that the power grid supplies other users, or receive the power sent by the power grid for the load 14 of the user. The second switch module 1092 is configured to supply power to the load 14 for use by the user's own load 14 when receiving the second switch signal. Wherein, the first switch module 1091 and the second switch module 1092 may be relays.
As shown in fig. 2, the power output module 109 further illustratively includes a third filter module 1093 and a fourth filter module 1094; the third filtering module 1093 is electrically connected with the inverter module 103 and the power grid 13 respectively; the fourth filter module 1094 is electrically connected to the inverter module 103 and the load 14, respectively.
The third filtering module 1093 is configured to filter alternating current flowing in both directions when accessing the power grid 13.
A fourth filtering module 1094 is configured to filter alternating current flowing through when the load 14 is accessed.
In the embodiment of the present application, the third filtering module 1093 is configured to filter the ac power flowing in two directions when the power grid 13 is connected, that is, to filter the ac power flowing to the power grid and to filter the ac power flowing from the power grid. The fourth filtering module 1094 is configured to filter ac power flowing through the load 14 when the load 14 is connected, i.e., primarily ac power flowing through the load 14.
As shown in fig. 2, the hybrid light storage inverter 10 also illustratively includes a leakage protection module 1010; the leakage protection module 1010 is electrically connected to the inverter module 103, the charge/discharge control module 104, and the inverter control module 105, respectively.
The leakage protection module 1010 is configured to turn off when the leakage protection signal is received and the leakage current flowing through exceeds a preset leakage current.
The inverter control module 105 is further configured to generate a leakage protection signal according to the remote control signal.
In the embodiment of the present application, the inverter control module 105 is configured to generate a leakage protection signal according to a remote control signal, and the leakage protection module 1010 is configured to turn off when the leakage protection signal is received and the flowing leakage current exceeds a preset leakage current, that is, when the flowing current of the hybrid light storage inverter 10 fails in a leakage manner, the leakage protection module 1010 is used to perform forced cutoff, so as to prevent the leakage current from damaging electronic devices in the hybrid light storage inverter 10. The leakage protection module 1010 may be a ground fault current leakage protector.
Fig. 3 is a flowchart of a control method of a hybrid light storage inverter according to an embodiment of the present application. As shown in fig. 3, by way of example, a control method based on a hybrid light storage inverter, the charge-discharge control module 104 includes an inversion control function of the inversion control module 105, and the inversion control module 105 includes a charge-discharge control function of the charge-discharge control module 104; the method comprises the following steps:
detecting the running states of the charge and discharge control module 104 and the inversion control module 105 in real time; when the inversion control module 105 fails, the charge and discharge control module 104 performs an inversion control function; when the charge and discharge control module 104 fails, the inverter control module 105 performs a charge and discharge control function.
In the embodiment of the present application, the hybrid light storage inverter 10 at least includes a charge-discharge control module 104 and an inverter control module 105, where the charge-discharge control module 104 includes an inverter control function of the inverter control module 105, and the inverter control module 105 includes a charge-discharge control function of the charge-discharge control module 104, so that when both the charge-discharge control module 104 and the inverter control module 105 work normally, the charge-discharge control module 104 and the inverter control module 105 perform respective main functions and operate independently. When one of the charge and discharge control module 104 and the inverter control module 105 fails, the other may replace the main control function of the failed module. That is, when the inverter control module 105 fails, the charge and discharge control module 104 may replace the inverter control function of the inverter control module 105; when the charge-discharge control module 104 fails, the inversion control module 105 can replace the charge-discharge control function of the charge-discharge control module 104, so that the charge-discharge control module 104 and the inversion control module 105 can operate independently and complement each other, and the operation of the whole hybrid light storage inverter 10 is more stable and reliable. The charge-discharge control function mainly comprises the steps of generating a first light energy conversion signal when a direct current conversion signal is received and the first light energy direct current conversion module 101 is connected to a first photovoltaic module, or generating a first energy storage conversion signal when the first light energy direct current conversion module 101 is connected to first energy storage equipment; and/or generating a second light energy conversion signal when the direct current conversion signal is received and the second light energy direct current conversion module 102 is connected to the second photovoltaic module, or generating a second energy storage conversion signal when the second light energy direct current conversion module 102 is connected to the second energy storage device. The inversion control function mainly includes outputting an inversion signal when receiving a direct current inversion signal and the inversion module 103 accesses a direct current of a preset voltage.
In the embodiment of the application, the method specifically comprises the following steps:
s301, detecting the operation states of the charge/discharge control module 104 and the inversion control module 105 in real time.
S302, judging whether the inversion control module 105 is faulty, if yes, the charge and discharge control module 104 performs the inversion control function, otherwise, S303 is performed.
S303, judging whether the charge and discharge control module 104 is faulty, if yes, the inversion control module 105 performs the charge and discharge control function, otherwise, returning to S301.
Illustratively, embodiments of the present application provide a photovoltaic energy storage system including a hybrid light storage inverter 10.
In the embodiment of the application, the hybrid light storage inverter 10 is arranged inside the photovoltaic energy storage system, when the energy supply ends of the first light energy direct current conversion module and the second light energy direct current conversion module are all connected into the photovoltaic assembly, all connected into the energy storage equipment or both connected into the photovoltaic assembly and the energy storage equipment, the direct current of the power supply end can be converted into alternating current, and the direct current of the preset voltage is converted into the alternating current through the inverter module for users to use, so that when facing various application scenes, different inverters are not required to be replaced, and the hybrid light storage inverter is convenient to use and low in cost.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present application.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the photovoltaic energy storage system may refer to the corresponding process in the foregoing embodiment, which is not described herein.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the elements of the examples described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or as a combination of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided herein, it should be understood that the disclosed hybrid light storage inverter may be implemented in other ways. For example, the hybrid photovoltaic inverter embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another photovoltaic energy storage system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some multi-interface photovoltaic energy storage system, indirect coupling or communication connection of devices or units, electrical, mechanical, or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (10)

1. The hybrid light storage inverter is characterized by comprising a first light energy direct current conversion module, a second light energy direct current conversion module, an inversion module, a charge-discharge control module and an inversion control module;
the inversion module is respectively and electrically connected with the first light energy direct current conversion module, the second light energy direct current conversion module, the charge and discharge control module and the inversion control module, the first light energy direct current conversion module is also respectively and electrically connected with the charge and discharge control module and the inversion control module, and the second light energy direct current conversion module is also respectively and electrically connected with the charge and discharge control module and the inversion control module;
the first light energy direct current conversion module is configured to convert the direct current of the first energy supply end into the direct current of the preset voltage according to the first light energy conversion signal or the first energy storage conversion signal;
the second light energy direct current conversion module is configured to convert direct current of a second energy supply end into direct current of the preset voltage according to a second light energy conversion signal or a second energy storage conversion signal;
the inversion module is configured to convert the direct current of the preset voltage into alternating current according to an inversion signal;
the charge-discharge control module is configured to generate the first light energy conversion signal when a direct current conversion signal is received and the first light energy direct current conversion module is connected with a first photovoltaic module, or generate the first energy storage conversion signal when the first light energy direct current conversion module is connected with first energy storage equipment;
and/or generating the second light energy conversion signal when a direct current conversion signal is received and the second light energy direct current conversion module is connected to a second photovoltaic module, or generating the second energy storage conversion signal when the second light energy direct current conversion module is connected to a second energy storage device;
the inversion control module is configured to output the inversion signal when receiving the direct current inversion signal and the inversion module accesses the direct current of the preset voltage.
2. The hybrid light storage inverter of claim 1, further comprising a master control module;
the main control module is respectively and electrically connected with the charge and discharge control module and the inversion control module;
the main control module is configured to generate the direct current conversion signal and the direct current inversion signal according to a remote control signal.
3. The hybrid light storage inverter of claim 1, further comprising a first filtering module and a second filtering module;
the first filtering module is electrically connected with the first light energy direct current conversion module, and the second filtering module is electrically connected with the second light energy direct current conversion module;
the first filtering module is configured to filter the first energy supply end direct current when the first photovoltaic module or the first energy storage device is connected;
the second filtering module is configured to filter the second energy supply end direct current when the second photovoltaic module or the second energy storage device is connected.
4. The hybrid light storage inverter of claim 1, further comprising an electrical energy output module;
the electric energy output module is respectively and electrically connected with the inversion module, the charge-discharge control module and the inversion control module;
the power output module is configured to output the alternating current when receiving a power output signal;
the inverter control module is further configured to generate the power output signal based on a remote control signal.
5. The hybrid light storage inverter of claim 4, wherein the power output module comprises a first switch module and a second switch module;
the first switch module is respectively and electrically connected with the inversion module, the charge-discharge control module, the inversion control module and the power grid; the second switch module is respectively and electrically connected with the inversion module, the charge-discharge control module, the inversion control module and the load;
the first switch module is configured to interact with the power grid when receiving a first switch signal;
the second switch module is configured to supply power to the load when receiving a second switch signal;
the inversion control module is further configured to generate the first switching signal and/or the second switching signal according to a remote control signal.
6. The hybrid light storage inverter of claim 4, wherein the power output module further comprises a third filter module and a fourth filter module;
the third filtering module is respectively and electrically connected with the inversion module and the power grid; the fourth filtering module is respectively and electrically connected with the inversion module and the load;
the third filtering module is configured to filter alternating current flowing in two directions when the power grid is accessed;
the fourth filtering module is configured to filter alternating current flowing through when the load is connected.
7. The hybrid light storage inverter of claim 1, further comprising a leakage protection module;
the electric leakage protection module is respectively and electrically connected with the inversion module, the charge-discharge control module and the inversion control module;
the leakage protection module is configured to be turned off when a leakage protection signal is received and the flowing leakage current exceeds a preset leakage current;
the inversion control module is further configured to generate the leakage protection signal according to a remote control signal.
8. The hybrid light storage inverter of any of claims 1-7, wherein the first light energy dc conversion module comprises a first maximum power point tracking dc-dc converter and the second light energy dc conversion module comprises a second maximum power point tracking dc-dc converter.
9. A control method based on the hybrid light storage inverter of any one of claims 1 to 8, wherein the charge-discharge control module includes an inversion control function of the inversion control module, and the inversion control module includes a charge-discharge control function of the charge-discharge control module; the method comprises the following steps:
detecting the running states of the charge and discharge control module and the inversion control module in real time;
when the inversion control module fails, the charge and discharge control module performs the inversion control function;
when the charge and discharge control module fails, the inversion control module performs the charge and discharge control function.
10. A photovoltaic energy storage system comprising a hybrid photovoltaic inverter as claimed in any one of claims 1 to 8.
CN202310390983.3A 2023-04-12 2023-04-12 Hybrid light storage inverter, control method and photovoltaic energy storage system Pending CN116581812A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310390983.3A CN116581812A (en) 2023-04-12 2023-04-12 Hybrid light storage inverter, control method and photovoltaic energy storage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310390983.3A CN116581812A (en) 2023-04-12 2023-04-12 Hybrid light storage inverter, control method and photovoltaic energy storage system

Publications (1)

Publication Number Publication Date
CN116581812A true CN116581812A (en) 2023-08-11

Family

ID=87534915

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310390983.3A Pending CN116581812A (en) 2023-04-12 2023-04-12 Hybrid light storage inverter, control method and photovoltaic energy storage system

Country Status (1)

Country Link
CN (1) CN116581812A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112769161A (en) * 2021-01-22 2021-05-07 国网(北京)综合能源规划设计研究院有限公司 Multi-mode energy storage micro-grid system
CN215378469U (en) * 2021-07-15 2021-12-31 浙江朗呈新能源有限公司 Allotment stable type hybrid energy storage photovoltaic power generation system
CN114977193A (en) * 2022-06-11 2022-08-30 安徽睿源能源科技有限公司 Modular optical storage integrated converter system topology structure and control strategy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112769161A (en) * 2021-01-22 2021-05-07 国网(北京)综合能源规划设计研究院有限公司 Multi-mode energy storage micro-grid system
CN215378469U (en) * 2021-07-15 2021-12-31 浙江朗呈新能源有限公司 Allotment stable type hybrid energy storage photovoltaic power generation system
CN114977193A (en) * 2022-06-11 2022-08-30 安徽睿源能源科技有限公司 Modular optical storage integrated converter system topology structure and control strategy

Similar Documents

Publication Publication Date Title
CN103178553B (en) A kind of family expenses mixed power supply system
ES2741429T3 (en) Electrical supply system with integration of wind energy, solar energy, diesel fuel generator and grid supply
KR101147206B1 (en) Grid connected power storage system and integration controller thereof
KR101369633B1 (en) Energy storage system and method of controlling the same
CN104065157A (en) Uninterruptible power supply with improved power supply reliability
US20220200314A1 (en) Energy storage system
CN103595071A (en) Energy system of micro-grid
KR101193174B1 (en) Battery pack
KR20140040627A (en) Battery system, and energy storage system including the same
CN104038150A (en) Modularized and centralized type photovoltaic power generation interface unit
WO2024041383A1 (en) Energy storage system and power supply control method for battery management system
CN117220323B (en) Method and device for controlling network connection and disconnection
TW201407332A (en) Uninterruptible power system and method of operating the same
CN211480938U (en) RACK module and application system thereof
US11031808B2 (en) Power supply system
CN110943476A (en) Multi-stage UPS parallel distributed control system and wiring circuit thereof
CN203151120U (en) Household hybrid power supply system
KR20140013553A (en) Hybrid photovoltaic system
CN116581812A (en) Hybrid light storage inverter, control method and photovoltaic energy storage system
CN112838608A (en) Energy storage system
CN112398155A (en) Data center power supply system based on three-station-in-one
CN113437790A (en) Photovoltaic energy storage power generation equipment and control method thereof
CN219576654U (en) Micro-grid circuit system sharing battery and energy storage equipment
CN217545665U (en) AC and circuit UPS device for SVC operation
CN217983538U (en) Lithium battery module, lithium battery backup power supply system and outdoor communication cabinet

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