CN117134486B - Method and system for changing power of micro inverter - Google Patents
Method and system for changing power of micro inverter Download PDFInfo
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- CN117134486B CN117134486B CN202310874642.3A CN202310874642A CN117134486B CN 117134486 B CN117134486 B CN 117134486B CN 202310874642 A CN202310874642 A CN 202310874642A CN 117134486 B CN117134486 B CN 117134486B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 15
- 230000004044 response Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
-
- 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
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
-
- 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
- H02J2213/00—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network
- H02J2213/10—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network using simultaneously two or more different transmission means
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a method and a system for changing the power of a micro inverter, wherein the method comprises the following steps: step 1: the user selects the power to be set on the control software of the upper computer according to the need and sends a power setting instruction to the micro inverter; step 2: after receiving the power setting instruction, the micro inverter analyzes the power setting instruction by the secondary side and transmits the analyzed rated power data to the primary side through serial port communication; step 3: and after receiving the rated power data, the primary side adjusts the power output and updates the threshold value of the rated power. The invention can adjust the power of the micro-inverter after the micro-inverter leaves the factory, and gives consideration to the safety of products, can flexibly adapt to national safety regulations, and provides more convenience for customers.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a method and a system for changing the power of a micro inverter.
Background
The micro inverter is also called a power regulator and a power regulator, and is an indispensable part of a photovoltaic system. The photovoltaic inverter has the main function of converting direct current generated by the solar panel into alternating current used by household appliances, and all the electricity generated by the solar panel can be output through the inverter.
The rated power of the hardware of the traditional micro inverter is fixed after leaving the factory, the power cannot be adjusted, and the application requirements of the solar photovoltaic modules adapting to different powers cannot be met.
Therefore, how to adjust the power of the micro-inverter after the micro-inverter leaves the factory is a problem that needs to be solved at present.
Disclosure of Invention
The invention aims to provide a method and a system for changing the power of a micro-inverter, which can adjust the power of the micro-inverter after the micro-inverter leaves a factory.
In order to achieve the above object, the present invention provides a method of varying power of a micro inverter, comprising:
Step 1: the user selects the power to be set on the control software of the upper computer according to the need and sends a power setting instruction to the micro inverter;
Step 2: after receiving the power setting instruction, the micro inverter analyzes the power setting instruction by the secondary side and transmits the analyzed rated power data to the primary side through serial port communication;
Step 3: and after receiving the rated power data, the primary side adjusts the power output and updates the threshold value of the rated power.
In an alternative, the step 3 includes: and after the primary side receives the rated power data, performing power comparison, and when the rated power data is inconsistent with the original power, changing the switching time of the primary side drive by modifying the on duty ratio of the switching tube by the primary side, and further changing the primary side detection current so as to realize the adjustment of the power.
In an alternative, the step 1 includes: the upper computer sends a power setting instruction to the collector through the serial port line, the collector converts the power setting instruction into a data instruction capable of being transmitted on the power line, and the data instruction is sent to the micro inverter through the power line based on the power carrier chip.
In an alternative scheme, the data instruction comprises a power zone bit and a power size to be set, after the secondary side analyzes the data instruction to obtain the power zone bit, the original fixed power judgment is abandoned, and the analyzed rated power data is directly transmitted to the primary side through serial port communication.
In an alternative scheme, after the power adjustment of the micro inverter is successful, the response data frame is returned to the upper computer according to a communication original path.
In an alternative, the standard power of the micro-inverter is greater than the regulated power.
The invention also provides a system for changing the power of the micro-inverter, which is used for realizing the method, and comprises the following steps:
the upper computer is internally provided with control software;
The collector is in communication connection with the upper computer through a serial port line;
And the micro inverter is in communication connection with the collector through a power line.
The invention has the beneficial effects that:
The invention can adjust the power of the micro-inverter after the micro-inverter leaves the factory, and gives consideration to the safety of products, can flexibly adapt to national safety regulations, and provides more convenience for customers.
Can be applicable to the solar photovoltaic module of different power according to market and customer's demand, use multiple scene, the practicality is strong.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
Fig. 1 is a flowchart of a method for changing power of a micro-inverter according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the specific examples. The advantages and features of the present invention will become more apparent from the following description and drawings, however, it should be understood that the inventive concept may be embodied in many different forms and is not limited to the specific embodiments set forth herein. The drawings are in a very simplified form and are to non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
It will be understood that when an element or layer is referred to as being "on," "adjacent," "connected to," or "coupled to" another element or layer, it can be directly on, adjacent, connected, or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.
Spatially relative terms, such as "under," "below," "beneath," "under," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "below" and "under" may include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
Example 1
Referring to fig. 1, the present embodiment provides a method for changing the power of a micro-inverter, including:
Step 1: the user selects the power to be set on the control software of the upper computer according to the need and sends a power setting instruction to the micro inverter;
Step 2: after receiving the power setting instruction, the micro inverter analyzes the power setting instruction by the secondary side and transmits the analyzed rated power data to the primary side through serial port communication;
Step 3: and after receiving the rated power data, the primary side adjusts the power output and updates the threshold value of the rated power.
Specifically, the present method is described below with a specific example.
1. And selecting the power to be set on the upper computer of the PC side according to the actual needs of the user.
And 2, the PC end transmits a power setting instruction through the RS485 serial port line and a collector using a specific program, wherein the specific program is equivalent to a data instruction which can be transmitted on a power line by converting the serial port data instruction.
3. After the collector receives the data instruction, the data instruction is transmitted to the micro inverter through the power line by using the power carrier chip. The data command sent by the collector comprises a special power flag bit and the power to be set.
4. And after receiving the data instruction, the micro inverter. The secondary side program analyzes the data command to obtain a special power flag bit, then discards the original fixed power judgment, and directly transmits the analyzed rated power data to the primary side through serial port communication.
5. The primary program can adjust the relevant output of the power in time after receiving the power setting, and update the threshold value of the rated power. Specifically, when the primary program receives the set power value, the set power value is compared with the original power. When the set power is different from the original power, the primary side modifies the on duty ratio of the switching tube by increasing or decreasing the power value (the technical content of modifying the duty ratio by increasing or decreasing the power value belongs to the prior art, and the principle thereof is not repeated here). When the duty cycle is modified, the switching time of the primary drive is modified. When the switching time of the driving is changed, the current detected by the primary side is increased or decreased, so that the power can be changed, and the change of the power is realized.
6. After the micro inverter is successfully set, the response data frame is returned to the upper computer from the original communication channel.
The embodiment can adjust the power of the micro-inverter after leaving the factory, gives consideration to the safety of products, can flexibly adapt to national safety regulations, and provides more convenience for customers. Can be applicable to the solar photovoltaic module of different power according to market and customer's demand, use multiple scene, the practicality is strong.
The method can enable the rated power of the micro inverter to be switched between 800/720/600, and the 800W hardware standard is selected for downward compatibility to ensure the safety, so that the product has higher safety, can be flexibly adapted to the national safety specification, and provides more convenience for customers.
Example 2
The present embodiment provides a system for changing power of a micro inverter, for implementing the method described above, the system including:
the upper computer is internally provided with control software;
The collector is in communication connection with the upper computer through a serial port line;
And the micro inverter is in communication connection with the collector through a power line.
A method of changing a micro inverter using the present system is referred to embodiment 1.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (3)
1. A method of varying power of a micro-inverter, comprising:
Step 1: the user selects the power to be set on the control software of the upper computer according to the need; the upper computer sends a power setting instruction to the collector through a serial port line, the collector converts the power setting instruction into a data instruction capable of being transmitted on a power line, and the data instruction is sent to the micro inverter through a power line based on a power carrier chip;
Step 2: after the micro inverter receives the data instruction, the secondary side analyzes the data instruction; the data instruction comprises a power zone bit and the power to be set, and after the secondary side analyzes the data instruction to obtain the power zone bit, the original fixed power judgment is abandoned, and the analyzed rated power data is directly transmitted to the primary side through serial port communication;
step 3: the primary side adjusts power output after receiving the rated power data and updates a threshold value of rated power;
The step 3 comprises the following steps:
After the primary side receives the rated power data, performing power comparison, and when the rated power data is inconsistent with the original power, changing the switching time of primary side driving by modifying the on duty ratio of a switching tube by the primary side, and further changing the primary side detection current to realize power adjustment;
The standard power of the micro inverter is greater than the adjusted power.
2. The method of varying the power of a microinverter of claim 1 wherein after successful power adjustment of the microinverter, a response data frame is returned to the host computer in a communication path.
3. A system for varying micro-inverter power, for implementing the method of any of claims 1-2, the system comprising:
the upper computer is internally provided with control software;
The collector is in communication connection with the upper computer through a serial port line;
And the micro inverter is in communication connection with the collector through a power line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310874642.3A CN117134486B (en) | 2023-07-17 | 2023-07-17 | Method and system for changing power of micro inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310874642.3A CN117134486B (en) | 2023-07-17 | 2023-07-17 | Method and system for changing power of micro inverter |
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| Publication Number | Publication Date |
|---|---|
| CN117134486A CN117134486A (en) | 2023-11-28 |
| CN117134486B true CN117134486B (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310874642.3A Active CN117134486B (en) | 2023-07-17 | 2023-07-17 | Method and system for changing power of micro inverter |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518694A (en) * | 2013-09-26 | 2015-04-15 | 台达电子工业股份有限公司 | Micro inverter of solar power generation system, and operation method thereof |
| CN206149266U (en) * | 2016-11-24 | 2017-05-03 | 江苏通灵电器股份有限公司 | Power line carrier communication system based on micro inverter |
| CN116076009A (en) * | 2020-08-31 | 2023-05-05 | 艾思玛太阳能技术股份公司 | Inverter and method for setting power level of inverter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022047770A1 (en) * | 2020-09-07 | 2022-03-10 | 华为数字能源技术有限公司 | Photovoltaic device, photovoltaic inverter, system, and limited power control method |
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- 2023-07-17 CN CN202310874642.3A patent/CN117134486B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518694A (en) * | 2013-09-26 | 2015-04-15 | 台达电子工业股份有限公司 | Micro inverter of solar power generation system, and operation method thereof |
| CN206149266U (en) * | 2016-11-24 | 2017-05-03 | 江苏通灵电器股份有限公司 | Power line carrier communication system based on micro inverter |
| CN116076009A (en) * | 2020-08-31 | 2023-05-05 | 艾思玛太阳能技术股份公司 | Inverter and method for setting power level of inverter |
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| CN117134486A (en) | 2023-11-28 |
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