CN220653197U - Photovoltaic inverter system and photovoltaic inverter - Google Patents
Photovoltaic inverter system and photovoltaic inverter Download PDFInfo
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- CN220653197U CN220653197U CN202322349540.8U CN202322349540U CN220653197U CN 220653197 U CN220653197 U CN 220653197U CN 202322349540 U CN202322349540 U CN 202322349540U CN 220653197 U CN220653197 U CN 220653197U
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- 238000004891 communication Methods 0.000 claims abstract description 188
- 238000012544 monitoring process Methods 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 238000004146 energy storage Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 230000000151 anti-reflux effect Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Abstract
The utility model discloses a photovoltaic inverter system and a photovoltaic inverter. The photovoltaic inverter system comprises N photovoltaic inverters which are sequentially connected, a communication device is further arranged in a shell of each photovoltaic inverter, and the communication devices are respectively and electrically connected with inverter controllers in the corresponding photovoltaic inverters; each communication device comprises a first communication interface and a second communication interface, the first communication interface of any one of the 2 nd to N-1 st photovoltaic inverter is connected to the second communication interface of the communication device of the previous photovoltaic inverter, and the second communication interface is connected to the first communication interface of the communication device of the next photovoltaic inverter. The photovoltaic inverter system reduces the resource scheduling pressure of the inverter controller in the photovoltaic inverter, reduces the communication pressure when a plurality of photovoltaic inverters are connected in parallel, and improves the response speed.
Description
Technical Field
The utility model belongs to the field of photovoltaic inverters, and particularly relates to a photovoltaic inverter system and a photovoltaic inverter.
Background
Photovoltaic solar power generation is more and more common, the use ratio of the photovoltaic inverter is also gradually increased, the communication function of the photovoltaic inverter influences user experience and normal operation of a photovoltaic system, and the use requirements of users on the photovoltaic inverter are also gradually increased. At present, the mainstream photovoltaic inverter, the internal inverter controller is to solve the control problem of the photovoltaic power generation part and to interact with external communication equipment, so that the resource scheduling pressure of the internal inverter controller is larger, and when a plurality of photovoltaic inverters are connected in parallel, the communication pressure of the internal inverter controller is larger, so that the scheduling and response untimely problems are easy to occur.
Disclosure of Invention
In view of the above technical problems, the present utility model provides an improved photovoltaic inverter system and a photovoltaic inverter.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the photovoltaic inverter system comprises N photovoltaic inverters which are connected in sequence, wherein a communication device is further arranged in a shell of each photovoltaic inverter, and the communication devices are respectively and electrically connected with inverter controllers in the corresponding photovoltaic inverters; each of the communication devices includes a first communication interface and a second communication interface, the first communication interface of any one of the 2 nd to N-1 st photovoltaic inverter is connected to the second communication interface of the communication device of the previous photovoltaic inverter, and the second communication interface is connected to the first communication interface of the communication device of the next photovoltaic inverter.
Preferably, the number of the communication devices is N, and one communication device is disposed in the housing of each photovoltaic inverter.
Preferably, the first communication interface or the second communication interface of the communication device in the 1 st photovoltaic inverter is connected to the monitoring apparatus; or the first communication interface or the second communication interface of the communication device in the Nth photovoltaic inverter is connected to the monitoring equipment.
Preferably, each of the communication devices comprises at least a first protocol interface, a second protocol interface and an anti-reflux interface; the communication device is used for being electrically connected with an inverter controller of the photovoltaic inverter through the first protocol interface to transmit first protocol data; the communication device is used for being electrically connected with a remote server through the second protocol interface to transmit second protocol data; the communication device is used for being electrically connected with the electric meter measuring system through the anti-backflow interface so as to transmit anti-backflow detection data.
Further, the first protocol interface is used for carrying out Modbus communication between the communication device and an inverter controller of the photovoltaic inverter, and the first protocol data is Modbus protocol data; the second protocol interface is used for performing the Sunspec communication between the communication device and the remote server, and the second protocol data is Sunspec protocol data.
Further, the electric meter measuring system is a Modbus electric meter measuring system, and the anti-backflow interface is also used for transmitting the generated power data measured by the electric meter measuring system; the second protocol interface and the anti-backflow interface are an RS485 interface or an RS422 interface; the communication device comprises an ARM chip.
Further, the communication device further comprises a debugging interface, and the communication device is used for being electrically connected with external debugging equipment through the debugging interface; the communication device also comprises a USB interface, and is used for storing data through the USB interface and carrying out software upgrading on an inverter controller of the photovoltaic inverter.
Further, the communication device further comprises a control interface, and the communication device is used for being electrically connected with an external controller through the control interface, and the external controller is used for remotely controlling the photovoltaic inverter; the communication device also comprises an alarm interface, and the communication device is used for being electrically connected with the alarm device through the alarm interface.
Further, the communication device further comprises a battery communication interface, wherein the battery communication interface is used for connecting an external energy storage battery; the communication device further comprises an ethernet interface for connecting to a remote router.
The photovoltaic inverter comprises a shell, an inverter controller arranged in the shell, and a communication device of the photovoltaic inverter, wherein the communication device is arranged in the shell.
Compared with the prior art, the utility model has the following advantages:
according to the photovoltaic inverter system, the communication device is arranged in each photovoltaic inverter and is respectively and electrically connected with the inverter controller of the corresponding photovoltaic inverter and the plurality of external devices, so that the inverter controller in the photovoltaic inverter only needs to control the functions in the inverter, and the communication device performs data interaction and external communication, the resource scheduling pressure of the inverter controller in the photovoltaic inverter is reduced, the communication pressure when a plurality of photovoltaic inverters are connected in parallel is also reduced, and the response speed is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a parallel connection of a plurality of photovoltaic inverters according to an embodiment of the present utility model;
fig. 2 is a schematic connection diagram of an inverter controller and a communication device of a photovoltaic inverter according to an embodiment of the present utility model;
the method comprises the following steps of 1, a photovoltaic inverter; 2. an inverter controller; 3. a communication device; 4. monitoring equipment; s1, a debugging interface; s2, an anti-backflow interface; s3, a second protocol interface; s4, a first communication interface; s5, a second communication interface; s6, a first protocol interface; u1, USB interface; c1, a battery communication interface; e1, an Ethernet interface; DI. A control interface; DO, alarm interface.
Detailed Description
Preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, the photovoltaic inverter system in this embodiment includes N photovoltaic inverters 1 connected in sequence, and a communication device 3 is further provided in a housing of each photovoltaic inverter 1. The communication device 3 is electrically connected to the inverter controller 2 of the corresponding photovoltaic inverter 1 and to a plurality of external devices, respectively. Specifically, each communication device 3 includes a first communication interface S4 and a second communication interface S5. The first communication interface S4 of any one of the communication devices 3 of the 2 nd to N-1 st photovoltaic inverter 1 is connected to the second communication interface S5 of the communication device 3 of the previous photovoltaic inverter 1, and the second communication interface S5 is connected to the first communication interface S4 of the communication device 3 of the next photovoltaic inverter 1.
Specifically, the number of communication devices 3 is also N, that is, one communication device 3 is provided inside one photovoltaic inverter 1. The inverter controller 2 may be a digital signal processing (digital signal processor, DSP) controller.
The first communication interface S4 or the second communication interface S5 of the communication device 3 in the 1 st photovoltaic inverter 1 is connected to the monitoring apparatus 4; or the first communication interface S4 or the second communication interface S5 of the communication device 3 in the nth photovoltaic inverter 1 is connected to said monitoring apparatus 4. Specifically, in the present embodiment, as shown in fig. 1, the first communication interface S4 of the communication device 3 in the 1 st photovoltaic inverter 1 is connected to the monitoring apparatus 4.
In this embodiment, the following specifically describes a data stream transmission process when a plurality of photovoltaic inverters 1 are connected in parallel:
the 1 st photovoltaic inverter 1 is set as a master, and the N photovoltaic inverters 1 each have a different inverter ID. The first communication interface S4 of the communication device 3 (i.e., the 1 st communication device 3) connected to the 1 st photovoltaic inverter 1 is connected to the monitoring apparatus 4, and the monitoring apparatus 4 transmits monitoring data to the 1 st communication device 3 through the first communication interface S4, wherein the monitoring data includes a corresponding inverter ID. After receiving the monitoring data, the 1 st communication device 3 determines whether the inverter ID is the ID of the 1 st photovoltaic inverter 1, if not, the monitoring data is sent to the 2 nd communication device 3 through the second communication interface S5 of the local (1 st communication device 3), and the above operation is repeated until the monitoring data is transmitted to the target photovoltaic inverter corresponding to the inverter ID. The inverter controller 2 of the target photovoltaic inverter responds upon receiving the monitoring data. Further, after the inverter controller 2 of the target photovoltaic inverter responds, response data can be generated, the response data is sent to the communication device 3 connected with the target photovoltaic inverter, and the response data is returned to the second communication interface S5 of the previous communication device through the first communication interface S4 of the communication device 3 until the data is returned to the monitoring equipment 4. It should be noted that the above-mentioned monitoring data may include fault data, so that an inverter controller of the failed photovoltaic inverter may make a corresponding timely. Through setting up the dc-to-ac converter ID, pass through each photovoltaic dc-to-ac converter in proper order with the monitoring data and carry out discernment judgement, can avoid useless data to occupy the condition of bus, and only need set up one supervisory equipment 4 in this embodiment can accomplish the control to many photovoltaic dc-to-ac converters 1, the cost is reduced.
The communication device 3 in the present embodiment is electrically connected to the inverter controller 2 of the photovoltaic inverter 1 and a plurality of external devices, respectively. The communication device 3 at least includes a first protocol interface S6, a second protocol interface S3, and an anti-backflow interface S2. The first protocol interface S6 is mainly used for connecting the communication device 3 with the inverter controller 2 of the photovoltaic inverter 1, and the second protocol interface S3 and the anti-backflow interface S2 are mainly used for connecting the communication device 3 with external equipment.
Specifically, the communication device 3 is electrically connected to the inverter controller 2 through the first protocol interface S6 to transmit the first protocol data. The first protocol interface S6 is used for Modbus communication between the communication device 3 and the inverter controller 2, and the first protocol data is specifically Modbus protocol data. Modbus, a serial communication protocol, was published by Modicon corporation for communication using programmable logic inverter controllers (programmable logic controller, PLCs), and is a common connection between industrial electronic devices. The first protocol interface S6 may read the internal data of the inverter controller 2 to the communication device 3.
The communication device 3 is electrically connected to the remote server via a second protocol interface S3 for transmitting second protocol data. The second protocol interface S3 is used for performing a supec communication between the communication device 3 and the remote server, and the second protocol data is specifically a supec protocol data. SunSpec is a protocol developed for communication between different devices in a fast shutdown procedure.
The communication device 3 is electrically connected to the electricity meter measuring system through the anti-backflow interface S2 to transmit anti-backflow detection data. The ammeter measurement system is a Modbus ammeter measurement system, specifically, the ammeter measurement system remotely performs anti-countercurrent detection on the photovoltaic inverter 1 through the anti-countercurrent interface S2, and an anti-countercurrent detection data page obtained through detection is transmitted through the anti-countercurrent interface S2. The backflow prevention interface S2 is further used for transmitting generated power data measured by the ammeter measurement system.
The second protocol interface S3 and the anti-reverse flow interface S2 in the present embodiment may be an RS485 interface or an RS422 interface in view of effective communication over a long distance. The communication device 3 in this embodiment adopts a domestic ARM chip, so that the cost can be effectively reduced.
Further, the communication device 3 further includes a USB interface U1. The communication device 3 stores data through the USB interface and performs software upgrade on the inverter controller 2 of the photovoltaic inverter 1. The USB interface U1 may also be used to provide host service functions and read and write a USB disk, and store data of the photovoltaic inverter 1 and related data of the communication device 3 into an external USB disk. The USB interface U1 may also be used for software upgrades to the inverter controller 2 or the communication device 3 itself.
Further, the communication device 3 also comprises a control interface DI. The communication device 3 is electrically connected via a control interface DI to an external controller for remotely controlling the photovoltaic inverter 1. Considering that the dispatching and response pressure ratio of the inverter controller 2 inside the photovoltaic inverter 1 is larger, other external controllers can be externally connected to realize remote control of the photovoltaic inverter 2, so that the resource dispatching pressure of the inverter controller 2 inside the photovoltaic inverter 1 is shared, and the overall response speed is improved.
Further, the communication device 3 further includes a battery communication interface C1, where the battery communication interface C1 is a communication interface connected to an external energy storage battery, and is used for communication, control, charge-discharge and data transmission of the external energy storage battery, and timely feeding back relevant information of the external energy storage battery to the inverter controller 2 inside the photovoltaic inverter 1. When the communication device 3 uses the battery communication interface C1, the connected photovoltaic inverter 1 is specifically a photovoltaic energy storage inverter. The communication device 3 further comprises an alarm interface DO, the communication device 3 is electrically connected with the alarm device through the alarm interface DO, the alarm device alarms when the photovoltaic inverter 1 fails, and a warning signal can be sent through the alarm interface DO when the failure is monitored to improve the safety of the photovoltaic inverter. The communication device 3 further includes an ethernet interface E1, where the ethernet interface E1 is specifically a 10M or 100M or 1000M interface, and is directly connected to a superior network device such as a router, a switch, or a computer, so as to perform network communication or cloud transmission and cloud storage of data.
The embodiment also discloses a photovoltaic inverter 1, which comprises a shell, an inverter controller 2 arranged in the shell, and the communication device 3 of the photovoltaic inverter, wherein the communication device 3 is arranged in the shell.
In summary, the photovoltaic inverter system in the embodiment has the following advantages:
1. through arranging the communication device in each photovoltaic inverter, the communication device is respectively and electrically connected with the inverter controller of the corresponding photovoltaic inverter and a plurality of external devices, so that the inverter controller in the photovoltaic inverter only needs to control the functions in the inverter, and the communication device performs data interaction and external communication, thereby reducing the communication pressure when a plurality of photovoltaic inverters are connected in parallel and improving the response speed;
2. the communication device is provided with a first protocol interface connected with an inverter controller of the photovoltaic inverter, a second protocol interface connected with external equipment and an anti-backflow interface, after the communication device is used, the inverter controller in the photovoltaic inverter only needs to control the functions in the inverter, and the communication device performs data interaction and external communication, so that the resource scheduling pressure of the inverter controller in the photovoltaic inverter is reduced, the problem that the inverter controller responds untimely is avoided, and the cost is reduced;
3. by setting the ID of the inverter, monitoring data sequentially pass through each photovoltaic inverter and are identified and judged, so that the condition that useless data occupy a bus can be avoided, and the monitoring of a plurality of photovoltaic inverters can be finished by only setting one monitoring device, so that the cost is reduced;
4. the communication device is arranged in the photovoltaic inverter, so that the resource scheduling pressure of an inverter controller in the photovoltaic inverter can be effectively relieved under the condition that the volume is not additionally occupied;
5. besides the first protocol interface, the second protocol interface and the anti-backflow interface, a debugging interface, a USB interface, a control interface, a battery communication interface, an alarm interface and an Ethernet interface can be additionally arranged, so that the communication device has multiple functions, and the resource scheduling pressure of an inverter controller in the photovoltaic inverter is further reduced.
As used in this specification and in the claims, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The term "and/or" as used herein includes any combination of one or more of the associated listed items.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly or indirectly fixed or connected to the other feature. Further, the descriptions of the upper, lower, left, right, etc. used in the present utility model are merely with respect to the mutual positional relationship of the constituent elements of the present utility model in the drawings.
The above-described embodiments are provided for illustrating the technical concept and features of the present utility model, and are intended to be preferred embodiments for those skilled in the art to understand the present utility model and implement the same according to the present utility model, not to limit the scope of the present utility model. All equivalent changes or modifications made according to the principles of the present utility model should be construed to be included within the scope of the present utility model.
Claims (10)
1. The photovoltaic inverter system comprises N photovoltaic inverters which are connected in sequence, and is characterized in that a communication device is further arranged in a shell of each photovoltaic inverter, and the communication devices are respectively and electrically connected with inverter controllers in the corresponding photovoltaic inverters; each of the communication devices includes a first communication interface and a second communication interface, the first communication interface of any one of the 2 nd to N-1 st photovoltaic inverter is connected to the second communication interface of the communication device of the previous photovoltaic inverter, and the second communication interface is connected to the first communication interface of the communication device of the next photovoltaic inverter.
2. The photovoltaic inverter system of claim 1 wherein the number of communication devices is N, one communication device being disposed within a housing of each of the photovoltaic inverters.
3. The photovoltaic inverter system of claim 1 wherein the first communication interface or the second communication interface of the communication device in the 1 st photovoltaic inverter is connected to a monitoring apparatus; or the first communication interface or the second communication interface of the communication device in the Nth photovoltaic inverter is connected to the monitoring equipment.
4. The photovoltaic inverter system of claim 1 wherein each of the communication devices comprises at least a first protocol interface, a second protocol interface, and an anti-reflux interface; the communication device is used for being electrically connected with an inverter controller of the photovoltaic inverter through the first protocol interface to transmit first protocol data; the communication device is used for being electrically connected with a remote server through the second protocol interface to transmit second protocol data; the communication device is used for being electrically connected with the electric meter measuring system through the anti-backflow interface so as to transmit anti-backflow detection data.
5. The photovoltaic inverter system of claim 4, wherein the first protocol interface is configured to perform Modbus communication between the communication device and an inverter controller of the photovoltaic inverter, the first protocol data being Modbus protocol data; the second protocol interface is used for performing the Sunspec communication between the communication device and the remote server, and the second protocol data is Sunspec protocol data.
6. The photovoltaic inverter system of claim 5, wherein the electricity meter measurement system is a Modbus electricity meter measurement system, and the anti-reflux interface is further configured to transmit generated power data measured by the electricity meter measurement system; the second protocol interface and the anti-backflow interface are an RS485 interface or an RS422 interface; the communication device comprises an ARM chip.
7. The photovoltaic inverter system of claim 4 wherein the communication device further comprises a debug interface, the communication device being configured to electrically connect with an external debug apparatus through the debug interface; the communication device also comprises a USB interface, and is used for storing data through the USB interface and carrying out software upgrading on an inverter controller of the photovoltaic inverter.
8. The photovoltaic inverter system of claim 4 wherein the communication device further comprises a control interface, the communication device for electrical connection through the control interface to an external controller for remotely controlling the photovoltaic inverter; the communication device also comprises an alarm interface, and the communication device is used for being electrically connected with the alarm device through the alarm interface.
9. The photovoltaic inverter system of claim 4 wherein the communication device further comprises a battery communication interface for connecting an external energy storage battery; the communication device further comprises an ethernet interface for connecting to a remote router.
10. A photovoltaic inverter comprising a housing, an inverter controller disposed within the housing, and a communication device of the photovoltaic inverter of any of claims 1-9 disposed within the housing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322349540.8U CN220653197U (en) | 2023-08-31 | 2023-08-31 | Photovoltaic inverter system and photovoltaic inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322349540.8U CN220653197U (en) | 2023-08-31 | 2023-08-31 | Photovoltaic inverter system and photovoltaic inverter |
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| CN220653197U true CN220653197U (en) | 2024-03-22 |
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| CN202322349540.8U Active CN220653197U (en) | 2023-08-31 | 2023-08-31 | Photovoltaic inverter system and photovoltaic inverter |
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| CN (1) | CN220653197U (en) |
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- 2023-08-31 CN CN202322349540.8U patent/CN220653197U/en active Active
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