A method, apparatus and system for monitoring photovoltaic modules based on HPLC

Abstract

The present application relates to photovoltaic power generation and power communication technical field, the present application provides a kind of photovoltaic module monitoring method, device and system based on HPLC, by establishing heartbeat signal sending queue, and according to heartbeat signal sending queue in turn to the heart of the sender sends heartbeat signal;Photovoltaic module state quantity is compared with standard state quantity, when the comparison result is in threshold range, judge current photovoltaic module normal, continue to send heartbeat signal to the corresponding heart of the sender, when the comparison result exceeds threshold range, judge current photovoltaic module fault, stop sending heartbeat signal to the corresponding heart of the sender.Based on this, controller can simultaneously carry out batch management to multiple heart of the sender, realize the on-off of heart of the sender, and controller is analyzed by comparing received module state quantity with standard module state quantity, realizes module fault judgment, and is reported by controller to realize fault, to efficiently guarantee photovoltaic module safe power generation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic power generation and power communication, in particular to a photovoltaic module monitoring method, device and system based on HPLC. BACKGROUND

[0002] As the main way of obtaining solar energy and converting it into electric energy, photovoltaic modules are rapidly increasing in number along with the continuous expansion of the installed capacity of photovoltaic inverters and the scale of photovoltaic power stations, and the maximum DC input voltage of inverters is often above 1KV, which poses a huge challenge to photovoltaic module management and power generation safety. SUMMARY

[0003] Therefore, the present application provides a photovoltaic module monitoring method, device and system based on HPLC to solve the problem of how to ensure efficient and safe power generation of photovoltaic modules.

[0004] In a first aspect, the present application provides a photovoltaic module monitoring method based on HPLC, which is applied to a controller connected to a communication line of a shutoff device and an inverter, and includes the following steps:

[0005] receiving a standard state quantity issued by the inverter;

[0006] establishing a heartbeat signal sending queue and sending heartbeat signals to the shutoff device in sequence according to the heartbeat signal sending queue;

[0007] receiving photovoltaic module state quantities returned by the shutoff device, comparing the photovoltaic module state quantities with the standard state quantity, and when the comparison result is within a threshold range, judging that the current photovoltaic module is normal and continuing to send heartbeat signals to the corresponding shutoff device, and when the comparison result exceeds the threshold range, judging that the current photovoltaic module is faulty and stopping sending heartbeat signals to the corresponding shutoff device.

[0008] In an optional embodiment, the establishment of the heartbeat signal sending queue includes the following steps:

[0009] sending an archive information request frame to the shutoff device;

[0010] receiving device information returned by the shutoff device, the device information being composed of device information of the shutoff device and the photovoltaic module;

[0011] establishing archives in sequence according to the return order of the device information, and further establishing a heartbeat signal sending queue according to the archive establishment order.

[0012] In a second aspect, the present application provides a photovoltaic module monitoring method based on HPLC, which is applied to a plurality of cut-off devices, adjacent cut-off devices are connected to each other, the cut-off devices are arranged one-to-one with photovoltaic modules, and the method comprises the following steps:

[0013] receiving a heartbeat signal sent by a controller, and judging whether the heartbeat signal contains a device identifier of the cut-off device and a device identifier of a previous cut-off device;

[0014] when the heartbeat signal only contains the device identifier of the cut-off device, returning a photovoltaic module state quantity to the controller;

[0015] when the heartbeat signal does not contain the device identifier of the cut-off device, forwarding the heartbeat signal to a next cut-off device connected to the cut-off device;

[0016] when the heartbeat signal contains the device identifier of the cut-off device and the device identifier of the previous cut-off device, first returning the photovoltaic module state quantity to the previous cut-off device, and then returning the photovoltaic module state quantity to the controller by the previous cut-off device.

[0017] In an optional embodiment, the method comprises the following steps:

[0018] receiving an archive information request frame sent by a controller, and judging whether the cut-off device is connected to other controllers;

[0019] when the cut-off device is not connected to other controllers, returning device information of the cut-off device and a photovoltaic module to the controller.

[0020] In a third aspect, the present application provides a photovoltaic module monitoring device based on HPLC, which comprises the following steps:

[0021] a first receiving module for receiving a standard state quantity sent by an inverter;

[0022] a first sending module for establishing a heartbeat signal sending queue, and sending heartbeat signals to cut-off devices in turn according to the heartbeat signal sending queue;

[0023] a first comparison module for receiving photovoltaic module state quantities returned by the cut-off devices, comparing the photovoltaic module state quantities with the standard state quantity, judging that a current photovoltaic module is normal when a comparison result is within a threshold range, and continuing to send heartbeat signals to the corresponding cut-off device, and judging that the current photovoltaic module is faulty when the comparison result is out of the threshold range, and stopping sending heartbeat signals to the corresponding cut-off device.

[0024] In a fourth aspect, the present application provides a photovoltaic module monitoring device based on HPLC, which comprises the following steps:

[0025] The first judging module is used for receiving the heartbeat signal sent by the controller and judging whether the heartbeat signal contains the device identifier of the current shutdown device and the device identifier of the previous shutdown device.

[0026] The first feedback module is used for feeding back the state quantity of the photovoltaic module to the controller when the heartbeat signal only contains the device identifier of the current shutdown device.

[0027] The first forwarding module is used for forwarding the heartbeat signal to the next shutdown device connected with the current shutdown device when the heartbeat signal does not contain the device identifier of the current shutdown device.

[0028] The second feedback module is used for feeding back the state quantity of the photovoltaic module to the previous shutdown device first, and then feeding back to the controller by the previous shutdown device when the heartbeat signal contains the device identifier of the current shutdown device and the device identifier of the previous shutdown device.

[0029] In the fifth aspect, the present application provides a photovoltaic module monitoring system based on HPLC, which comprises a controller, an inverter and a plurality of shutdown devices, wherein,

[0030] The controller is used for receiving the standard state quantity issued by the inverter.

[0031] The controller is used for establishing a heartbeat signal sending queue and sending heartbeat signals to the shutdown devices in sequence according to the heartbeat signal sending queue.

[0032] The controller is used for receiving the state quantity of the photovoltaic module fed back by the shutdown device, comparing the state quantity of the photovoltaic module with the standard state quantity, judging that the current photovoltaic module is normal when the comparison result is within a threshold range and continuing to send heartbeat signals to the corresponding shutdown device, and judging that the current photovoltaic module is faulty when the comparison result is out of the threshold range and stopping sending heartbeat signals to the corresponding shutdown device.

[0033] The shutdown device is used for receiving the heartbeat signal sent by the controller and judging whether the heartbeat signal contains the device identifier of the current shutdown device and the device identifier of the previous shutdown device.

[0034] The shutdown device is used for feeding back the state quantity of the photovoltaic module to the controller when the heartbeat signal only contains the device identifier of the current shutdown device.

[0035] The shutdown device is used for forwarding the heartbeat signal to the next shutdown device connected with the current shutdown device when the heartbeat signal does not contain the device identifier of the current shutdown device.

[0036] The shutdown device is configured to, when the heartbeat signal comprises the device identifier of the shutdown device and the device identifier of the previous shutdown device at the same time, return the state quantity of the photovoltaic module to the previous shutdown device, and then return the state quantity of the photovoltaic module to the controller by the previous shutdown device.

[0037] The inverter is configured to issue the standard state quantity to the controller.

[0038] In an optional embodiment, the first interface of the shutdown device is connected with the positive output interface of the photovoltaic module, the second interface of the shutdown device is connected with the negative output interface of the photovoltaic module, the third interface and the fourth interface located on the right side of the shutdown device are connected with the previous shutdown device, the fifth interface and the sixth interface located on the left side of the shutdown device are connected with the next shutdown device, and a plurality of the shutdown devices are connected with each other to form the HPLC communication trunk of the shutdown device.

[0039] The first interface and the second interface of the controller are connected with the HPLC communication trunk of the shutdown device, and the third interface and the fourth interface of the controller are connected with the inverter.

[0040] In a sixth aspect, the present application provides a computer device, comprising a memory and a processor, the memory and the processor are connected with each other in communication, the memory stores computer instructions, and the processor executes the computer instructions to perform the HPLC-based photovoltaic module monitoring method of the first aspect or any of the corresponding embodiments.

[0041] In a seventh aspect, the present application provides a computer readable storage medium, which stores computer instructions, and the computer instructions are used to make the computer execute the HPLC-based photovoltaic module monitoring method of the first aspect or any of the corresponding embodiments.

[0042] The present application provides an HPLC-based photovoltaic module monitoring method, device and system, which sends heartbeat signals to the shutdown devices in turn by establishing a heartbeat signal sending queue, receives the state quantity of the photovoltaic module returned by the shutdown device, and compares the state quantity of the photovoltaic module with the standard state quantity, when the comparison result is within the threshold range, it is judged that the current photovoltaic module is normal, and the heartbeat signal is continued to be sent to the corresponding shutdown device, when the comparison result is out of the threshold range, it is judged that the current photovoltaic module is faulty, and the heartbeat signal is stopped to be sent to the corresponding shutdown device. Based on this, the controller can simultaneously manage a plurality of shutdown devices in batches, realize the on-off of the shutdown device, and the controller compares and analyzes the received state quantity of the module with the standard state quantity of the module, realizes the module fault judgment, and reports the fault by the controller, so as to efficiently guarantee the safe power generation of the photovoltaic module. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0044] Figure 1 is a schematic diagram of a HPLC-based photovoltaic module monitoring system according to an embodiment of the present application;

[0045] Figure 2 is a schematic diagram of a HPLC-based photovoltaic module monitoring method according to an embodiment of the present application;

[0046] Figure 3 is a schematic diagram of another HPLC-based photovoltaic module monitoring method according to an embodiment of the present application;

[0047] Figure 4 is a schematic diagram of still another HPLC-based photovoltaic module monitoring method according to an embodiment of the present application;

[0048] Figure 5 is a structural block diagram of a HPLC-based photovoltaic module monitoring device according to an embodiment of the present application;

[0049] Figure 6 is a structural block diagram of still another HPLC-based photovoltaic module monitoring device according to an embodiment of the present application;

[0050] Figure 7 is a structural block diagram of still another HPLC-based photovoltaic module monitoring device according to an embodiment of the present application;

[0051] Figure 8 is a schematic diagram of communication information interaction of a HPLC-based photovoltaic module monitoring system according to an embodiment of the present application;

[0052] Figure 9 is a schematic diagram of a hardware structure of a computer device according to an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0054] As Figure 1As shown, it is the application scenario schematic diagram of the embodiment of the application, specifically contains controller, inverter and multiple shutdowns. Among them, the photovoltaic module has a positive output interface and a negative output interface. The first interface of the shutdown is connected with the positive output interface of the photovoltaic module, the second interface of the shutdown is connected with the negative output interface of the photovoltaic module, and the shutdown monitors the voltage, current and power information of the photovoltaic module through the first interface and the second interface. The third interface and the fourth interface located on the right side of the shutdown are connected with the previous level shutdown, and the fifth interface and the sixth interface located on the left side of the shutdown are connected with the next level shutdown. The third interface and the fourth interface located on the right side of the shutdown, and the third interface and the fourth interface located on the right side of the shutdown realize the connection between adjacent circuit breakers, and complete the HPLC communication trunk of the shutdown in the hand-in-hand series connection mode. Finally, the communication trunk is connected to the controller to realize the construction of the communication network. The controller has two input and output interfaces, one of which is connected with the communication line of the shutdown, and the other is connected to the inverter to realize power supply from the inverter and RS485 communication with the inverter.

[0055] Among them, HPLC is a kind of low-voltage power line high-speed carrier communication technology, adopts OFDM modulation mode, communication frequency band 0.7-12MHz, communication is stable, and has strong anti-interference performance, and can utilize the existing power line network to carry out data transmission, without secondary wiring, and is widely used in many fields.

[0056] Therefore, based on the application scenario of Figure 1 , and according to the characteristics of the existing photovoltaic power station power network and HPLC communication technology, the application provides a photovoltaic module monitoring method based on HPLC, which is applied to a controller, as shown in Figure 2 , comprising the following steps:

[0057] Step S11, receiving the standard state quantity issued by the inverter.

[0058] Specifically, the inverter issues component information to the controller through the RS485 communication cable, and takes these information as standard state quantity. Among them, these component information contains component voltage, current, power information, device ID and other information.

[0059] Step S12, establishing a heartbeat signal sending queue, and sending heartbeat signals to the shutdowns in turn according to the heartbeat signal sending queue.

[0060] Specifically, the controller receives the standard state quantity issued by the inverter, and then sends the heartbeat signal to the shut-off device through the power carrier line. The controller sends the heartbeat signal to the shut-off device continuously for a plurality of times within a short time after a certain interval. The heartbeat signal includes the device identification of the shut-off device, and each shut-off device has an independent device identification. For example, the heartbeat data frame byte includes: time stamp, controller device identification, shut-off device identification, reserved, transmission type, transmission frequency limit value, and proxy master path identification.

[0061] The initial state of the shut-off device is closed. After receiving the heartbeat signal, the shut-off device determines whether the heartbeat signal contains the device identification of the shut-off device. If the heartbeat signal contains the device identification of the shut-off device, the shut-off device replies to the heartbeat signal and returns the photovoltaic module state quantity. If the heartbeat signal does not contain the device identification of the shut-off device, the shut-off device forwards the heartbeat signal. At this time, the shut-off device acts as a proxy coordinator and plays a relay forwarding function. At this time, the forwarded heartbeat signal adds the device identification of the proxy coordinator.

[0062] When the shut-off device receives the heartbeat signal, if the heartbeat signal contains the device identification of the shut-off device and the device identification of the upper-level shut-off device (proxy coordinator), the shut-off device replies to the heartbeat signal and returns the photovoltaic module state quantity to the upper-level shut-off device first, and then the upper-level shut-off device returns the photovoltaic module state quantity to the controller. The photovoltaic module state quantity contains the component voltage, current, power information, device ID and other information. The photovoltaic module state quantity adds the device identification of the shut-off device in the return process. For example, when the current shut-off device returns the photovoltaic module state quantity to the upper-level shut-off device, the device identification of the current shut-off device is added to the photovoltaic module state quantity. The photovoltaic module state quantity received by the upper-level shut-off device includes not only the component voltage, current, power information, device ID and other information, but also the device identification of the next-level shut-off device associated with itself. The upper-level shut-off device determines that the photovoltaic module state quantity is returned by the next-level shut-off device associated with itself, and then sends the photovoltaic module state quantity to the controller. In step S13, the photovoltaic module state quantity returned by the shut-off device is received, and the photovoltaic module state quantity is compared with the standard state quantity. When the comparison result is within the threshold range, it is determined that the current photovoltaic module is normal, and the heartbeat signal is continuously sent to the corresponding shut-off device. When the comparison result exceeds the threshold range, it is determined that the current photovoltaic module is faulty, and the heartbeat signal is stopped to be sent to the corresponding shut-off device.

[0063] Specifically, the controller receives the photovoltaic module state quantity returned by the shutoff switch in the queue, and analyzes and compares the photovoltaic module state quantity with the standard state quantity issued by the inverter. If the comparison information is within the threshold range, it is determined that the current photovoltaic module is normal, and the controller continues to send the heartbeat signal for the next cycle. If the comparison information is out of the threshold range, it is determined that the current photovoltaic module is faulty, and the controller stops sending the heartbeat signal to the shutoff switch. The shutoff switch does not receive the heartbeat signal, and the shutoff switch is turned off, and the corresponding photovoltaic module is disconnected from the power line.

[0064] In the heartbeat signal sending queue, the controller receives the heartbeat signal returned by the shutoff switch, and the heartbeat signal will not be sent to the shutoff switch in the current heartbeat cycle. The controller processes the heartbeat signal returned by the shutoff switch one by one. When two heartbeat signals returned by the shutoff switches are received at the same time, only one of the heartbeat signals is processed. The other heartbeat signal needs to be processed when the heartbeat signal returned by the shutoff switch is received next time.

[0065] In an optional embodiment, the heartbeat signal sending queue is established, including the following steps:

[0066] Step S121, sending an archive information request frame to the shutoff switch.

[0067] Specifically, the controller establishes the heartbeat signal sending queue, and needs the independent device identification of the shutoff switch and the photovoltaic module device ID and other information. In order to obtain the above information, the controller needs to send an archive information request frame to the shutoff switch, and this data frame can indicate that the controller is the host at this time.

[0068] Step S122, receiving the device information returned by the shutoff switch, and the device information is composed of the device information of the shutoff switch and the photovoltaic module.

[0069] Specifically, after the shutoff switch receives the archive information request frame, it compares whether there is another controller connected with it. If there is another controller, the archive information request frame will not be processed. If there is no other controller, the archive information request frame will be replied, and the device information of the shutoff switch and the photovoltaic module will be returned to the controller. Each branch photovoltaic module is matched with a controller, and the controller records the ID information of each shutoff switch under the branch, and establishes an archive based on the ID information, and uniformly controls and manages the shutoff switch.

[0070] Step S123, sequentially establishing the archive according to the return order of the device information, and determining the heartbeat signal sending queue according to the archive establishment order.

[0071] Specifically, after the controller receives the device information transmitted by the shutoff switch, the controller will sequentially establish the archive according to the order in which the shutoff switch replies. Then when sending the heartbeat, the sending order of the heartbeat will be determined according to the order in which the archive is established.

[0072] The application also provides a photovoltaic module monitoring method based on HPLC. The method is applied to a plurality of cut-off devices, adjacent cut-off devices are connected to each other, and the cut-off devices are arranged in one-to-one correspondence with photovoltaic modules, as shown in the figure, and the method comprises the following steps: Figure 3

[0073] In step S21, the heartbeat signal sent by the controller is received, and it is judged whether the heartbeat signal contains the device identifier of the current cut-off device and the device identifier of the previous cut-off device.

[0074] In step S22, when the heartbeat signal contains only the device identifier of the current cut-off device, the photovoltaic module state quantity is returned to the controller.

[0075] In step S23, when the heartbeat signal does not contain the device identifier of the current cut-off device, the heartbeat signal is forwarded to the next cut-off device connected to the current cut-off device.

[0076] In step S24, when the heartbeat signal contains the device identifier of the current cut-off device and the device identifier of the previous cut-off device, the photovoltaic module state quantity is first returned to the previous cut-off device, and then returned to the controller by the previous cut-off device.

[0077] Specifically, after receiving the heartbeat signal, the cut-off device judges whether the heartbeat signal contains the device identifier of the current cut-off device. If the heartbeat signal contains the device identifier of the current cut-off device, the cut-off device replies to the heartbeat signal and returns the photovoltaic module state quantity to the controller. If the heartbeat signal does not contain the device identifier of the current cut-off device, the cut-off device forwards the heartbeat signal to the next cut-off device connected to the current cut-off device. At this time, the cut-off device acts as a proxy coordinator and plays a relay forwarding function. At this time, the forwarded heartbeat signal will add the device identifier of the proxy coordinator.

[0078] When the cut-off device receives the heartbeat signal, if the heartbeat signal contains the device identifier of the current cut-off device and the device identifier of the previous cut-off device (proxy coordinator), the cut-off device will first return the photovoltaic module state quantity to the previous cut-off device when replying to the heartbeat signal, and then return the photovoltaic module state quantity to the controller by the previous cut-off device. In the process of returning, the photovoltaic module state quantity will add the device identifier of the cut-off device through which the photovoltaic module state quantity passes. For example, when the current cut-off device returns the photovoltaic module state quantity to the previous cut-off device, the device identifier of the current cut-off device will be added to the photovoltaic module state quantity. The photovoltaic module state quantity received by the previous cut-off device not only includes component voltage, current, power information, device ID and other information, but also includes the device identifier of the next cut-off device associated with itself. The previous cut-off device judges that the photovoltaic module state quantity is returned by the next cut-off device associated with itself, and then sends the photovoltaic module state quantity to the controller.

[0079] In an optional embodiment, the following steps are further included:

[0080] ​Step S25, receiving the profile information request frame sent by the controller, and judging whether the current breaker has established a connection with other controllers.

[0081] Step S26, when the current breaker has not established a connection with other controllers, returning the device information of the current breaker and the photovoltaic module to the controller.

[0082] Specifically, after receiving the profile information request frame, the breaker compares whether other controllers have established a connection with it. When the current breaker has not established a connection with other controllers, the profile information request frame is not processed. When the current breaker has not established a connection with other controllers, the profile information request frame is replied, and the device information of the current breaker and the photovoltaic module is returned to the controller.

[0083] The application also provides a photovoltaic module monitoring method based on HPLC, which is applied to an inverter, as shown in the following figure: Figure 4 The method comprises the following steps:

[0084] Step S31, issuing standard state quantities to the controller.

[0085] Specifically, the inverter and the controller communicate through RS485. When the inverter and the controller implement communication information interaction, the inverter issues module information to the controller through the RS485 communication cable, and the information is taken as standard state quantities.

[0086] The application also provides a photovoltaic module monitoring device based on HPLC, as shown in the following figure: Figure 5 The device comprises:

[0087] The first receiving module 51 is used for receiving the standard state quantities issued by the inverter. For details, refer to step S11 in the above embodiment.

[0088] The first sending module 52 is used for establishing a heartbeat signal sending queue, and sending heartbeat signals to the breakers in turn according to the heartbeat signal sending queue. For details, refer to step S12 in the above embodiment.

[0089] The first comparison module 53 is used for receiving the photovoltaic module state quantities returned by the breakers, comparing the photovoltaic module state quantities with the standard state quantities, judging that the current photovoltaic module is normal when the comparison result is within a threshold range, and continuing to send heartbeat signals to the corresponding breakers, and judging that the current photovoltaic module is faulty when the comparison result is out of the threshold range, and stopping sending heartbeat signals to the corresponding breakers. For details, refer to step S13 in the above embodiment.

[0090] The application also provides a photovoltaic module monitoring device based on HPLC, as shown in the following figure: Figure 6 The device comprises:

[0091] The first judging module 61 is configured to receive the heartbeat signal sent by the controller and judge whether the heartbeat signal contains the device identifier of the current shutdown device and the device identifier of the previous shutdown device.

[0092] The first feedback module 62 is configured to feed back the state quantity of the photovoltaic module to the controller when the heartbeat signal contains only the device identifier of the current shutdown device.

[0093] The first forwarding module 63 is configured to forward the heartbeat signal to the next shutdown device connected to the current shutdown device when the heartbeat signal does not contain the device identifier of the current shutdown device.

[0094] The second feedback module 64 is configured to feed back the state quantity of the photovoltaic module to the previous shutdown device first and then to the controller through the previous shutdown device when the heartbeat signal contains both the device identifier of the current shutdown device and the device identifier of the previous shutdown device.

[0095] The application provides a photovoltaic module monitoring device based on HPLC, as shown in the accompanying drawings, comprising: Figure 7

[0096] The first issuing module 71 is configured to issue the standard state quantity to the controller.

[0097] The application further provides a photovoltaic module monitoring system based on HPLC, as shown in the accompanying drawings, comprising a controller, an inverter and a plurality of shutdown devices. Figure 1

[0098] The controller is configured to receive the standard state quantity issued by the inverter, establish a heartbeat signal sending queue and send the heartbeat signal to the shutdown devices in sequence according to the heartbeat signal sending queue. The controller is configured to receive the state quantity of the photovoltaic module fed back by the shutdown devices, compare the state quantity of the photovoltaic module with the standard state quantity, judge that the current photovoltaic module is normal when the comparison result is within a threshold range and continue to send the heartbeat signal to the corresponding shutdown device, and judge that the current photovoltaic module is faulty when the comparison result is beyond the threshold range and stop sending the heartbeat signal to the corresponding shutdown device.

[0099] ​​The shutoff device receives a heartbeat signal sent by the controller, and determines whether the heartbeat signal contains the device identifier of the shutoff device and the device identifier of the previous shutoff device. When the heartbeat signal contains only the device identifier of the shutoff device, the shutoff device returns the photovoltaic module state quantity to the controller. When the heartbeat signal does not contain the device identifier of the shutoff device, the shutoff device forwards the heartbeat signal to the next shutoff device connected to the shutoff device. When the heartbeat signal contains both the device identifier of the shutoff device and the device identifier of the previous shutoff device, the shutoff device first returns the photovoltaic module state quantity to the previous shutoff device, and then returns the photovoltaic module state quantity to the controller through the previous shutoff device.

[0100] The inverter sends a standard state quantity to the controller.

[0101] Specifically, the connection relationship of the devices in the photovoltaic module monitoring system based on HPLC is as follows: the first interface of the shutoff device is connected to the positive output interface of the photovoltaic module, the second interface of the shutoff device is connected to the negative output interface of the photovoltaic module, the third interface and the fourth interface on the right side of the shutoff device are connected to the previous shutoff device, the fifth interface and the sixth interface on the left side of the shutoff device are connected to the next shutoff device, and the plurality of shutoff devices are connected to each other to form an HPLC communication trunk of the shutoff device. The first interface and the second interface of the controller are connected to the HPLC communication trunk of the shutoff device, and the third interface and the fourth interface of the controller are connected to the inverter.

[0102] The communication information interaction of the photovoltaic module monitoring system based on HPLC is as follows Figure 8 As shown in the figure, the adjacent shutoff devices are connected in a hand-in-hand series connection mode to form the HPLC communication trunk of the shutoff device, and the final communication trunk is connected to the controller to realize the construction of the communication network. The controller has two input interfaces and two output interfaces, one of which is connected to the communication line of the shutoff device, and the other is connected to the inverter to realize power supply from the inverter and RS485 communication between the controller and the inverter.

[0103] The application provides a photovoltaic module monitoring method, device and system based on HPLC, a heartbeat signal sending queue is established, and heartbeat signals are sequentially sent to a shutoff device according to the heartbeat signal sending queue; photovoltaic module state quantities returned by the shutoff device are received, and the photovoltaic module state quantities are compared with standard state quantities; when the comparison result is within a threshold range, it is judged that the current photovoltaic module is normal, and the heartbeat signal continues to be sent to the corresponding shutoff device; when the comparison result is out of the threshold range, it is judged that the current photovoltaic module is faulty, and the heartbeat signal stops being sent to the corresponding shutoff device. Based on this, the controller can simultaneously perform batch management on multiple shutoff devices, realize on-off of the shutoff device, and the controller compares and analyzes the received module state quantities with the standard module state quantities, realizes module fault judgment, and reports the fault by the controller, thereby efficiently guaranteeing safe power generation of the photovoltaic module.

[0104] The application also provides a computer device having the above Figures 5-7 photovoltaic module monitoring device based on HPLC.

[0105] Please refer to Figure 9 , Figure 9 is a structural schematic diagram of a computer device provided by an optional embodiment of the application, as Figure 9 shown, the computer device comprises one or more processors 10, a memory 20, and an interface for connecting components, including a high-speed interface and a low-speed interface. Various components are communicatively connected to each other by different buses, and can be installed on a common mainboard or in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in the memory or the memory to display graphical information on a GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memories, if necessary. Similarly, multiple computer devices can be connected, each device providing part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 9 In the above

[0106] The processor 10 can be a central processor, a network processor or a combination thereof. The processor 10 can further include a hardware chip. The hardware chip can be an application specific integrated circuit, a programmable logic device or a combination thereof. The programmable logic device can be a complex programmable logic device, a field programmable logic gate array, a general array logic or any combination thereof.

[0107] The memory 20 stores instructions executable by the at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiments.

[0108] The memory 20 can include a program storage area and a data storage area. The program storage area can store an operating system and application programs required by at least one function. The data storage area can store data created according to the use of the computer device, and the like. In addition, the memory 20 can include a high-speed random access memory, and can also include a non-transitory memory such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some alternative embodiments, the memory 20 can optionally include a memory disposed remotely from the processor 10, which can be connected to the computer device through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0109] The memory 20 can include a volatile memory such as a random access memory, and can also include a non-volatile memory such as a flash memory, a hard disk, or a solid state disk. The memory 20 can also include a combination of the above-mentioned types of memory.

[0110] The computer device also includes a communication interface 30 for communication of the computer device with other devices or communication networks.

[0111] The embodiments of the present application also provide a computer readable storage medium. The above-mentioned method according to the embodiments of the present application can be implemented in hardware, firmware, or recorded in a storage medium, or stored in a remote storage medium or a non-transitory machine readable storage medium and downloaded to a local storage medium through network downloading of computer code, so that the method described herein can be processed by such software on a storage medium using a general purpose computer, a special purpose processor, or programmable or special purpose hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid state disk, and the like. Further, the storage medium can also include a combination of the above-mentioned types of memory. It can be understood that the computer, the processor, the microprocessor controller, or the programmable hardware includes a storage component that can store or receive software or computer code, which, when accessed and executed by the computer, the processor, or the hardware, implements the method shown in the above-mentioned embodiments.

[0112] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be suggested by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are intended to fall within the scope of the appended claims.

Claims

1. A method for monitoring a photovoltaic assembly based on HPLC, characterized in that, The method is applied to a controller connected with a communication line of a shutdown device and an inverter, and the method comprises: receiving a standard state quantity issued by the inverter; establishing a heartbeat signal sending queue, and sending heartbeat signals to the shutdown device in sequence according to the heartbeat signal sending queue; when the heartbeat signal does not contain the device identifier of the shutdown device, forwarding the heartbeat signal to a next-level shutdown device connected with the shutdown device; when the heartbeat signal contains the device identifier of the shutdown device and the device identifier of a previous-level shutdown device, first returning the state quantity of the photovoltaic module to the previous-level shutdown device, and then returning the state quantity of the photovoltaic module to the controller by the previous-level shutdown device; receiving the state quantity of the photovoltaic module returned by the shutdown device, comparing the state quantity of the photovoltaic module with the standard state quantity, when the comparison result is within a threshold range, judging that the current photovoltaic module is normal, and continuing to send heartbeat signals to the corresponding shutdown device, when the comparison result is out of the threshold range, judging that the current photovoltaic module is faulty, and stopping sending heartbeat signals to the corresponding shutdown device.

2. The HPLC-based photovoltaic module monitoring method according to claim 1, characterized in that, The heartbeat signal sending queue is established by: sending an archive information request frame to the shutdown device; receiving device information returned by the shutdown device, the device information being composed of the device information of the shutdown device and the device information of the photovoltaic module; establishing archives in sequence according to the return sequence of the device information, and then determining the heartbeat signal sending queue according to the archive establishment sequence.

3. A method for monitoring a photovoltaic assembly based on HPLC, characterized in that, The method is applied to a plurality of shutdown devices, adjacent shutdown devices are connected with each other, and the shutdown devices are arranged in one-to-one correspondence with photovoltaic modules, and the method comprises: receiving heartbeat signals sent by the controller, and judging whether the heartbeat signals contain the device identifier of the shutdown device and the device identifier of a previous-level shutdown device; when the heartbeat signal contains only the device identifier of the shutdown device, returning the state quantity of the photovoltaic module to the controller; when the heartbeat signal does not contain the device identifier of the shutdown device, forwarding the heartbeat signal to a next-level shutdown device connected with the shutdown device; when the heartbeat signal contains the device identifier of the shutdown device and the device identifier of a previous-level shutdown device, first returning the state quantity of the photovoltaic module to the previous-level shutdown device, and then returning the state quantity of the photovoltaic module to the controller by the previous-level shutdown device.

4. The HPLC-based photovoltaic module monitoring method according to claim 3, characterized in that, The method comprises: receiving an archive information request frame sent by the controller, and judging whether the shutdown device is connected with other controllers; when the shutdown device is not connected with other controllers, returning the device information of the shutdown device and the device information of the photovoltaic module to the controller.

5. A photovoltaic module monitoring device based on HPLC, characterized in that, The device comprises: a first receiving module for receiving a standard state quantity issued by an inverter; a first sending module for establishing a heartbeat signal sending queue, and sending heartbeat signals to a shutdown device in sequence according to the heartbeat signal sending queue; when the heartbeat signal does not contain the device identifier of the shutdown device, forwarding the heartbeat signal to a next-level shutdown device connected with the shutdown device; when the heartbeat signal contains the device identifier of the shutdown device and the device identifier of a previous-level shutdown device, first returning the state quantity of the photovoltaic module to the previous-level shutdown device, and then returning the state quantity of the photovoltaic module to the controller by the previous-level shutdown device; The first comparison module is configured to receive the PV module state quantity returned by the shutdown device, compare the PV module state quantity with the standard state quantity, determine that the current PV module is normal when the comparison result is within a threshold range, continue to send the heartbeat signal to the corresponding shutdown device, determine that the current PV module is faulty when the comparison result is beyond the threshold range, and stop sending the heartbeat signal to the corresponding shutdown device.

6. A HPLC based photovoltaic module monitoring device characterized by, The device comprises: The first determination module is configured to receive the heartbeat signal sent by the controller and determine whether the heartbeat signal contains the device identifier of the shutdown device and the device identifier of the previous shutdown device. The first return module is configured to return the PV module state quantity to the controller when the heartbeat signal contains only the device identifier of the shutdown device. The first forwarding module is configured to forward the heartbeat signal to the next shutdown device connected to the shutdown device when the heartbeat signal does not contain the device identifier of the shutdown device. The second return module is configured to return the PV module state quantity to the previous shutdown device first when the heartbeat signal contains the device identifier of the shutdown device and the device identifier of the previous shutdown device, and then return the PV module state quantity to the controller by the previous shutdown device.

7. A HPLC based photovoltaic module monitoring system characterized by, The system comprises a controller, an inverter and a plurality of shutdown devices, wherein The controller is configured to receive the standard state quantity issued by the inverter. The controller is configured to establish a heartbeat signal sending queue and send the heartbeat signal to the shutdown devices in sequence according to the heartbeat signal sending queue. The controller is configured to receive the PV module state quantity returned by the shutdown device, compare the PV module state quantity with the standard state quantity, determine that the current PV module is normal when the comparison result is within a threshold range, continue to send the heartbeat signal to the corresponding shutdown device, determine that the current PV module is faulty when the comparison result is beyond the threshold range, and stop sending the heartbeat signal to the corresponding shutdown device. The shutdown device is configured to receive the heartbeat signal sent by the controller and determine whether the heartbeat signal contains the device identifier of the shutdown device and the device identifier of the previous shutdown device. The shutdown device is configured to return the PV module state quantity to the controller when the heartbeat signal contains only the device identifier of the shutdown device. The shutdown device is configured to forward the heartbeat signal to the next shutdown device connected to the shutdown device when the heartbeat signal does not contain the device identifier of the shutdown device. The shutdown device is configured to return the PV module state quantity to the previous shutdown device first when the heartbeat signal contains the device identifier of the shutdown device and the device identifier of the previous shutdown device, and then return the PV module state quantity to the controller by the previous shutdown device. The inverter is configured to issue the standard state quantity to the controller.

8. The HPLC-based PV module monitoring system according to claim 7, wherein The first interface of the shutdown device is connected with the positive output interface of the photovoltaic module, the second interface of the shutdown device is connected with the negative output interface of the photovoltaic module, the third interface and the fourth interface on the right side of the shutdown device are connected with the previous stage shutdown device, the fifth interface and the sixth interface on the left side of the shutdown device are connected with the next stage shutdown device, and a plurality of the shutdown devices are connected with each other to form an HPLC communication trunk of the shutdown device. The first interface and the second interface of the controller are connected with the HPLC communication trunk of the shutdown device, and the third interface and the fourth interface of the controller are connected with the inverter.

9. A computer device, comprising: Comprise: A memory and a processor, which are connected with each other in communication, the memory stores computer instructions, and the processor executes the computer instructions to perform the HPLC-based photovoltaic module monitoring method in any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions for making a computer execute the HPLC-based photovoltaic module monitoring method in any one of claims 1 to 4.

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