A remote operation and maintenance management system for distributed photovoltaic systems

Abstract

The application relates to the technical field of photovoltaic operation and maintenance management, in particular to a remote operation and maintenance management system of a distributed photovoltaic system, which comprises an information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a monitoring point-based information acquisition module, a

Description

Technical Field

[0001] This invention relates to the field of photovoltaic operation and maintenance management technology, specifically a remote operation and maintenance management system for distributed photovoltaic systems. Background Technology

[0002] As the global energy structure shifts towards cleaner and lower-carbon energy, distributed photovoltaic (PV) power generation systems are widely used due to their advantages such as high flexibility, short construction period, and localized energy consumption. However, with the surge in the number and expansion of PV power plants, the complexity and difficulty of operation and maintenance management have increased significantly. In multi-site distributed scenarios, due to the geographically dispersed locations of the sites, the diverse types of equipment, and the large volume of data, data transmission anomalies are prone to occur during the transmission of large amounts of data to the remote management terminal. This prevents the operation and maintenance management center from grasping the real-time information of each PV site, thereby affecting the efficiency of the management terminal in responding to PV site information and ultimately impacting the operation and maintenance efficiency of the PV system.

[0003] Therefore, we propose a remote operation and maintenance management system for distributed photovoltaic systems to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a remote operation and maintenance management system for distributed photovoltaic systems to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a remote operation and maintenance management system for a distributed photovoltaic system, comprising:

[0006] The information acquisition module is used to acquire information from multiple photovoltaic power stations in a distributed photovoltaic system. Monitoring points are set up for each photovoltaic power station, and the information of each photovoltaic power station is collected based on the monitoring points.

[0007] The information transmission module is used to connect with the information acquisition module, register the monitoring terminal based on the monitoring point, establish a transmission channel between the monitoring terminal and the cloud server, and transmit the site information to the cloud server based on the transmission channel;

[0008] The operation and maintenance assessment module is used to connect with the information transmission module to obtain the information of each photovoltaic power station from the cloud server and assess the operation and maintenance index of each photovoltaic power station based on the information.

[0009] The operation and maintenance management module is used to connect with the operation and maintenance assessment module, sort each photovoltaic power station according to the operation and maintenance index, and perform maintenance on each photovoltaic power station in turn.

[0010] Preferably, the step of acquiring information about multiple photovoltaic power stations of a distributed photovoltaic system, deploying monitoring points for each photovoltaic power station, and collecting station information based on the monitoring points includes:

[0011] Acquire multiple photovoltaic power stations of a distributed photovoltaic system and set up monitoring points for each photovoltaic power station;

[0012] Information is linked between monitoring points and photovoltaic power plant information, and information about each photovoltaic power plant is collected based on the monitoring points.

[0013] Preferably, the step of establishing a transmission channel between the monitoring terminal and the cloud server includes:

[0014] The cloud server is divided into storage areas to obtain multiple sub-databases, and connection channels are established between each monitoring terminal and the corresponding sub-database;

[0015] A transmission line is set up based on the connection channel, wherein multiple guide points are evenly arranged in the transmission line; the connection relationship between the multiple guide points is established based on the transmission line to obtain an independent connection channel;

[0016] Set up tracking disks for multiple monitoring terminals and establish a common connection channel between the tracking disks and the cloud server; establish the association between the common connection channel and the independent connection channel;

[0017] The transmission channel between the monitoring terminal and the cloud server is obtained by integrating the public connection channel, the independent connection channel, and the relationship between the public connection channel and the independent connection channel.

[0018] Preferably, the step of setting up tracking disks for multiple monitoring terminals and establishing a public connection channel between the tracking disks and the cloud server includes:

[0019] Multiple monitoring terminals are connected sequentially to form a monitoring network. The monitoring network is then mapped to obtain a tracking disk, which includes multiple tracking points, each of which is a mapping point of the monitoring terminal in the tracking disk.

[0020] Establish a common connection channel between the tracking disk and the cloud server. The common connection channel includes a main channel and multiple pairs of sub-channels. The sub-channels at both ends of the main channel are set in pairs, and the other end of each pair of sub-channels is connected to the tracking point and the sub-database, respectively.

[0021] Preferably, the step of establishing the association between the public connection channel and the independent connection channel includes:

[0022] Based on the independent connection channel, a moving point is set to follow the guide point. There is a one-to-one correspondence between the moving point and the monitoring end, and an association channel is established between the moving point and the tracking point.

[0023] A unique identifier is assigned to each of the multiple monitoring terminals and multiple sub-databases, and the identifier of the monitoring terminal and the identifier of the corresponding sub-database are used as a pair of identifiers.

[0024] Preferably, the step of transmitting the site information to the cloud server based on the transmission channel includes:

[0025] Based on the monitoring terminal, the information of the photovoltaic power station is packaged into a power station information package;

[0026] Bind the station information package to the monitoring terminal; copy the station information package based on the monitoring terminal to obtain a backup information package;

[0027] Preset movement rules for the moving point on the transmission line;

[0028] For the independent connection channel corresponding to the mobile point that meets the mobile rule information, the station information packet is transmitted to the corresponding sub-database through the independent connection channel;

[0029] For independent connection channels corresponding to mobile points that do not meet the mobile rule information, the tracking point corresponding to the abnormal independent connection channel is automatically activated as the target tracking point. Based on the target tracking point, the target common connection channel is determined, and the backup information packet is transmitted to the sub-database of the corresponding monitoring terminal through the target common connection channel.

[0030] Preferably, the steps of automatically activating the tracking point corresponding to the abnormal independent connection channel as the target tracking point for the independent connection channel corresponding to the mobile point that does not meet the mobile rule information, determining the target public connection channel based on the target tracking point, and transmitting the backup information packet to the sub-database of the corresponding monitoring terminal through the target public connection channel include:

[0031] Based on the associated channel, the tracking point corresponding to the moving point that does not meet the moving rule information is obtained as the target tracking point and activated. Then, arbitrarily select a pair of sub-channels and connect one of the sub-channels in the pair to the target tracking point.

[0032] Obtain the monitoring terminal corresponding to the target tracking point as the target monitoring terminal;

[0033] Based on the identity identifier of the target monitoring terminal, obtain the sub-database corresponding to the target monitoring terminal as the target sub-database;

[0034] Connect the target sub-database to another sub-channel in a pair of sub-channels to obtain the target common connection channel;

[0035] The backup information packet is transmitted to the target sub-database via the target public connection channel.

[0036] Preferably, the step of obtaining the site information corresponding to each photovoltaic power station from the cloud server and evaluating the operation and maintenance index of each photovoltaic power station based on the site information includes:

[0037] Obtain the monitoring terminal corresponding to each sub-database in the cloud server, and determine the photovoltaic power station corresponding to each sub-database based on the monitoring terminal;

[0038] The information of each photovoltaic power station is extracted from the sub-database, and the operation and maintenance index of each photovoltaic power station is evaluated based on the information of the power station.

[0039] Preferably, the step of sorting the photovoltaic power stations according to the operation and maintenance index and then maintaining each photovoltaic power station in turn includes:

[0040] Obtain the operation and maintenance index of each photovoltaic power station, and sort the photovoltaic power stations in descending order based on the operation and maintenance index to obtain the preliminary sorting result;

[0041] Obtain information on photovoltaic power plants with faults, assess the urgency of the faults, and insert the photovoltaic power plants into the initial ranking results based on the urgency of the faults to obtain the power plant ranking results;

[0042] Each photovoltaic power station is maintained sequentially based on the station ranking results.

[0043] Compared with the prior art, the beneficial effects of the present invention are:

[0044] By constructing a dual transmission network comprising independent and public connection channels, combined with a dynamic association mechanism between mobile and tracking points, the system ensures reliable transmission of site information to the cloud server under both normal and abnormal conditions, significantly reducing the risk of data loss. Employing a backup information packet and automatic switching mechanism for abnormal channels, the public connection channel is quickly activated when the independent connection channel fails, guaranteeing the accuracy and real-time nature of data transmission to the management cloud server. This effectively avoids operational assessment deviations caused by data transmission delays or interruptions, improves the timeliness of the management's response to photovoltaic site information, ensures the accuracy of operational index calculations, and ultimately enhances the efficiency of distributed photovoltaic system operation and maintenance management. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a system structure block diagram of the present invention;

[0047] Figure 2 This is a structural block diagram of the information transmission module of the present invention. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Example

[0050] Please see Figures 1 to 2 This invention provides a technical solution for a remote operation and maintenance management system for a distributed photovoltaic system: a remote operation and maintenance management system for a distributed photovoltaic system, comprising:

[0051] The information acquisition module is used to acquire information from multiple photovoltaic power stations in a distributed photovoltaic system. Monitoring points are set up for each photovoltaic power station, and the information of each photovoltaic power station is collected based on the monitoring points.

[0052] The steps for acquiring multiple photovoltaic (PV) stations of a distributed PV system, setting up monitoring points for each PV station, and collecting station information based on the monitoring points include: acquiring multiple PV stations of a distributed PV system, setting up monitoring points for each PV station, binding information between the monitoring points and the station information of the PV stations, and collecting station information based on the monitoring points.

[0053] Specifically, the information at the photovoltaic power plant can include equipment operation data, historical maintenance data, environmental information, and power generation and consumption information. The photovoltaic power plant is divided into multiple operation and maintenance areas, each corresponding to a sub-monitoring point. These multiple monitoring points form a centralized monitoring point. The centralized monitoring point is bound to the photovoltaic power plant, and the sub-monitoring points are bound to the operation and maintenance areas. This ensures that the information transmitted by the centralized monitoring point accurately corresponds to the photovoltaic power plant, and that the localized power plant information collected by the sub-monitoring points corresponds to the operation and maintenance areas. Binding the centralized monitoring point to the photovoltaic power plant ensures that the power plant information transmitted by the monitoring point accurately corresponds to the photovoltaic power plant it monitors. This improves the accuracy of obtaining power plant information for the operation and maintenance index of the photovoltaic power plant, and consequently improves the accuracy of the operation and maintenance index assessment.

[0054] The information transmission module is used to connect with the information acquisition module, register the monitoring terminal based on the monitoring point, establish a transmission channel between the monitoring terminal and the cloud server, and transmit the site information to the cloud server based on the transmission channel;

[0055] The steps for establishing a transmission channel between the monitoring terminal and the cloud server include: dividing the cloud server into storage areas to obtain multiple sub-databases; establishing connection channels between each monitoring terminal and its corresponding sub-database; setting up transmission lines based on the connection channels, wherein multiple guide points are evenly distributed along the transmission lines; establishing connection relationships between the multiple guide points based on the transmission lines to obtain independent connection channels; setting up tracking disks for multiple monitoring terminals and establishing a common connection channel between the tracking disks and the cloud server; establishing the association relationship between the common connection channel and the independent connection channels; and integrating the common connection channel, the independent connection channels, and the association relationship between the common connection channel and the independent connection channels to obtain the transmission channel between the monitoring terminal and the cloud server.

[0056] Specifically, by setting guide points and transmission lines as the movement trajectories of subsequent moving points, the movement trajectory can be used to determine whether the movement of the moving points on the transmission lines is normal. When the movement trajectory breaks at a certain guide point, it indicates that the transmission of information packets in the independent connection channel has an anomaly, such as an interruption. When an anomaly occurs, the tracking point of the corresponding moving point is determined according to the correlation. Through the sub-channel and main channel of the corresponding tracking point, the information packets of the monitoring end corresponding to the tracking point are retransmitted to the sub-database of the corresponding monitoring end through the sub-channel and main channel. This ensures that when the independent connection channel between the monitoring end and the sub-database is abnormal, a common connection channel can be selected for transmission, thereby ensuring that the information of the photovoltaic power station can be transmitted to the corresponding sub-database in a timely and accurate manner. This facilitates the subsequent evaluation of the operation and maintenance index of the photovoltaic power station based on the information, the determination of the operation and maintenance priority of the corresponding photovoltaic power station information based on the operation and maintenance index, and the formulation of corresponding operation and maintenance strategies based on the specific situation of the photovoltaic power station, thus completing the operation and maintenance management of each photovoltaic power station.

[0057] The steps for setting up tracking disks for multiple monitoring terminals and establishing a common connection channel between the tracking disks and the cloud server include: connecting multiple monitoring terminals sequentially to form a monitoring network; mapping the monitoring network to obtain a tracking disk, wherein the tracking disk includes multiple tracking points, and the tracking points are the mapping points of the monitoring terminals in the tracking disk; establishing a common connection channel between the tracking disks and the cloud server, wherein the common connection channel includes a main channel and multiple pairs of sub-channels, the sub-channels at both ends of the main channel are set in pairs, and the other end of each pair of sub-channels is connected to the tracking points and the sub-database respectively;

[0058] Specifically, this corresponds to the monitoring network mapping tracking panel, and the corresponding monitoring terminal is mapped to a tracking point. Assume that two sub-channels (a pair of sub-channels) are connected to each end of the main channel. The other end of each sub-channel connects to a tracking point and a sub-database. There are multiple sub-databases and multiple tracking points. Tracking points and movement points are associated and bound together. Abnormal movement of a movement point on the transmission line triggers the corresponding tracking point, thus connecting the sub-channel to the corresponding tracking point. The monitoring terminal and the corresponding sub-database are also associated and bound together. Therefore, based on the tracking point associated with the abnormal movement point, both ends of the two sub-channels can automatically connect to the monitoring terminal and the corresponding sub-database for each pair of identifications. The sub-channels act as branch paths, extending outwards from both sides of the main channel, forming a tree-like branch structure. Each pair of sub-channels constitutes an independent transmission unit with the main channel. One end of a sub-channel connects to the main channel, and the other end connects to a tracking point. During connection, one tracking point is selected from multiple tracking points for connection, and the other sub-channel... One end of the channel is connected to the other end of the main channel, and the other end of the other sub-channel is connected to the sub-database of the corresponding tracking point. It is ensured that the sub-databases connected by the two sub-channels and the identity identifiers of the monitoring terminals corresponding to the tracking points are a pair. Multiple sub-channels can also be set at both ends of the main channel. One end of each sub-channel is connected to the main channel, and the other end of each sub-channel at one end of the main channel is connected to the tracking point of the corresponding abnormal movement point. This allows the common connection channel to be used for transmission when multiple independent connection channels malfunction. The other end of each sub-channel at the other end of the main channel is connected to the sub-database of the monitoring terminal of the corresponding tracking point. The monitoring terminals and sub-databases connected to the sub-channels at both ends of the main channel depend on the independent connection channel where the abnormal movement point is located. The tracking point corresponding to the movement point is activated based on the abnormal independent connection channel, thereby determining the monitoring terminals and sub-databases corresponding to the sub-channels at both ends of the main channel. This ensures that when the transmission of an independent connection channel is interrupted, the common independent transmission channel can be used for retransmission, guaranteeing the timeliness and accuracy of data transmission.Before the information packets are transmitted through the public connection channel, the information packets of each monitoring terminal are bound to the corresponding identity identifier of the monitoring terminal. Based on the identity identifier of the monitoring terminal, the identity identifier of the sub-database to which the information packet needs to be transmitted is determined, and the information packet is then transmitted to the sub-database corresponding to that identity identifier. This ensures that when multiple independent connection channels malfunction simultaneously, the connection between the corresponding tracking point and the sub-database can be automatically selected through multiple sub-channels. When multiple independent connection channels malfunction simultaneously, multiple sub-channels can randomly select one tracking point to establish a connection. When no independent connection channel malfunctions, the sub-channel, tracking point, and sub-database are all disconnected. Only when an independent connection channel malfunctions will the corresponding tracking point be triggered, thus randomly selecting the tracking point. One sub-channel is connected, and then the information packet is transmitted to the other sub-channel through the main channel. The other sub-channel automatically connects to the corresponding sub-database. The sub-channels at both ends of the main channel also appear in pairs, which can be one or more pairs. Each pair of sub-channels corresponds to the tracking point and sub-database of the monitoring terminal corresponding to a pair of identity identifiers. Before transmission, the site information packet is copied at the monitoring terminal for backup and marked according to the collection time point. The site information packet is bound to the corresponding monitoring terminal and transmitted to the sub-database of the corresponding monitoring terminal. When multiple sub-channels connect to the monitoring terminals corresponding to multiple tracking points, multiple site information packets will be transmitted simultaneously in the main channel. Each site information packet is independent and will not affect each other during transmission, which makes it convenient for the sub-database to extract the site information for the required time period when acquiring information.

[0059] The steps for establishing the association between the public connection channel and the independent connection channel include: setting a mobile point that follows the guide point based on the independent connection channel, wherein there is a one-to-one correspondence between the mobile point and the monitoring terminal, and establishing an association channel between the mobile point and the tracking point; setting a unique identity identifier for multiple monitoring terminals and multiple sub-databases respectively, and using the identity identifier of the monitoring terminal and the identity identifier of the corresponding sub-database of the monitoring terminal as a pair of identity identifiers;

[0060] Specifically, an association channel is established between the mobile point and the tracking point to achieve dynamic binding between them. Each pair of identifiers can associate the monitoring terminal with the corresponding sub-database. This allows the other end of another sub-channel to automatically connect to the sub-database corresponding to the tracking point when determining the tracking point corresponding to a sub-channel. Each pair of identifiers corresponds to the monitoring terminal and sub-database of two sub-channels in a pair. Paired identifiers ensure that the monitoring terminal and sub-database corresponding to the tracking points connected at both ends of the two sub-channels are paired, guaranteeing that the monitoring terminal and sub-database connected at both ends of the common connection channel are consistent with those connected at both ends of the independent connection channel. When an independent connection channel malfunctions, the connection between the sub-channel and the main channel changes from passive dormancy to active activation. The specific process is as follows: The monitoring terminal determines the independent channel failure based on heartbeat timeout or data packet loss rate threshold. The abnormal mobile point triggers the association of the tracking point, and the tracking point sends a connection request frame (containing identifier and data packet priority) to the main channel. The main channel's routing control module selects an idle sub-channel from the port matrix based on the tracking point ID in the request frame and establishes a temporary transmission tunnel. The data stream from the original independent connection channel is switched to the newly established sub-channel. The main channel uses multiplexing technology (such as time division multiplexing, TDM) to achieve concurrent data transmission from multiple sub-channels, ensuring the timeliness and accuracy of data transmission.

[0061] Specifically, each tracking point is bound to its corresponding monitoring terminal, meaning the tracking point is mapped from the monitoring terminal. Multiple monitoring terminals mapping to tracking points form a tracking disk, which is connected to a common connection channel. The two ends of the sub-channels at both ends of the common connection channel are connected to the tracking points and sub-databases, respectively. By setting up multiple monitoring points, cloud servers, multiple guide points, and tracking points on the tracking disk, independent connection channels and a common connection channel are constructed between the monitoring terminal and the cloud server. When an independent connection channel experiences an interruption, data is automatically transmitted from the common connection channel to the corresponding sub-database. By associating and binding the tracking points, monitoring terminals, and their corresponding sub-databases, the tracking disk formed by the tracking points serves as one end of the common connection channel, and the sub-database serves as the other end. The two ends of the common connection channel are connected to the initiated tracking point and the sub-database of the independent connection channel where the tracking point's corresponding movement point is located, respectively. Trigger conditions are set for the tracking points. The activation condition refers to an abnormal movement trajectory of the mobile point on the guide point, such as the mobile point ceasing to move or the movement trajectory of the mobile point being inconsistent with the transmission line corresponding to the guide point. In this case, the mobile point is judged as abnormal, and the tracking point corresponding to the mobile point is automatically activated. At the same time, the connection between the tracking point and the sub-channel is established. When the mobile point moves normally on the guide point of the independent connection channel, the connection between the sub-channel and the tracking point is automatically closed or disconnected. Normal movement means that the mobile point can move on multiple guide points according to the preset speed, time and transmission line. When the mobile point is abnormal, the corresponding tracking point is activated through the associated channel. The tracking point, mobile point and independent connection channel correspond one-to-one. When the independent connection channel is abnormal, the field information packet is retransmitted through the tracking point using the common connection channel. It can dynamically adjust the transmission path of the field information according to the transmission status of the independent connection channel, realize the automatic transmission of data interruption points after the link is interrupted, and improve the timeliness and accuracy of the field information of the photovoltaic field.

[0062] The steps for transmitting photovoltaic power plant information to the cloud server via a transmission channel include: packaging the power plant information corresponding to the photovoltaic power plant into a power plant information package based on the monitoring terminal; binding the power plant information package with the monitoring terminal; copying the power plant information package based on the monitoring terminal to obtain a backup information package; pre-setting the movement rule information of the mobile point on the transmission line; for the independent connection channel corresponding to the mobile point that meets the movement rule information, transmitting the power plant information package to the corresponding sub-database through the independent connection channel; for the independent connection channel corresponding to the mobile point that does not meet the movement rule information, automatically activating the tracking point corresponding to the abnormal independent connection channel as the target tracking point; determining the target public connection channel based on the target tracking point; and transmitting the backup information package to the sub-database of the corresponding monitoring terminal through the target public connection channel.

[0063] It should be noted that the process involves acquiring the movement information of the moving point on the transmission line, which includes the movement speed, movement interval time, and movement trajectory; and pre-setting the movement rule information of the moving point on the transmission line, which refers to the speed, time, and transmission line of the pre-set moving point, with the transmission line serving as the pre-set movement trajectory and the guide point serving as the next position point of the pre-set moving point.

[0064] The steps for automatically activating the tracking point corresponding to the independent connection channel of a mobile point that does not meet the mobility rule information as the target tracking point, determining the target common connection channel based on the target tracking point, and transmitting the backup information packet to the sub-database of the corresponding monitoring terminal through the target common connection channel include: obtaining the tracking point corresponding to the mobile point that does not meet the mobility rule information as the target tracking point based on the associated channel and activating it; arbitrarily selecting a pair of sub-channels and connecting one of the sub-channels in the pair to the target tracking point; obtaining the monitoring terminal corresponding to the target tracking point as the target monitoring terminal; obtaining the sub-database corresponding to the target monitoring terminal as the target sub-database based on the identity of the target monitoring terminal; connecting the target sub-database to the other sub-channel in the pair of sub-channels to obtain the target common connection channel; and transmitting the backup information packet to the target sub-database through the target common connection channel.

[0065] Specifically, at the monitoring end, the station information is packaged into an information packet. This information packet is then copied and transmitted via an independent connection channel. If the independent connection channel experiences a transmission interruption or other anomaly, the tracking point corresponding to the moving point is triggered via an associated channel. A sub-channel is connected to the tracking point, and another sub-channel is connected to the sub-database corresponding to the tracking point. This connects the tracking point of the corresponding moving point to the sub-database. A common connection channel is then established between the monitoring end and the sub-database corresponding to the faulty independent connection channel. The backup information packet copied at the monitoring end is then retransmitted through the common channel between the tracking point and the sub-database. Finally, the target tracking point is connected to the corresponding monitoring end's sub-database via the target common connection channel. At this point, the public connection channel is equivalent to a temporarily established transmission channel. It is used to automatically activate the public connection channel when the independent connection channel experiences transmission anomalies. This ensures that even when the transmission channel fails, the information from the photovoltaic power plant can still be transmitted quickly and accurately to the corresponding sub-database. When the sub-database retrieves information, it can extract the information from each photovoltaic power plant as needed. This allows for subsequent evaluation of the operation and maintenance index of the corresponding photovoltaic power plant based on the information. The operation and maintenance priority of the corresponding photovoltaic power plant information is determined based on the operation and maintenance index, and corresponding operation and maintenance strategies are formulated according to the specific situation of the photovoltaic power plant. This completes the operation and maintenance management of each photovoltaic power plant and prevents situations where untimely data transmission during operation and maintenance evaluation can lead to the inability to perform timely operation and maintenance of the photovoltaic system. This improves the accuracy and timeliness of the operation and maintenance of distributed photovoltaic systems.

[0066] The operation and maintenance assessment module is used to connect with the information transmission module to obtain the information of each photovoltaic power station from the cloud server and assess the operation and maintenance index of each photovoltaic power station based on the information.

[0067] The steps for obtaining the site information corresponding to each photovoltaic power station from the cloud server and evaluating the operation and maintenance index of each photovoltaic power station based on the site information include: obtaining the monitoring terminal corresponding to each sub-database in the cloud server, determining the photovoltaic power station corresponding to each sub-database based on the monitoring terminal; extracting the site information from the site information package of each photovoltaic power station based on the sub-database, and evaluating the operation and maintenance index of each photovoltaic power station based on the site information.

[0068] The site information includes the operational status data and historical maintenance data of each device. The specific content of evaluating the maintenance index of each photovoltaic site based on this information is as follows: The equipment health index is assessed based on the operational status data, and the maintenance efficiency is assessed based on the historical maintenance data. The Equipment Health Index (EHI) is calculated by weighting the failure rate of key equipment (inverters, strings, brackets, etc.). The corresponding calculation formula is... Where EHI represents the equipment health index (0-1, the closer to 1 the healthier), n represents the total number of devices (e.g., inverters, photovoltaic strings, etc.), and ω i Tg represents the weight of the i-th type of device (must be manually set, e.g., inverter weight 0.6, string weight 0.4). i Ti represents the cumulative failure time of the i-th type of equipment within the statistical period, and Tz represents the theoretical maximum operating time within the statistical period; the operation and maintenance efficiency index is evaluated based on historical operation and maintenance response speed and effectiveness, and the corresponding calculation formula is: Where OMI represents the Operation and Maintenance Efficiency Index (0-1), P represents the fault repair timeliness score, which is the score for a single fault repair (e.g., 1 point for repair within 24 hours, 0.8 points for repair within 48 hours, and so on), C represents the preventive maintenance completion rate, which is the actual completion rate of a single preventive maintenance (e.g., if 8 out of 10 cleanings are planned, the completion rate is 0.8), and m represents the sum of fault events and preventive maintenance events within the statistical period; the power generation efficiency index is calculated by comparing the actual power generation with the theoretical expected value (considering environmental factors), and the corresponding formula is... Where PEI represents the power generation efficiency index (which may be greater than 1 if actual power generation exceeds the theoretical value), E represents the actual power generation within the statistical period of the power station (e.g., monthly / annual), and E′ represents the simulated power generation under the same environmental conditions (irradiance, temperature, dust loss); the power station's operation and maintenance index is evaluated based on the operation and maintenance efficiency index, equipment health index, and power generation efficiency index, and the corresponding calculation formula is as follows: in, The operation and maintenance index of the photovoltaic power station is represented by α, β, and δ, which are the weighting coefficients of the operation and maintenance efficiency index, equipment health index, and power generation efficiency index, respectively, and α+β+δ=1;

[0069] The operation and maintenance management module is used to connect with the operation and maintenance assessment module, sort each photovoltaic power station according to the operation and maintenance index, and perform maintenance on each photovoltaic power station in turn;

[0070] The steps for sorting each photovoltaic (PV) power station according to its operation and maintenance index and then maintaining each PV power station in sequence include: obtaining the operation and maintenance index of each PV power station; sorting each PV power station in descending order based on the operation and maintenance index to obtain a preliminary sorting result; obtaining information on PV power stations with faults and assessing the urgency of the faults; inserting PV power stations into the preliminary sorting result based on the urgency of the faults to obtain a power station sorting result; and maintaining each PV power station in sequence based on the power station sorting result.

[0071] Specifically, the process of obtaining information on faulty photovoltaic power plants and assessing their urgency involves detecting real-time fault alarm signals at each plant. If any of the following urgent faults are present, the plant's priority is increased: Level 1 faults (immediate handling): such as inverter meltdown, fire risk, grid disconnection; Level 2 faults (handled within 24 hours): such as string mismatch, communication interruption; Level 3 faults (handled within 72 hours): such as dust obstruction, minor power degradation. Based on the urgency of the faults, plants with high-urgency faults are placed at the front of the queue, and the remaining plants are arranged according to their original maintenance index. Based on the final ranking, maintenance work orders are generated for each plant, including a list of equipment to be maintained (such as inverter number and string position), maintenance type (preventive maintenance / fault repair / performance optimization), and required resources (personnel, spare parts, tools). For tasks within the same photovoltaic (PV) system, sub-tasks are prioritized based on fault urgency: Level 1 faults are handled first, followed by Level 2 faults, and finally Level 3 faults and routine maintenance. After maintenance is completed, the PV system's O&M index is updated, and the queue is reordered. For PV systems with recurring faults, their subsequent ranking weight is increased (e.g., EHI weight is increased by 10%). The O&M index is calculated comprehensively based on multi-dimensional PV system information (such as power generation efficiency, equipment status, and environmental data) to scientifically quantify the O&M needs of each PV system and avoid misjudgments caused by human experience. By dynamically adjusting the urgency of faults, high-risk faults are prioritized, reducing power generation losses and improving system security. Through accurate and timely O&M assessments, high-priority PV systems can be quickly identified and prioritized, reducing the risk of power generation losses or equipment damage due to assessment delays, and significantly improving the accuracy and response speed of distributed PV system O&M management.

[0072] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1.A remote operation and maintenance management system of a distributed photovoltaic system, characterized in that, include: The information acquisition module is used to acquire information from multiple photovoltaic power stations in a distributed photovoltaic system. Monitoring points are set up for each photovoltaic power station, and the information of each photovoltaic power station is collected based on the monitoring points. The information transmission module is used to connect with the information acquisition module, register the monitoring terminal based on the monitoring point, establish a transmission channel between the monitoring terminal and the cloud server, and transmit the site information to the cloud server based on the transmission channel; The operation and maintenance assessment module is used to connect with the information transmission module to obtain the information of each photovoltaic power station from the cloud server and assess the operation and maintenance index of each photovoltaic power station based on the information. The operation and maintenance management module is used to connect with the operation and maintenance assessment module, sort each photovoltaic power station according to the operation and maintenance index, and perform maintenance on each photovoltaic power station in turn; The steps to establish a transmission channel between the monitoring terminal and the cloud server include: The cloud server is divided into storage areas to obtain multiple sub-databases, and connection channels are established between each monitoring terminal and the corresponding sub-database; A transmission line is set up based on the connection channel, wherein multiple guide points are evenly arranged in the transmission line; the connection relationship between the multiple guide points is established based on the transmission line to obtain an independent connection channel; Set up tracking disks for multiple monitoring terminals and establish a common connection channel between the tracking disks and the cloud server; establish the association between the common connection channel and the independent connection channel; The transmission channel between the monitoring terminal and the cloud server is obtained by integrating the public connection channel, the independent connection channel, and the relationship between the public connection channel and the independent connection channel. The steps for setting up tracking disks for multiple monitoring terminals and establishing a public connection channel between the tracking disks and the cloud server include: Multiple monitoring terminals are connected sequentially to form a monitoring network. The monitoring network is then mapped to obtain a tracking disk, which includes multiple tracking points, each of which is a mapping point of the monitoring terminal in the tracking disk. Establish a common connection channel between the tracking disk and the cloud server. The common connection channel includes a main channel and multiple pairs of sub-channels. The sub-channels at both ends of the main channel are set in pairs, and the other end of each pair of sub-channels is connected to the tracking point and the sub-database, respectively. 2.The remote operation and maintenance management system of a distributed photovoltaic system according to claim 1, characterized in that: The steps of acquiring information about multiple photovoltaic (PV) power stations in a distributed photovoltaic (PV) system, deploying monitoring points at each PV power station, and collecting information about each PV power station based on these monitoring points include: Acquire multiple photovoltaic power stations of a distributed photovoltaic system and set up monitoring points for each photovoltaic power station; Information is linked between monitoring points and photovoltaic power plant information, and information about each photovoltaic power plant is collected based on the monitoring points. 3.The remote operation and maintenance management system of a distributed photovoltaic system according to claim 1, characterized in that: The steps for establishing the association between the public connection channel and the independent connection channel include: Based on the independent connection channel, a moving point is set to follow the guide point. There is a one-to-one correspondence between the moving point and the monitoring end, and an association channel is established between the moving point and the tracking point. A unique identifier is assigned to each of the multiple monitoring terminals and multiple sub-databases, and the identifier of the monitoring terminal and the identifier of the corresponding sub-database are used as a pair of identifiers. 4.The remote operation and maintenance management system of a distributed photovoltaic system according to claim 3, characterized in that: The step of transmitting site information to the cloud server based on the transmission channel includes: Based on the monitoring terminal, the information of the photovoltaic power station is packaged into a power station information package; Bind the station information package with the monitoring end for information; copy the station information package based on the monitoring end to obtain a backup information package; Pre-set movement point movement rule information on the transmission line; For the independent connection channel corresponding to the movement point meeting the movement rule information, transmit the station information package to the corresponding sub-database through the independent connection channel; For the independent connection channel corresponding to the movement point not meeting the movement rule information, automatically activate the tracking point corresponding to the independent connection channel with an exception as a target tracking point, determine a target public connection channel based on the target tracking point, and transmit the backup information package to the sub-database of the corresponding monitoring end through the target public connection channel. 5.The remote operation and maintenance management system of a distributed photovoltaic system according to claim 4, characterized in that: The step of automatically activating the tracking point corresponding to the independent connection channel with an exception as a target tracking point, determining a target public connection channel based on the target tracking point, and transmitting the backup information package to the sub-database of the corresponding monitoring end through the target public connection channel for the independent connection channel corresponding to the movement point not meeting the movement rule information includes: Based on the associated channel, obtain the tracking point corresponding to the movement point not meeting the movement rule information as a target tracking point and activate it, and randomly select a pair of sub-channels, connect one of the pair of sub-channels with the target tracking point; Obtain the monitoring end corresponding to the target tracking point as a target monitoring end; Based on the identity of the target monitoring end, obtain the sub-database corresponding to the target monitoring end as a target sub-database; Connect the target sub-database and the other sub-channel in the pair of sub-channels to obtain a target public connection channel; Transmit the backup information package to the target sub-database through the target public connection channel. 6.The remote operation and maintenance management system of a distributed photovoltaic system according to claim 1, characterized in that: The step of obtaining the station information corresponding to each photovoltaic station from the cloud server, and evaluating the operation and maintenance index of each photovoltaic station according to the station information includes: Obtain the monitoring end corresponding to each sub-database in the cloud server, and determine the photovoltaic station corresponding to each sub-database based on the monitoring end; Based on the sub-database, extract the station information in the station information package of each photovoltaic station, and evaluate the operation and maintenance index of each photovoltaic station based on the station information. 7.The remote operation and maintenance management system of a distributed photovoltaic system according to claim 1, characterized in that: The step of sorting each photovoltaic station according to the operation and maintenance index, and sequentially maintaining each photovoltaic station includes: Obtain the operation and maintenance index of each photovoltaic station, sort each photovoltaic station in descending order based on the operation and maintenance index to obtain a primary sorting result; Obtain photovoltaic station information with faults, and evaluate the fault emergency degree, insert the photovoltaic station into the primary sorting result based on the fault emergency degree to obtain a station sorting result; Based on the station sorting result, sequentially maintain each photovoltaic station.

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