A photovoltaic backwash water supply system control method and system

Abstract

The present invention discloses a photovoltaic backwashing water supply system control method and system, which relates to the technical field of water supply system control, including setting a backwashing monitoring cycle, an initial backwashing triggering condition and a backwashing control relationship; generating a backwashing index through direct parameters and indirect parameters of the photovoltaic system in the previous backwashing monitoring cycle; if a positive flushing event occurs, adjusting the initial backwashing triggering condition of the next backwashing monitoring cycle according to the positive flushing event and the backwashing index in the previous backwashing monitoring cycle; when the standard backwashing triggering condition is met, starting and controlling the backwashing according to the backwashing control relationship. The backwashing triggering condition is dynamically adjusted, and the backwashing is started and controlled according to the backwashing control relationship, which improves the backwashing effect and ensures the adaptability of the backwashing control, providing a solid foundation for the efficient and stable operation of photovoltaics.

Description

Technical Field

[0001] The present invention relates to the technical field of water supply system regulation and control, and in particular to a photovoltaic backwashing water supply system regulation and control method and system. Background Art

[0002] As the core component of photovoltaic power stations, photovoltaic panels are easily corroded by pollutants such as dust, bird droppings, and oil stains. These pollutants will block sunlight from shining on photovoltaic panels, reduce the light transmittance of photovoltaic panels, and thus lead to a significant decrease in power generation efficiency. According to research, dust accumulation on photovoltaic panels can reduce power generation efficiency by 7%-40%, and the economic losses caused by this can reach hundreds of millions of yuan each year. In addition, pollutants may also cause a "hot spot effect", causing damage to photovoltaic panels and further shortening their service life. Therefore, it is necessary to flush the surface of photovoltaic panels (positive flushing) through water supply equipment or treatment equipment in the water supply system. However, over time, impurities, dirt or particulate matter will accumulate in filters, pipes and other equipment. If these substances are not removed in time, they will affect the normal operation and water quality of the water supply system, thereby affecting the positive flushing effect of the photovoltaic panel surface and reducing the power generation rate. Therefore, backwashing is required. Backwashing uses the principle of reverse flow of water flow. Through specific operations, the water flow is reversed back to the water source or treatment equipment, thereby flushing away impurities, dirt or particulate matter attached to filters, pipes and other equipment.

[0003] In the prior art, backwashing is often started periodically or at a fixed threshold. However, the operating conditions of photovoltaic power generation systems are relatively complex, and regular or fixed threshold backwashing cannot meet the photovoltaic cleaning needs in a timely manner, resulting in poor backwashing effects and low adaptability of backwashing regulation.

[0004] Therefore, how to improve the backwashing effect and regulation adaptability is a technical problem that needs to be solved. Summary of the invention

[0005] The purpose of the present invention is to solve the problems of poor backwashing effect and regulation adaptability in the prior art, and to propose a photovoltaic backwashing water supply system regulation method, the method comprising:

[0006] Obtain the related flushing records of photovoltaic forward flushing and backwashing, intercept the related flushing records of photovoltaic forward flushing and backwashing according to the start and end time nodes of forward flushing and backwashing, so as to determine the photovoltaic records of forward flushing and the photovoltaic records of backwashing respectively, and set the monitoring cycle of forward flushing, initial forward flushing triggering conditions and forward flushing control relationship through the photovoltaic records of forward flushing and the photovoltaic records of backwashing, and set the monitoring cycle of backwashing, initial backwashing triggering conditions and backwashing control relationship;

[0007] Monitor the direct and indirect parameters of the photovoltaic system in real time, and adjust the initial positive flushing trigger conditions in the next positive flushing monitoring cycle through the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle to obtain the standard positive flushing trigger conditions. When the standard positive flushing trigger conditions are met, start and control the positive flushing according to the positive flushing control relationship;

[0008] The backwash index is generated by the direct parameters and indirect parameters of the photovoltaic system in the previous backwash monitoring cycle to determine whether a positive flushing event occurred in the previous backwash monitoring cycle;

[0009] If a positive flushing event occurs, the initial backwashing trigger condition of the next backwashing monitoring cycle is adjusted according to the positive flushing event and backwashing index in the previous backwashing monitoring cycle. If no positive flushing event occurs, the initial backwashing trigger condition of the next backwashing monitoring cycle is adjusted according to the backwashing index in the previous backwashing monitoring cycle, and finally the standard backwashing trigger condition is obtained;

[0010] When the standard backwash triggering conditions are met, backwashing is started and controlled according to the backwash control relationship;

[0011] Among them, the positive flushing of photovoltaics is the flushing process of the water supply system using the water supply equipment to flush the surface of the photovoltaic components, and the backwashing of photovoltaics is the flushing process of the water supply system using the water supply equipment to flush.

[0012] In some embodiments of the present application, photovoltaic forward flushing-backwashing related flushing records are intercepted according to the start and end time nodes of forward flushing and backwashing, so as to respectively determine the photovoltaic records of forward flushing and the photovoltaic records of backwashing, including:

[0013] The photovoltaic records of positive flushing include the photovoltaic records before positive flushing, the photovoltaic records during positive flushing and the photovoltaic records after positive flushing;

[0014] The photovoltaic records in the positive flushing process are determined according to the start and end time nodes of each positive flushing, and the photovoltaic records in a period of time before the start time node of the positive flushing are used as the photovoltaic records before the positive flushing, and the photovoltaic records in a period of time after the end time node of the positive flushing are used as the photovoltaic records after the positive flushing;

[0015] The photovoltaic records of backwashing include the photovoltaic records before backwashing, the photovoltaic records during backwashing and the photovoltaic records after backwashing;

[0016] The photovoltaic records during the backwashing process are determined according to the start and end time nodes of each backwashing. The photovoltaic records in a period of time before the start time node of the backwashing are used as the photovoltaic records before the backwashing, and the photovoltaic records in a period of time after the end time node of the backwashing are used as the photovoltaic records after the backwashing.

[0017] In some embodiments of the present application, the monitoring period of forward flushing, the initial forward flushing triggering condition and the forward flushing control relationship are set through the photovoltaic records of forward flushing and the photovoltaic records of reverse flushing, and the monitoring period of reverse flushing, the initial reverse flushing triggering condition and the reverse flushing control relationship are set, including:

[0018] Photovoltaic records include direct parameters, indirect parameters, control parameters and other parameters;

[0019] Determine the monitoring period of positive flushing according to the time distance between the photovoltaic records in the plurality of positive flushing processes and the time length of the photovoltaic record in each positive flushing process;

[0020] The main parameters and auxiliary parameters that can characterize the surface contamination of photovoltaic modules are screened out from the direct parameters, and the main parameter change curve and auxiliary parameter change curve that change with time are constructed according to the main parameters and auxiliary parameters of multiple photovoltaic records before positive flushing. The intersection value range of the main parameters is determined by comparing multiple main parameter change curves of the same type of main parameters, and the intersection value range of the auxiliary parameters is determined by comparing multiple auxiliary parameter change curves of the same type of auxiliary parameters;

[0021] Determine the point with the most occurrences in the intersection value range of the main parameters and the intersection value range of the auxiliary parameters, and construct the initial positive flushing trigger condition in combination with the positive flushing trigger point or trigger range;

[0022] The forward flushing control effect is described according to the changes of direct parameters and other parameters of the photovoltaic records before and after the forward flushing, and the forward flushing control relationship is constructed according to the control parameters of the photovoltaic records during the forward flushing process and the forward flushing control effect;

[0023] The backwash monitoring cycle, initial backwash triggering conditions and backwash control relationship are set through the photovoltaic records of forward flushing and backwashing.

[0024] In some embodiments of the present application, the monitoring period of backwashing, the initial backwashing triggering condition and the backwashing control relationship are set through the photovoltaic records of forward flushing and the photovoltaic records of backwashing, including:

[0025] According to the time distance between the photovoltaic record before backwashing and the photovoltaic record of forward flushing, the photovoltaic record of backwashing is divided into two categories: photovoltaic record of backwashing without forward flushing and photovoltaic record of backwashing with forward flushing. Among them, the photovoltaic record of backwashing without forward flushing is the photovoltaic record of backwashing far away from forward flushing, and the photovoltaic record of backwashing with forward flushing is the photovoltaic record of backwashing close to forward flushing.

[0026] For the photovoltaic records of backwashing without positive flushing, the first monitoring cycle of backwashing is determined according to the time distance between the photovoltaic records in multiple backwashing processes and the time length of the photovoltaic records in each backwashing process;

[0027] For the photovoltaic records of backwashing with forward flushing, the second monitoring cycle of backwashing is determined according to the time distance between the photovoltaic records in the forward flushing process and the photovoltaic records in the backwashing process, the time length of the photovoltaic records in the forward flushing process and the time length of the photovoltaic records in the backwashing process;

[0028] Determine the monitoring period of backwashing by combining the first monitoring period of backwashing and the second monitoring period of backwashing;

[0029] Indirect parameter types that can characterize water supply equipment blockage or water supply equipment pollution are screened out from the indirect parameters. The initial backwash trigger condition includes a first initial backwash trigger condition and a second initial backwash trigger condition. The first initial backwash trigger condition is that no positive flush event occurred during the monitoring cycle of the previous backwash, and the second initial backwash trigger condition is that a positive flush event occurred during the monitoring cycle of the previous backwash;

[0030] For the photovoltaic record of backwashing without positive flushing, an indirect parameter curve that changes with time is constructed according to the indirect parameters of the photovoltaic record before backwashing, and the intersection of the indirect parameter curves of the same indirect parameter type is determined, and the indirect parameter value with the most occurrences is determined in the intersection of the indirect parameter curves, and the first backwashing trigger range is determined in combination with the trigger point or trigger range of the backwashing, and the first backwashing trigger range is used as the first initial backwashing trigger condition;

[0031] For photovoltaic records with backwashing and positive flushing, the intersection range of direct parameters is determined according to the direct parameters of multiple photovoltaic records of positive flushing, the intersection range of indirect parameters is determined according to the indirect parameters of the photovoltaic records before backwashing, the first backwashing trigger range is eliminated from the intersection range of indirect parameters to obtain the second backwashing trigger range, and the second initial backwashing trigger condition is constructed according to the intersection range of direct parameters, the first backwashing trigger range and the second backwashing trigger range;

[0032] The backwash control relationship is set by the photovoltaic record of the forward flushing and the photovoltaic record of the backwashing.

[0033] In some embodiments of the present application, the backwash control relationship is set by using the photovoltaic record of the forward flushing and the photovoltaic record of the backwashing, including:

[0034] The backwash control relationship includes a first backwash control relationship and a second backwash control relationship. The first backwash control relationship is for a positive flushing event not occurring in a monitoring cycle of the previous backwashing, and the second backwash control relationship is for a positive flushing event occurring in a monitoring cycle of the previous backwashing.

[0035] For the photovoltaic records of backwashing without forward flushing, the changes of indirect parameters and other parameters of the photovoltaic records before backwashing and the photovoltaic records after backwashing are used to describe the backwashing control effect, and the first backwashing control relationship is constructed according to the control parameters of the photovoltaic records during the backwashing process and the backwashing control effect;

[0036] For the photovoltaic records of backwashing with forward flushing, a second backwashing control relationship is constructed according to the control parameters of the photovoltaic records during the forward flushing process, the control parameters of the photovoltaic records during the backwashing process, and the backwashing control effect.

[0037] In some embodiments of the present application, the initial positive flushing triggering condition in the next positive flushing monitoring cycle is adjusted by using the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle, including:

[0038] Analyze the photovoltaic records of positive flushing to determine the standard range and standard variation range of the direct parameters, and calculate the deviation of the direct parameters of the photovoltaic system in the last positive flushing monitoring cycle based on the standard range and standard variation range of the direct parameters;

[0039] If the deviation of the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle exceeds the deviation threshold, the initial positive flushing triggering condition in the next positive flushing monitoring cycle is adjusted according to the difference between the deviation and the deviation threshold;

[0040] Otherwise, the initial positive flush trigger condition in the next positive flush supervision cycle is not adjusted.

[0041] In some embodiments of the present application, a backwash index is generated by using direct parameters and indirect parameters of the photovoltaic system in the previous backwash monitoring cycle, including:

[0042] Standardize direct and indirect parameters and generate backwash indicators;

[0043] ;

[0044] in, is the backwash indicator, is the number of direct parameters, For the The weights of the direct parameters, For the direct parameters, for The maximum value in is the first constant, is the number of indirect parameters, For the The weight of the indirect parameter, For the indirect parameters, for The maximum value in For the The weight of the indirect parameter, For the indirect parameters, for The maximum value in is the second constant.

[0045] In some embodiments of the present application, the initial backwash triggering condition of the next backwash monitoring cycle is adjusted according to the positive flushing event and the backwashing index in the previous backwashing monitoring cycle, including:

[0046] Analyze the photovoltaic records of backwashing to determine the standard range of backwashing indicators, and calculate the backwashing indicator deviation based on the backwashing indicators in the previous backwashing monitoring cycle, and calculate the positive flushing control effect deviation based on the actual positive flushing control effect and the predicted positive flushing control effect of the positive flushing event in the previous backwashing monitoring cycle;

[0047] The backwash deviation is determined by the backwash index deviation and the forward flush control effect deviation in the previous backwash monitoring cycle, and the second initial backwash trigger condition is adjusted by the backwash deviation.

[0048] Correspondingly, the present application also provides a photovoltaic backwash water supply system control system, including:

[0049] The first module is used to obtain the relevant flushing records of photovoltaic forward flushing and backwashing, and intercept the relevant flushing records of photovoltaic forward flushing and backwashing according to the start and end time nodes of forward flushing and backwashing, so as to determine the photovoltaic records of forward flushing and the photovoltaic records of backwashing respectively, and set the monitoring cycle of forward flushing, the initial positive flushing triggering condition and the positive flushing control relationship through the photovoltaic records of forward flushing and the photovoltaic records of backwashing, and set the monitoring cycle of backwashing, the initial backwashing triggering condition and the backwashing control relationship;

[0050] The second module is used to monitor the direct parameters and indirect parameters of the photovoltaic system in real time, and adjust the initial positive flushing trigger conditions in the next positive flushing monitoring cycle through the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle to obtain the standard positive flushing trigger conditions. When the standard positive flushing trigger conditions are met, the positive flushing is started and controlled according to the positive flushing control relationship;

[0051] The third module is used to generate a backwash index through direct parameters and indirect parameters of the photovoltaic system in the previous backwash monitoring cycle to determine whether a positive flushing event occurred in the previous backwash monitoring cycle;

[0052] The fourth module is used to adjust the initial backwash trigger condition of the next backwash monitoring cycle according to the positive flushing event and the backwashing index in the previous backwashing monitoring cycle if a positive flushing event occurs; if no positive flushing event occurs, adjust the initial backwash trigger condition of the next backwash monitoring cycle according to the backwashing index in the previous backwashing monitoring cycle, and finally obtain the standard backwash trigger condition;

[0053] The fifth module is used to start and control backwashing according to the backwashing control relationship when the standard backwashing triggering condition is met;

[0054] Among them, the positive flushing of photovoltaics is the flushing process of the water supply system using the water supply equipment to flush the surface of the photovoltaic components, and the backwashing of photovoltaics is the flushing process of the water supply system using the water supply equipment to flush.

[0055] By applying the above technical scheme, the relevant flushing records of photovoltaic forward flushing and backwashing are obtained, and the relevant flushing records of photovoltaic forward flushing and backwashing are intercepted according to the start and end time nodes of forward flushing and backwashing, so as to determine the photovoltaic records of forward flushing and the photovoltaic records of backwashing respectively, and the monitoring cycle of forward flushing, initial forward flushing trigger conditions and forward flushing control relationship are set through the photovoltaic records of forward flushing and the photovoltaic records of backwashing, and the monitoring cycle of backwashing, initial backwashing trigger conditions and backwashing control relationship are set; the direct parameters and indirect parameters of the photovoltaic system are monitored in real time, and the initial positive flushing trigger conditions in the next positive flushing monitoring cycle are adjusted through the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle, so as to obtain the standard positive flushing trigger conditions, When the standard forward flushing trigger condition is met, forward flushing is started and controlled according to the forward flushing control relationship; a backwashing index is generated through the direct parameters and indirect parameters of the photovoltaic system in the previous backwashing monitoring cycle to determine whether a forward flushing event occurred in the previous backwashing monitoring cycle; if a forward flushing event occurs, the initial backwashing trigger condition of the next backwashing monitoring cycle is adjusted according to the positive flushing event and backwashing index in the previous backwashing monitoring cycle; if no positive flushing event occurs, the initial backwashing trigger condition of the next backwashing monitoring cycle is adjusted according to the backwashing index in the previous backwashing monitoring cycle, and finally the standard backwashing trigger condition is obtained; when the standard backwashing trigger condition is met, backwashing is started and controlled according to the backwashing control relationship. This application sets the monitoring cycle, triggering conditions, control parameters, etc. of forward flushing and backwashing by analyzing the relevant flushing records of photovoltaic forward flushing and backwashing, thereby ensuring the reliability of the original parameter settings of forward and back flushing. The initial backwash trigger conditions of the next backwash monitoring cycle are adjusted according to the positive flushing events and backwashing indicators in the previous backwashing monitoring cycle. The backwashing trigger conditions are dynamically adjusted, and the backwashing is started and controlled according to the backwashing control relationship, which improves the backwashing effect and ensures the adaptability of backwashing regulation, providing a solid foundation for efficient and stable operation of photovoltaics. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A schematic diagram of a photovoltaic backwash water supply system control method proposed by the present invention;

[0057] Figure 2 This is a structural schematic diagram of a photovoltaic backwash water supply system control system proposed by the present invention. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0059] Reference Figure 1 , a photovoltaic backwash water supply system control method, comprising the following steps:

[0060] Step S101, obtain the relevant flushing records of photovoltaic forward flushing and backwashing, intercept the relevant flushing records of photovoltaic forward flushing and backwashing according to the start and end time nodes of forward flushing and backwashing, so as to determine the photovoltaic records of forward flushing and the photovoltaic records of backwashing respectively, and set the monitoring period of forward flushing, initial forward flushing trigger conditions and forward flushing control relationship through the photovoltaic records of forward flushing and the photovoltaic records of backwashing, and set the monitoring period of backwashing, initial backwashing trigger conditions and backwashing control relationship.

[0061] Photovoltaic positive flushing is the flushing process in which the water supply system flushes the surface of the photovoltaic components through the water supply equipment, and photovoltaic backwashing is the flushing process in which the water supply system flushes the water supply equipment.

[0062] In this embodiment, because there is a certain mutual influence between forward flushing and back flushing, the two flushings are analyzed together to determine a more accurate monitoring period of forward flushing, initial forward flushing trigger conditions and forward flushing control relationship, as well as to set the monitoring period of back flushing, initial back flushing trigger conditions and back flushing control relationship. The monitoring period is the detection period of forward and back flushing, and the time between each period is adjacent. The trigger condition is a range of parameter values. When the parameter is detected to fall into the range, forward flushing or back flushing is turned on. The control relationship is a function of direct parameters, indirect parameters, control parameters and control effects. The function outputs specific control parameters. This relationship can be obtained by fitting multiple parameters, or calculated by a corresponding mathematical model, without limiting the specific calculation method.

[0063] In some embodiments of the present application, photovoltaic forward flushing-backwashing related flushing records are intercepted according to the start and end time nodes of forward flushing and backwashing, so as to respectively determine the photovoltaic records of forward flushing and the photovoltaic records of backwashing, including:

[0064] The photovoltaic records of positive flushing include the photovoltaic records before positive flushing, the photovoltaic records during positive flushing and the photovoltaic records after positive flushing;

[0065] The photovoltaic records in the positive flushing process are determined according to the start and end time nodes of each positive flushing, and the photovoltaic records in a period of time before the start time node of the positive flushing are used as the photovoltaic records before the positive flushing, and the photovoltaic records in a period of time after the end time node of the positive flushing are used as the photovoltaic records after the positive flushing;

[0066] The photovoltaic records of backwashing include the photovoltaic records before backwashing, the photovoltaic records during backwashing and the photovoltaic records after backwashing;

[0067] The photovoltaic records during the backwashing process are determined according to the start and end time nodes of each backwashing. The photovoltaic records in a period of time before the start time node of the backwashing are used as the photovoltaic records before the backwashing, and the photovoltaic records in a period of time after the end time node of the backwashing are used as the photovoltaic records after the backwashing.

[0068] In this embodiment, each forward flushing and back flushing event is divided into photovoltaic records of three time stages according to the start and end time nodes of the forward flushing and back flushing.

[0069] In some embodiments of the present application, the monitoring period of forward flushing, the initial forward flushing triggering condition and the forward flushing control relationship are set through the photovoltaic records of forward flushing and the photovoltaic records of reverse flushing, and the monitoring period of reverse flushing, the initial reverse flushing triggering condition and the reverse flushing control relationship are set, including:

[0070] Photovoltaic records include direct parameters, indirect parameters, control parameters and other parameters;

[0071] Determine the monitoring period of positive flushing according to the time distance between the photovoltaic records in the plurality of positive flushing processes and the time length of the photovoltaic record in each positive flushing process;

[0072] The main parameters and auxiliary parameters that can characterize the surface contamination of photovoltaic modules are screened out from the direct parameters, and the main parameter change curve and auxiliary parameter change curve that change with time are constructed according to the main parameters and auxiliary parameters of multiple photovoltaic records before positive flushing. The intersection value range of the main parameters is determined by comparing multiple main parameter change curves of the same type of main parameters, and the intersection value range of the auxiliary parameters is determined by comparing multiple auxiliary parameter change curves of the same type of auxiliary parameters;

[0073] Determine the point with the most occurrences in the intersection value range of the main parameters and the intersection value range of the auxiliary parameters, and construct the initial positive flushing trigger condition in combination with the positive flushing trigger point or trigger range;

[0074] The forward flushing control effect is described according to the changes of direct parameters and other parameters of the photovoltaic records before and after the forward flushing, and the forward flushing control relationship is constructed according to the control parameters of the photovoltaic records during the forward flushing process and the forward flushing control effect;

[0075] The backwash monitoring cycle, initial backwash triggering conditions and backwash control relationship are set through the photovoltaic records of forward flushing and backwashing.

[0076] In this embodiment, photovoltaic records include direct parameters (photovoltaic direct parameters such as power generation efficiency, voltage and current fluctuations, temperature difference between photovoltaic modules and the surrounding environment, pollutant conditions, etc.), indirect parameters (pressure difference, pressure conditions, blockage conditions, pollution conditions, etc. of water supply pipes, filters and other equipment), control parameters (flushing parameters such as flushing time and flushing pressure) and other parameters (other parameters that can characterize the photovoltaic status).

[0077] In this embodiment, the monitoring period of positive flushing is set by comprehensively considering the time distance between photovoltaic records and the duration of photovoltaic records during the positive flushing process. Direct parameters include main parameters and auxiliary parameters. The main parameters are parameters that can represent photovoltaic pollution conditions, dust thickness, etc. The auxiliary parameters are parameters that reflect photovoltaic pollution conditions from the aspects of power generation efficiency, voltage and current fluctuations, and the temperature difference between photovoltaic components and the surrounding environment, because the dirtiness of the photovoltaic surface will affect the auxiliary parameters.

[0078] In this embodiment, the point with the most occurrences is determined in the intersection value domain of the main parameters and the intersection value domain of the auxiliary parameters, and the initial positive flushing trigger condition is constructed in combination with the trigger point or trigger range of positive flushing (the trigger condition of positive flushing in the past history). When the trigger condition is a trigger point, the range value of the point with the most occurrences in the intersection value domain - the trigger point is used as the initial positive flushing trigger condition. When the trigger condition is a trigger range, if the point with the most occurrences in the intersection value domain is within the trigger range, the trigger range is used as the initial positive flushing trigger condition. Otherwise, the point with the most occurrences in the intersection value domain - the range of the farther end point of the trigger range is used as the initial positive flushing trigger condition.

[0079] It is understandable that the initial positive flushing trigger condition may be composed of one or more direct parameters, which may be determined according to the actual situation and all fall within the protection scope of the present application.

[0080] In this embodiment, the forward flushing control relationship is constructed according to the control parameters of the photovoltaic record during the forward flushing process and the forward flushing control effect, and the control relationship is determined by fitting or presetting a mathematical model, which is essentially a function of the control parameters. The same applies to the same part of the subsequent backwashing part.

[0081] In some embodiments of the present application, the monitoring period of backwashing, the initial backwashing triggering condition and the backwashing control relationship are set through the photovoltaic records of forward flushing and the photovoltaic records of backwashing, including:

[0082] According to the time distance between the photovoltaic record before backwashing and the photovoltaic record of forward flushing, the photovoltaic record of backwashing is divided into two categories: photovoltaic record of backwashing without forward flushing and photovoltaic record of backwashing with forward flushing. Among them, the photovoltaic record of backwashing without forward flushing is the photovoltaic record of backwashing far away from forward flushing, and the photovoltaic record of backwashing with forward flushing is the photovoltaic record of backwashing close to forward flushing.

[0083] For the photovoltaic records of backwashing without positive flushing, the first monitoring cycle of backwashing is determined according to the time distance between the photovoltaic records in multiple backwashing processes and the time length of the photovoltaic records in each backwashing process;

[0084] For the photovoltaic records of backwashing with forward flushing, the second monitoring cycle of backwashing is determined according to the time distance between the photovoltaic records in the forward flushing process and the photovoltaic records in the backwashing process, the time length of the photovoltaic records in the forward flushing process and the time length of the photovoltaic records in the backwashing process;

[0085] Determine the monitoring period of backwashing by combining the first monitoring period of backwashing and the second monitoring period of backwashing;

[0086] Indirect parameter types that can characterize water supply equipment blockage or water supply equipment pollution are screened out from the indirect parameters. The initial backwash trigger condition includes a first initial backwash trigger condition and a second initial backwash trigger condition. The first initial backwash trigger condition is that no positive flush event occurred during the monitoring cycle of the previous backwash, and the second initial backwash trigger condition is that a positive flush event occurred during the monitoring cycle of the previous backwash;

[0087] For the photovoltaic record of backwashing without positive flushing, an indirect parameter curve that changes with time is constructed according to the indirect parameters of the photovoltaic record before backwashing, and the intersection of the indirect parameter curves of the same indirect parameter type is determined, and the indirect parameter value with the most occurrences is determined in the intersection of the indirect parameter curves, and the first backwashing trigger range is determined in combination with the trigger point or trigger range of the backwashing, and the first backwashing trigger range is used as the first initial backwashing trigger condition;

[0088] For photovoltaic records with backwashing and positive flushing, the intersection range of direct parameters is determined according to the direct parameters of multiple photovoltaic records of positive flushing, the intersection range of indirect parameters is determined according to the indirect parameters of the photovoltaic records before backwashing, the first backwashing trigger range is eliminated from the intersection range of indirect parameters to obtain the second backwashing trigger range, and the second initial backwashing trigger condition is constructed according to the intersection range of direct parameters, the first backwashing trigger range and the second backwashing trigger range;

[0089] The backwash control relationship is set by the photovoltaic record of the forward flushing and the photovoltaic record of the backwashing.

[0090] In this embodiment, the photovoltaic record of the backwash with positive flushing is the photovoltaic record of the backwashing that is close to the positive flushing, indicating that the positive flushing event and the backwashing event are close to each other. When analyzing the situation of this part, it is necessary to analyze it in combination with the positive flushing event. The second monitoring cycle of the backwashing can be the time from the positive flushing process to the backwashing process + the average of the time lengths of the two processes. The larger one of the first monitoring cycle of the backwashing and the second monitoring cycle of the backwashing is used as the monitoring cycle of the backwashing. This is done to enable more comprehensive detection.

[0091] In this embodiment, the process of determining the first backwash trigger range is the same as the process of determining the initial positive flush trigger condition, which will not be repeated here. Constructing the second initial backwash trigger condition according to the intersection range of direct parameters, the first backwash trigger range and the second backwash trigger range means that only the first backwash trigger range is satisfied (satisfying the indirect parameter requirements), or, the intersection range of direct parameters is satisfied and the second backwash trigger range is satisfied (satisfying the direct parameters and being in the intersection range of indirect parameters), or the intersection range of direct parameters is satisfied and the first backwash trigger range is satisfied (satisfying the direct parameters and being in the intersection range of indirect parameters), and all three situations are the second initial backwash trigger condition.

[0092] In some embodiments of the present application, the backwash control relationship is set by using the photovoltaic record of the forward flushing and the photovoltaic record of the backwashing, including:

[0093] The backwash control relationship includes a first backwash control relationship and a second backwash control relationship. The first backwash control relationship is for a positive flushing event not occurring in a monitoring cycle of the previous backwashing, and the second backwash control relationship is for a positive flushing event occurring in a monitoring cycle of the previous backwashing.

[0094] For the photovoltaic records of backwashing without forward flushing, the changes of indirect parameters and other parameters of the photovoltaic records before backwashing and the photovoltaic records after backwashing are used to describe the backwashing control effect, and the first backwashing control relationship is constructed according to the control parameters of the photovoltaic records during the backwashing process and the backwashing control effect;

[0095] For the photovoltaic records of backwashing with forward flushing, a second backwashing control relationship is constructed according to the control parameters of the photovoltaic records during the forward flushing process, the control parameters of the photovoltaic records during the backwashing process, and the backwashing control effect.

[0096] In this embodiment, the second backwash control relationship is constructed according to the control parameters of the photovoltaic records during the forward flushing process, the control parameters of the photovoltaic records during the backwashing process, and the backwash control effect, and the function of the second backwash control relationship is constructed by considering these parameters.

[0097] Step S102, real-time monitoring of direct parameters and indirect parameters of the photovoltaic system, and adjusting the initial positive flushing trigger conditions in the next positive flushing monitoring cycle through the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle to obtain standard positive flushing trigger conditions. When the standard positive flushing trigger conditions are met, the positive flushing is started and controlled according to the positive flushing control relationship.

[0098] In this embodiment, whether the initial positive flushing triggering condition in the next cycle needs to be adjusted is determined by the direct parameter situation, which includes the range and change of the direct parameter.

[0099] In some embodiments of the present application, the initial positive flushing triggering condition in the next positive flushing monitoring cycle is adjusted by using the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle, including:

[0100] Analyze the photovoltaic records of positive flushing to determine the standard range and standard variation range of the direct parameters, and calculate the deviation of the direct parameters of the photovoltaic system in the last positive flushing monitoring cycle based on the standard range and standard variation range of the direct parameters;

[0101] If the deviation of the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle exceeds the deviation threshold, the initial positive flushing triggering condition in the next positive flushing monitoring cycle is adjusted according to the difference between the deviation and the deviation threshold;

[0102] Otherwise, the initial positive flush trigger condition in the next positive flush supervision cycle is not adjusted.

[0103] In this embodiment, the standard range (value) and standard variation range (value variation) of the stable direct parameter corresponding to the initial positive flush trigger condition are set. When the direct parameter of the previous cycle is within this range, it means that the trigger condition is met, otherwise, it means that it is not met. The initial positive flush trigger condition in the next positive flush monitoring cycle is adjusted according to the difference between the deviation degree and the deviation degree threshold. Different difference values ​​correspond to different adjustment coefficients. The adjustment is performed by multiplying the adjustment coefficient by the range value endpoint of the initial positive flush trigger condition.

[0104] Step S103, generating a backwash index through direct parameters and indirect parameters of the photovoltaic system in the last backwash monitoring cycle, and determining whether a positive flushing event occurred in the last backwash monitoring cycle.

[0105] In this embodiment, in order to improve the reliability of detection, a backwash index is generated by combining direct parameters and indirect parameters, and the detection is judged by the backwash index.

[0106] In some embodiments of the present application, a backwash index is generated by using direct parameters and indirect parameters of the photovoltaic system in the previous backwash monitoring cycle, including:

[0107] Standardize direct and indirect parameters and generate backwash indicators;

[0108] .

[0109] in, is the backwash indicator, is the number of direct parameters, For the The weights of the direct parameters, For the direct parameters, for The maximum value in is the first constant, is the number of indirect parameters, For the The weight of the indirect parameter, For the indirect parameters, for The maximum value in is the second constant.

[0110] In this embodiment, both direct parameters and indirect parameters can reflect the degree of backwashing required, and the backwashing index is used to describe the degree of backwashing required. The integration of direct parameters and indirect parameters is corrected by the maximum influence amount, and the average value is taken to represent the backwashing index.

[0111] Step S104, if a positive flush event occurs, the initial backwash trigger condition of the next backwash monitoring cycle is adjusted according to the positive flush event and the backwash index in the previous backwash monitoring cycle; if no positive flush event occurs, the initial backwash trigger condition of the next backwash monitoring cycle is adjusted according to the backwash index in the previous backwash monitoring cycle, and finally the standard backwash trigger condition is obtained.

[0112] In this embodiment, if a positive flush event occurs, the second initial backwash trigger condition and the second backwash control relationship are used, and the initial backwash trigger condition of the next backwash monitoring cycle is adjusted according to the positive flush event and the backwash index. If no positive flush event occurs, the first initial backwash trigger condition and the first backwash control relationship are used, and the initial backwash trigger condition of the next backwash monitoring cycle is adjusted according to the backwash index.

[0113] It should be noted that the adjusted initial backwash trigger condition is to adjust the first backwash trigger range or the second backwash trigger range, which is the same as the initial forward flush trigger condition.

[0114] In some embodiments of the present application, the initial backwash triggering condition of the next backwash monitoring cycle is adjusted according to the positive flushing event and the backwashing index in the previous backwashing monitoring cycle, including:

[0115] Analyze the photovoltaic records of backwashing to determine the standard range of backwashing indicators, and calculate the backwashing indicator deviation based on the backwashing indicators in the previous backwashing monitoring cycle, and calculate the positive flushing control effect deviation based on the actual positive flushing control effect and the predicted positive flushing control effect of the positive flushing event in the previous backwashing monitoring cycle;

[0116] The backwash deviation is determined by the backwash index deviation and the forward flush control effect deviation in the previous backwash monitoring cycle, and the second initial backwash trigger condition is adjusted by the backwash deviation.

[0117] In this embodiment, the standard range of the backwash index corresponding to the second initial backwash trigger condition is determined. Within this range, it means that the second initial backwash trigger condition does not need to be adjusted. The predicted forward flushing control effect is determined by the forward flushing control relationship, so as to calculate the forward flushing control effect deviation. Combining the backwash index deviation and the forward flushing control effect deviation (weighted sum), different backwash deviations correspond to different adjustment coefficients, and the second initial backwash trigger condition is adjusted by the adjustment coefficient.

[0118] Step S105, when the standard backwash triggering condition is met, backwashing is started and controlled according to the backwashing control relationship.

[0119] By applying the above technical scheme, the relevant flushing records of photovoltaic forward flushing and backwashing are obtained, and the relevant flushing records of photovoltaic forward flushing and backwashing are intercepted according to the start and end time nodes of forward flushing and backwashing, so as to determine the photovoltaic records of forward flushing and the photovoltaic records of backwashing respectively, and the monitoring cycle of forward flushing, initial forward flushing trigger conditions and forward flushing control relationship are set through the photovoltaic records of forward flushing and the photovoltaic records of backwashing, and the monitoring cycle of backwashing, initial backwashing trigger conditions and backwashing control relationship are set; the direct parameters and indirect parameters of the photovoltaic system are monitored in real time, and the initial positive flushing trigger conditions in the next positive flushing monitoring cycle are adjusted through the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle, so as to obtain the standard positive flushing trigger conditions, When the standard forward flushing trigger condition is met, forward flushing is started and controlled according to the forward flushing control relationship; a backwashing index is generated through the direct parameters and indirect parameters of the photovoltaic system in the previous backwashing monitoring cycle to determine whether a forward flushing event occurred in the previous backwashing monitoring cycle; if a forward flushing event occurs, the initial backwashing trigger condition of the next backwashing monitoring cycle is adjusted according to the positive flushing event and backwashing index in the previous backwashing monitoring cycle; if no positive flushing event occurs, the initial backwashing trigger condition of the next backwashing monitoring cycle is adjusted according to the backwashing index in the previous backwashing monitoring cycle, and finally the standard backwashing trigger condition is obtained; when the standard backwashing trigger condition is met, backwashing is started and controlled according to the backwashing control relationship. This application sets the monitoring cycle, triggering conditions, control parameters, etc. of forward flushing and backwashing by analyzing the relevant flushing records of photovoltaic forward flushing and backwashing, thereby ensuring the reliability of the original parameter settings of forward and back flushing. The initial backwash trigger conditions of the next backwash monitoring cycle are adjusted according to the positive flushing events and backwashing indicators in the previous backwashing monitoring cycle. The backwashing trigger conditions are dynamically adjusted, and the backwashing is started and controlled according to the backwashing control relationship, which improves the backwashing effect and ensures the adaptability of backwashing regulation, providing a solid foundation for efficient and stable operation of photovoltaics.

[0120] Through the description of the above implementation methods, those skilled in the art can clearly understand that the present invention can be implemented by hardware, or by software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each implementation scenario of the present invention.

[0121] Correspondingly, the present application also provides a photovoltaic backwash water supply system control system, such as Figure 2As shown, including:

[0122] The first module is used to obtain the relevant flushing records of photovoltaic forward flushing and backwashing, and intercept the relevant flushing records of photovoltaic forward flushing and backwashing according to the start and end time nodes of forward flushing and backwashing, so as to determine the photovoltaic records of forward flushing and the photovoltaic records of backwashing respectively, and set the monitoring cycle of forward flushing, the initial positive flushing triggering condition and the positive flushing control relationship through the photovoltaic records of forward flushing and the photovoltaic records of backwashing, and set the monitoring cycle of backwashing, the initial backwashing triggering condition and the backwashing control relationship;

[0123] The second module is used to monitor the direct parameters and indirect parameters of the photovoltaic system in real time, and adjust the initial positive flushing trigger conditions in the next positive flushing monitoring cycle through the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle to obtain the standard positive flushing trigger conditions. When the standard positive flushing trigger conditions are met, the positive flushing is started and controlled according to the positive flushing control relationship;

[0124] The third module is used to generate a backwash index through direct parameters and indirect parameters of the photovoltaic system in the previous backwash monitoring cycle to determine whether a positive flushing event occurred in the previous backwash monitoring cycle;

[0125] The fourth module is used to adjust the initial backwash trigger condition of the next backwash monitoring cycle according to the positive flushing event and the backwashing index in the previous backwashing monitoring cycle if a positive flushing event occurs; if no positive flushing event occurs, adjust the initial backwash trigger condition of the next backwash monitoring cycle according to the backwashing index in the previous backwashing monitoring cycle, and finally obtain the standard backwash trigger condition;

[0126] The fifth module is used to start and control backwashing according to the backwashing control relationship when the standard backwashing triggering condition is met;

[0127] Among them, the positive flushing of photovoltaics is the flushing process of the water supply system using the water supply equipment to flush the surface of the photovoltaic components, and the backwashing of photovoltaics is the flushing process of the water supply system using the water supply equipment to flush.

[0128] Those skilled in the art will appreciate that the modules in the system in the implementation scenario can be distributed in the system of the implementation scenario according to the implementation scenario description, or can be changed accordingly and located in one or more systems different from the implementation scenario. The modules in the above implementation scenario can be combined into one module, or can be further split into multiple submodules.

[0129] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A photovoltaic backwash water supply system control method, characterized in that: include: Obtain the related flushing records of photovoltaic forward flushing and backwashing, intercept the related flushing records of photovoltaic forward flushing and backwashing according to the start and end time nodes of forward flushing and backwashing, so as to determine the photovoltaic records of forward flushing and the photovoltaic records of backwashing respectively, and set the monitoring cycle of forward flushing, initial forward flushing triggering conditions and forward flushing control relationship through the photovoltaic records of forward flushing and the photovoltaic records of backwashing, and set the monitoring cycle of backwashing, initial backwashing triggering conditions and backwashing control relationship; Monitor the direct and indirect parameters of the photovoltaic system in real time, and adjust the initial positive flushing trigger conditions in the next positive flushing monitoring cycle through the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle to obtain the standard positive flushing trigger conditions. When the standard positive flushing trigger conditions are met, start and control the positive flushing according to the positive flushing control relationship; The backwash index is generated by the direct parameters and indirect parameters of the photovoltaic system in the previous backwash monitoring cycle to determine whether a positive flushing event occurred in the previous backwash monitoring cycle; If a positive flushing event occurs, the initial backwashing trigger condition of the next backwashing monitoring cycle is adjusted according to the positive flushing event and backwashing index in the previous backwashing monitoring cycle. If no positive flushing event occurs, the initial backwashing trigger condition of the next backwashing monitoring cycle is adjusted according to the backwashing index in the previous backwashing monitoring cycle, and finally the standard backwashing trigger condition is obtained; When the standard backwash triggering conditions are met, backwashing is started and controlled according to the backwash control relationship; Among them, the positive flushing of photovoltaics is the flushing process of the water supply system using the water supply equipment to flush the surface of the photovoltaic components, and the backwashing of photovoltaics is the flushing process of the water supply system using the water supply equipment to flush the water supply equipment. Direct parameters include power generation efficiency, voltage and current fluctuations, temperature difference between photovoltaic components and the surrounding environment, and pollutant conditions. Indirect parameters include water supply pipes, filter equipment pressure difference, pressure conditions, blockage conditions, and pollution conditions.

2. The photovoltaic backwash water supply system control method according to claim 1, characterized in that: According to the start and end time nodes of forward flushing and backwashing, the relevant flushing records of photovoltaic forward flushing and backwashing are intercepted to determine the photovoltaic records of forward flushing and backwashing respectively, including: The photovoltaic records of positive flushing include the photovoltaic records before positive flushing, the photovoltaic records during positive flushing and the photovoltaic records after positive flushing; The photovoltaic records in the positive flushing process are determined according to the start and end time nodes of each positive flushing, and the photovoltaic records in a period of time before the start time node of the positive flushing are used as the photovoltaic records before the positive flushing, and the photovoltaic records in a period of time after the end time node of the positive flushing are used as the photovoltaic records after the positive flushing; The photovoltaic records of backwashing include the photovoltaic records before backwashing, the photovoltaic records during backwashing and the photovoltaic records after backwashing; The photovoltaic records during the backwashing process are determined according to the start and end time nodes of each backwashing. The photovoltaic records in a period of time before the start time node of the backwashing are used as the photovoltaic records before the backwashing, and the photovoltaic records in a period of time after the end time node of the backwashing are used as the photovoltaic records after the backwashing.

3. The photovoltaic backwash water supply system control method according to claim 2, characterized in that: The monitoring cycle of forward flushing, the initial forward flushing triggering condition and the forward flushing control relationship are set through the photovoltaic records of forward flushing and the photovoltaic records of back flushing, and the monitoring cycle of back flushing, the initial back flushing triggering condition and the back flushing control relationship are set, including: Photovoltaic records include direct parameters, indirect parameters, control parameters and other parameters; Determine the monitoring period of positive flushing according to the time distance between the photovoltaic records in the plurality of positive flushing processes and the time length of the photovoltaic record in each positive flushing process; The main parameters and auxiliary parameters that can characterize the surface contamination of photovoltaic modules are screened out from the direct parameters, and the main parameter change curve and auxiliary parameter change curve that change with time are constructed according to the main parameters and auxiliary parameters of multiple photovoltaic records before positive flushing. The intersection value range of the main parameters is determined by comparing multiple main parameter change curves of the same type of main parameters, and the intersection value range of the auxiliary parameters is determined by comparing multiple auxiliary parameter change curves of the same type of auxiliary parameters; Determine the point with the most occurrences in the intersection value range of the main parameters and the intersection value range of the auxiliary parameters, and construct the initial positive flushing trigger condition in combination with the positive flushing trigger point or trigger range; The forward flushing control effect is described according to the changes of direct parameters and other parameters of the photovoltaic records before and after the forward flushing, and the forward flushing control relationship is constructed according to the control parameters of the photovoltaic records during the forward flushing process and the forward flushing control effect; The backwash monitoring cycle, initial backwash triggering conditions and backwash control relationship are set through the photovoltaic records of forward flushing and backwashing.

4. The photovoltaic backwash water supply system control method according to claim 3 is characterized in that: The backwash monitoring cycle, initial backwash trigger conditions and backwash control relationship are set through the forward flushing photovoltaic records and the backwashing photovoltaic records, including: According to the time distance between the photovoltaic record before backwashing and the photovoltaic record of forward flushing, the photovoltaic record of backwashing is divided into two categories: photovoltaic record of backwashing without forward flushing and photovoltaic record of backwashing with forward flushing. Among them, the photovoltaic record of backwashing without forward flushing is the photovoltaic record of backwashing far away from forward flushing, and the photovoltaic record of backwashing with forward flushing is the photovoltaic record of backwashing close to forward flushing. For the photovoltaic records of backwashing without positive flushing, the first monitoring cycle of backwashing is determined according to the time distance between the photovoltaic records in multiple backwashing processes and the time length of the photovoltaic records in each backwashing process; For the photovoltaic records of backwashing with forward flushing, the second monitoring cycle of backwashing is determined according to the time distance between the photovoltaic records in the forward flushing process and the photovoltaic records in the backwashing process, the time length of the photovoltaic records in the forward flushing process and the time length of the photovoltaic records in the backwashing process; Determine the monitoring period of backwashing by combining the first monitoring period of backwashing and the second monitoring period of backwashing; Indirect parameter types that can characterize water supply equipment blockage or water supply equipment pollution are screened out from the indirect parameters. The initial backwash trigger condition includes a first initial backwash trigger condition and a second initial backwash trigger condition. The first initial backwash trigger condition is that no positive flush event occurred during the monitoring cycle of the previous backwash, and the second initial backwash trigger condition is that a positive flush event occurred during the monitoring cycle of the previous backwash; For the photovoltaic record of backwashing without positive flushing, an indirect parameter curve that changes with time is constructed according to the indirect parameters of the photovoltaic record before backwashing, and the intersection of the indirect parameter curves of the same indirect parameter type is determined, and the indirect parameter value with the most occurrences is determined in the intersection of the indirect parameter curves, and the first backwashing trigger range is determined in combination with the trigger point or trigger range of the backwashing, and the first backwashing trigger range is used as the first initial backwashing trigger condition; For photovoltaic records with backwashing and positive flushing, the intersection range of direct parameters is determined according to the direct parameters of multiple photovoltaic records of positive flushing, the intersection range of indirect parameters is determined according to the indirect parameters of the photovoltaic records before backwashing, the first backwashing trigger range is eliminated from the intersection range of indirect parameters to obtain the second backwashing trigger range, and the second initial backwashing trigger condition is constructed according to the intersection range of direct parameters, the first backwashing trigger range and the second backwashing trigger range; The backwash control relationship is set by the photovoltaic record of the forward flushing and the photovoltaic record of the backwashing.

5. The photovoltaic backwash water supply system control method according to claim 4, characterized in that: The backwash control relationship is set through the photovoltaic records of positive flushing and the photovoltaic records of backwashing, including: The backwash control relationship includes a first backwash control relationship and a second backwash control relationship. The first backwash control relationship is for a positive flushing event not occurring in a monitoring cycle of the previous backwashing, and the second backwash control relationship is for a positive flushing event occurring in a monitoring cycle of the previous backwashing. For the photovoltaic records of backwashing without forward flushing, the changes of indirect parameters and other parameters of the photovoltaic records before backwashing and the photovoltaic records after backwashing are used to describe the backwashing control effect, and the first backwashing control relationship is constructed according to the control parameters of the photovoltaic records during the backwashing process and the backwashing control effect; For the photovoltaic records of backwashing with forward flushing, a second backwashing control relationship is constructed according to the control parameters of the photovoltaic records during the forward flushing process, the control parameters of the photovoltaic records during the backwashing process, and the backwashing control effect.

6. The photovoltaic backwash water supply system control method according to claim 1, characterized in that: And the initial positive flushing triggering conditions in the next positive flushing monitoring cycle are adjusted by the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle, including: Analyze the photovoltaic records of positive flushing to determine the standard range and standard variation range of the direct parameters, and calculate the deviation of the direct parameters of the photovoltaic system in the last positive flushing monitoring cycle based on the standard range and standard variation range of the direct parameters; If the deviation of the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle exceeds the deviation threshold, the initial positive flushing triggering condition in the next positive flushing monitoring cycle is adjusted according to the difference between the deviation and the deviation threshold; Otherwise, the initial positive flush trigger condition in the next positive flush supervision cycle is not adjusted.

7. The photovoltaic backwash water supply system control method according to claim 1, characterized in that: The backwash index is generated by direct and indirect parameters of the PV system during the previous backwash monitoring cycle, including: Standardize direct and indirect parameters and generate backwash indicators; ； in, is the backwash indicator, is the number of direct parameters, For the The weights of the direct parameters, For the direct parameters, for The maximum value in is the first constant, is the number of indirect parameters, is the weight of the jth indirect parameter, is the jth indirect parameter, for The maximum value in is the second constant.

8. The photovoltaic backwash water supply system control method according to claim 4, characterized in that: The initial backwash triggering conditions of the next backwash monitoring cycle are adjusted according to the positive flushing events and backwashing indicators in the previous backwashing monitoring cycle, including: Analyze the photovoltaic records of backwashing to determine the standard range of backwashing indicators, and calculate the backwashing indicator deviation based on the backwashing indicators in the previous backwashing monitoring cycle, and calculate the positive flushing control effect deviation based on the actual positive flushing control effect and the predicted positive flushing control effect of the positive flushing event in the previous backwashing monitoring cycle; The backwash deviation is determined by the backwash index deviation and the forward flush control effect deviation in the previous backwash monitoring cycle, and the second initial backwash trigger condition is adjusted by the backwash deviation.

9. A photovoltaic backwash water supply system control system, characterized in that: include: The first module is used to obtain the relevant flushing records of photovoltaic forward flushing and backwashing, and intercept the relevant flushing records of photovoltaic forward flushing and backwashing according to the start and end time nodes of forward flushing and backwashing, so as to determine the photovoltaic records of forward flushing and the photovoltaic records of backwashing respectively, and set the monitoring cycle of forward flushing, the initial positive flushing triggering condition and the positive flushing control relationship through the photovoltaic records of forward flushing and the photovoltaic records of backwashing, and set the monitoring cycle of backwashing, the initial backwashing triggering condition and the backwashing control relationship; The second module is used to monitor the direct parameters and indirect parameters of the photovoltaic system in real time, and adjust the initial positive flushing trigger conditions in the next positive flushing monitoring cycle through the direct parameters of the photovoltaic system in the previous positive flushing monitoring cycle to obtain the standard positive flushing trigger conditions. When the standard positive flushing trigger conditions are met, the positive flushing is started and controlled according to the positive flushing control relationship; The third module is used to generate a backwash index through direct parameters and indirect parameters of the photovoltaic system in the previous backwash monitoring cycle to determine whether a positive flushing event occurred in the previous backwash monitoring cycle; The fourth module is used to adjust the initial backwash trigger condition of the next backwash monitoring cycle according to the positive flushing event and the backwashing index in the previous backwashing monitoring cycle if a positive flushing event occurs; if no positive flushing event occurs, adjust the initial backwash trigger condition of the next backwash monitoring cycle according to the backwashing index in the previous backwashing monitoring cycle, and finally obtain the standard backwash trigger condition; The fifth module is used to start and control backwashing according to the backwashing control relationship when the standard backwashing triggering condition is met; Among them, the positive flushing of photovoltaics is the flushing process of the water supply system using the water supply equipment to flush the surface of the photovoltaic components, and the backwashing of photovoltaics is the flushing process of the water supply system using the water supply equipment to flush.

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