An intelligent control system for photovoltaic street lights

Abstract

The present invention discloses an intelligent control system for photovoltaic street lamps, which relates to the technical field of photovoltaic street lamp control. The present invention includes a number of photovoltaic street lamps and an intelligent scheduling module. The photovoltaic street lamp includes a collection module, an execution module, a power generation module, an energy storage module and a lighting module. The power generation module converts the light energy during the day into electrical energy and stores it in the energy storage module. The energy storage module transmits the stored electrical energy to the lighting module at night. The lighting module converts the electrical energy into light energy again to illuminate the road. The collection module collects the power generation power information of the power generation module, the remaining power information of the energy storage module and the load power consumption information of the lighting module. By implementing different scheduling strategies, the present invention classifies the photovoltaic street lamps, and can continuously optimize the energy storage gap between each photovoltaic street lamp, thereby avoiding the lighting gap caused by the lack of electrical energy in individual photovoltaic street lamps and ensuring the road lighting quality.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic street lamp control, and particularly to an intelligent control system for photovoltaic street lamps. Background Art

[0002] A photovoltaic street lamp is a street lamp that uses solar energy for lighting, which combines photovoltaic technology and lighting technology; photovoltaic technology is a technology that uses semiconductor materials to convert solar energy into electrical energy. In a photovoltaic street lamp, a photovoltaic panel is usually used to absorb solar energy and convert it into direct current electricity, which is stored during the day for use in lighting at night. In terms of lighting technology, LED lamps are usually used as light sources in photovoltaic street lamps. LEDs have the characteristics of excellent lighting effects and energy saving, and combined with photovoltaic power generation, a self-sufficient lighting system can be achieved.

[0003] The lighting effect of photovoltaic street lamps is mainly affected by the photovoltaic panel and the energy storage device. Due to the different locations where photovoltaic street lamps are distributed, the photovoltaic panel will be affected by many factors such as light intensity, obstacles, and light angle, which indirectly leads to different power generation powers of different photovoltaic street lamps during the day. Some street lamps with too low photovoltaic power generation cannot store enough electrical energy to meet the lighting needs at night. Therefore, designing an intelligent control system to achieve power scheduling between street lamps to ensure lighting needs is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an intelligent control system for photovoltaic street lamps, which solves the problems raised in the above background art.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An intelligent control system for photovoltaic street lamps includes n photovoltaic street lamps and an intelligent scheduling module. The photovoltaic street lamp includes a collection module, an execution module, a power generation module, an energy storage module, and a lighting module;

[0006] The power generation module converts the light energy during the day into electrical energy and stores it in the energy storage module. The energy storage module transmits the stored electrical energy to the lighting module at night, and the lighting module converts the electrical energy back into light energy to illuminate the road;

[0007] The collection module collects the power generation power information of the power generation module, the remaining power information of the energy storage module, and the load power consumption information of the lighting module, and uploads the collected power generation power information, load power consumption information, and remaining power information to the intelligent scheduling module;

[0008] The intelligent scheduling module analyzes the current data information and sends a scheduling strategy to the execution module. The execution module performs scheduling control on the energy storage module and the lighting module respectively according to the scheduling strategy. The execution result after the execution module's scheduling control is collected again by the acquisition module and fed back to the intelligent scheduling module;

[0009] Among them, the intelligent scheduling module divides the daytime power generation time interval of the power generation module into two stages. The two stages of the power generation module are the first-stage power generation analysis and the second-stage power generation analysis. The intelligent scheduling module divides into two scheduling strategies according to the daytime power generation time of the energy storage module. The two scheduling strategies of the energy storage module are the first-level energy storage scheduling strategy and the second-level energy storage scheduling strategy. The intelligent scheduling module also divides into two scheduling strategies according to the nighttime lighting time of the energy storage module. The two scheduling strategies of the energy storage module are the third-level energy storage scheduling strategy and the fourth-level energy storage scheduling strategy. The intelligent scheduling module divides into two scheduling strategies according to the nighttime lighting time of the lighting module. The two scheduling strategies of the lighting module are the first-level lighting scheduling strategy and the second-level lighting scheduling strategy;

[0010] The intelligent scheduling module divides all photovoltaic street lamps into two categories: single photovoltaic street lamps and multiple photovoltaic street lamps. When the number of photovoltaic street lamps is greater than or equal to two, it is a multiple photovoltaic street lamp. The intelligent scheduling module classifies several photovoltaic street lamps to facilitate the execution module to execute the scheduling strategy;

[0011] The second-stage power generation analysis and the first-level energy storage scheduling strategy are carried out simultaneously. The third-level energy storage scheduling strategy and the first-level lighting scheduling strategy are carried out simultaneously. The fourth-level energy storage scheduling strategy and the second-level lighting scheduling strategy are carried out simultaneously.

[0012] Further, the specific process of the first-stage power generation analysis is as follows:

[0013] Generate a real-time curve graph with the time unit of seconds based on the power generation power information, and calculate the power generation power volatility of the current power generation module according to the following formula group: Among them, and are the current power generation power and the power generation power of the previous second respectively, is the logarithmic power difference per second, is the number of each data point in the curve graph, is the average value of the data points in the curve graph, is the obtained real-time curve volatility;

[0014] In each of the photovoltaic street lights, the power generation module is affected by factors such as light intensity, light angle, obstacles, and the degree of damage to the photovoltaic panel. The curve volatility of each power generation module is different. In the first-stage power generation analysis, the intelligent scheduling module predicts the power generation of each photovoltaic street light and the time node for entering the second-stage power generation analysis based on the curve volatility of each power generation module. In the second-stage power generation analysis, the intelligent scheduling module uses the same method steps as in the first-stage power generation analysis to obtain the power generation of each photovoltaic street light in the second-stage power generation analysis;

[0015] Send a primary energy storage scheduling strategy to the execution module according to the predicted power generation in the first-stage power generation analysis. At the same time when the second-stage power generation analysis starts, the execution module in each photovoltaic street light performs power scheduling on the energy storage module. The intelligent scheduling module sends a secondary energy storage scheduling strategy to the execution module according to the predicted power generation in the second-stage power generation analysis. Before the end of the second-stage power generation analysis and the start of the primary lighting scheduling strategy, the execution module in each photovoltaic street light performs power scheduling on the energy storage module.

[0016] Further, before the start of the second-stage power generation analysis, the acquisition module feeds back the actual power generation and the predicted power generation of each power generation module to the intelligent scheduling module. The intelligent scheduling module further refines the time interval of the first-stage power generation analysis according to the feedback power generation error value to obtain a refined time interval. The time interval is 10 minutes. The power generation in each refined time interval is multiplied by different weight coefficients to reduce the error of the intelligent scheduling module's prediction of power generation. Through continuous feedback correction, the intelligent scheduling module can better predict the power generation of each power generation module at different time periods.

[0017] Further, in the first-stage power generation analysis, the intelligent scheduling module substitutes the predicted power generation of each power generation module and the predicted power generation of its two adjacent power generation modules into the following formula group for calculation: Where, is the predicted power generation of the current power generation module, is the predicted power generation of the previous power generation module, is the predicted power generation of the next power generation module, is the difference between the current power generation module and its adjacent front and rear power generation modules, is the cumulative difference between the current power generation module and its adjacent front and rear power generation modules; when the value is less than or equal to zero and the value is greater than zero, the corresponding current power generation module is a single photovoltaic street light. When the value and When the values are all greater than zero, the corresponding current power generation module is the starting street lamp or the ending street lamp in the multi-photovoltaic street lamps, that is, the starting street lamp or the ending street lamp is the photovoltaic street lamp at the two ends of the multi-photovoltaic street lamps. When the value of and the value of

[0018] are both less than or equal to zero, the corresponding current power generation module is the middle street lamp in the multi-photovoltaic street lamps except for the starting street lamp and the ending street lamp.

[0019] Further, in the implementation of the first-level energy storage scheduling strategy by the execution module, the power transmission between the photovoltaic street lamps is 16% of the transmission ratio of the energy storage module of the photovoltaic street lamp itself. The single photovoltaic street lamp and the multi-photovoltaic street lamp are divided into two states: peak and valley. The peak state means that the stored power of the single photovoltaic street lamp and the multi-photovoltaic street lamp is greater than the power of the adjacent photovoltaic street lamps on both sides. The valley state means that the stored power of the single photovoltaic street lamp and the multi-photovoltaic street lamp is less than or equal to the power of the adjacent photovoltaic street lamps on both sides. When the single photovoltaic street lamp is in the peak state, the power is evaluated according to the exponential function based on its own power, and the power obtained from the result is transmitted to the photovoltaic street lamps in the left and right directions. The exponent in the exponential function is 0.5. It should be noted that the more the number of separated photovoltaic street lamps, the less the transmitted power. In addition, within the power transmission coverage range of the left and right of the single photovoltaic street lamp, if there is a photovoltaic street lamp energy storage module with a power higher than or equal to that of the single photovoltaic street lamp, the power transmission range stops at the photovoltaic street lamp with a higher power. When the single photovoltaic street lamp is in the valley state, the adjacent photovoltaic street lamps on the left and right transmit 20% of their own power to the middle single photovoltaic street lamp. When the multi-photovoltaic street lamp is in the peak state, the power is transmitted to the single photovoltaic street lamp or the multi-photovoltaic street lamp in the left and right directions according to the exponential function. The average value of the overall power of the multi-photovoltaic street lamp is substituted into the exponential function for evaluation, and the power obtained from the result is transmitted to the single photovoltaic street lamp or the multi-photovoltaic street lamp in the left and right directions. The exponent in the exponential function is 0.3. In addition, within the power transmission coverage range of the left and right of the multi-photovoltaic street lamp, if there is a photovoltaic street lamp energy storage module with a power higher than or equal to the average value of the overall power of the multi-photovoltaic street lamp, the power transmission range stops at the photovoltaic street lamp with a higher power. When the multi-photovoltaic street lamp is in the valley state, the power is transmitted from the other multi-photovoltaic street lamp with a higher power and the closest distance from the left and right to the multi-photovoltaic street lamp in the valley state. The multi-photovoltaic street lamp with a higher power transmits 15% of the average value of the overall power to the multi-photovoltaic street lamp in the valley state. When the power transmission is not completed, if the first-level energy storage scheduling strategy ends, the execution module controls the power transmission to stop execution.

[0019] Further, in the implementation of the second-level energy storage scheduling strategy by the execution module, the power transmission between the photovoltaic street lamps is 95% of the transmission ratio of the energy storage module of the photovoltaic street lamp itself. The implementation method of the second-level energy storage scheduling strategy is the same as that of the first-level energy storage scheduling strategy except for the different transmission ratios.

[0020] Further, in the three - level energy storage scheduling strategy, the power transmission between the photovoltaic street lamps is 24% of the transmission ratio of the energy storage module of each photovoltaic street lamp itself. The implementation methods of the three - level energy storage scheduling strategy and the first - level energy storage scheduling strategy are the same except for the different transmission ratios. In the first - level lighting scheduling strategy, the execution module controls the lighting module in each photovoltaic street lamp to illuminate at 85% of the rated power, reserving 15% of the power redundancy to improve stability. Since the lighting modules of each photovoltaic street lamp are affected by temperature, internal resistance, and damaged components, the actual load power consumption information is different. The intelligent scheduling module calculates the time for the energy storage module to continuously supply power based on the load power consumption information of the lighting module provided by the acquisition module. When half of the time for the energy storage module to continuously supply power has passed, the intelligent scheduling module sends the four - level energy storage scheduling strategy and the second - level lighting scheduling strategy to the execution module, and the execution module simultaneously executes the four - level energy storage scheduling strategy and the second - level lighting scheduling strategy.

[0021] Further, in the four - level energy storage scheduling strategy, when the difference in the remaining power of the energy storage modules between adjacent photovoltaic street lamps is greater than 10% of their own power, the energy storage module with a higher power transmits power to the adjacent energy storage module with a lower power. The power transmission between the photovoltaic street lamps is 8% of the transmission ratio of the energy storage module of each photovoltaic street lamp itself, and no power transmission occurs between the energy storage modules of the remaining photovoltaic street lamps; in the second - level lighting strategy, the lighting module and the lighting modules of adjacent photovoltaic street lamps illuminate at 75% and 50% of the rated power respectively, and they are alternately replaced every 1 hour. When the acquisition module collects the power generation power information generated by the power generation module again, the intelligent scheduling module sends a termination command for the four - level energy storage scheduling strategy and the second - level lighting strategy to the execution module, and the execution module controls the lighting module to stop running, and the intelligent scheduling module re - enters the first - stage power generation analysis; if the acquisition module does not collect the power generation power information generated by the power generation module and the remaining power of the energy storage module is less than 20%, the execution module also controls the lighting module to stop running.

[0022] The present invention has the following beneficial effects:

[0023] 1. The intelligent control system for photovoltaic street lamps can classify the photovoltaic street lamps by executing different scheduling strategies, continuously optimize the energy storage gap between each photovoltaic street lamp, thus avoiding the lighting gap caused by the lack of electric energy in individual photovoltaic street lamps and ensuring the road lighting quality.

[0024] 2. The intelligent control system for photovoltaic street lamps can reduce the power loss during power transmission by changing the current of power transmission. Executing the lighting strategy can minimize the power loss of the lighting module as much as possible, improve the power reserve of the energy storage module, and prevent the insufficient power generation of the power generation module in the future.

[0025] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-described advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0027] Figure 1 is a system block diagram of an intelligent control system for a photovoltaic street lamp according to the present invention;

[0028] Figure 2 is a system block diagram of the intelligent scheduling module and the photovoltaic street lamp according to the present invention;

[0029] Figure 3 is a flowchart of the scheduling strategy according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0031] Please refer to Figures 1-3 , the present invention provides a technical solution: an intelligent control system for a photovoltaic street lamp, including n photovoltaic street lamps and an intelligent scheduling module. The photovoltaic street lamp includes a collection module, an execution module, a power generation module, an energy storage module, and a lighting module;

[0032] The power generation module converts the light energy during the day into electrical energy and stores it in the energy storage module. The energy storage module transmits the stored electrical energy to the lighting module at night, and the lighting module converts the electrical energy into light energy again to illuminate the road;

[0033] The collection module collects the power generation power information of the power generation module, the remaining power information of the energy storage module, and the load power consumption information of the lighting module, and uploads the collected power generation power information, load power consumption information, and remaining power information to the intelligent scheduling module;

[0034] The intelligent scheduling module analyzes the current data information and sends a scheduling strategy to the execution module. The execution module performs scheduling control on the energy storage module and the lighting module respectively according to the scheduling strategy. The execution result after the execution module performs scheduling control is collected again by the collection module and fed back to the intelligent scheduling module;

[0035] Among them, the intelligent scheduling module divides the daytime power generation time interval of the power generation module into two stages. The two stages of the power generation module are the first-stage power generation analysis and the second-stage power generation analysis. The intelligent scheduling module divides the daytime power generation time of the energy storage module into two scheduling strategies. The two scheduling strategies of the energy storage module are the first-level energy storage scheduling strategy and the second-level energy storage scheduling strategy. The intelligent scheduling module also divides the nighttime lighting time of the energy storage module into two scheduling strategies. The two scheduling strategies of the energy storage module are the third-level energy storage scheduling strategy and the fourth-level energy storage scheduling strategy. The intelligent scheduling module divides the nighttime lighting time of the lighting module into two scheduling strategies. The two scheduling strategies of the lighting module are the first-level lighting scheduling strategy and the second-level lighting scheduling strategy;

[0036] By implementing different scheduling strategies, the energy storage gap between each photovoltaic street lamp can be continuously optimized, thereby avoiding the lighting gap caused by the lack of electric energy in individual photovoltaic street lamps and ensuring the road lighting quality.

[0037] The intelligent scheduling module divides all photovoltaic street lamps into two categories: single photovoltaic street lamps and multi-photovoltaic street lamps. When the number of photovoltaic street lamps is greater than or equal to two, it is a multi-photovoltaic street lamp. The intelligent scheduling module classifies several photovoltaic street lamps to facilitate the execution module to execute the scheduling strategy;

[0038] By classifying the photovoltaic street lamps, it can help the intelligent scheduling module further refine the target group of power energy scheduling and further reduce the energy storage gap of each photovoltaic street lamp;

[0039] The second-stage power generation analysis and the first-level energy storage scheduling strategy are carried out simultaneously. The third-level energy storage scheduling strategy and the first-level lighting scheduling strategy are carried out simultaneously. The fourth-level energy storage scheduling strategy and the second-level lighting scheduling strategy are carried out simultaneously.

[0040] Among them, the specific process of the first-stage power generation analysis is as follows:

[0041] Generate a real-time curve graph based on the power generation power information with the time unit of seconds, and calculate the power generation power volatility of the current power generation module according to the following formula group: Among them, and are the current power generation power and the power generation power of the previous second respectively, is the logarithmic power difference per second, is the number of each data point in the curve graph, is the average value of the data points in the curve graph, is the calculated real-time curve volatility;

[0042] In each photovoltaic street lamp, the power generation module is affected by factors such as light intensity, light angle, obstacles, and the degree of damage to the photovoltaic panel. The curve volatility of each power generation module is different. In the first-stage power generation analysis, the intelligent scheduling module predicts the power generation of each photovoltaic street lamp and the time node to enter the second-stage power generation analysis based on the curve volatility of each power generation module. In the second-stage power generation analysis, the intelligent scheduling module uses the same method and steps as in the first-stage power generation analysis to obtain the power generation of each photovoltaic street lamp in the second-stage power generation analysis;

[0043] Send the first-level energy storage scheduling strategy to the execution module according to the predicted power generation in the first-stage power generation analysis. At the same time as the second-stage power generation analysis starts, the execution module in each photovoltaic street lamp conducts power scheduling for the energy storage module. The intelligent scheduling module sends the second-level energy storage scheduling strategy to the execution module according to the predicted power generation in the second-stage power generation analysis. Before the second-stage power generation analysis ends and the first-level lighting scheduling strategy starts, the execution module in each photovoltaic street lamp conducts power scheduling for the energy storage module.

[0044] Among them, before the second-stage power generation analysis starts, the acquisition module feeds back the actual power generation and the predicted power generation of each power generation module to the intelligent scheduling module. The intelligent scheduling module further refines the time interval of the first-stage power generation analysis according to the feedback power generation error value to obtain a refined time interval. The time interval is 10 minutes. In each refined time interval, the power generation is multiplied by different weight coefficients to reduce the error of the intelligent scheduling module's prediction of power generation. Through continuous feedback correction, the intelligent scheduling module can better predict the power generation of each power generation module at different time periods.

[0045] Among them, in the first-stage power generation analysis, the intelligent scheduling module substitutes the predicted power generation of each power generation module and the predicted power generation of its two adjacent power generation modules into the following formula group for calculation: Among them, is the predicted power generation of the current power generation module, is the predicted power generation of the previous power generation module, is the predicted power generation of the next power generation module, is the difference between the adjacent front and rear power generation modules of the current power generation module, is the cumulative difference between the current power generation module and its adjacent front and rear power generation modules; when the value is less than or equal to zero and , the corresponding current power generation module is a single photovoltaic street lamp. When the value of are both greater than zero, the corresponding current power generation module is the starting street lamp or the ending street lamp in the multi-photovoltaic street lamp, that is, the starting street lamp or the ending street lamp is the photovoltaic street lamp at the two ends of the multi-photovoltaic street lamp. When the value of When the values are all less than or equal to zero, the corresponding current power generation module is the middle street lamp among the multiple photovoltaic street lamps excluding the starting street lamp and the ending street lamp.

[0046] Among them, when the execution module implements the first-level energy storage scheduling strategy, the power transmission between photovoltaic street lamps is 16% of the transmission ratio of the energy storage module of the photovoltaic street lamp itself. The energy storage module has a longer power transmission time in the first-level energy storage scheduling strategy, which can reduce the transmitted current to reduce power loss. The single photovoltaic street lamp and the multiple photovoltaic street lamps are divided into two states: peak and trough. The peak means that the stored power of the single photovoltaic street lamp and the multiple photovoltaic street lamps is greater than the power of the adjacent photovoltaic street lamps on both sides, and the trough means that the stored power of the single photovoltaic street lamp and the multiple photovoltaic street lamps is less than or equal to the power of the adjacent photovoltaic street lamps on both sides; in the peak state of the single photovoltaic street lamp, the power is evaluated by substituting the self-power into the exponential function, and the power obtained according to the result is transmitted to the photovoltaic street lamps in the left and right directions. The exponent in the exponential function is 0.5; it should be noted that the more the number of separated photovoltaic street lamps, the less the transmitted power, that is, the power decreases exponentially with the increase of the transmission distance, so as to avoid excessive power loss during transmission; in addition, within the power transmission coverage range of the single photovoltaic street lamp on the left and right, if there is a photovoltaic street lamp energy storage module with a power higher than or equal to that of the single photovoltaic street lamp, the power transmission range stops at the photovoltaic street lamp with a higher power; in the trough state of the single photovoltaic street lamp, the adjacent photovoltaic street lamps on the left and right transmit 20% of their own power to the middle single photovoltaic street lamp; in the peak state of the multiple photovoltaic street lamps, the power is transmitted to the single photovoltaic street lamp or the multiple photovoltaic street lamps in the left and right directions according to the exponential function. The average value of the overall power of the multiple photovoltaic street lamps is substituted into the exponential function for evaluation, and the power obtained according to the result is transmitted to the single photovoltaic street lamp or the multiple photovoltaic street lamps in the left and right directions. The exponent in the exponential function is 0.3; in addition, within the power transmission coverage range of the multiple photovoltaic street lamps on the left and right, if there is a photovoltaic street lamp energy storage module with a power higher than or equal to the average value of the overall power of the multiple photovoltaic street lamps, the power transmission range stops at the photovoltaic street lamp with a higher power; in the trough state of the multiple photovoltaic street lamps, power is transmitted from another multiple photovoltaic street lamp with a higher power and the closest distance from the left and right to the multiple photovoltaic street lamps in the trough state. The multiple photovoltaic street lamp with a higher power transmits 15% of the average value of the overall power to the multiple photovoltaic street lamps in the trough state; when the power transmission is not completed, if the first-level energy storage scheduling strategy ends, the execution module controls the power transmission to stop execution.

[0047] Among them, when the execution module implements the second-level energy storage scheduling strategy, the power transmission between photovoltaic street lamps is 95% of the transmission ratio of the energy storage module of the photovoltaic street lamp itself. The second-level energy storage scheduling strategy is the same as the first-level energy storage scheduling strategy in other implementation methods except for the different transmission ratios; in the second-level energy storage scheduling strategy, the energy storage module is only between the second-stage power generation analysis and the first-level lighting strategy, and is on the verge of evening lighting on the road. The schedulable power is limited, so it is necessary to increase the current of power transmission and complete the power scheduling as much as possible on the premise of increasing a certain amount of power loss.

[0048] Among them, in the three - level energy storage scheduling strategy, the power transmission between photovoltaic street lights is 24% of the transmission ratio of the energy storage module of each photovoltaic street light. The implementation methods of the three - level energy storage scheduling strategy and the first - level energy storage scheduling strategy are the same except for the different transmission ratios. In the first - level lighting scheduling strategy, the execution module controls the lighting module in each photovoltaic street light to illuminate at 85% of the rated power, reserving 15% of the power redundancy to improve stability. Due to the influence of temperature, internal resistance, and damaged components on the lighting module of each photovoltaic street light, the actual load power consumption information is different. The intelligent scheduling module calculates the time for the energy storage module to continuously supply power based on the load power consumption information of the lighting module provided by the acquisition module. When half of the time for the energy storage module to continuously supply power has passed, the intelligent scheduling module sends the four - level energy storage scheduling strategy and the second - level lighting scheduling strategy to the execution module, and the execution module simultaneously executes the four - level energy storage scheduling strategy and the second - level lighting scheduling strategy. The three - level energy storage scheduling strategy and the four - level energy storage scheduling strategy are mainly to ensure lighting while minimizing power consumption as much as possible, increasing the power reserve of the energy storage module, and preventing insufficient power generation of the future power generation module.

[0049] Among them, in the four - level energy storage scheduling strategy, when the difference in the remaining power of the energy storage modules between adjacent photovoltaic street lights is greater than 10% of their own power, the energy storage module with a higher power transmits power to the adjacent energy storage module with a lower power. The power transmission between photovoltaic street lights is 8% of the transmission ratio of the energy storage module of each photovoltaic street light, and no power transmission occurs between the energy storage modules of the remaining photovoltaic street lights. In the second - level lighting strategy, the lighting module and the lighting modules of adjacent photovoltaic street lights illuminate at 75% and 50% of the rated power respectively, and are alternately replaced every 1 hour to reduce power loss while ensuring the quality of road lighting. When the acquisition module collects the power generation power information of the power generation module again, the intelligent scheduling module sends the termination of the four - level energy storage scheduling strategy and the second - level lighting strategy to the execution module, and the execution module controls the lighting module to stop operating, and the intelligent scheduling module re - enters the first - stage power generation analysis. If the acquisition module does not collect the power generation power information of the power generation module and the remaining power of the energy storage module is less than 20%, the execution module also controls the lighting module to stop operating.

[0050] As mentioned above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, should be covered by the protection scope of the present invention.

Claims

1. An intelligent control system for photovoltaic street lights, comprising a number of photovoltaic street lights and an intelligent scheduling module. The photovoltaic street lights include a collection module, an execution module, a power generation module, an energy storage module, and a lighting module; The power generation module converts the light energy during the day into electrical energy and stores it in the energy storage module. The energy storage module transmits the stored electrical energy to the lighting module at night. The lighting module converts the electrical energy back into light energy to illuminate the road. It is characterized in that: The collection module collects the power generation power information of the power generation module, the remaining power information of the energy storage module, and the load power consumption information of the lighting module, and uploads the collected power generation power information, load power consumption information, and remaining power information to the intelligent scheduling module; The intelligent scheduling module analyzes the current data information and sends a scheduling strategy to the execution module. The execution module performs scheduling control on the energy storage module and the lighting module respectively according to the scheduling strategy. The execution result after the execution module's scheduling control is collected again by the collection module and fed back to the intelligent scheduling module; Among them, the intelligent scheduling module divides the time interval of the power generation module's daytime power generation into two stages. The two stages of the power generation module are the first-stage power generation analysis and the second-stage power generation analysis. The intelligent scheduling module divides the scheduling strategies into two types according to the daytime power generation time of the energy storage module. The two scheduling strategies of the energy storage module are the first-level energy storage scheduling strategy and the second-level energy storage scheduling strategy. The intelligent scheduling module also divides the scheduling strategies into two types according to the nighttime lighting time of the energy storage module. The two scheduling strategies of the energy storage module are the third-level energy storage scheduling strategy and the fourth-level energy storage scheduling strategy. The intelligent scheduling module divides the scheduling strategies into two types according to the nighttime lighting time of the lighting module. The two scheduling strategies of the lighting module are the first-level lighting scheduling strategy and the second-level lighting scheduling strategy; The intelligent scheduling module divides all photovoltaic street lights into two categories: single photovoltaic street lights and multi-photovoltaic street lights. When the number of photovoltaic street lights is greater than or equal to two, it is a multi-photovoltaic street light. The intelligent scheduling module classifies a number of photovoltaic street lights to facilitate the execution module to execute the scheduling strategy; The second-stage power generation analysis and the first-level energy storage scheduling strategy are carried out simultaneously. The third-level energy storage scheduling strategy and the first-level lighting scheduling strategy are carried out simultaneously. The fourth-level energy storage scheduling strategy and the second-level lighting scheduling strategy are carried out simultaneously; In the first-stage power generation analysis, the intelligent scheduling module substitutes the predicted power generation of each power generation module and the predicted power generation of its two adjacent power generation modules into the following formula group for calculation: Among them, p x is the predicted power generation of the current power generation module, p (x+1) is the predicted power generation of the previous power generation module, p (x-1) is the predicted power generation of the next power generation module, p e is the difference between the adjacent front and rear power generation modules of the current power generation module, p r is the cumulative difference between the current power generation module and its adjacent front and rear power generation modules; when p e value is less than or equal to zero and p r value is greater than zero, the corresponding current power generation module is a single photovoltaic street lamp. When p e value and p r value are both greater than zero, the corresponding current power generation module is the starting street lamp or the ending street lamp in the multi-photovoltaic street lamps. When p e value and p r value are both less than or equal to zero, the corresponding current power generation module is the middle street lamp in the multi-photovoltaic street lamps excluding the starting street lamp and the ending street lamp; In the implementation of the primary energy storage scheduling strategy by the execution module, the power transmission between the photovoltaic street lamps is 16% of the transmission ratio of the energy storage module of the photovoltaic street lamp itself. The single photovoltaic street lamp and the multi-photovoltaic street lamps are divided into two states: peak and valley. The peak state means that the electricity stored in the single photovoltaic street lamp and the multi-photovoltaic street lamps is greater than that of the adjacent photovoltaic street lamps on both sides. The valley state means that the electricity stored in the single photovoltaic street lamp and the multi-photovoltaic street lamps is less than or equal to that of the adjacent photovoltaic street lamps on both sides. When the single photovoltaic street lamp is in the peak state, the electricity is evaluated by substituting its own electricity into the exponential function, and the electricity is transmitted to the photovoltaic street lamps in the left and right directions according to the electricity obtained from the result. Within the range covered by the power transmission of the single photovoltaic street lamp to the left and right, if there is a photovoltaic street lamp energy storage module with a power higher than or equal to that of the single photovoltaic street lamp, the power transmission range stops at the photovoltaic street lamp with a higher power. When the single photovoltaic street lamp is in the valley state, the adjacent photovoltaic street lamps on the left and right transmit 20% of their own electricity to the single photovoltaic street lamp in the middle. When the multi-photovoltaic street lamps are in the peak state, the electricity is transmitted to the single photovoltaic street lamps or multi-photovoltaic street lamps in the left and right directions according to the exponential function. The average value of the overall electricity of the multi-photovoltaic street lamps is substituted into the exponential function for evaluation, and the electricity is transmitted to the single photovoltaic street lamps or multi-photovoltaic street lamps in the left and right directions according to the electricity obtained from the result. Within the range covered by the power transmission of the multi-photovoltaic street lamps to the left and right, if there is a photovoltaic street lamp energy storage module with a power higher than or equal to the average value of the overall electricity of the multi-photovoltaic street lamps, the power transmission range stops at the photovoltaic street lamp with a higher power. When the multi-photovoltaic street lamps are in the valley state, the electricity is transmitted from another multi-photovoltaic street lamp with a higher power and the closest distance to the left and right to the multi-photovoltaic street lamps in the valley state, and the multi-photovoltaic street lamp with a higher power transmits 15% of the average value of the overall electricity to the multi-photovoltaic street lamps in the valley state. When the power transmission is not completed, if the primary energy storage scheduling strategy ends, the execution module controls the power transmission to stop execution.

2. The intelligent control system for a photovoltaic street lamp according to claim 1, characterized in that, The specific process of the first-stage power generation analysis is as follows: A real-time curve graph is generated based on the power generation power information with the time unit of seconds as the node, and the power generation power volatility of the current power generation module is calculated according to the following formula group: Among them, S i and S i-1 are the current power generation power and the power generation power of the previous second respectively, μ i is the logarithmic power difference per second, m is the number of each data point in the curve graph, is the average value of the data points in the curve graph, and σ is the real-time curve volatility obtained; The curve volatility of each power generation module is different. In the first-stage power generation analysis, the intelligent scheduling module predicts the power generation of each photovoltaic street lamp and the time node for entering the second-stage power generation analysis according to the curve volatility of each power generation module. In the second-stage power generation analysis, the intelligent scheduling module uses the same method steps as in the first-stage power generation analysis to obtain the power generation of each photovoltaic street lamp in the second-stage power generation analysis. The primary energy storage scheduling strategy is sent to the execution module according to the predicted power generation in the first-stage power generation analysis. At the same time when the second-stage power generation analysis starts, the execution module in each photovoltaic street lamp performs power scheduling on the energy storage module. The intelligent scheduling module sends the secondary energy storage scheduling strategy to the execution module according to the predicted power generation in the second-stage power generation analysis. Before the second-stage power generation analysis ends and the primary lighting scheduling strategy starts, the execution module in each photovoltaic street lamp performs power scheduling on the energy storage module.

3. An intelligent control system for a photovoltaic street lamp according to claim 2, characterized in that, Before the second-stage power generation analysis, the acquisition module feeds back the actual power generation and predicted power generation of each power generation module to the intelligent scheduling module. The intelligent scheduling module further refines the time interval of the first-stage power generation analysis according to the feedback power generation error value to obtain a refined time interval. In each refined time interval, the power generation is multiplied by different weight coefficients to reduce the error of the intelligent scheduling module's power generation prediction. Through continuous feedback correction, the intelligent scheduling module can better predict the power generation of each power generation module at different time periods.

4. The intelligent control system for a photovoltaic street lamp according to claim 1, characterized in that, In the implementation of the secondary energy storage scheduling strategy by the execution module, the power transmission between the photovoltaic street lights is 95% of the transmission ratio of the energy storage module of the photovoltaic street light itself. The implementation methods of the secondary energy storage scheduling strategy and the primary energy storage scheduling strategy are the same except for the different transmission ratios.

5. An intelligent control system for a photovoltaic street lamp according to claim 1, characterized in that, In the tertiary energy storage scheduling strategy, the power transmission between the photovoltaic street lights is 24% of the transmission ratio of the energy storage module of the photovoltaic street light itself. The implementation methods of the tertiary energy storage scheduling strategy and the primary energy storage scheduling strategy are the same except for the different transmission ratios. In the primary lighting scheduling strategy, the execution module controls the lighting module in each photovoltaic street light to illuminate at 85% of the rated power. The actual load power consumption information of the lighting module of each photovoltaic street light is different. The intelligent scheduling module calculates the time for the energy storage module to continuously supply power according to the lighting module load power consumption information provided by the acquisition module. When half of the time for the energy storage module to continuously supply power has passed, the intelligent scheduling module sends the quaternary energy storage scheduling strategy and the secondary lighting scheduling strategy to the execution module, and the execution module simultaneously executes the quaternary energy storage scheduling strategy and the secondary lighting scheduling strategy.

6. The intelligent control system for a photovoltaic street lamp according to claim 1, characterized in that, In the quaternary energy storage scheduling strategy, when the difference in the remaining power of the energy storage modules between adjacent photovoltaic street lights is greater than 10% of their own power, the energy storage module with high power transmits power to the adjacent energy storage module with low power. The power transmission between the photovoltaic street lights is 8% of the transmission ratio of the energy storage module of the photovoltaic street light itself, and no power transmission occurs between the remaining energy storage modules of the photovoltaic street lights; in the secondary lighting strategy, the lighting module and the lighting module of the adjacent photovoltaic street light illuminate at 75% and 50% of the rated power respectively, and are alternately replaced every 1 hour. When the acquisition module collects the power generation power information generated by the power generation module again, the intelligent scheduling module sends a termination of the quaternary energy storage scheduling strategy and the secondary lighting strategy to the execution module, and the execution module controls the lighting module to stop running, and the intelligent scheduling module re-enters the first-stage power generation analysis; if the acquisition module does not collect the power generation power information generated by the power generation module and the remaining power of the energy storage module is lower than 20%, the execution module also controls the lighting module to stop running.

Images