Street lamp power supply intelligent control system

Abstract

The invention discloses a street lamp power supply intelligent control system, and relates to the technical field of street lamp power supply control. The system comprises a server, a daytime monitoring control module and a night monitoring control module. By monitoring environment information and street lamp information of street lamps in an area in real time, a solar power generation state and a street lamp energy consumption state can be accurately judged; accurate energy state monitoring, dynamic analysis and intelligent switching are realized; by monitoring the change trend of the battery capacity, the power consumption, the lighting duration and the night energy state value of the street lamp in the night state in real time, the consumption speed of the battery capacity and the change of electric energy supply can be recognized, and whether the battery capacity is enough to maintain continuous lighting of the street lamp or not is accurately judged; when the electric quantity of the battery is insufficient, the system can be switched to the power grid for power supply in time to ensure the continuity and stability of street lamp illumination; the risk of over-discharge of the battery is reduced to the greatest extent, so that the service life of the battery is prolonged; and intelligent smooth switching of the power supply mode is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of street lamp power supply control, and in particular to an intelligent control system for street lamp power supply. Background Art

[0002] Urban street lights are lamps installed on both sides of urban roads or in public places to provide lighting at night or in low light conditions; street light power supply refers to providing electricity to support the normal operation of street lights, providing necessary energy for street light sources, control systems, sensors and other equipment, so that street lights can illuminate at night or in low light conditions. Street light power supply usually relies on the city power grid, but modern systems also use renewable energy (such as solar energy) for power supply; The current power supply for street lamps does not fully utilize renewable energy (solar energy) and still relies on traditional power grids. When renewable energy is insufficient, the switching between renewable energy and the power grid cannot be balanced, resulting in low energy utilization for street lamp power supply. When renewable energy is insufficient, street lamps cannot even maintain stable lighting. Summary of the invention

[0003] Based on this, it is necessary to provide an intelligent control system for street lamp power supply in response to the problems mentioned in the above background technology.

[0004] The purpose of the present invention can be achieved by the following technical solutions: A street lamp power supply intelligent control system, including a server, a daytime monitoring control module and a nighttime monitoring control module; The city is divided into several power supply areas, each of which has several street lamps. The server communicates with the sensors on the street lamps in each area to obtain the environmental information and street lamp information of each area in the daytime and the street lamp information at night in real time, and stores them. The daytime monitoring control module comprehensively analyzes the environment and energy status of the street lamp based on the environmental information and street lamp information in the daytime state to obtain the daytime energy status value of the street lamp in the daytime state at each collection time, and judges whether to use the battery power to supply power accordingly; if the battery power is used to supply power, a nighttime monitoring control signal is generated to the nighttime monitoring control module; otherwise, the power supply mode of the street lamp is switched to power supply by the grid; The night monitoring control module analyzes the energy status of the street lamps at night based on the received night monitoring control signal to obtain the night energy status value at each collection time, and judges the night power supply mode accordingly, specifically: The battery power and power consumption of the street lamp at night are retrieved and recorded as D2j and H2j respectively; the battery power D2j and the power consumption H2j of the street lamp are normalized and their values ​​are taken, and the values ​​are calculated and analyzed by formula to obtain the night energy state value N2j at night; the specific calculation formula is: Where α1 and α2 are respectively the set proportional constants, j=1,2,3…J, J is a positive integer, J is the total number of acquisition moments, and j is any one of the acquisition moments; A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the night energy state value in the night state as the vertical coordinate. The night energy state value is input into the coordinate axis according to its corresponding collection time, and the position of the night energy state value in the coordinate axis is recorded as the night state point. A smooth curve is used to connect each night state point in sequence to obtain a relationship diagram of the night energy state value changing with time; a tangent line of the curve is drawn at each night state point, and the slope of the tangent line is calculated using the least squares method, thereby obtaining the night slope at each night state point; The absolute value of the nighttime slope is compared and analyzed to measure the overall change trend of the nighttime energy status value of the street lamp under nighttime conditions, and the nighttime energy change index is obtained accordingly, recorded as KU; The estimated consumption of street lamps at night is analyzed and recorded as M3. Get the current battery power of the system and record it as D; when both meet When the battery power is continuously used to power the street lamp at night; otherwise, the power supply mode of the street lamp is switched to the grid power supply; where a is the duration conversion coefficient, and A is the set fixed threshold.

[0005] In some embodiments, the specific process of measuring the overall change trend of the nighttime energy status value of the street lamp in the nighttime state is as follows: The absolute value of the nighttime slope is compared with the set variation interval to divide the nighttime slope into the first echelon decline, the second echelon decline and the third echelon decline. The cumulative number of the first echelon decline, the second echelon decline and the third echelon decline are counted and recorded as U1, U2 and U3 respectively. The cumulative number of the first echelon decline, the cumulative number of the second echelon decline, the cumulative number of the third echelon decline and the absolute value of the nighttime slope |Kj| are normalized and their values ​​are taken. The values ​​are analyzed and calculated in a formula to obtain the nighttime energy variation index KU. The specific calculation formula is: Among them, β1, β2, and β3 are the set proportional constants respectively.

[0006] In some embodiments, the specific process of predicting and analyzing the lighting duration and power consumption of street lamps at night is as follows: Get the lighting duration provided by the street lamps in the system at the current moment, and record it as M1; get the total lighting duration set by the street lamps in the current system, and record it as M2; The power consumption of street lamps at night is retrieved and the total consumption is calculated and recorded as X; the total consumption value X, lighting duration M1, and total lighting duration M2 are calculated by formula to obtain the estimated consumption M3; the specific calculation formula is: .

[0007] In some embodiments, the specific process of comprehensively analyzing the environment in which the street lamp is located and the energy state of the street lamp based on the environmental information and street lamp information in the daytime state is as follows: Retrieve the environmental information of each collection time under each daytime state, where the environmental information includes light intensity and temperature, and record them as Qj and Tj respectively; obtain the model of the solar panel installed on each street lamp, and set each model of solar panel to correspond to an optimal working temperature; normalize the light intensity, temperature and optimal working temperature and take their values, and perform formula calculation and analysis on the values ​​to obtain the solar energy value TQj corresponding to each collection time; the specific calculation formula is: Among them, γ1 and γ2 are the set proportional constants respectively; Retrieve the street light information at each collection time in each daytime state, which specifically includes solar power generation, battery power, and street light power consumption, and record them as Fj, D1j, and H1j respectively; The solar energy value TQj, solar power generation Fj, battery power Di, and street lamp power consumption Hj (although street lamps are usually not illuminated during the day, modern street lamps are equipped with various sensors, which still work during the day and thus generate a certain amount of power consumption) are normalized and their values ​​are taken. The daytime energy state value N1j is obtained by formulating and analyzing the values. The specific calculation formula is: Among them, δ1, δ2, δ3, and δ4 are respectively set proportional constants, and δ3>δ2>δ1>1.

[0008] In some embodiments, the specific process of determining the power supply mode according to the daytime energy status value is as follows: A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the daytime energy status value as the vertical coordinate, the daytime energy status value is input into the coordinate axis according to its corresponding collection time, and the position of the daytime energy status value in the coordinate axis is recorded as the daytime status point, and a smooth curve is used to connect each daytime status point in sequence to obtain a curve graph of the daytime energy status value changing with time; thus, a curve graph of the daytime energy status value changing with time under the daytime state can be obtained; Draw a tangent to the curve at each daytime state point, and use the least squares method to calculate the slope of the tangent, thereby obtaining the daytime slope at each state point; sum up the daytime slopes greater than zero to obtain the daytime energy increase value recorded as S1, and sum up the daytime slopes less than zero and take the absolute value to calculate the daytime energy reduction value recorded as S2; normalize the daytime energy state value N1j, the daytime energy increase value S1 and the daytime energy reduction value S2 at each collection time in the daytime state and take their values, and perform formulaic calculation and analysis on the values ​​to obtain the daytime energy index R1 in the daytime state; the specific calculation formula is: Among them, λ1 and λ2 are the set proportional constants respectively; The battery power at the last collection moment in the daytime state is retrieved; when the daytime energy index is greater than the set energy threshold and the battery power is greater than the set power threshold, the battery power is used to power the street lamp and generate a night monitoring and control signal to the night monitoring control module; otherwise, the power supply mode of the street lamp is switched to grid power supply.

[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. By real-time monitoring of the environmental information (such as light intensity and temperature) and street light information (such as power generation, battery power, and power consumption) of street lights in the area, it can accurately determine the solar power generation status and street light energy consumption status. According to the daytime energy index and battery power, it can automatically determine whether to use battery power for power supply, otherwise switch to grid power supply; it realizes accurate energy status monitoring, dynamic analysis and intelligent switching, improves the stability of the street light power supply system, energy utilization efficiency and the proportion of renewable energy use, while reducing energy waste and costs, with significant energy-saving and stability improvement effects; 2. By real-time monitoring of the battery power, power consumption, lighting time and changing trends of nighttime energy status values ​​of street lamps at night, it is possible to identify the battery consumption rate and changes in power supply, and accurately determine whether the battery power is sufficient to maintain continuous lighting of the street lamps; when the battery power is low, the system will switch to grid power supply in time to ensure the continuity and stability of street lighting; minimize the risk of battery over-discharge, thereby extending the battery life; at the same time, it can optimize the power supply mode of street lighting according to the current energy changes and battery power conditions, reduce the frequency of grid power supply, improve the utilization efficiency of solar energy resources, and realize intelligent and smooth switching of power supply modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a principle block diagram of the present invention. DETAILED DESCRIPTION

[0012] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0013] like Figure 1 As shown, a street lamp power supply intelligent control system includes a server, a daytime monitoring control module and a nighttime monitoring control module; The city is divided into several power supply areas, each of which has several street lamps. The server communicates with the sensors on the street lamps in each area to obtain the environmental information and street lamp information of each area in the daytime and the street lamp information at night in real time, and stores them. The daytime monitoring and control module performs real-time monitoring and analysis based on environmental information and street light information to determine the solar power generation status and energy consumption status of street lights in the area, and obtains the power stability index based on this, specifically: Select any one of the areas, retrieve the environmental information of each collection time under each daytime state, where the environmental information includes light intensity and temperature, and record them as Qj and Tj respectively, where j=1,2,3...J, J is a positive integer, J is the total number of collection times, and j is any one of the collection times; it should be noted that light intensity is the main factor that directly affects the power generation efficiency of solar panels. The greater the light intensity, the higher the power generation; while temperature indirectly affects the power generation efficiency of solar panels. Higher temperatures will lead to lower efficiency of solar panels; Retrieve the street lamp information at each collection time in each daytime state, which specifically includes solar power generation, battery power, and street lamp energy consumption, and record them as Fj, D1j, and H1j respectively; it should be noted that even in the same area, street lamps at different locations will have different solar energy reception, temperature, and solar power generation, because some street lamps will be partially blocked by buildings, billboards, or other objects (usually the temperature in direct sunlight will be slightly higher, and the amount of solar energy converted into electricity will be more); Get the model of the solar panel installed on each street lamp, set an optimal working temperature corresponding to each model of solar panel, and record it as ZT; it should be noted that the optimal working temperature of different models of solar panels is different, usually around 25°C. When the temperature exceeds this range, the efficiency will gradually decrease. For every 1°C increase in temperature, the output power of the solar panel may decrease by 0.3% to 0.5%; normalize the light intensity, temperature and optimal working temperature and take their values, and perform formula calculation and analysis on the values ​​to obtain the solar energy value TQj corresponding to each collection time; the specific calculation formula is: Among them, γ1 and γ2 are respectively the set proportional constants. From the formula, we can know that when the temperature is closer to the optimal working temperature of the solar panel, the greater the solar energy value is; when the light intensity is greater, the greater the solar energy value is; when the solar energy value is greater, it means that the solar energy in the environment where the street lamp is located is more sufficient; The solar energy value TQj, solar power generation Fj, battery power Di, and street lamp power consumption Hj (although street lamps are usually not illuminated during the day, modern street lamps are equipped with various sensors, which still work during the day and thus generate a certain amount of power consumption) are normalized and their values ​​are taken. The daytime energy state value N1j is obtained by formulating and analyzing the values. The specific calculation formula is: Among them, δ1, δ2, δ3, and δ4 are respectively set proportional constants, and δ3>δ2>δ1>1; from the formula, when the street lamp is in a daytime state, the environment is sunny and the power generation is more, the battery stores more power, and the power consumption is less, which means that the street lamp has a better storage state for solar energy at this time; A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the daytime energy status value as the vertical coordinate, the daytime energy status value is input into the coordinate axis according to its corresponding collection time, and the position of the daytime energy status value in the coordinate axis is recorded as the daytime status point, and a smooth curve is used to connect each daytime status point in sequence to obtain a curve graph of the daytime energy status value changing with time; thus, a curve graph of the daytime energy status value changing with time under the daytime state can be obtained; For the curve of the daytime energy state value changing with time in the daytime state, a tangent line is drawn to the curve at each daytime state point, and the slope of the tangent line is calculated using the least squares method, thereby obtaining the daytime slope at each state point; it should be noted that the daytime slope represents the changing trend of the daytime energy state value at the state point. When the daytime slope is greater than zero, it indicates that the daytime energy state value shows an increasing trend at the state point, and when the daytime slope is less than zero, it indicates that the daytime energy state value shows a decreasing trend at the state point; the daytime slopes greater than zero are summed up to obtain the daytime energy increase value recorded as S1, and the daytime slopes less than zero are summed up and the absolute value is taken to obtain the daytime energy decrease value recorded as S2; the daytime energy state value N1j, the daytime energy increase value S1 and the daytime energy decrease value S2 at each collection time in the daytime state are normalized and their values ​​are taken, and the values ​​are analyzed by formula calculation to obtain the daytime energy index R1 in the daytime state; the specific calculation formula is: Among them, λ1 and λ2 are respectively the set proportional constants; from the formula, it can be seen that when the increasing trend of the daytime energy status value is greater and the decreasing trend is smaller, it means that the overall change trend of the daytime energy status value is increasing, and the daytime energy index is greater; when the daytime energy status value at each collection moment is greater, it means that the environment where the solar panel of the street lamp is located can fully convert and store solar energy; The battery power at the last acquisition time in the daytime state (usually the time when the solar panel of the street lamp can no longer convert solar energy from the environment into electrical energy) is retrieved; when the daytime energy index is greater than the set energy threshold and the battery power is greater than the set power threshold, the battery power is used to power the street lamp and a nighttime monitoring and control signal is generated to the nighttime monitoring control module; otherwise, the power supply mode of the street lamp is switched to grid power supply; By real-time monitoring of the environmental information (such as light intensity and temperature) and street light information (such as power generation, battery power, and power consumption) of street lights in the area, it is possible to accurately determine the solar power generation status and the energy consumption status of street lights. According to the daytime energy index and battery power, it is possible to automatically determine whether to use battery power for power supply, otherwise switch to grid power supply, achieving accurate energy status monitoring, dynamic analysis, and intelligent switching, improving the stability of the street light power supply system, energy utilization efficiency, and the proportion of renewable energy use, while reducing energy waste and costs, with significant energy-saving and stability improvement effects.

[0014] The night monitoring control module monitors the night power supply of the street lights powered by batteries in each area, and determines whether it is necessary to switch the energy use mode to achieve intelligent and smooth switching to ensure stable lighting of the street lights; specifically: Retrieve street light information at night, including battery power and street light power consumption, and record them as D2j and H2j respectively; normalize the battery power D2j and street light power consumption H2j and take their values, perform formula calculation and analysis on the values ​​to obtain the night energy state value N2j at night; the specific calculation formula is: Among them, α1 and α2 are respectively set proportional constants. It can be known from the formula that when the street lamp is in the night state, the more battery power the street lamp has, the less power it consumes, which means that the road is at night and the battery power can provide lighting; a two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the night energy state value in the night state as the vertical coordinate, and the night energy state value is input into the coordinate axis according to its corresponding collection time, and the position of the night energy state value in the coordinate axis is recorded as the night state point, and a smooth curve is used to connect each night state point in turn to obtain a relationship diagram of the night energy state value changing with time; a tangent line of the curve is drawn at each night state point, and the slope of the tangent line is calculated using the least squares method, thereby obtaining the night slope at each night state point; it should be noted that, because the street lamp cannot convert solar energy into electrical energy in the night state, as the lighting time continues, the battery power decreases with the increase of lighting time, the night energy state value decreases with the increase of lighting time, and the night slope will show a decreasing trend; the absolute value of the night slope is recorded as |Kj|; The absolute value of the nighttime slope |Kj| is compared and analyzed with the set variation interval. When the absolute value of the nighttime slope is greater than the upper limit of the set variation interval, it indicates that the nighttime energy status value shows a substantial decline, and a first-tier decline is accumulated; when the absolute value of the nighttime slope is within the set variation interval, a second-tier decline is accumulated; when the absolute value of the nighttime slope is less than the lower limit of the set variation interval, a third-tier decline is accumulated; the cumulative number of first-tier declines, second-tier declines, and third-tier declines are counted respectively, and recorded as U1, U2, and U3 respectively; the cumulative number of first-tier declines, the cumulative number of second-tier declines, the cumulative number of third-tier declines, and the absolute value of the nighttime slope |Kj| are normalized and their values ​​are taken, and the values ​​are analyzed and calculated in a formula to obtain the nighttime energy change index KU; the specific calculation formula is: Among them, β1, β2, and β3 are respectively the set proportional constants. It can be seen from the formula that the larger the absolute value of the night slope |Kj| is, the greater the trend of the night energy state value decreasing is, and the greater the possibility that the battery power cannot maintain the continuous lighting of the street lamp is. Get the lighting duration of the street lamps provided by the system at the current moment, and record it as M1; it should be noted that the total lighting duration of urban street lamps is usually set to 10-12 hours, and the specific duration is adjusted by personnel in this field according to the actual seasonal needs; when the lighting duration is shorter, the battery power should be more sufficient, otherwise as the lighting continues, the battery power will be difficult to last to the total lighting duration; get the total lighting duration set by the street lamps in the current system, and record it as M2; The power consumption of street lamps at night is retrieved and summed to obtain the total consumption value X; the total consumption value X, lighting duration M1, and total lighting duration M2 are calculated by formula to obtain the estimated consumption M3; the specific calculation formula is: Get the current battery power of the system and record it as D; when both meet When the time is 100, the battery power is continuously used to power the street lamp at night; otherwise, the power supply mode of the street lamp is switched to the grid power supply; where a is the duration conversion coefficient, and A is the set fixed threshold; By real-time monitoring of the battery power, power consumption, lighting time and changing trends of nighttime energy status values ​​of street lamps at night, it is possible to identify the battery consumption rate and changes in power supply, and accurately determine whether the battery power is sufficient to maintain continuous lighting of the street lamps; when the battery power is low, the system will switch to grid power supply in a timely manner to ensure the continuity and stability of street lighting; minimize the risk of battery over-discharge, thereby extending the battery life; at the same time, it can optimize the power supply mode of street lighting according to the current energy changes and battery power conditions, reduce the frequency of grid power supply, improve the utilization efficiency of solar energy resources, and realize intelligent and smooth switching of power supply modes.

[0015] The above formulas are all obtained by collecting a large amount of data and performing software simulation, and a formula close to the actual value is selected. The coefficients in the formula are set by technicians in this field according to actual conditions.

[0016] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0017] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A street lamp power supply intelligent control system, comprising a daytime monitoring control module and a nighttime monitoring control module; characterized in that: The daytime monitoring control module comprehensively analyzes the environment and energy status of the street lamp based on the environmental information and street lamp information in the daytime state to obtain the daytime energy status value of the street lamp in the daytime state at each collection time, and judges whether to use the battery power to supply power accordingly; if the battery power is used to supply power, a nighttime monitoring control signal is generated to the nighttime monitoring control module; otherwise, the power supply mode of the street lamp is switched to power supply by the grid; The night monitoring control module analyzes the energy status of the street lamps at night based on the received night monitoring control signal to obtain the night energy status value at each collection time, and judges the night power supply mode accordingly, specifically: The battery power and power consumption of the street lamps in the night state are retrieved, normalized and taken, and the values ​​are calculated and analyzed by formula to obtain the night energy state value in the night state; a two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the night energy state value in the night state as the vertical coordinate, the night energy state value is input into the coordinate axis according to its corresponding collection time, and the position of the night energy state value in the coordinate axis is recorded as the night state point, and each night state point is connected in sequence to obtain a relationship diagram of the night energy state value changing with time; a tangent line is drawn at each night state point, and the slope of the tangent line is calculated by the least square method, thereby obtaining the night slope at each night state point; Compare and analyze the absolute value of the nighttime slope to measure the overall change trend of the nighttime energy status value of the street lamps at night, and obtain the nighttime energy change index based on it, recorded as KU; conduct an estimated analysis of the lighting time and power consumption of street lamps at night to obtain the estimated consumption, recorded as M3; Get the current battery power of the system and record it as D; when both meet When the battery power is continuously used to power the street lamp at night; otherwise, the power supply mode of the street lamp is switched to the grid power supply; where a is the duration conversion coefficient, and A is the set fixed threshold.

2. The intelligent control system for power supply of street lamps according to claim 1, characterized in that: The specific process of measuring the overall change trend of the nighttime energy status value of street lamps at night is as follows: The absolute value of the nighttime slope is compared with the set variation interval to divide the nighttime slope into the first echelon decline, the second echelon decline and the third echelon decline. The cumulative number of the first echelon decline, the second echelon decline and the third echelon decline are counted respectively, and the cumulative number of the first echelon decline, the second echelon decline, the third echelon decline and the absolute value of the nighttime slope are normalized and their values ​​are taken. The values ​​are formulated and analyzed to obtain the nighttime energy change index.

3. The intelligent control system for street lamp power supply according to claim 2, characterized in that: The specific process of predicting and analyzing the lighting duration and power consumption of street lamps at night is as follows: Get the lighting duration provided by the street lamps in the system at the current moment, and get the total lighting duration set by the street lamps in the current system; The power consumption of street lamps at night is retrieved and summed up to obtain the total consumption value; the total consumption value, lighting time, and total lighting time are calculated by formula to obtain the estimated consumption.

4. The intelligent control system for power supply of street lamps according to claim 1, characterized in that: The specific process of comprehensively analyzing the environment and energy status of street lamps based on the environmental information and street lamp information in the daytime state is as follows: Retrieve environmental information at each collection time under each daytime state, where the environmental information includes light intensity and temperature; obtain the model of the solar panel installed on each street lamp, and set an optimal working temperature corresponding to each model of solar panel; normalize the light intensity, temperature and optimal working temperature and take their values, and perform formula calculation and analysis on the values ​​to obtain the solar energy value corresponding to each collection time; The street lamp information at each collection time under each daytime state is retrieved, which specifically includes solar power generation, battery power, and street lamp energy consumption; the solar energy value, solar power generation, battery power, and street lamp power consumption are normalized and their numerical values ​​are taken, and the numerical values ​​are calculated and analyzed by formulas to obtain the daytime energy status value.

5. The intelligent control system for power supply of street lamps according to claim 4, characterized in that: The specific process of judging the power supply mode according to the daytime energy status value is as follows: A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the daytime energy status value as the vertical coordinate, the daytime energy status value is input into the coordinate axis according to its corresponding collection time, and the position of the daytime energy status value in the coordinate axis is recorded as the daytime status point, and a smooth curve is used to connect each daytime status point in sequence to obtain a curve graph of the daytime energy status value changing with time; thus, a curve graph of the daytime energy status value changing with time under the daytime state can be obtained; Draw a tangent line of the curve at each daytime state point, and use the least square method to calculate the slope of the tangent line, thereby obtaining the daytime slope at each state point; sum up the daytime slopes greater than zero to obtain the daytime energy increase value, and sum up the daytime slopes less than zero and take the absolute value to calculate the daytime energy reduction value; The daytime energy state value, daytime energy increase value and daytime energy decrease value at each collection time under the daytime state are normalized and their values ​​are taken, and the values ​​are calculated and analyzed by formula to obtain the daytime energy index under the daytime state; The battery power at the last collection moment in the daytime state is retrieved; when the daytime energy index is greater than the set energy threshold and the battery power is greater than the set power threshold, the battery power is used to power the street lamp and generate a night monitoring and control signal to the night monitoring control module; otherwise, the power supply mode of the street lamp is switched to grid power supply.

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