Circuit control system for street lamp of automobile charging pile

Abstract

The invention discloses a circuit control system for an automobile charging pile street lamp, and relates to the technical field of circuit control. The environment information, the energy storage information and the vehicle information are subjected to lighting and charging characteristic analysis to obtain control characteristic parameters, the lighting state and the charging load state of the automobile charging pile street lamp can be accurately evaluated, and data support is provided for dynamic adjustment of lighting and charging strategies of the automobile charging pile street lamp. The brightness in the lighting area and the charging power of the automobile charging pile street lamp are dynamically adjusted by controlling the characteristic parameters, so that the light brightness in the lighting area can meet actual requirements in different environments, excessive lighting is avoided, and energy is saved; meanwhile, the charging power is adjusted according to the SOC interval and the load state index of the battery, so that the charging process is more efficient, and energy utilization is optimized; and optimization of energy utilization and intelligent control of the street lamp of the automobile charging pile are realized.

Description

Technical Field

[0001] The present invention relates to the field of circuit control technology, and in particular to a circuit control system for a car charging pile street lamp. Background Art

[0002] Car charging pile street lights are facilities that combine street lights and electric vehicle charging functions. They are usually used in public areas of cities. They can provide lighting and meet the charging needs of electric vehicles. In the case where traditional street lights and charging piles are set up separately, charging pile street lights can reduce the public space occupied. Therefore, car charging pile street lights are very necessary. At present, the street lights of car charging piles are usually illuminated at a fixed brightness during a set time period. This control method is simple, but has poor flexibility and cannot be adjusted according to actual conditions, thus causing energy waste. Summary of the invention

[0003] The main purpose of the present invention is to provide a circuit control system for a car charging pile street lamp to overcome the problems mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, a circuit control system for a car charging pile street light is provided, comprising: a database, a feature extraction module and a circuit control module; The database communicates with each car charging pile street lamp and the sensors mounted on the car charging pile street lamp to obtain environmental information, energy storage information, and vehicle information; the environmental information includes the ambient brightness, pedestrian flow, and vehicle flow; the energy storage information includes the charge load of each car charging pile street lamp; the vehicle information includes the vehicle's SOC (battery charge state, that is, the percentage of the battery's current stored electricity relative to its maximum capacity); The feature extraction module performs feature analysis on lighting and charging based on environmental information, energy storage information and vehicle information to extract control feature parameters, and sends them to the circuit control module; wherein the control feature parameters include a lighting adjustment index and a load state index; The circuit control module dynamically adjusts the lighting and charging strategies of the vehicle charging pile street lamps based on the control characteristic parameters; specifically: When the lighting adjustment index is greater than the set lighting adjustment threshold, the lighting of the car charging pile street light is adjusted. The specific steps of lighting adjustment are as follows: The vehicle flow and pedestrian flow corresponding to each collection time in the lighting area of ​​the car charging pile street lamp are retrieved and recorded as and ;Will and Substitute the set formula Calculate and obtain the brightness adjustment value CR, where f1 and f2 are respectively the set proportional coefficients, and β is the set brightness conversion coefficient; adjust the brightness of the car charging pile street light according to the brightness adjustment value; It is assumed that there are several SOC intervals, each of which corresponds to a charge weakening coefficient; Retrieve the SOC of the charging car corresponding to the car charging pile street lamp at the current moment, and compare it with all the set SOC intervals to match the corresponding weakening coefficient recorded as k; substitute the weakening coefficient k and the load state index DZ into the set formula The charging guide power SD is obtained by calculation and analysis, and γ is the set charging power conversion coefficient; the charging power of the vehicle is controlled according to the charging guide power.

[0005] Furthermore, the specific process of lighting feature analysis is as follows: Retrieve the environmental information corresponding to each collection time, where the environmental information includes environmental brightness, vehicle flow, and pedestrian flow, and record them as Lj, Cj, and Rj, respectively, where j=1,2,3...J, J is a positive integer, J represents the total number of collection times, and j represents the sequence number of any collection time; substitute Lj, ​​Cj, and Rj into the set formula The lighting related value LRj is calculated, where a1, a2, and a3 are respectively the set proportional coefficients; A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and lighting-related values ​​as the vertical coordinate. The lighting-related values ​​are plotted on the coordinate axis according to their corresponding collection time to obtain each lighting point. A smooth curve is used to connect each lighting point in sequence to obtain a curve relationship diagram of the lighting-related values ​​of the automobile charging pile street lamp changing with time. The lighting adjustment index is obtained by performing a graphical trend analysis on the relationship diagram of the lighting-related value changing over time.

[0006] Furthermore, the specific process of performing graphical trend analysis on the curve relationship diagram of the lighting-related value changing over time is as follows: Draw a tangent line at the lighting point, use data fitting to get the tangent expression, and take the derivative of the tangent expression to get the lighting derivative, which is recorded as Mj; sum the lighting derivatives greater than zero to get the positive lighting correlation, which is recorded as F1, and sum the lighting derivatives less than zero and take the absolute value to get the negative lighting correlation, which is recorded as F2; Substitute the lighting related value LRj, lighting derivative Mj, lighting positive correlation F1 and lighting negative correlation F2 into the set formula The lighting adjustment index FM is calculated, where b1, b2, and b3 are the set proportional coefficients. is the mean value of the illumination derivative at each illumination point.

[0007] Furthermore, the specific process of charging characteristic analysis is as follows: Retrieve the energy storage information at each acquisition moment, where the energy storage information includes the charge load of each car charging pile street lamp, and record it as Pij, where i=1, 2, 3...I, I represents the total number of car charging pile street lamps in the same load area, and i represents the serial number of any car charging pile street lamp; compare and analyze the charge load of each car charging pile street lamp with the set load interval to divide the car charging pile street lamps corresponding to the charge load into high load points, medium load points and low load points, and count the number of high load points, medium load points and low load points in the same power grid load area, and record them as U1j, U2j and U3j respectively; substitute U1j, U2j, U3j and Pij into the set formula The grid load value Ugj at each acquisition moment is calculated, where g1, g2, and g3 are respectively the set proportional coefficients, and g1>g2>g3>0; A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the power grid load value as the vertical coordinate. The power grid load value is plotted on the coordinate axis according to its corresponding collection time to obtain each load point. A smooth curve is used to connect each load point in sequence to obtain a curve graph of the power grid load value changing with time. The load state index is obtained by performing a graphical trend analysis on the graph of the grid load value changing over time.

[0008] Furthermore, the specific process of performing graphical trend analysis on the graph of the grid load value changing over time is as follows: Draw a tangent line at each load point, use data fitting to get the tangent line expression, and take the derivative of the tangent line expression to get the load derivative corresponding to each load point, which is recorded as Zj; sum the load derivatives greater than zero to get the load increase degree, which is recorded as D1, and sum the load derivatives less than zero and take the absolute value to get the load reduction degree, which is recorded as D2; Substitute the grid load value Ygj, load derivative Zj, load increase degree D1 and load reduction degree D2 at each acquisition time into the set formula The load state index DZ is calculated, where d1, d2, and d3 are the set proportional coefficients. is the mean value of the load derivative at each load point.

[0009] Beneficial effects of the present invention: The present invention obtains control characteristic parameters by performing lighting and charging characteristic analysis on environmental information, energy storage information and vehicle information respectively, wherein the control characteristic parameters include a lighting adjustment index and a load state index, wherein the lighting adjustment index comprehensively considers the ambient brightness, vehicle flow and pedestrian flow, analyzes the influence of these factors on lighting demand, and can accurately evaluate the demand change of the lighting state, thereby guiding the dynamic adjustment of the lighting intensity; the load state index evaluates the stability and intensity of the charge load of the charging pile street lamp, reflects the change trend of the load, and helps to optimize the load management; therefore, the control characteristic parameters can accurately evaluate the lighting state and charging load state of the automobile charging pile street lamp, and provide data support for realizing the dynamic adjustment of the lighting and charging strategies of the automobile charging pile street lamp; The present invention dynamically adjusts the brightness in the lighting area and the charging power of the car charging pile street lamp by controlling characteristic parameters, so that the light brightness in the lighting area can meet the actual needs in different environments, avoiding excessive lighting, and thus saving energy; at the same time, the charging power is adjusted according to the SOC range and load state index of the battery, so that the charging process is more efficient, overcharging is avoided, and the burden on the power grid is reduced, thereby optimizing energy utilization; the optimization of energy utilization and intelligent control of the car charging pile street lamp are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of system module connection of the present invention. DETAILED DESCRIPTION

[0011] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0012] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0013] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0014] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0015] See also Figure 1 As shown, a circuit control system for a car charging pile street light includes: a database, a feature extraction module, and a circuit control module; Each car charging pile street lamp is set to correspond to a lighting area. It should be noted that the lighting area is specifically set by technicians in this field according to the actual installation situation; the environmental information refers to the environmental information within the lighting area of ​​the car charging pile street lamp; The database communicates with each car charging pile street lamp and the sensors mounted on the car charging pile street lamp to obtain environmental information, energy storage information, and vehicle information; the environmental information includes the ambient brightness, pedestrian flow, and vehicle flow; the energy storage information includes the charge load of each car charging pile street lamp; the vehicle information includes the vehicle's SOC (battery charge state, that is, the percentage of the battery's current stored electricity relative to its maximum capacity); The feature extraction module analyzes the environment information, energy storage information and vehicle information to extract the control feature parameters; specifically: Lighting feature analysis: Retrieve the environmental information corresponding to each collection time, where the environmental information includes environmental brightness, vehicle flow and pedestrian flow, and record them as Lj, Cj and Rj respectively, where j=1,2,3...J, J is a positive integer, J represents the total number of collection times, and j represents the sequence number of any collection time; use the set formula The lighting related value LRj is calculated, where a1, a2, and a3 are respectively the set proportional coefficients; it can be seen from the formula that the greater the vehicle flow and the greater the pedestrian flow, the more the brightness of the car charging pile street lamp needs to be increased to provide a better lighting environment; if the ambient brightness in the lighting area of ​​the car charging pile street lamp is lower, and the vehicle flow and pedestrian flow are greater; or the ambient brightness in the lighting area is higher, and the vehicle flow and pedestrian flow are smaller; both indicate that the lighting brightness of the photo area at this time does not match the lighting demand; the smaller the lighting related value; correspondingly, when the ambient brightness in the lighting area of ​​the car charging pile street lamp corresponds to the pedestrian flow and vehicle flow, the greater the lighting related value; A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and lighting-related values ​​as the vertical coordinate. The lighting-related values ​​are plotted on the coordinate axis according to their corresponding collection times to obtain each lighting point. A smooth curve is used to connect each lighting point in sequence to obtain a curve relationship diagram of the lighting-related values ​​of the car charging pile street lamp changing with time. A tangent line is drawn at the lighting point, and the tangent expression is obtained by data fitting. The tangent expression is derived and calculated to obtain the lighting derivative, recorded as Mj. When the lighting derivative is greater than zero, it means that at the lighting point, the lighting-related value shows an increasing trend, and when the lighting derivative is less than zero, it means that at the lighting point, the lighting-related value shows a decreasing trend. The lighting derivatives greater than zero are summed up to obtain the positive lighting correlation, recorded as F1, and the lighting derivatives less than zero are summed up and the absolute value is taken to obtain the negative lighting correlation, recorded as F2. The set formula is used to calculate the lighting derivative. The lighting adjustment index FM is calculated, where b1, b2, and b3 are the set proportional coefficients. is the average value of the lighting derivative of each lighting point; from the formula, it can be seen that when the overall decreasing trend of the lighting-related value is greater, it means that the ambient brightness in the lighting area does not match the traffic and pedestrian flow in the area, and the lighting adjustment index is greater; when the lighting derivative fluctuates more, it means that there are more mismatches between the traffic and pedestrian flow in the lighting area and the ambient brightness, and the lighting adjustment index is greater; Charging characteristics analysis: Retrieve the energy storage information at each collection moment, where the energy storage information includes the charge load of each car charging pile street lamp, and record it as Pij, where i=1, 2, 3...I, I represents the total number of car charging pile street lamps in the same load area, and i represents the sequence number of any one of the car charging pile street lamps; it should be noted that the charge load refers to the lighting load and charging load of each car charging pile street lamp; Compare and analyze the charge load of each car charging pile street lamp with the set load range. When the charge load is greater than the set upper limit of the load range, it means that the charge load of the car charging pile street lamp at this moment is relatively large, and a high load point is accumulated; when the charge load is within the set load range, a medium load point is accumulated; when the charge load is less than the set lower limit of the load range, a low load point is accumulated; count the number of high load points, medium load points and low load points in the same power grid load area, and record them as U1j, U2j and U3j respectively; use the set formula The grid load value Ugj at each acquisition moment is calculated, where g1, g2, and g3 are respectively the set proportional coefficients, and g1>g2>g3>0; A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the power grid load value as the vertical coordinate. The power grid load value is plotted on the coordinate axis according to its corresponding collection time to obtain each load point. A smooth curve is used to connect each load point in sequence to obtain a curve chart of the power grid load value changing with time; a tangent line is drawn at each load point, and a tangent expression is obtained by data fitting. The tangent expression is derived to obtain the load derivative corresponding to each load point, which is recorded as Zj; the load derivatives greater than zero are summed to obtain the load increase degree, which is recorded as D1, and the load derivatives less than zero are summed and the absolute value is taken to calculate the load reduction degree, which is recorded as D2; using the set formula The load state index DZ is calculated, where d1, d2, and d3 are the set proportional coefficients. is the mean value of the load derivative of each load point; from the formula, it can be seen that when the grid load value is larger and the overall increase trend of the grid load is greater, the load state index is larger; when the grid load value is more unstable, the load state index is larger; Recording the lighting adjustment index and the load state index as control characteristic parameters and sending them to the circuit control module; By analyzing the lighting and charging characteristics of environmental information, energy storage information and vehicle information respectively, control characteristic parameters are obtained, wherein the control characteristic parameters include a lighting adjustment index and a load state index. The lighting adjustment index comprehensively considers the ambient brightness, vehicle flow and pedestrian flow, analyzes the impact of these factors on lighting demand, and can accurately evaluate changes in lighting state demand, thereby guiding the dynamic adjustment of lighting intensity; the load state index evaluates the stability and intensity of the charge load of the charging pile street lamp, reflects the changing trend of the load, and helps to optimize load management; therefore, the control characteristic parameters can accurately evaluate the lighting state and charging load state of the car charging pile street lamp, and provide data support for the dynamic adjustment of the lighting and charging strategies of the car charging pile street lamp.

[0016] The circuit control module performs lighting and charging circuit control based on the received control characteristic parameters to optimize energy use and improve energy utilization; specifically: Lighting Control: The lighting control index is compared and analyzed with the set lighting control threshold. When the lighting adjustment index is greater than the set lighting adjustment threshold, it means that the ambient brightness in the lighting area does not match the flow (vehicle flow and pedestrian flow) in the area. In this case, the lighting control of the car charging pile street lamp is carried out. The specific steps of lighting control are as follows: The vehicle flow and pedestrian flow corresponding to each collection time in the lighting area of ​​the car charging pile street lamp are retrieved, and the average vehicle flow and average pedestrian flow are calculated respectively, and recorded as and ; Using the set formula The brightness adjustment value CR is calculated, where f1 and f2 are respectively the set proportional coefficients, and β is the set brightness conversion coefficient. It can be seen from the formula that when the traffic volume and pedestrian volume in the lighting area of ​​the car charging pile street lamp are larger, it means that the lighting demand in the lighting area is relatively high, and the corresponding brightness adjustment value is larger. The brightness of the car charging pile street lamp is adjusted according to the brightness adjustment value, and intelligent lighting control can be performed according to real-time data to adapt to different environmental requirements and energy-saving requirements. Charging control: It is assumed that there are several SOC intervals, each of which corresponds to a charge weakening coefficient. It should be noted that in a high SOC state, the battery is close to being fully charged, and continuing to charge at high power may lead to overcharging, affecting the chemical stability of the battery and reducing the battery life. In addition, high-power charging will generate more heat, and reducing the charging power at high SOC can reduce the temperature rise, thereby avoiding damage to the battery caused by overheating. Therefore, the larger the upper and lower limits of the SOC interval, the smaller the corresponding weakening coefficient. For example, there are SOC intervals of [90%, 100%), [80%, 70%), [70%, 50%) and [50%, 0%), where the weakening coefficient corresponding to the interval [90%, 100%) is 0.6; the weakening coefficient corresponding to the interval [80%, 70%) is 0.7; the weakening coefficient corresponding to the interval [70%, 50%) is 0.8; the weakening coefficient corresponding to the interval [50%, 0%) is 1 (i.e., no weakening is required). The SOC of the charging car corresponding to the car charging pile street lamp at the current moment is retrieved, and it is compared with all the set SOC intervals to match the corresponding weakening coefficient, recorded as k; the weakening coefficient and the load state index are calculated through the set formula The charging guidance power SD is obtained by calculation and analysis, and γ is the set charging power conversion coefficient. It can be seen from the formula that when the SOC is larger, the charging guidance power is appropriately reduced; when the load state index is larger, it means that the power grid has a larger power grid burden, and the charging power is smaller; thus, the charging guidance power corresponding to each car charging pile street lamp can be obtained, and the car charging power can be controlled accordingly, so that the car charging can be completed as quickly as possible while ensuring safety, improving energy utilization, and realizing intelligent control of car charging; By controlling characteristic parameters, the brightness in the lighting area and the charging power of the car charging pile street lights are dynamically adjusted, so that the light brightness in the lighting area can meet the actual needs in different environments, avoiding excessive lighting and thus saving energy; at the same time, the charging power is adjusted according to the battery's SOC range and load state index to make the charging process more efficient, avoid overcharging, reduce the burden on the power grid, and thus optimize energy utilization; energy utilization optimization and intelligent control of car charging pile street lights are achieved.

[0017] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A circuit control system for a car charging pile street light, characterized in that: include: Feature extraction module and circuit control module; The feature extraction module performs feature analysis on lighting and charging based on environmental information, energy storage information and vehicle information to extract control feature parameters, and sends them to the circuit control module; wherein the control feature parameters include a lighting adjustment index and a load state index; The circuit control module dynamically adjusts the lighting and charging strategies of the vehicle charging pile street lamps based on the control characteristic parameters; specifically: When the lighting adjustment index is greater than the set lighting adjustment threshold, the lighting of the car charging pile street light is adjusted. The specific steps of lighting adjustment are as follows: The vehicle flow and pedestrian flow corresponding to each collection time in the lighting area of ​​the automobile charging pile street lamp are retrieved, and the average values ​​are calculated to obtain the average vehicle flow and the average pedestrian flow, and the average vehicle flow and the average pedestrian flow are normalized and taken, and the brightness adjustment value is obtained by numerical analysis; the brightness of the automobile charging pile street lamp is adjusted according to the brightness adjustment value; It is assumed that there are several SOC intervals, each of which corresponds to a charge weakening coefficient; The SOC of the charging car corresponding to the car charging pile street lamp at the current moment is retrieved, and compared with all the set SOC intervals to match the corresponding weakening coefficient; the weakening coefficient and the load state index are normalized and their values ​​are taken, and the charging guidance power is obtained by numerical analysis, and the car charging power is controlled accordingly.

2. A circuit control system for a car charging pile street light according to claim 1, characterized in that: The specific process of lighting feature analysis is as follows: Retrieve the environmental information corresponding to each collection moment, where the environmental information includes the ambient brightness, vehicle flow, and pedestrian flow, normalize the information, obtain its value, and analyze the value to obtain the lighting related value; A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and lighting-related values ​​as the vertical coordinate. The lighting-related values ​​are plotted on the coordinate axis according to their corresponding collection time to obtain each lighting point. A smooth curve is used to connect each lighting point in sequence to obtain a curve relationship diagram of the lighting-related values ​​of the automobile charging pile street lamp changing with time. The lighting adjustment index is obtained by performing a graphical trend analysis on the relationship diagram of the lighting-related value changing over time.

3. A circuit control system for a car charging pile street light according to claim 2, characterized in that: The specific process of performing graphical trend analysis on the relationship between lighting related values ​​and time changes is as follows: A tangent line is drawn at the lighting point, and a tangent expression is obtained by data fitting. The tangent expression is derived to obtain the lighting derivative. The lighting derivatives greater than zero are summed to obtain the positive lighting correlation, and the lighting derivatives less than zero are summed and the absolute value is taken to obtain the negative lighting correlation. The lighting related value, lighting derivative, lighting positive correlation and lighting negative correlation are formulated and analyzed to obtain the lighting adjustment index.

4. A circuit control system for a car charging pile street light according to claim 1, characterized in that: The specific process of charging characteristic analysis is as follows: Retrieving energy storage information at each collection moment, wherein the energy storage information includes the charge load of each automobile charging pile street lamp; comparing and analyzing the charge load of each automobile charging pile street lamp with the set load interval to divide the automobile charging pile street lamp corresponding to the charge load into high load points, medium load points and low load points, and respectively counting the number of high load points, medium load points and low load points in the same power grid load area, and formulating and calculating and analyzing the high load points with the charge load of each automobile charging pile street lamp to obtain the power grid load value at each collection moment; A two-dimensional rectangular coordinate system is constructed with time as the horizontal coordinate and the power grid load value as the vertical coordinate. The power grid load value is plotted on the coordinate axis according to its corresponding collection time to obtain each load point. A smooth curve is used to connect each load point in sequence to obtain a curve graph of the power grid load value changing with time. The load state index is obtained by performing a graphical trend analysis on the graph of the grid load value changing over time.

5. A circuit control system for a car charging pile street light according to claim 4, characterized in that: The specific process of performing graphical trend analysis on the graph of power grid load value changing over time is as follows: Draw a tangent line at each load point, use data fitting to get a tangent line expression, and take the derivative of the tangent line expression to get the load derivative corresponding to each load point; sum the load derivatives greater than zero to get the load increase degree, and sum the load derivatives less than zero and take the absolute value to get the load reduction degree; The load value, load derivative, load increase degree and load reduction degree of the power grid at each acquisition moment are calculated and analyzed in a formulaic manner to obtain the load state index.

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