A highway DC long-distance intelligent power supply system based on cloud-edge collaboration and its control method

Abstract

The present invention relates to the field of smart power supply technology, and specifically, to a highway DC long-distance smart power supply system based on cloud-edge collaboration and a control method thereof. It includes a terminal device, which collects and displays real-time traffic data based on a power supply unit; a DC long-distance power supply host converts AC power into high-voltage DC power, and transmits it to a DC long-distance power supply extension through a power cable; the DC long-distance power supply extension converts the high-voltage DC power into low-voltage AC power, and finally supplies it to the terminal device for use; a monitoring and management platform monitors and manages the operating status of the entire power supply unit. The highway DC long-distance smart power supply system based on cloud-edge collaboration and a control method thereof can avoid system instability caused by load changes, reduce the generation of ripples, and improve the stability of the output voltage; at the same time, noise in different frequency ranges is gradually removed through a multi-stage filter, which can ensure that each stage can be optimized for a specific type of noise.

Description

Technical Field

[0001] The present invention relates to the field of smart power supply technology, and specifically to a highway DC long-distance smart power supply system based on cloud-edge collaboration and a control method thereof. Background Art

[0002] With the implementation of various highway plans, in the construction of future highways, highways will extend to mountainous areas, and with the implementation of smart highways and digital transportation, more and more scattered detectors, sensors and other electromechanical equipment along the line will face increasingly prominent power supply problems. In order to meet the power supply needs of highway electromechanical equipment, enrich the product line of long-distance power supply equipment, and improve the market competitiveness of products, it is imperative to develop a DC long-distance power supply system. Among them, nonlinear loads will cause fluctuations in current and voltage during the power supply process. Traditional PID control may not be able to effectively cope with these fluctuations, and nonlinear loads may cause cumulative errors in the integral term in PID control, thereby affecting the control effect. At the same time, traditional filters may perform poorly in different noise environments, and the filter coefficient needs to be manually adjusted. Noise interference will cause the power supply system to be unstable. Therefore, a highway DC long-distance smart power supply system based on cloud-edge collaboration and its control method are provided. Summary of the invention

[0003] The purpose of the present invention is to provide a highway DC long-distance intelligent power supply system based on cloud-edge collaboration and a control method thereof, so as to solve the problem proposed in the above background technology that the nonlinear load may cause the integral term cumulative error in PID control, thereby affecting the control effect, and the noise interference may cause the power supply system to be unstable.

[0004] To achieve the above objectives, on the one hand, the present invention aims to provide a highway DC long-distance intelligent power supply system based on cloud-edge collaboration, including:

[0005] A terminal device, wherein the terminal device collects and displays real-time traffic data based on the power supply unit;

[0006] A power supply unit, the power supply unit includes a DC long-distance power supply host and a DC long-distance power supply extension. The DC long-distance power supply host is used to convert AC power into high-voltage DC power, and transmit it to the DC long-distance power supply extension through a power cable. The DC long-distance power supply extension is used to convert the high-voltage DC power into low-voltage AC power, and finally supply it to the terminal device for use. The power supply unit can increase the voltage to reduce energy loss during the transmission process;

[0007] A monitoring and management platform, which is used to monitor and manage the operating status of the entire power supply unit and supports remote control. The monitoring and management platform includes a lower computer program. The monitoring and management platform can issue control instructions to the lower computer program. The lower computer program is used to communicate with the power supply unit, receive the operating data and alarm data of the power supply unit, and upload the operating data and alarm data to the monitoring and management platform, and at the same time receive and execute the instructions issued by the monitoring and management platform.

[0008] As a further improvement of the technical solution, the terminal equipment includes a video surveillance camera, an information board, a weather station and a gantry.

[0009] As a further improvement of the present technical solution, the DC remote power supply host includes a boost distribution module, a first monitoring and control module and a first display screen; wherein the boost distribution module converts the input AC power into high-voltage DC power, and distributes the converted high-voltage DC power to different output ports; the first monitoring and control module is responsible for monitoring the operating data of the DC remote power supply host, and uploading the operating data to the monitoring and management platform through the network interface; it is also responsible for status monitoring and fault diagnosis, and can also alarm when a fault occurs in the DC remote power supply host. At the same time, the alarm can be viewed through the first display screen, and the alarm data can be transmitted to the monitoring and management platform.

[0010] As a further improvement of the technical solution, the specific working process of the boost distribution module is as follows:

[0011] S1. Connect the input AC power to the filter, which can filter out noise and interference in the AC power. In the process of connecting the input AC power to the filter, a method of cascading multiple filters is introduced;

[0012] S2, converting the filtered AC power into DC power through a rectifier circuit, smoothing the rectified DC power through a large capacitor filter, and introducing nonlinear load and PID control compensation items in the process of smoothing the rectified DC power through a large capacitor filter for optimization;

[0013] S3, boosting the rectified DC power to high voltage DC power through a boost converter;

[0014] S4. Finally, the boosted high voltage direct current is distributed to different output ports through a distribution unit.

[0015] As a further improvement of the technical solution, the S1 is specifically as follows:

[0016] ;

[0017] in, For in time The filtered voltage; For in time Input voltage; is the number of noise frequencies; ; For in time No. The filter coefficient of each noise frequency; For in time No. The voltage at the noise frequency;

[0018] In the process of connecting the input AC power to the filter, a method of cascading multiple filters is introduced, and the multiple filters include a low-pass filter, a band-pass filter and a high-pass filter, as follows:

[0019] ;

[0020] in, For in time Voltage after low-pass filtering; For in time No. The filter coefficient of the high-frequency noise frequency; is the number of high-frequency noise frequencies; is the temperature compensation term; is the humidity compensation item; is the electromagnetic interference compensation item;

[0021] ;

[0022] in, For in time The voltage after bandpass filtering; For in time No. The filter coefficient of the noise frequency in a specific frequency range; is the number of noise frequencies within a specific frequency range;

[0023] ;

[0024] in, For in time Voltage after high-pass filtering; For in time No. The filter coefficient of the low-frequency noise frequency; is the number of low-frequency noise frequencies.

[0025] As a further improvement of the technical solution, the low-pass filter can remove high-frequency noise, the band-pass filter can remove noise in a specific frequency range, and the high-pass filter can remove low-frequency noise. The specific adjustments are as follows:

[0026] When the noise is high frequency noise: ;

[0027] in, For in time an error between the filtered signal and the first desired signal; For in time The first expected signal;

[0028] When the noise is within a specific frequency range: ;

[0029] in, For in time an error between the filtered signal and a second desired signal; For in time A second desired signal;

[0030] When the noise is low frequency noise: ;

[0031] in, For in time an error between the filtered signal and a third desired signal; For in time The third desired signal;

[0032] ;

[0033] in, For in time Adjusted filter coefficients; is the step size factor; For a collection; .

[0034] As a further improvement of this technical solution, S2 is specifically as follows:

[0035] ;

[0036] in, is the capacitance value; is the load current; is the sampling period; is the maximum ripple voltage;

[0037] In the process of large capacitor filtering and smoothing the rectified DC power, nonlinear load and PID control compensation items are introduced for optimization. The optimization results are as follows:

[0038] ;

[0039] in, For the optimized time The capacitance required when for time point; For in time The load current; For in time Maximum ripple voltage; is the nonlinear load sensitivity coefficient; is the rate of change of load current; For in time PID control compensation item when .

[0040] As a further improvement of the present technical solution, the DC long-distance power supply extension includes a step-down distribution module, a second monitoring and control module and a second display screen. The step-down distribution module is used to convert high-voltage direct current into low-voltage alternating current. The second monitoring and control module is responsible for monitoring the operating data of the DC long-distance power supply extension and uploading the operating data to the monitoring and management platform through the network interface. It is also responsible for status monitoring and fault diagnosis, and can also alarm when a fault occurs in the DC long-distance power supply extension. At the same time, the alarm can be viewed through the second display screen and the alarm data can be transmitted to the monitoring and management platform.

[0041] As a further improvement of the present technical solution, the monitoring management platform includes a global view, a total monitoring page, a power consumption analysis page, a report statistics page and a management page.

[0042] On the other hand, the present invention provides a method for controlling a highway DC long-distance intelligent power supply based on cloud-edge collaboration, which is used in the above-mentioned highway DC long-distance intelligent power supply system based on cloud-edge collaboration, and includes the following steps:

[0043] S10, the DC remote power supply host converts the input AC power into high-voltage DC power and transmits it to the DC remote power supply extension through the power cable. The DC remote power supply extension converts the high-voltage DC power into low-voltage AC power for use by the terminal equipment;

[0044] S20, the terminal equipment collects and displays real-time traffic data based on the power supply of the DC long-distance power supply host and the DC long-distance power supply extension;

[0045] S30, the DC remote power supply host and DC remote power supply extension monitor their own operating data, and upload their own operating data to the monitoring management platform through the network interface. They are also responsible for status monitoring and fault diagnosis, and issue an alarm when a fault occurs;

[0046] S40, the monitoring and management platform sends control instructions to the lower computer program, the lower computer program receives the operating data and alarm data of the DC long-distance power supply host and the DC long-distance power supply extension, and uploads the operating data and alarm data to the monitoring and management platform, and at the same time receives and executes the instructions sent by the monitoring and management platform.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] 1. In the highway DC long-distance intelligent power supply system based on cloud-edge collaboration and its control method, the nonlinear load compensation term can reduce error accumulation, improve the system's adaptability to nonlinear loads, avoid system instability caused by load changes, reduce ripple generation, and improve output voltage stability;

[0049] 2. In the highway DC long-distance intelligent power supply system based on cloud-edge collaboration and its control method, noise in different frequency ranges is gradually removed through multi-stage filters, which can ensure that each stage can be optimized for specific types of noise; through the error feedback mechanism, the filter coefficient is dynamically adjusted to ensure that the filter can adapt to different noise environments and signal characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is the overall flow chart of the present invention;

[0051] Figure 2 A flow chart of the overall method of the present invention;

[0052] The meaning of each number in the figure is:

[0053] 1. Terminal equipment; 2. Power supply unit; 21. DC long-distance power supply host; 22. DC long-distance power supply extension; 3. Monitoring and management platform; 31. Lower computer program. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0055] Example 1: Please refer to Figure 1 As shown, a highway DC long-distance intelligent power supply system based on cloud-edge collaboration is provided, including a terminal device 1, a power supply unit 2 and a monitoring and management platform 3; wherein,

[0056] The terminal device 1 collects and displays real-time traffic data based on the power supply unit 2; the terminal device 1 includes a video surveillance camera, an information board, a weather station and a gantry;

[0057] The power supply unit 2 includes a DC long-distance power supply host 21 and a DC long-distance power supply extension 22. The DC long-distance power supply host 21 is used to convert AC power into high-voltage DC power, and transmit it to the DC long-distance power supply extension 22 through a power cable. The DC long-distance power supply extension 22 is used to convert the high-voltage DC power into low-voltage AC power, and finally supply the terminal device 1 for use. The power supply unit 2 can increase the voltage to reduce the energy loss during the transmission process, so as to realize long-distance and efficient power supply;

[0058] The DC remote power supply host 21 includes a boost distribution module, a first monitoring and control module and a first display screen; wherein the boost distribution module converts the input AC power into high-voltage DC power, and distributes the converted high-voltage DC power to different output ports, ensuring that each output port can receive a suitable power supply, which is convenient for the access and management of subsequent equipment; the first monitoring and control module is responsible for monitoring the operating data of the DC remote power supply host 21, and uploading the operating data to the monitoring and management platform 3 through the network interface, and is also responsible for status monitoring and fault diagnosis, and can also alarm when a fault occurs in the DC remote power supply host 21, and at the same time, the alarm can be viewed through the first display screen, and the alarm data is transmitted to the monitoring and management platform 3;

[0059] The specific working process of the boost distribution module is as follows:

[0060] S1. Connect the input AC power to the filter, which can filter out noise and interference in the AC power. In the process of connecting the input AC power to the filter, a method of cascading multiple filters is introduced;

[0061] S2, converting the filtered AC power into DC power through a rectifier circuit, smoothing the rectified DC power through a large capacitor filter, which can reduce ripples, and introducing nonlinear loads and PID control compensation items in the process of smoothing the rectified DC power through a large capacitor filter for optimization;

[0062] S3, boosting the rectified DC power to high voltage DC power through a boost converter (such as a BOOST converter or an LLC resonant converter);

[0063] S4, finally distributing the boosted high voltage direct current to different output ports through a distribution unit;

[0064] S1 is as follows:

[0065] ;

[0066] in, For in time The filtered voltage; For in time Input voltage; is the number of noise frequencies; ; For in time No. The filter coefficient of each noise frequency; For in time No. The voltage at the noise frequency;

[0067] In the process of connecting the input AC power to the filter, a method of cascading multiple filters is introduced. The multiple filters include low-pass filters, band-pass filters and high-pass filters. The method of cascading multiple filters can gradually remove noise in different frequency ranges. The low-pass filter can remove high-frequency noise, the band-pass filter can remove noise in a specific frequency range, and the high-pass filter can remove low-frequency noise. The details are as follows:

[0068] ;

[0069] in, For in time Voltage after low-pass filtering; For in time No. The filter coefficient of the high-frequency noise frequency; is the number of high-frequency noise frequencies; is the temperature compensation term; is the humidity compensation item; is the electromagnetic interference compensation item;

[0070] Temperature changes can affect the performance of filter components, especially the parameters of capacitors and inductors; humidity changes may affect the insulation performance of filter components, resulting in performance degradation; at the same time, external electromagnetic interference may affect the performance of the filter, especially in the high frequency band; introducing the influence of temperature, humidity and electromagnetic interference in multi-stage filters can improve the performance and stability of the filter.

[0071] ;

[0072] in, For in time The voltage after bandpass filtering; For in time No. The filter coefficient of the noise frequency in a specific frequency range; is the number of noise frequencies within a specific frequency range;

[0073] ;

[0074] in, For in time Voltage after high-pass filtering; For in time No. The filter coefficient of the low-frequency noise frequency; is the number of low-frequency noise frequencies;

[0075] The low-pass filter can remove high-frequency noise, the band-pass filter can remove noise in a specific frequency range, and the high-pass filter can remove low-frequency noise. The specific adjustments are as follows:

[0076] When the noise is high frequency noise: ;

[0077] in, For in time an error between the filtered signal and the first desired signal; For in time The first expected signal;

[0078] When the noise is within a specific frequency range: ;

[0079] in, For in time an error between the filtered signal and a second desired signal; For in time A second desired signal;

[0080] When the noise is low frequency noise: ;

[0081] in, For in time an error between the filtered signal and a third desired signal; For in time The third desired signal;

[0082] ;

[0083] in, For in time Adjusted filter coefficients; is the step size factor, which is a parameter that controls the update speed of the filter coefficients. A larger step size factor will lead to faster convergence, but may also cause instability; a smaller step size factor will lead to slower convergence, but more stable; For a collection; ;

[0084] In this way, noise in different frequency ranges is gradually removed through multi-stage filters (low-pass filter, band-pass filter and high-pass filter), which ensures that each stage can be optimized for a specific type of noise; through the error feedback mechanism, the filter coefficient is dynamically adjusted to ensure that the filter can adapt to different noise environments and signal characteristics.

[0085] S2 is as follows: ;

[0086] in, is the capacitance value; is the load current; is the sampling period; is the maximum ripple voltage; this formula uses the current sensor to measure the load current , and determine the sampling period according to system requirements , and then set the maximum allowable ripple voltage according to system requirements Finally, the required capacitance value is calculated according to the above formula , based on the calculation results, dynamically adjust the capacitance value to reduce the ripple.

[0087] In the process of large capacitor filtering and smoothing the rectified DC power, nonlinear load and PID control compensation items are introduced for optimization. The optimization results are as follows:

[0088] ;

[0089] in, For the optimized time The capacitance required when for time point; For in time The load current; For in time Maximum ripple voltage; is the nonlinear load sensitivity coefficient, which indicates the influence of the load current change rate on the capacitance value; is the rate of change of load current; For in time PID control compensation item when ;

[0090] Nonlinear loads can cause fluctuations in current and voltage. Traditional PID control may not be able to effectively cope with these fluctuations. Nonlinear loads may cause cumulative errors in the integral term of PID control, thereby affecting the control effect. Nonlinear load compensation terms can help reduce this error accumulation. Introducing nonlinear load compensation terms can improve the system's adaptability to nonlinear loads.

[0091] By dynamically adjusting the capacitance value, the system can remain stable under nonlinear loads, avoiding system instability caused by load changes. The system can operate more reliably and maintain good performance even when the load changes greatly or there are nonlinear characteristics. Furthermore, it can respond quickly to load changes, reduce ripple generation, and improve output voltage stability.

[0092] The DC long-distance power supply extension 22 includes a step-down distribution module, a second monitoring control module and a second display screen. The step-down distribution module is used to convert high-voltage DC power into low-voltage AC power. The second monitoring control module is responsible for monitoring the operation data of the DC long-distance power supply extension 22 and uploading the operation data to the monitoring management platform 3 through the network interface. It is also responsible for status monitoring and fault diagnosis, and can also alarm when a fault occurs in the DC long-distance power supply extension 22. At the same time, the alarm can be viewed through the second display screen, and the alarm data is transmitted to the monitoring management platform 3;

[0093] The DC long-distance power supply extension 22 also has the function of automatic protection of overvoltage and undervoltage of the power supply line input, and undervoltage, overvoltage, overload, overcurrent, open circuit, short circuit and leakage protection of the power supply line output; when the fault is eliminated, the system can automatically restore power supply;

[0094] The monitoring and management platform 3 is used to monitor and manage the operating status of the entire power supply unit 2, and supports remote control. The monitoring and management platform 3 includes a lower computer program 31. The monitoring and management platform 3 can issue control instructions to the lower computer program 31. The lower computer program 31 is used to communicate with the power supply unit 2, receive the operating data and alarm data of the power supply unit 2, and upload the operating data and alarm data to the monitoring and management platform 3, and receive and execute the instructions issued by the monitoring and management platform 3;

[0095] Monitoring and management platform 3 includes global view, total monitoring page, power consumption analysis page, report statistics page and management page;

[0096] The global view displays the spatial location distribution and spatial structure of the remote power supply equipment, and also displays the operating status information and equipment fault alarm information of the DC remote power supply host 21 and the DC remote power supply extension 22;

[0097] The general monitoring page includes the equipment data processing module, the equipment command issuing module, the equipment real-time alarm module, the data trend analysis module and the fault status display module; the entire page divides the distribution structure of the DC remote power supply host 21 and the DC remote power supply extension 22 in detail, and the left side displays the list of the DC remote power supply host 21 including the name and network IP of the equipment, and the right side displays the operation status of the DC remote power supply host 21 and the operation status of the subordinate DC remote power supply extension 22. The main parameters include A, B, C three-phase voltage, output voltage, output current, load, frequency, temperature and network IP, etc.

[0098] Real-time data chart trend analysis of 21 devices in the DC remote power supply host can be analyzed based on four dimensions: voltage, current, power, and temperature. Real-time data chart trend analysis of extension devices can be analyzed based on seven dimensions: input voltage, output voltage, output current, input frequency, output frequency, load percentage, and temperature.

[0099] The power consumption analysis page analyzes the trend of real-time and historical data of the DC remote power supply host 21 and DC remote power supply extension 22, providing guidance data support for later operation and maintenance;

[0100] The report statistics page provides detailed statistics on the equipment alarm data and equipment and system operation records during the entire project use process. The alarm data records in detail the alarm device number, alarm content, alarm fault point, alarm type and alarm occurrence time;

[0101] On the management page, users can manage operator accounts to add, modify, and delete accounts. They can also assign corresponding operation permissions and viewing permissions to different users.

[0102] Specifically, the system consists of a DC remote power supply host 21, a DC remote power supply extension 22, a lower computer program 31, and a remote power supply integrated monitoring and management platform 3. The DC remote power supply host 21 converts the 380Vac voltage of the mains into 500-1000Vdc DC high voltage, and transmits it to the DC remote power supply extension 22 through a 10-16mm² power cable. The DC remote power supply extension 22 then converts the 500-1000Vdc DC high voltage into 220Vac to power electrical equipment such as highway video surveillance, information boards, weather stations, and gantries. The remote power supply integrated monitoring and management platform 3 monitors the DC remote power supply host 21, the DC remote power supply extension 22, and the devices connected thereto by exchanging data with the lower computer program 31. It monitors the operating status, alarm data, switch status, device parameters, etc. of the corresponding equipment, and can also issue commands to specific equipment to control the remote device to turn on and off, adjust parameters, etc.

[0103] Example 2: The difference between Example 2 of the present invention and Example 1 is that this example introduces the static mechanical performance collection, analysis and control method used by the above-mentioned highway DC long-distance intelligent power supply system based on cloud-edge collaboration.

[0104] See also Figure 2 As shown, a method for controlling a direct current long-distance intelligent power supply for a highway based on cloud-edge collaboration is provided, which is used for the above-mentioned direct current long-distance intelligent power supply system for a highway based on cloud-edge collaboration, and includes the following steps:

[0105] S10, the DC remote power supply host 21 converts the input AC power into high-voltage DC power and transmits it to the DC remote power supply extension 22 through the power cable. The DC remote power supply extension 22 converts the high-voltage DC power into low-voltage AC power for use by the terminal device 1;

[0106] S20, the terminal device 1 collects and displays real-time traffic data based on the power supply of the DC remote power supply host 21 and the DC remote power supply extension 22;

[0107] S30, the DC remote power supply host 21 and the DC remote power supply extension 22 monitor their own operating data, and upload their own operating data to the monitoring management platform 3 through the network interface, and are responsible for status monitoring and fault diagnosis, and alarm when a fault occurs;

[0108] S40, the monitoring and management platform 3 sends control instructions to the lower computer program 31, the lower computer program 31 receives the operating data and alarm data of the DC long-distance power supply host and the DC long-distance power supply extension, and uploads the operating data and alarm data to the monitoring and management platform 3, and at the same time receives and executes the instructions issued by the monitoring and management platform 3.

[0109] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A highway DC long-distance intelligent power supply system based on cloud-edge collaboration, characterized in that: include: A terminal device (1), wherein the terminal device (1) collects and displays real-time traffic data based on a power supply unit (2); A power supply unit (2), the power supply unit (2) comprising a DC long-distance power supply host (21) and a DC long-distance power supply extension (22), the DC long-distance power supply host (21) being used to convert AC power into high-voltage DC power, and transmit the power to the DC long-distance power supply extension (22) via a power cable, the DC long-distance power supply extension (22) being used to convert the high-voltage DC power into low-voltage AC power, and finally supplying the terminal device (1) for use, the power supply unit (2) being able to increase the voltage to reduce energy loss during the transmission process; The DC remote power supply host (21) comprises a boost distribution module, a first monitoring control module and a first display screen; wherein the boost distribution module converts the input alternating current into high-voltage direct current, and distributes the converted high-voltage direct current to different output ports; the first monitoring control module is responsible for monitoring the operation data of the DC remote power supply host (21), and uploading the operation data to the monitoring management platform (3) through a network interface, and is also responsible for status monitoring and fault diagnosis, and can also issue an alarm when a fault occurs in the DC remote power supply host (21). At the same time, the alarm can be viewed through the first display screen, and the alarm data is transmitted to the monitoring management platform (3). The specific working process of the boost distribution module is as follows: S1. Connect the input AC power to the filter, which can filter out noise and interference in the AC power. In the process of connecting the input AC power to the filter, a method of cascading multiple filters is introduced; S2, converting the filtered AC power into DC power through a rectifier circuit, smoothing the rectified DC power through a large capacitor filter, and introducing nonlinear load and PID control compensation items in the process of smoothing the rectified DC power through a large capacitor filter for optimization; S3, boosting the rectified DC power to high voltage DC power through a boost converter; S4, finally distributing the boosted high voltage direct current to different output ports through a distribution unit; A monitoring and management platform (3), the monitoring and management platform (3) is used to monitor and manage the operating status of the entire power supply unit (2), supports remote control, the monitoring and management platform (3) includes a lower computer program (31), the monitoring and management platform (3) can issue control instructions to the lower computer program (31), the lower computer program (31) is used to communicate with the power supply unit (2), receive operating data and alarm data of the power supply unit (2), and upload the operating data and alarm data to the monitoring and management platform (3), and at the same time receive and execute instructions issued by the monitoring and management platform (3); The S1 is specifically as follows: Among them, V filtered (t) is the voltage after filtering at time t; V in (t) is the input voltage at time t; n is the number of noise frequencies; i = 1, 2, ..., n; H i (t) is the filter coefficient of the i-th noise frequency at time t; is the voltage of the ith noise frequency at time t; In the process of connecting the input AC power to the filter, a method of cascading multiple filters is introduced, and the multiple filters include a low-pass filter, a band-pass filter and a high-pass filter, as follows: Among them, V LP (t) is the voltage after low-pass filtering at time t; is the filter coefficient of the ith high-frequency noise frequency at time t; n0 is the number of high-frequency noise frequencies; ΔV temp (t) is the temperature compensation term; ΔV humidity (t) is the humidity compensation term; ΔV EMI (t) is the electromagnetic interference compensation item; Among them, V BP (t) is the voltage after bandpass filtering at time t; is the filter coefficient of the noise frequency in the i-th specific frequency range at time t; n1 is the number of noise frequencies in the specific frequency range; Among them, V HP (t) is the voltage after high-pass filtering at time t; is the filter coefficient of the i-th low-frequency noise frequency at time t; n2 is the number of low-frequency noise frequencies; The low-pass filter can remove high-frequency noise, the band-pass filter can remove noise in a specific frequency range, and the high-pass filter can remove low-frequency noise. The specific adjustments are as follows: When the noise is high frequency noise: e1(t)=V desired1 (t)-V LP (t); Where e1(t) is the error between the filtered signal and the first expected signal at time t; V desired1 (t) is the first desired signal at time t; When the noise is within a specific frequency range: e2(t)=V desired2 (t)-V BP (t)? Wherein, e2(t) is the error between the filtered signal and the second desired signal at time t; V desired2 (t) is the second desired signal at time t; When the noise is low frequency noise: e3(t)=V desired3 (t)-V HP (t); Wherein, e3(t) is the error between the filtered signal at time t and the third desired signal; V desired3 (t) is the third desired signal at time t; Among them, H i (t+1) is the filter coefficient adjusted at time t+1; μ is the step size factor; e(t) is a set; e(t) = {e1(t), e2(t), e3(t)}; The S2 is specifically as follows: Where C is the capacitance value; I load is the load current; Δt is the sampling period; ΔV is the maximum ripple voltage; In the process of large capacitor filtering and smoothing the rectified DC power, nonlinear load and PID control compensation items are introduced for optimization. The optimization results are as follows: Wherein, C'(t0) is the capacitance required at time t0 after optimization; t0 is the time point; I load (t0) is the load current at time t0; ΔV(t0) is the maximum ripple voltage at time t0; K nonlinear is the nonlinear load sensitivity coefficient; is the rate of change of load current; ΔC PID (t0) is the PID control compensation term at time t0.

2. According to the cloud-edge collaboration-based highway DC long-distance intelligent power supply system of claim 1, it is characterized by: The terminal device (1) comprises a video surveillance camera, an information board, a weather station and a gantry.

3. The highway DC long-distance intelligent power supply system based on cloud-edge collaboration according to claim 2 is characterized by: The DC long-distance power supply extension (22) comprises a voltage reduction distribution module, a second monitoring control module and a second display screen.

4. The highway DC long-distance intelligent power supply system based on cloud-edge collaboration according to claim 3 is characterized by: The step-down distribution module is used to convert high-voltage direct current into low-voltage alternating current. The second monitoring and control module is responsible for monitoring the operating data of the direct current long-distance power supply extension (22) and uploading the operating data to the monitoring and management platform (3) through a network interface. The second monitoring and control module is also responsible for status monitoring and fault diagnosis. It can also issue an alarm when a fault occurs in the direct current long-distance power supply extension (22). At the same time, the alarm can be viewed through a second display screen and the alarm data is transmitted to the monitoring and management platform (3).

5. The highway DC long-distance intelligent power supply system based on cloud-edge collaboration according to claim 4 is characterized by: The monitoring management platform (3) comprises a global view, a total monitoring page, a power consumption analysis page, a report statistics page and a management page.

6. A method for controlling direct current long-distance intelligent power supply for highways based on cloud-edge collaboration, used in a direct current long-distance intelligent power supply system for highways based on cloud-edge collaboration as claimed in any one of claims 1 to 5, characterized in that: The steps include: S10, the DC remote power supply host (21) converts the input AC power into high-voltage DC power and transmits it to the DC remote power supply extension (22) via a power cable. The DC remote power supply extension (22) converts the high-voltage DC power into low-voltage AC power for use by the terminal device (1); S20, the terminal device (1) collects and displays real-time traffic data based on the power supply of the DC long-distance power supply host (21) and the DC long-distance power supply extension (22).

7. The method for controlling direct current long-distance intelligent power supply for highways based on cloud-edge collaboration according to claim 6 is characterized in that: The following steps are also included: S30, the DC remote power supply host (21) and the DC remote power supply extension (22) monitor their own operating data and upload their own operating data to the monitoring management platform (3) through the network interface. They are also responsible for status monitoring and fault diagnosis and issue an alarm when a fault occurs. S40, the monitoring and management platform (3) sends a control instruction to the lower computer program (31), the lower computer program (31) receives the operating data and alarm data of the DC long-distance power supply host and the DC long-distance power supply extension, and uploads the operating data and alarm data to the monitoring and management platform (3), and at the same time receives and executes the instructions sent by the monitoring and management platform (3).

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