Power supply control system and control method

Abstract

The present invention discloses a power supply control system and a control method, which specifically relate to the technical field of power supply control. By real-time monitoring and evaluating the impact of laser forming equipment on a power grid and power grid voltage fluctuations, it is possible to timely identify and respond to power supply problems that may have a negative impact on the stability of the laser forming equipment. A comprehensive analysis is performed on the load changes of the laser forming equipment, the deviation caused by the power supply, and the response capability of the power supply, and power supply control is performed accordingly, thereby improving the overall efficiency and stability of the system, achieving more accurate and dynamic power supply management, optimizing power supply output to adapt to specific working conditions, and evaluating the degree of deviation of a laser beam forming process within a preset range in hours, which is conducive to understanding the impact of the power supply on the deviation of the laser beam forming process and discovering the potential impact of the power supply on production in advance.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply control, and more specifically, to a power supply control system and a control method. Background Art

[0002] When high-precision laser forming equipment is performing precision processing, such as 3D printing, cutting or welding, the stability of its power supply is very important for the manufacturing quality; power supply fluctuations may cause unstable laser output, thereby affecting the uniformity and dimensional accuracy of the formed layer; for example, in the process of laser melting of metal powder, slight fluctuations in the power supply may cause changes in the molten pool temperature, thereby affecting the melting and solidification process, and ultimately affecting the mechanical properties and geometric accuracy of the formed parts.

[0003] Traditional power control strategies mainly rely on simple feedback systems and basic regulation techniques. These systems may be sufficient to cope with slow or predictable load changes, but when faced with rapidly changing grid conditions and complex internal load changes, they usually lack predictive functions and real-time data processing capabilities, and cannot instantly identify and adapt to the rapid changes in the power demand of laser forming equipment.

[0004] In order to solve the above problems, a technical solution is now provided. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a power control system and a control method to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A power control method comprises the following steps:

[0008] S1: Real-time evaluation of the impact of load changes of laser forming equipment on the power grid; monitoring of real-time fluctuations in power grid voltage;

[0009] S2: According to the degree of influence of the load change of the laser forming equipment on the power grid and the real-time fluctuation degree of the power grid voltage, the external adverse influence on the power supply stability of the laser forming equipment is divided into large external adverse influence or small external adverse influence;

[0010] S3: When the external risk level is high, an alarm is sounded; when the external adverse impact is low, the deviation level of the laser beam forming process within a preset interval is evaluated, and the deviation level of the laser beam forming process within the preset interval is classified as large or small through threshold comparison;

[0011] S4: when the deviation degree of the laser beam forming process within the preset interval is small, evaluating the degree of the deviation of the laser beam forming process caused by the power supply within the preset interval; analyzing the response speed of the power supply to the load change, and evaluating the response capability of the power supply to the load change;

[0012] S5: Comprehensively analyze the degree of influence of the load change of the laser forming equipment on the power grid, the degree of deviation of the laser beam forming process caused by the power supply within a preset range, and the response capability of the power supply to the load change, and perform power supply control according to the comprehensive analysis results.

[0013] In a preferred embodiment, in S1, the degree of influence of the load change of the laser forming equipment on the power grid is evaluated in real time, specifically:

[0014] Obtain the rated complex power of the laser forming equipment;

[0015] Obtaining the reference complex power of the power grid system;

[0016] Get the reference impedance. The reference impedance formula is: ;in, is the reference impedance, is the reference voltage of the power grid system, is the reference complex power of the power grid system;

[0017] Obtain the line impedance from the power supply to the laser forming equipment;

[0018] Calculate the load impact index, the expression is: ;in, is the load impact index, is the rated complex power of the laser forming equipment, is the line impedance from the power supply to the laser forming equipment.

[0019] In a preferred embodiment, the real-time fluctuation degree of the grid voltage is monitored, specifically:

[0020] Calculate the voltage standard deviation within the voltage monitoring interval, and its expression is: ;in, is the voltage standard deviation within the voltage monitoring interval, It is the first The measured grid voltage value, is the average value of the grid voltage in the voltage monitoring interval, is the number of times the grid voltage is measured within the voltage monitoring interval, It is the number of the grid voltage value measured within the voltage monitoring interval. ,and Is a positive integer.

[0021] In a preferred embodiment, in S2, according to the degree of influence of the load change of the laser forming equipment on the power grid and the real-time fluctuation degree of the power grid voltage, the external adverse influence on the power supply stability of the laser forming equipment is divided into large external adverse influence or small external adverse influence, specifically:

[0022] Set the load impact index threshold corresponding to the load impact index;

[0023] Set a voltage standard deviation threshold corresponding to the voltage standard deviation;

[0024] When the load influence index is less than the load influence index threshold and the voltage standard deviation is less than the voltage standard deviation threshold, it is determined that the external adverse influence on the power supply stability of the laser forming equipment is small; otherwise, it is determined that the external adverse influence on the power supply stability of the laser forming equipment is large.

[0025] In a preferred embodiment, in S3, when the adverse external influence is small, the deviation degree of the laser beam forming process within the preset interval is evaluated, and the deviation degree of the laser beam forming process within the preset interval is divided into large or small by threshold comparison, specifically:

[0026] Collect real-time data on laser power from laser forming equipment;

[0027] Get at time point The actual measured power value at the time point The set power value;

[0028] Calculate each time point The power deviation is expressed as: ;in, For time point The power deviation, At time points The actual measured power value and the The set power value;

[0029] Analyze the overall power deviation within the preset interval and calculate the power deviation index. The power deviation index is the power deviation index at a time point within the preset interval. The average value of the power deviation;

[0030] A power deviation index threshold is set; the power deviation index is compared with the power deviation index threshold:

[0031] When the power deviation index is greater than the power deviation index threshold, it is determined that the deviation of the laser beam forming process within the preset interval is large;

[0032] When the power deviation degree index is less than or equal to the power deviation degree index threshold, it is determined that the deviation degree of the laser beam forming process within the preset interval is small.

[0033] In a preferred embodiment, in S4, when the deviation degree of the laser beam forming process within the preset interval is small, the degree of the deviation of the laser beam forming process caused by the power supply within the preset interval is evaluated, specifically:

[0034] Collect data related to laser forming equipment power supply parameters and laser output deviations;

[0035] Clean and synchronize the collected data;

[0036] The power supply-induced deviation index is calculated based on the correlation coefficient, and its expression is: ;in, is the power supply-induced deviation index, They are the power parameters and power deviation of a single sample point within the preset interval. are the average values ​​of power supply parameters and power deviation respectively, is the number of the sample point in the preset interval, Is a positive integer.

[0037] In a preferred embodiment, the response speed of the power supply to the load change is analyzed to evaluate the response capability of the power supply to the load change, specifically:

[0038] Obtain multiple load change processes closest to real time, and obtain the response speed of the laser forming equipment power supply corresponding to each load change process;

[0039] The response speed of the laser forming equipment power supply is the time interval from detecting a change in load demand to the time when the power supply output stably matches the demand;

[0040] The change range of the response speed of the power supply of the multiple laser forming equipment closest to the real time is analyzed, and the power load response index is calculated, and its expression is: ;in, is the power supply load response index, is the number of load change processes obtained, is the number of the load change process obtained, , is a positive integer; Respectively The response speed of the laser forming equipment power supply corresponding to the load change process and the The response speed of the laser forming equipment power supply corresponding to the load change process.

[0041] In a preferred embodiment, in S5, the degree of influence of the load change of the laser forming equipment on the power grid, the degree of deviation of the laser beam forming process caused by the power supply within a preset interval, and the responsiveness of the power supply to the load change are comprehensively analyzed, and the power supply control is performed according to the comprehensive analysis result, specifically:

[0042] The load impact index, the power supply-induced deviation index, and the power supply load response index are normalized, and after the normalized load impact index, the power supply-induced deviation index, and the power supply load response index are assigned preset proportional coefficients respectively, the power supply risk assessment coefficient is calculated;

[0043] A power risk assessment threshold is set; and a power risk assessment coefficient is compared with the power risk assessment threshold:

[0044] When the power risk assessment coefficient is less than or equal to the power risk assessment threshold, it is determined that a power supply normal operation signal is generated;

[0045] When the power supply risk assessment coefficient is less than or equal to the power supply risk assessment threshold, it is determined that a power supply operation danger alarm signal is generated;

[0046] After a power supply operation danger alarm signal is generated, measures taken include emergency inspection and diagnosis, alarm issuance, and fault repair.

[0047] On the other hand, the present invention provides a power supply control system, including an external influence analysis module, an external influence judgment module, an external alarm module, a laser deviation judgment module, a power supply caused analysis module, a load response evaluation module and a power supply comprehensive control module;

[0048] The external impact analysis module evaluates in real time the impact of load changes of the laser forming equipment on the power grid; monitors the real-time fluctuation of the power grid voltage;

[0049] The external impact judgment module classifies the external adverse impact on the power supply stability of the laser forming equipment into large external adverse impact or small external adverse impact according to the degree of impact of the load change of the laser forming equipment on the power grid and the real-time fluctuation degree of the power grid voltage;

[0050] When the external risk level is high, the external alarm module sounds an alarm;

[0051] When the adverse external influence is small, the laser deviation judgment module evaluates the deviation degree of the laser beam forming process within the preset interval, and classifies the deviation degree of the laser beam forming process within the preset interval as large or small through threshold comparison;

[0052] When the degree of deviation of the laser beam forming process within the preset interval is small, the power supply-induced analysis module evaluates the degree of deviation of the laser beam forming process caused by the power supply within the preset interval;

[0053] The load response evaluation module analyzes the response speed of the power supply to load changes and evaluates the power supply's ability to respond to load changes;

[0054] The power integrated control module comprehensively analyzes the impact of the load change of the laser forming equipment on the power grid, the degree of deviation of the laser beam forming process caused by the power supply within a preset range, and the power supply's response capability to load changes, and performs power supply control based on the comprehensive analysis results.

[0055] The technical effects and advantages of a power supply control system and control method of the present invention are as follows:

[0056] 1. By real-time monitoring and evaluating the impact of laser forming equipment on the power grid and grid voltage fluctuations, it is possible to promptly identify and respond to power supply problems that may have a negative impact on the stability of laser forming equipment. This preventive monitoring reduces laser output deviations caused by unstable power supply and ensures the accuracy and repeatability of the laser processing process, which is crucial to achieving high-quality processing results.

[0057] 2. Comprehensively analyze the load changes of laser forming equipment, the deviation caused by the power supply, and the responsiveness of the power supply, and perform power supply control accordingly, which improves the overall efficiency and stability of the system. Through a comprehensive evaluation of these key parameters, more accurate and dynamic power management can be achieved, and the power output can be optimized to adapt to specific working conditions. This not only enhances the reliability of laser forming equipment operation and reduces downtime and maintenance costs caused by power problems, but also ensures the consistency and high standards of laser processing quality, improving production efficiency and product quality.

[0058] 3. The evaluation conducted when the deviation of the laser beam forming process within the preset range is small enables the power management system to timely identify and adapt to those slight deviations caused by power fluctuations, which is conducive to understanding the impact of power supply on the deviation of the laser beam forming process and discovering the potential impact of power supply on production in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 A schematic diagram of a power supply control method of the present invention;

[0060] Figure 2 The figure is a schematic diagram of the structure of a power supply control system of the present invention. DETAILED DESCRIPTION

[0061] 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. Example

[0062] Figure 1 The present invention provides a power supply control method, which comprises the following steps:

[0063] S1: Real-time evaluation of the impact of load changes of laser forming equipment on the power grid; monitoring of real-time fluctuations in grid voltage.

[0064] S2: According to the degree of influence of the load change of the laser forming equipment on the power grid and the real-time fluctuation degree of the power grid voltage, the external adverse influence on the power supply stability of the laser forming equipment is divided into large external adverse influence or small external adverse influence.

[0065] S3: When the external risk level is high, an alarm is sounded; when the external adverse impact is low, the deviation degree of the laser beam forming process within the preset interval is evaluated, and the deviation degree of the laser beam forming process within the preset interval is classified as large or small through threshold comparison.

[0066] S4: When the degree of deviation of the laser beam forming process within the preset interval is small, the degree of deviation of the laser beam forming process caused by the power supply within the preset interval is evaluated; the response speed of the power supply to the load change is analyzed, and the response capability of the power supply to the load change is evaluated.

[0067] S5: Comprehensively analyze the degree of influence of the load change of the laser forming equipment on the power grid, the degree of deviation of the laser beam forming process caused by the power supply within a preset range, and the response capability of the power supply to the load change, and perform power supply control according to the comprehensive analysis results.

[0068] In S1, the impact of load changes of the laser forming equipment on the power grid is evaluated in real time, specifically:

[0069] The power demand of laser forming equipment during operation may cause significant fluctuations in the power grid. If this fluctuation is not properly managed, it may cause unstable operation of the laser forming equipment or even damage the laser forming equipment. By monitoring these changes, the laser forming equipment settings or power configuration can be adjusted in time to adapt to the power grid conditions and maintain the stability of the laser forming equipment operation.

[0070] The quality of the power grid directly affects the stable output of the laser. Voltage fluctuations may cause unstable laser power and affect the forming quality. Real-time monitoring and adjustment can ensure the continuity and consistency of laser output, thereby improving product quality.

[0071] Get the rated complex power of the laser forming equipment in volt-amperes (VA). This is provided by the laser forming equipment manufacturer and represents the power requirements of the laser forming equipment when operating at full capacity.

[0072] Get the reference complex power of the power grid system in volt-amperes (VA). The reference complex power of the power grid system is usually a standard parameter in power grid design and is used to regulate and compare various calculations in the power grid.

[0073] Obtain the reference impedance. The reference impedance is calculated from the reference voltage and reference power of the power grid system. The formula is: ;in, is the reference impedance, is the reference voltage of the power grid system, It is the reference complex power of the power grid system. The reference voltage of the power grid system and the reference complex power of the power grid system are usually provided by the power grid operator or the local power grid management department.

[0074] Obtain the line impedance from the power supply to the laser forming device. The line impedance from the power supply to the laser forming device can be obtained by measurement. The line impedance from the power supply to the laser forming device includes the influence of resistance and inductance. The line impedance from the power supply to the laser forming device reflects the transmission characteristics of the power supply line.

[0075] Calculate the load impact index, the expression is: ;in, is the load impact index, is the rated complex power of the laser forming equipment, is the line impedance from the power supply to the laser forming equipment.

[0076] The larger the load impact index is, the more serious the potential grid stability problem is, and the more it affects the stable operation of the laser forming equipment power supply.

[0077] Monitor the real-time fluctuation of the grid voltage, specifically:

[0078] Set the voltage monitoring interval. The voltage monitoring interval is a real-time monitoring interval, and its end point is always a real-time time point. The time length of the voltage monitoring interval is set according to the actual voltage monitoring requirements and other actual conditions, which will not be repeated here.

[0079] Real-time monitoring of grid voltage. Grid voltage is monitored directly on the power line or at the access point of the laser forming equipment by installing voltage sensors. These sensors can provide high-precision voltage measurement.

[0080] Calculate the voltage standard deviation within the voltage monitoring interval, and its expression is: ;in, is the voltage standard deviation within the voltage monitoring interval, It is the first The measured grid voltage value, is the average value of the grid voltage in the voltage monitoring interval, is the number of times the grid voltage is measured within the voltage monitoring interval, It is the number of the grid voltage value measured within the voltage monitoring interval. ,and Is a positive integer.

[0081] The larger the voltage standard deviation within the voltage monitoring interval, the greater the real-time fluctuation of the grid voltage, which will affect the stable operation of the laser forming equipment power supply.

[0082] In S2, according to the degree of influence of the load change of the laser forming equipment on the power grid and the real-time fluctuation degree of the power grid voltage, the external adverse influence on the power supply stability of the laser forming equipment is divided into large external adverse influence or small external adverse influence, specifically:

[0083] Set the load impact index threshold corresponding to the load impact index. For example, if the load impact index exceeds 0.1 (load impact index threshold), the impact of the laser forming equipment on the power grid is considered to be "large", otherwise it is considered to be "small". The specific value needs to be adjusted according to the capacity and sensitivity of the power grid and the specific characteristics of the laser forming equipment. It can be set based on the following factors:

[0084] Grid Capacity and Stability: Smaller or less stable grids are more sensitive to load changes. In such grids, lower load impact index thresholds may be more appropriate to ensure that even relatively small load changes are noticed and managed.

[0085] Historical data analysis: Analyzing historical operating data, especially when the power grid fluctuates or fails while the laser forming equipment is operating, can help determine a threshold that enables the system to take proactive action when similar conditions occur again.

[0086] Safety and efficiency considerations: Safety and efficiency need to be balanced. Setting a threshold that is too low may result in frequent unnecessary outages, while setting a threshold that is too high may ignore important grid load issues. Choosing an appropriate threshold can maximize the operating efficiency of the laser forming equipment while ensuring system safety.

[0087] The voltage standard deviation threshold corresponding to the voltage standard deviation can be set based on the following factors:

[0088] Grid standards and regulations: Utilities or standardization bodies in each region may have specific regulations regarding voltage fluctuations that can provide a benchmark for setting thresholds.

[0089] Laser forming equipment sensitivity: Different laser forming equipment has different sensitivities to voltage fluctuations. For highly sensitive laser forming equipment, a lower threshold may need to be set to ensure that voltage fluctuations do not affect the performance of the laser forming equipment.

[0090] Actual operation impact: By monitoring the actual operating performance of the laser forming equipment under different voltage fluctuation conditions, a threshold can be set more accurately. This threshold should ensure that the laser forming equipment can operate in a safe and stable voltage environment most of the time.

[0091] When the load impact index is low, it means that the rated power of the laser forming equipment is small relative to the base power of the power grid, or the power line impedance is high, making the overall impact of the laser forming equipment on the power grid small. In this case, the operation changes of the laser forming equipment have little effect on the overall stability of the power grid.

[0092] On the contrary, a high load impact index indicates that the operation of the laser forming equipment may cause significant load fluctuations on the power grid, especially when the power demand increases sharply, which may pose a threat to the stability of the power grid.

[0093] A smaller voltage standard deviation indicates that the grid voltage is more stable with less fluctuations. This generally means that the grid can effectively resist external disturbances, including sudden load changes.

[0094] A larger voltage standard deviation indicates a larger grid voltage fluctuation, which may be due to insufficient grid capacity, improper grid design, or the influence of other laser forming equipment.

[0095] Therefore, when the load influence index is less than the load influence index threshold and the voltage standard deviation is less than the voltage standard deviation threshold, it is determined that the external adverse influence on the power supply stability of the laser forming equipment is small; otherwise, it is determined that the external adverse influence on the power supply stability of the laser forming equipment is large.

[0096] By monitoring these two parameters and taking measures accordingly, it is possible to prevent the laser forming equipment from operating when the power grid is unstable, thereby reducing laser forming equipment failures and downtime and improving production efficiency. Taking measures such as early warning or reducing load when it is judged that the adverse external influence is large will help protect the power grid from sudden large loads or high fluctuations, thereby maintaining the overall health of the power grid and the continuity of operation.

[0097] In S3, when the external risk level is high, an alarm is issued, specifically:

[0098] When the external adverse influence on the stability of the power supply of the laser forming equipment is large, the power supply of the laser forming equipment is controlled. The specific measures include:

[0099] Automatic power off: When serious power instability is detected, the system can automatically disconnect the power supply to prevent damage to the laser forming equipment or operational errors that may be caused by voltage abnormalities.

[0100] Start backup power supply: If the laser forming equipment has strict requirements on power continuity, an uninterruptible power supply system (UPS) or backup generator can be configured to automatically switch to these backup power supplies to maintain the operation of the laser forming equipment.

[0101] Real-time alarm system: When adverse external impacts are judged to be large, the system should send an alarm to the operator or maintenance team, providing real-time risk assessment and recommended response measures.

[0102] Data Logging and Analysis: Detailed data on relevant events and laser forming equipment responses is recorded for subsequent analysis to identify the root cause of the problem and optimize the system design.

[0103] Power regulation: The power output of the laser forming equipment is controlled by software and dynamically adjusted according to grid conditions to reduce the impact on the grid and improve the overall stability of the system.

[0104] Load balancing: In a multi-laser forming equipment environment, a load management strategy can be implemented to balance the overall impact on the power grid by adjusting the operating time and load intensity of the laser forming equipment.

[0105] When the adverse external influence is small, the deviation degree of the laser beam forming process within the preset interval is evaluated, and the deviation degree of the laser beam forming process within the preset interval is divided into large or small through threshold comparison, specifically:

[0106] Collect real-time data about laser power from laser shaping equipment. Real-time data about laser power is usually achieved through power sensors embedded in the laser shaping equipment. These sensors can provide accurate power output readings.

[0107] Get at time point The actual measured power value.

[0108] Get at time point The set power value.

[0109] Calculate each time point The power deviation is expressed as: ;in, For time point The power deviation, At time points The actual measured power value and the The set power value.

[0110] Analyze the overall power deviation within the preset interval and calculate the power deviation index. The power deviation index is the power deviation index at a time point within the preset interval. The average value of the power deviation.

[0111] The larger the power deviation index is, the worse the laser power stability is.

[0112] The power deviation index threshold corresponding to the power deviation index is set. Specifically, it can be set according to the following method:

[0113] Product quality requirements: Based on the product's quality standards, set a deviation threshold that ensures the finished product meets the specifications.

[0114] Historical performance data: Analyze the historical operating data of the laser forming equipment, determine the relationship between power deviation and product quality, and set a practical and effective threshold based on this data.

[0115] Safety and efficiency considerations: Considering the safe operation and production efficiency of the laser forming equipment, a threshold is selected that is neither too sensitive nor too lenient.

[0116] Compare the power deviation degree index with the power deviation degree index threshold:

[0117] When the power deviation index is greater than the power deviation index threshold, the deviation of the laser beam forming process within the preset interval is determined to be large, which indicates that the deviation between the actual power and the set power of the laser forming equipment exceeds the acceptable range. This large deviation may cause the forming quality to not meet the standards, affecting product quality and the safety of the laser forming equipment; at this time, the following measures can be taken:

[0118] Control the power of the laser forming equipment to turn off;

[0119] Check and analyze the causes of power deviation, which may include laser forming equipment failure, power supply problems, or incorrect settings of the control system.

[0120] Based on the results of fault diagnosis, necessary laser forming equipment calibration or maintenance is performed to ensure that all systems are restored to normal working condition.

[0121] When the power deviation degree index is less than or equal to the power deviation degree index threshold, it is determined that the deviation degree of the laser beam forming process within the preset interval is small, which means that the power control of the laser forming equipment is within the expected accuracy, the laser forming equipment is temporarily operating normally, and the risk in the laser forming equipment forming process is small (but does not mean there is no risk).

[0122] In S4, when the degree of deviation of the laser beam forming process within the preset interval is small, the degree of deviation of the laser beam forming process caused by the power supply within the preset interval is evaluated, specifically:

[0123] Collect data related to laser forming equipment power parameters and laser output deviation (at each time point Power parameters include but are not limited to the following types of data:

[0124] Power supply voltage: records the input voltage changes during the laser forming process. The power supply voltage refers to the power supply voltage supplied to the laser forming equipment.

[0125] Power supply current: Synchronously record the current data corresponding to the voltage. The power supply current refers to the amount of current passing through the laser forming equipment in a specific time.

[0126] These data should be collected continuously at the same time intervals to ensure the accuracy and relevance of the analysis.

[0127] Proper processing of the collected data:

[0128] Data cleaning: Remove outliers and missing data to ensure the completeness and accuracy of the analysis.

[0129] Data synchronization: Ensure that all data points are aligned in time so that correlations can be accurately calculated.

[0130] The Pearson correlation coefficient is a statistical method to measure the strength and direction of the linear relationship between two variables. The power supply deviation index is calculated based on the correlation coefficient, and its expression is: ;in, is the power supply-induced deviation index, They are the power parameters and power deviation of a single sample point within the preset interval. are the average values ​​of power supply parameters and power deviation respectively, is the number of the sample point in the preset interval, Is a positive integer.

[0131] The larger the power supply deviation index is, the greater the influence of the power supply parameters on the laser power deviation is, that is, the greater the degree of deviation in the laser beam forming process caused by the power supply within the preset range is, which means that the fluctuation of the power supply parameters within the preset range has a greater impact on the laser power, thereby producing a significant negative effect on the laser forming process.

[0132] This approach enables quantification of the correlation between power supply parameters and laser beam deviation and conversion of the strength of this relationship into an easily interpretable index of power supply-induced deviation.

[0133] Analyze the response speed of the power supply to load changes and evaluate its ability to respond to load changes, specifically:

[0134] To fully evaluate the responsiveness of a power control system, that is, its ability to adjust the output to match the required power after detecting a load change, the following are the specific steps:

[0135] Obtain multiple load change processes closest to real time, and obtain the response speed of the laser forming equipment power supply corresponding to each load change process.

[0136] The load change process usually refers to the change in laser output demand, which may be caused by changing the processing material, changing the cutting or welding parameters such as laser power, speed, focal length, etc. For example, switching from low-power fine processing mode to high-power rough processing mode will cause a significant change in the power supply load.

[0137] The response speed of the laser forming equipment power supply is the time interval from detecting a change in load demand (such as an increase or decrease in laser output power) to the power supply output stabilizing to match the demand.

[0138] Among them, the method for obtaining the response speed of the laser forming equipment power supply is:

[0139] Use a real-time data acquisition system to record the power supply output parameters (such as voltage, current) and laser power settings. The system requires sensors and data loggers with high sampling rates to capture rapid changes.

[0140] Set the system to automatically record the time when a change in the laser power setting is detected and the time when the power output stabilizes.

[0141] The response speed of the laser forming equipment power supply is the time point when the power output is stable minus the time point automatically recorded by the system when a change in the laser power setting is detected.

[0142] If the response speed of the laser forming equipment power supply changes greatly over a period of time, it means that there may be technical problems in the power supply system, such as aging components, unstable power input or software problems in the control system. Changes in the external environment (such as temperature and humidity) may affect the performance of the power supply system.

[0143] Get the closest to real time The load change process is repeated, and the corresponding response speed of the laser forming equipment power supply is obtained. The response speed of the laser forming equipment power supply is analyzed and the power supply load response index is calculated, and its expression is: ;in, is the power supply load response index, is the number of load change processes obtained, is the number of the load change process obtained, , is a positive integer; Respectively The response speed of the laser forming equipment power supply corresponding to the load change process and the The response speed of the laser forming equipment power supply corresponding to the load change process.

[0144] The larger the power supply load response index, the worse the power supply's ability to respond to load changes. This means that the power supply system is slower to adjust its output to match the load demand, which may affect the performance and operating efficiency of downstream laser forming equipment.

[0145] In S5, the degree of influence of the load change of the laser forming equipment on the power grid, the degree of deviation of the laser beam forming process caused by the power supply within a preset interval, and the response capability of the power supply to the load change are comprehensively analyzed, and the power supply control is performed according to the comprehensive analysis results, specifically:

[0146] The load impact index, the power supply-induced deviation index and the power supply load response index are normalized, and after assigning preset proportional coefficients to the normalized load impact index, the power supply-induced deviation index and the power supply load response index, respectively, the power supply risk assessment coefficient is calculated.

[0147] The specific implementation method of calculating the power supply risk assessment coefficient is not specifically limited here. Any method that can assign preset proportional coefficients to the normalized load impact index, power supply deviation index and power supply load response index to obtain the power supply risk assessment coefficient is sufficient. In order to implement the technical solution of the present invention, the present invention provides a specific method for calculating the power supply risk assessment coefficient.

[0148] The expression of power supply risk assessment coefficient is: ;in, is the power supply risk assessment factor, are preset proportional coefficients of the load impact index, the power supply caused deviation index, and the power supply load response index, respectively, and Both are greater than 0.

[0149] The preset proportional coefficient is set as follows:

[0150] The sensitivity of different systems to power quality may vary greatly. For example, precision manufacturing laser forming equipment has very high requirements for power stability, so it may be necessary to give greater weight to the power supply-induced deviation index and the power supply load response index when evaluating. For systems that do not require such high power quality, the weight of the load impact index may be greater.

[0151] By analyzing historical data, it is possible to determine which power supply parameter changes are most frequently associated with system failures or performance degradation. The indices corresponding to these parameters should be given higher weights in the risk assessment coefficient calculation.

[0152] The risk management strategy of an enterprise or organization will also affect the setting of the proportionality factor. If a certain type of risk is considered to be a priority, the proportionality factor of the corresponding index should be set higher to ensure that this risk is given enough attention in the assessment.

[0153] Before actual application, by simulating and testing different proportional coefficient settings, the impact of different settings on system performance can be observed. This method can help find the best proportional coefficient setting to achieve the most effective risk control.

[0154] In a risk assessment model for a laser forming machine, we decide to assign the following proportionality factors based on system sensitivity and historical failure data:

[0155] The preset proportionality factor of the load impact index is 0.2;

[0156] Preset proportionality factor of power supply-induced deviation index: 0.5;

[0157] The preset scaling factor of the power supply load response index is 0.3.

[0158] From the expression, we can see that the larger the power risk assessment coefficient is, the more likely it is to reflect the following problems:

[0159] The increase in the power supply risk assessment factor may reflect problems with power supply stability. This includes voltage fluctuations, current instability, etc. These problems may cause unstable output power of the laser forming equipment, affecting the accuracy and repeatability of the operation.

[0160] A large power risk assessment factor may also mean that the power supply does not respond quickly enough to load changes. In precision manufacturing processes such as laser forming, a slow response can result in poor finished product quality, such as material burns or poor processing due to untimely power adjustments.

[0161] Power problems can cause the laser forming machine to be frequently adjusted or shut down, increasing wear and tear on the machine and raising maintenance costs. In the long run, this situation may also shorten the service life of the laser forming machine.

[0162] The power supply risk assessment threshold is set by professional and technical personnel in this field based on the size of the power supply risk assessment coefficient calculated above and other actual conditions such as the actual safety requirements for the power supply operation of the laser forming equipment, and will not be repeated here.

[0163] Compare the power risk assessment factor to the power risk assessment threshold:

[0164] When the power supply risk assessment coefficient is less than or equal to the power supply risk assessment threshold, a normal power supply operation signal is generated, which indicates that the performance of the power supply system is within an acceptable safety range, the power supply has good response capability to load changes, and the deviation caused by the power supply is under control, and the risk is low.

[0165] When the power risk assessment coefficient is less than or equal to the power risk assessment threshold, a power operation danger alarm signal is generated, indicating that there is a potential risk in the power system, which may be due to power instability, insufficient response capability or other power problems that affect the performance of the overall laser forming equipment. This situation requires immediate attention to prevent laser forming equipment failure or reduced production quality.

[0166] After the power supply operation danger alarm signal is generated, the measures taken include:

[0167] Urgent inspection and diagnosis: Immediately conduct a comprehensive inspection and diagnosis of the power system to determine the specific cause of the high risk assessment factor.

[0168] Sound an alarm: The system should automatically sound an alarm signal to notify maintenance personnel and management of possible problems with the power system.

[0169] Temporary measures: If necessary, temporarily switch to the backup power system or reduce the load on the laser forming equipment to reduce the immediate threat to production and laser forming equipment safety.

[0170] Troubleshooting: Based on diagnostic results, quickly resolve any identified power issues, which may include replacing damaged components, adjusting power configuration, or updating control system software.

[0171] System upgrades: Consider long-term upgrades or improvements to the power system to avoid similar risk situations in the future.

[0172] Example 2

[0173] The difference between Embodiment 2 of the present invention and Embodiment 1 is that this embodiment introduces a power supply control system.

[0174] Figure 2A structural schematic diagram of a power supply control system of the present invention is given, which includes an external impact analysis module, an external impact judgment module, an external alarm module, a laser deviation judgment module, a power supply analysis module, a load response evaluation module and a power supply comprehensive control module.

[0175] The external impact analysis module evaluates in real time the impact of load changes of the laser forming equipment on the power grid; and monitors the real-time fluctuation of the power grid voltage.

[0176] The external impact judgment module classifies the external adverse impact on the power supply stability of the laser forming equipment into large external adverse impact or small external adverse impact according to the degree of impact of the load change of the laser forming equipment on the power grid and the real-time fluctuation degree of the power grid voltage.

[0177] When the external risk level is high, the external alarm module sounds an alarm.

[0178] When the external adverse influence is small, the laser deviation judgment module evaluates the deviation degree of the laser beam forming process within the preset interval, and classifies the deviation degree of the laser beam forming process within the preset interval as large or small through threshold comparison.

[0179] When the deviation degree of the laser beam forming process within the preset interval is small, the power supply-induced analysis module evaluates the deviation degree of the laser beam forming process caused by the power supply within the preset interval.

[0180] The load response evaluation module analyzes the response speed of the power supply to load changes and evaluates the power supply's ability to respond to load changes.

[0181] The power integrated control module comprehensively analyzes the impact of the load change of the laser forming equipment on the power grid, the degree of deviation of the laser beam forming process caused by the power supply within a preset range, and the power supply's response capability to load changes, and performs power supply control based on the comprehensive analysis results.

[0182] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters and thresholds in the formula are set by technicians in this field according to actual conditions.

[0183] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage laser forming device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0184] Those of ordinary skill in the art will appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0185] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0186] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0187] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, and may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0188] In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.

[0189] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for enabling a computer laser forming device (which can be a personal computer, server, or network laser forming device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0190] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0191] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power control method, characterized in that: The steps include: S1: Real-time evaluation of the impact of load changes of laser forming equipment on the power grid; monitoring of real-time fluctuations in power grid voltage; S2: According to the degree of influence of the load change of the laser forming equipment on the power grid and the real-time fluctuation degree of the power grid voltage, the external adverse influence on the power supply stability of the laser forming equipment is divided into large external adverse influence or small external adverse influence; S3: When the external risk level is high, an alarm is sounded; when the external adverse impact is low, the deviation level of the laser beam forming process within a preset interval is evaluated, and the deviation level of the laser beam forming process within the preset interval is classified as large or small through threshold comparison; S4: when the deviation degree of the laser beam forming process within the preset interval is small, evaluating the degree of the deviation of the laser beam forming process caused by the power supply within the preset interval; analyzing the response speed of the power supply to the load change, and evaluating the response capability of the power supply to the load change; S5: comprehensively analyzing the influence of the load change of the laser forming equipment on the power grid, the degree of deviation of the laser beam forming process caused by the power supply within a preset interval, and the response capability of the power supply to the load change, and performing power supply control according to the comprehensive analysis results; In S3, when the adverse external influence is small, the deviation degree of the laser beam forming process within the preset interval is evaluated, and the deviation degree of the laser beam forming process within the preset interval is divided into large or small by threshold comparison, specifically: Collect real-time data on laser power from laser forming equipment; Get at time point The actual measured power value at the time point The set power value; Calculate each time point The power deviation is expressed as: ;in, For time point The power deviation, At time points The actual measured power value and the The set power value; Analyze the overall power deviation within the preset interval and calculate the power deviation index. The power deviation index is the power deviation index at a time point within the preset interval. The average value of the power deviation; A power deviation index threshold is set; the power deviation index is compared with the power deviation index threshold: When the power deviation index is greater than the power deviation index threshold, it is determined that the deviation of the laser beam forming process within the preset interval is large; When the power deviation index is less than or equal to the power deviation index threshold, it is determined that the deviation of the laser beam forming process within the preset interval is small; In S4, when the degree of deviation of the laser beam forming process within the preset interval is small, the degree of deviation of the laser beam forming process caused by the power supply within the preset interval is evaluated, specifically: Collect data related to laser forming equipment power supply parameters and laser output deviations; Clean and synchronize the collected data; The power supply-induced deviation index is calculated based on the correlation coefficient, and its expression is: ;in, is the power supply-induced deviation index, They are the power parameters and power deviation of a single sample point within the preset interval. are the average values ​​of power supply parameters and power deviation respectively, is the number of the sample point in the preset interval, is a positive integer; Analyze the response speed of the power supply to load changes and evaluate the power supply's ability to respond to load changes, specifically: Obtain multiple load change processes closest to real time, and obtain the response speed of the laser forming equipment power supply corresponding to each load change process; The response speed of the laser forming equipment power supply is the time interval from detecting a change in load demand to the time when the power supply output stably matches the demand; The change range of the response speed of the power supply of the multiple laser forming equipment closest to the real time is analyzed, and the power load response index is calculated, and its expression is: ;in, is the power supply load response index, is the number of load change processes obtained, is the number of the load change process obtained, , is a positive integer; Respectively The response speed of the laser forming equipment power supply corresponding to the load change process and the The response speed of the laser forming equipment power supply corresponding to the load change process.

2. A power control method according to claim 1, characterized in that: In S1, the impact of load changes of the laser forming equipment on the power grid is evaluated in real time, specifically: Obtain the rated complex power of the laser forming equipment; Obtaining the reference complex power of the power grid system; Get the reference impedance. The reference impedance formula is: ;in, is the reference impedance, is the reference voltage of the power grid system, is the reference complex power of the power grid system; Obtain the line impedance from the power supply to the laser forming equipment; Calculate the load impact index, the expression is: ;in, is the load impact index, is the rated complex power of the laser forming equipment, is the line impedance from the power supply to the laser forming equipment.

3. A power control method according to claim 2, characterized in that: Monitor the real-time fluctuation of the grid voltage, specifically: Calculate the voltage standard deviation within the voltage monitoring interval, and its expression is: ;in, is the voltage standard deviation within the voltage monitoring interval, It is the first The measured grid voltage value, is the average value of the grid voltage in the voltage monitoring interval, is the number of times the grid voltage is measured within the voltage monitoring interval, It is the number of the grid voltage value measured within the voltage monitoring interval. ,and Is a positive integer.

4. A power control method according to claim 3, characterized in that: In S2, according to the degree of influence of the load change of the laser forming equipment on the power grid and the real-time fluctuation degree of the power grid voltage, the external adverse influence on the power supply stability of the laser forming equipment is divided into large external adverse influence or small external adverse influence, specifically: Set the load impact index threshold corresponding to the load impact index; Set a voltage standard deviation threshold corresponding to the voltage standard deviation; When the load influence index is less than the load influence index threshold and the voltage standard deviation is less than the voltage standard deviation threshold, it is determined that the external adverse influence on the power supply stability of the laser forming equipment is small; otherwise, it is determined that the external adverse influence on the power supply stability of the laser forming equipment is large.

5. A power control method according to claim 4, characterized in that: In S5, the degree of influence of the load change of the laser forming equipment on the power grid, the degree of deviation of the laser beam forming process caused by the power supply within a preset interval, and the response capability of the power supply to the load change are comprehensively analyzed, and the power supply control is performed according to the comprehensive analysis results, specifically: The load impact index, the power supply-induced deviation index, and the power supply load response index are normalized, and after the normalized load impact index, the power supply-induced deviation index, and the power supply load response index are assigned preset proportional coefficients respectively, the power supply risk assessment coefficient is calculated; A power risk assessment threshold is set; and a power risk assessment coefficient is compared with the power risk assessment threshold: When the power risk assessment coefficient is less than or equal to the power risk assessment threshold, it is determined that a power supply normal operation signal is generated; When the power supply risk assessment coefficient is less than or equal to the power supply risk assessment threshold, it is determined that a power supply operation danger alarm signal is generated; After a power supply operation danger alarm signal is generated, measures taken include emergency inspection and diagnosis, alarm issuance, and fault repair.

6. A power control system, used to implement a power control method according to any one of claims 1 to 5, characterized in that: It includes an external impact analysis module, an external impact judgment module, an external alarm module, a laser deviation judgment module, a power supply analysis module, a load response evaluation module and a power supply comprehensive control module; The external impact analysis module evaluates in real time the impact of load changes of the laser forming equipment on the power grid; monitors the real-time fluctuation of the power grid voltage; The external impact judgment module classifies the external adverse impact on the power supply stability of the laser forming equipment into large external adverse impact or small external adverse impact according to the degree of impact of the load change of the laser forming equipment on the power grid and the real-time fluctuation degree of the power grid voltage; When the external risk level is high, the external alarm module sounds an alarm; When the adverse external influence is small, the laser deviation judgment module evaluates the deviation degree of the laser beam forming process within the preset interval, and classifies the deviation degree of the laser beam forming process within the preset interval as large or small through threshold comparison; When the degree of deviation of the laser beam forming process within the preset interval is small, the power supply-induced analysis module evaluates the degree of deviation of the laser beam forming process caused by the power supply within the preset interval; The load response evaluation module analyzes the response speed of the power supply to load changes and evaluates the power supply's ability to respond to load changes; The power integrated control module comprehensively analyzes the impact of the load change of the laser forming equipment on the power grid, the degree of deviation of the laser beam forming process caused by the power supply within a preset range, and the power supply's response capability to load changes, and performs power supply control based on the comprehensive analysis results.

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