A control method, system, intelligent terminal and storage medium for an overhead line connection device

Abstract

The present invention relates to the technical field related to lead conduction current control, and specifically includes a control method, system, intelligent terminal and storage medium for an overhead line connection device. The method includes: obtaining dynamic contact parameters of the overhead line connection point, triggering a contact pressure correction instruction through a fuzzy adaptive PID control unit, and adjusting the parameters of the clamping mechanism; at the same time, collecting environmental interference data, generating a compensation coefficient in combination with operating parameters, and continuously adjusting the collaborative action parameters until the contact stability verification is passed. It solves the technical problem that the uneven distribution of the contact pressure at the overhead line connection point caused by environmental interference factors affects the contact stability of the overhead line connection point, and realizes the technical effect of effectively improving the contact stability of the overhead line connection point by the fuzzy adaptive PID control unit to adjust the contact pressure correction instruction in real time, combined with the contact pressure compensation coefficient, and continuously adjusting the collaborative action parameters of the buffer mechanism and the clamping mechanism of the connection device.

Description

Technical Field

[0001] The present invention relates to the technical field related to lead conduction current control, and specifically relates to a control method, system, intelligent terminal and storage medium for an overhead line connection device. Background Art

[0002] As one of the ways of electric energy transmission, the stability and safety of overhead lines are crucial for the overall operation of the power system. However, during the operation of overhead lines, they will be affected by various external factors, such as changes in wind force levels, fluctuations in temperature gradients, and spectral characteristics of mechanical vibrations. Conventional control of connection devices often has difficulty effectively dealing with complex and variable environmental interference factors, which will not only affect the distribution of contact pressure and the stability of contact resistance, but may also cause micro-displacement offsets in the line, thereby affecting the overall operation performance of the line.

[0003] In summary, there is a technical problem in the prior art that environmental interference factors interfere with the uneven distribution of contact pressure at the overhead line connection point, affecting the contact stability of the overhead line connection point. Summary of the Invention

[0004] This application provides a control system for an overhead line connection device, aiming to solve the technical problem in the prior art that environmental interference factors interfere with the uneven distribution of contact pressure at the overhead line connection point, affecting the contact stability of the overhead line connection point.

[0005] In view of the above problems, the technical solution of this application is as follows:

[0006] In the first aspect, this application provides a control method for an overhead line connection device. The method includes: obtaining dynamic contact parameters of the overhead line connection point, where pressure-free terminals are arranged at the overhead line connection point, and the dynamic contact parameters include contact pressure distribution, contact resistance fluctuation value, and micro-displacement offset; based on the dynamic contact parameters, triggering a contact pressure correction instruction by a fuzzy adaptive PID control unit, and the contact pressure correction instruction is used to adjust the multi-axis hydraulic drive parameters of the clamping mechanism corresponding to the connection device; at the same time, collecting environmental interference data including wind force level, temperature gradient change rate, and mechanical vibration spectrum, and dynamically analyzing them in combination with the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point to generate a contact pressure compensation coefficient; according to the contact pressure correction instruction and the contact pressure compensation coefficient, continuously adjusting the coordinated action parameters of the buffer mechanism and the clamping mechanism of the connection device until the overhead line connection point passes the contact stability check.

[0007] Second aspect, the present application provides a control system for an overhead line connection device. Among them, the system includes: a parameter acquisition module, which is used to acquire the dynamic contact parameters of the overhead line connection point. Among them, the overhead line connection point is provided with a pressure-free terminal, and the dynamic contact parameters include contact pressure distribution, contact resistance fluctuation value and micro-displacement offset; an instruction trigger module, which is used to trigger a contact pressure correction instruction based on the dynamic contact parameters by means of a fuzzy adaptive PID control unit. The contact pressure correction instruction is used to adjust the multi-axis hydraulic drive parameters of the clamping mechanism corresponding to the connection device; a data acquisition module, which is used to, at the same time, acquire environmental interference data including wind force level, temperature gradient change rate and mechanical vibration spectrum, and combine the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point for dynamic analysis to generate a contact pressure compensation coefficient; a stability verification module, which is used to continuously adjust the coordinated action parameters of the buffer mechanism and the clamping mechanism of the connection device according to the contact pressure correction instruction and the contact pressure compensation coefficient until the overhead line connection point passes the contact stability verification.

[0008] Third aspect, the present application provides an intelligent terminal, which includes: a processor; a memory for storing instructions executable by the processor; among them, the processor is used to execute a control method for an overhead line connection device provided by the present application.

[0009] Fourth aspect, the present application provides a computer-readable storage medium, in which the storage medium stores a computer program, and the computer program is used to execute a control method for an overhead line connection device provided by the present application.

[0010] In summary, one or more technical solutions provided in the present application achieve the technical effect of effectively improving the contact stability of the overhead line connection point by adjusting the contact pressure correction instruction in real time through a fuzzy adaptive PID control unit, combining the contact pressure compensation coefficient, and continuously adjusting the coordinated action parameters of the buffer mechanism and the clamping mechanism of the connection device. Description of the Drawings

[0011] Figure 1 It is a schematic flow chart of a control method for an overhead line connection device provided by the present application;

[0012] Figure 2 It is a schematic structural diagram of a control system for an overhead line connection device provided by the present application;

[0013] Figure 3 It is a schematic structural diagram of an intelligent terminal provided by the present application.

[0014] Description of reference numerals: Parameter acquisition module M100, instruction trigger module M200, data acquisition module M300, stability verification module M400, processor 21, memory 22, input device 23, output device 24. Detailed implementation manners

[0015] Embodiment 1

[0016] The present application will be specifically described below with reference to the accompanying drawings. As Figure 1 shown, the present application provides a control method for an overhead line connection device, wherein the method includes:

[0017] S1: Obtain the dynamic contact parameters of the overhead line connection point. Among them, a pressure-free terminal is arranged at the overhead line connection point, and the dynamic contact parameters include contact pressure distribution, contact resistance fluctuation value, and micro-displacement offset.

[0018] Specifically, the dynamic contact parameters include contact pressure distribution, contact resistance fluctuation value, and micro-displacement offset. Among them, the contact pressure distribution describes the magnitude and distribution of the pressure received by each part of the overhead line connection point; the contact resistance fluctuation value reflects the instability of the contact resistance with changes in factors such as time and environment; the micro-displacement offset indicates the small position offset of the overhead line connection point under the interference of external factors; the pressure-free terminal does not require complex crimping operations, can quickly achieve electrical connection between overhead lines, and at the same time maintain good contact performance, providing basic electrical connection and mechanical support at the overhead line connection point, ensuring stable connection between overhead lines under normal operating conditions; obtaining the dynamic contact parameters of the overhead line connection point, and the dynamic contact parameters of the overhead line connection point are key indicators for evaluating the contact state of the overhead line connection point, providing data support for subsequent analysis.

[0019] S2: Based on the dynamic contact parameters, trigger a contact pressure correction instruction with a fuzzy adaptive PID control unit. The contact pressure correction instruction is used to adjust the multi-axis hydraulic drive parameters of the clamping mechanism corresponding to the connection device.

[0020] Specifically, the fuzzy adaptive PID control unit refers to an advanced control unit that combines fuzzy logic and PID control, and can automatically adjust the PID control parameters according to the input dynamic contact parameters to achieve precise control of the contact pressure; the contact pressure correction instruction is an instruction issued by the fuzzy adaptive PID control unit according to the dynamic contact parameters for adjusting the contact pressure. Through this instruction, the multi-axis hydraulic drive parameters of the clamping mechanism corresponding to the connection device can be adjusted, thereby changing the clamping force and state of the clamping mechanism on the overhead line to maintain stable contact at the overhead line connection point.

[0021] Input the dynamic contact parameters of the overhead line connection point into the fuzzy adaptive PID control unit. According to the preset fuzzy rules and PID control algorithm, this control unit analyzes and judges the contact pressure in real time, triggers the contact pressure correction instruction, and changes the clamping force of the clamping mechanism on the overhead line by adjusting the hydraulic drive parameters, so as to make the contact pressure distribution return to uniformity, reduce the fluctuation value of the contact resistance, and control the fluctuation of the micro-displacement offset, thereby improving the contact stability of the overhead line connection point and ensuring the stable operation of the overhead line in a complex environment.

[0022] S3: At the same time, collect the environmental interference data including the wind force level, the temperature gradient change rate, and the mechanical vibration spectrum, and conduct dynamic analysis in combination with the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point to generate a contact pressure compensation coefficient.

[0023] Specifically, collecting the environmental interference data including the wind force level, the temperature gradient change rate, and the mechanical vibration spectrum means using corresponding sensors to respectively obtain the wind force level, the temperature gradient change rate, and the mechanical vibration spectrum of the environment where the overhead line is located. The environmental interference data reflects the interference situation of the environment on the overhead line connection point; conducting dynamic analysis in combination with the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point means comprehensively analyzing the collected environmental interference data and the parameters (such as current, voltage, tension, etc.) during the operation of the two overhead lines bound to the overhead line connection point to evaluate the influence of environmental factors and operation parameters on the contact pressure; generating the contact pressure compensation coefficient is to determine a coefficient for compensating and adjusting the contact pressure according to the results of the dynamic analysis. The contact pressure compensation coefficient can reflect the comprehensive influence degree of the environment and operation parameters on the contact pressure.

[0024] Further continuously adjusting the coordinated action parameters of the buffer mechanism and the clamping mechanism of the connection device means continuously adjusting the coordinated working parameters (such as clamping force, buffer stroke, etc.) of the buffer mechanism (such as elastic elements, dampers, etc.) and the clamping mechanism (through multi-axis hydraulic drive) according to the contact pressure correction instruction and the contact pressure compensation coefficient to achieve the purpose of optimizing the contact pressure until the overhead line connection point passes the contact stability check, indicating that this adjustment process will continue until the contact of the overhead line connection point reaches a stable state through the contact stability check (such as monitoring whether the contact resistance is within the stable range, observing whether there is displacement exceeding the limit, etc.).

[0025] S4: According to the contact pressure correction instruction and the contact pressure compensation coefficient, continuously adjust the coordinated action parameters of the buffer mechanism and the clamping mechanism of the connection device until the overhead line connection point passes the contact stability check.

[0026] Specifically, environmental interference data is collected. For example, in the outdoor overhead line environment, the wind force level is measured by an anemometer, the temperature gradient change rate is measured by a temperature sensor, and data such as the main frequency and frequency band range of the mechanical vibration spectrum are obtained using a vibration sensor. At the same time, the first overhead line operation parameter and the second overhead line operation parameter are obtained; these data are substituted into a pre-established dynamic analysis model. This model is based on a large amount of experimental data and historical operation data, and through algorithm analysis, the influence relationship between environmental factors and operation parameters on the contact pressure is determined to obtain the contact pressure compensation coefficient. Then, according to the contact pressure correction instruction and the contact pressure compensation coefficient, the coordinated action parameters of the buffer mechanism and the clamping mechanism of the lead-in device are continuously adjusted; through continuous adjustment, the contact state of the overhead line connection point is monitored in real time. When the fluctuation value of the contact resistance and the fluctuation of the micro-displacement offset tend to be stable, and after passing the contact stability verification and meeting the stability standard, the adjustment process is completed, so that the overhead line connection point maintains good contact stability in a complex environment and improves the reliability of the overhead line operation.

[0027] Furthermore, a fuzzy adaptive PID control unit is constructed. The method of this application includes:

[0028] The input quantity of the fuzzy adaptive PID control unit is the normalized weighted sum of the standard deviation of the contact pressure distribution and the fluctuation value of the contact resistance;

[0029] The output layer of the fuzzy adaptive PID control unit adopts a dynamic gain adjustment strategy, and the proportional coefficient and the integral time constant are corrected in real time according to the change rate of the micro-displacement offset;

[0030] When it is detected that the fluctuation value of the contact resistance exceeds the preset fluctuation threshold, the differential preview control mode is activated to suppress overshoot, and the contact pressure correction instruction is generated.

[0031] Specifically, after normalizing the standard deviation of the contact pressure distribution (an index measuring the concentration or dispersion degree of the contact pressure distribution) and the fluctuation value of the contact resistance (scaling the data proportionally to a given range, usually from 0 to 1), they are added according to the weight to obtain a comprehensive input quantity, which is used to characterize the contact pressure state; the output layer of the fuzzy adaptive PID control unit adopting a dynamic gain adjustment strategy means that in the output part of the control unit, the gain is dynamically adjusted according to the change of the input quantity to change the strength of the control action. Among them, correcting the proportional coefficient and the integral time constant in real time according to the change rate of the micro-displacement offset means that according to the rate of change of the micro-displacement offset over time, the proportional coefficient (affecting the rapidity of the control system) and the integral time constant (affecting the ability of the control system to eliminate static deviation) in the PID control are corrected in real time to make the control more accurate.

[0032] When the detected contact resistance fluctuation value exceeds the preset fluctuation threshold, the differential preview control mode is activated to suppress overshoot, and the contact pressure correction instruction is generated, indicating that when the contact resistance fluctuation exceeds the set safety threshold, the differential preview control mode (a mode that takes control measures in advance by predicting the future error change trend) is started to suppress the system overshoot (prevent the controlled quantity from exceeding the target value too much), and a correction instruction for adjusting the contact pressure is generated. The differential preview control mode increases the control force in advance, enables the contact pressure correction instruction to respond quickly, adjusts the hydraulic drive pressure of the clamping mechanism, reduces the overshoot amount, thereby ensuring that the contact pressure is stable within the target range and improving the contact stability of the overhead line connection point.

[0033] Furthermore, by combining the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point for dynamic analysis, a contact pressure compensation coefficient is generated. The method of this application includes:

[0034] Based on the first overhead line operation parameters and the second overhead line operation parameters, a coupling influence matrix is constructed and correlated with the environmental interference data to determine the correlation influence weights of each factor on the contact pressure;

[0035] Multiply the correlation influence weight by the compensation coefficient reference to obtain the contact pressure compensation coefficient.

[0036] Specifically, by using the method of mathematical modeling, the operation parameters of the first overhead line and the second overhead line (such as current, voltage, tension, temperature, etc.) are combined to form a coupling influence matrix, which can reflect the mutual influence relationship between the operating states of the two overhead lines; and the correlation analysis with the environmental interference data means combining the previously collected environmental interference data such as wind force level, temperature gradient change rate, and mechanical vibration spectrum with the coupling influence matrix, and through data mining, finding out the comprehensive influence law of environmental factors and overhead line operation parameters on the contact pressure; determining the correlation influence weights of each factor on the contact pressure means quantifying the degree of influence of each factor (including overhead line operation parameters and environmental interference factors) on the contact pressure, expressed in the form of a weight value, and the larger the weight, the more significant the influence of the factor on the contact pressure; multiplying the correlation influence weight by the compensation coefficient reference to obtain the contact pressure compensation coefficient means, based on the pre-set compensation coefficient reference, adjusting it according to the correlation influence weights of each factor to determine the contact pressure compensation coefficient that can reflect the comprehensive influence of all relevant factors. The compensation coefficient will be used for subsequent adjustment of the coordinated action parameters of the buffer mechanism and the clamping mechanism of the connection device to ensure that the overhead line connection point can still maintain good contact stability under the influence of various factors, and effectively improve the reliability and safety of the overhead line in a complex operating environment.

[0037] Furthermore, based on the operating parameters of the first overhead line and the second overhead line, a coupling influence matrix is constructed. The method of this application includes:

[0038] Introduce the wind force level and mechanical vibration spectrum to determine the predicted galloping mode of the overhead line;

[0039] Based on the temperature gradient change rate, determine the first dynamic compensation amount associated with the operating parameters of the first overhead line and the second dynamic compensation amount associated with the operating parameters of the second overhead line under the thermal expansion coefficient of the connection point;

[0040] Based on the predicted galloping mode of the overhead line, use the first dynamic compensation amount and the second dynamic compensation amount to set the coupling influence matrix of environmental interference on the contact pressure.

[0041] Specifically, introducing the wind force level and mechanical vibration spectrum to determine the predicted galloping mode of the overhead line means that according to the obtained wind force level and mechanical vibration spectrum data, through mathematical modeling and physical analysis, predict the galloping mode of the overhead line in the current environment, including characteristics such as the amplitude, frequency, and direction of galloping. This helps to understand the movement state of the overhead line under environmental interference; based on the temperature gradient change rate, determining the first dynamic compensation amount associated with the operating parameters of the first overhead line and the second dynamic compensation amount associated with the operating parameters of the second overhead line under the thermal expansion coefficient of the connection point means considering the influence of the temperature gradient change rate on the thermal expansion of the overhead line connection point, and respectively determining the amounts of dynamic compensation required for the operating parameters of the first overhead line and the second overhead line due to thermal expansion to offset the influence of dimensional changes caused by temperature changes on the contact pressure.

[0042] Based on the predicted galloping mode of the overhead line, using the first dynamic compensation amount and the second dynamic compensation amount to set the coupling influence matrix of environmental interference on the contact pressure is to comprehensively consider the galloping mode of the overhead line and the dynamic compensation amount caused by thermal expansion, and establish a matrix reflecting the comprehensive influence of environmental interference factors (wind force, vibration, temperature, etc.) on the contact pressure, which is used for subsequent precise analysis and compensation of the contact pressure; according to the thermal expansion formula ΔL = α × L0 × ΔT (ΔL is the length change amount, α is the thermal expansion coefficient, L0 is the original length, and ΔT is the temperature change amount), combined with the temperature gradient change rate and the temperature rise caused by the operating current, obtain the first dynamic compensation amount corresponding to the first overhead line and the second dynamic compensation amount corresponding to the second overhead line. Then, based on the predicted galloping mode of the overhead line, considering the influence of the galloping amplitude and frequency on the contact pressure, as well as the adjustment effect of the dynamic compensation amount on the contact pressure, set the coupling influence matrix of environmental interference on the contact pressure, so as to achieve precise compensation of the contact pressure and improve the contact stability and reliability of the overhead line connection point in a complex environment.

[0043] Furthermore, the method of this application also includes:

[0044] Dynamically match the elastic damping coefficient of the buffer mechanism of the connection device according to the adjustment range of the multi-axis hydraulic drive parameters of the clamping mechanism;

[0045] Meanwhile, when it is detected that the main frequency of the mechanical vibration spectrum coincides with the natural frequency of the clamping mechanism of the connection device, trigger the amplitude limiting mechanism of the contact pressure compensation coefficient.

[0046] Specifically, dynamically matching the elastic damping coefficient of the buffer mechanism of the connection device according to the adjustment range of the multi-axis hydraulic drive parameters of the clamping mechanism means that based on the change degree of the multi-axis hydraulic drive parameters (such as pressure, flow rate, speed, etc.) of the clamping mechanism, through real-time calculation and adjustment, the elastic damping coefficient of the buffer mechanism (usually including components such as springs and shock absorbers) is matched with it to achieve the coordinated work between the buffer mechanism and the clamping mechanism, so as to better cope with the dynamic changes of the overhead line connection point. When the connection device is affected by external interference at the overhead line connection point, the buffer mechanism can better absorb and reduce vibration shocks, and at the same time the clamping mechanism can maintain a stable clamping force to ensure the stability of the contact pressure.

[0047] Meanwhile, when it is detected that the main frequency of the mechanical vibration spectrum coincides with the natural frequency of the clamping mechanism of the connection device, triggering the amplitude limiting mechanism of the contact pressure compensation coefficient means that when it is found through vibration monitoring equipment that the main frequency in the mechanical vibration spectrum is the same as the natural frequency of the clamping mechanism of the connection device (the frequency that naturally occurs when the object vibrates), in order to avoid the excessive influence of the resonance phenomenon (at this time the vibration will be amplified sharply and may damage the equipment) on the contact pressure, start the amplitude limiting mechanism of the contact pressure compensation coefficient to limit the amplitude of the contact pressure compensation coefficient, prevent it from exceeding the reasonable range, and ensure the stability of the contact pressure; by limiting the amplitude, avoid large fluctuations in the contact pressure caused by resonance, thereby maintaining the contact stability of the overhead line connection point and improving the reliability and safety of the connection device in a complex vibration environment.

[0048] Furthermore, the method of this application further includes:

[0049] Based on the change gradient of the contact pressure compensation coefficient, optimize the timing synchronization of the actuation phase of the clamping mechanism and the response delay of the buffer mechanism;

[0050] When the wind force level in the environmental interference data reaches the wind force level safety threshold, perform multi-level pre-tightening force adaptive allocation with the buffer mechanism of the connection device.

[0051] Specifically, based on the change gradient of the contact pressure compensation coefficient, the timing synchronization optimization of the actuation phase of the clamping mechanism and the response delay of the buffer mechanism means adjusting the actuation timing (actuation phase) of the clamping mechanism (the device responsible for clamping or loosening the overhead line) and the response time delay of the buffer mechanism (the device that provides shock absorption and buffering) according to the rate and direction of the change of the contact pressure compensation coefficient, so that the two can cooperate better in time, ensuring that the action of the clamping mechanism and the buffering effect of the buffer mechanism can be exerted synchronously, thereby improving the contact stability of the overhead line connection point.

[0052] When the wind force level in the environmental interference data reaches the wind force level safety threshold, the multi-stage pre-tightening force adaptive distribution by the buffer mechanism of the lead-in device means that when the monitored wind force level exceeds the pre-set safety threshold, through the buffer mechanism of the lead-in device, different levels of pre-tightening forces are automatically distributed according to the magnitude and change of the wind force, so as to enhance the buffering effect, enhance the buffering protection of the overhead line connection point, prevent large fluctuations in contact pressure caused by strong winds, resist the influence of strong winds on the overhead line connection point, and thus effectively improve the contact stability and operation reliability of the overhead line in a strong wind environment.

[0053] Furthermore, the method of the present application further includes:

[0054] Based on the multi-axis hydraulic drive parameters of the clamping mechanism, determine the frictional resistance and leakage of the hydraulic cylinder component, where the hydraulic cylinder component is the driving part of the clamping mechanism;

[0055] According to the frictional resistance and leakage, determine the hydraulic operation conversion efficiency;

[0056] The hydraulic cylinder component acts on the overhead line connection point to perform the lead-in clamping action, and when the hydraulic operation conversion efficiency drops by more than the preset efficiency conversion threshold, a fault reminder is triggered.

[0057] Specifically, based on the multi-axis hydraulic drive parameters of the clamping mechanism, determining the frictional resistance and leakage of the hydraulic cylinder component means calculating the frictional resistance (mainly generated by the friction between the cylinder wall and the piston) and leakage (the leakage of hydraulic oil in the cylinder gap) inside the hydraulic cylinder by analyzing the operating parameters (such as pressure, flow rate, piston speed, etc.) of the multi-axis hydraulic drive of the clamping mechanism and using the principles of fluid mechanics and tribology; the statement that the hydraulic cylinder component is the driving part of the clamping mechanism indicates that the hydraulic cylinder is the core power element that drives the clamping mechanism to perform the clamping action. According to the frictional resistance and leakage, determining the hydraulic operation conversion efficiency is by comparing the theoretical hydraulic output power (based on the ideal situation of no friction and no leakage) with the actual hydraulic output power (the power considering friction and leakage), and determining the efficiency of the hydraulic system in converting hydraulic energy into mechanical energy.

[0058] The action of the hydraulic cylinder component on the overhead line connection point to perform the connection clamping action means that the hydraulic cylinder drives the clamping mechanism to clamp or release the overhead line connection point through the telescopic movement of the piston. When the conversion efficiency of the hydraulic operation drops by more than the preset efficiency conversion threshold, a fault reminder is triggered, which means that when the conversion efficiency of the hydraulic operation is lower than the set safety threshold, it indicates that there may be a fault and timely inspection and maintenance are required; by monitoring the conversion efficiency of the hydraulic operation, potential faults in the hydraulic cylinder component can be detected in a timely manner. For example, an abnormal increase in frictional resistance may indicate cylinder wear or poor lubrication, and an increase in leakage may mean seal damage, so that maintenance measures can be taken in a timely manner to avoid unstable contact at the overhead line connection point due to hydraulic system faults and ensure the continuous safe operation of the overhead line.

[0059] In summary, the beneficial effects of the embodiments of the present application are as follows:

[0060] By adopting the method of obtaining the dynamic contact parameters of the overhead line connection point, wherein the overhead line connection point is provided with a non-pressurized terminal, a contact pressure correction instruction is triggered by a fuzzy adaptive PID control unit, and the contact pressure correction instruction is used to adjust the multi-axis hydraulic drive parameters of the clamping mechanism corresponding to the connection device; at the same time, environmental interference data including wind force level, temperature gradient change rate and mechanical vibration spectrum are collected, and dynamic analysis is carried out in combination with the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point to generate a contact pressure compensation coefficient; according to the contact pressure correction instruction and the contact pressure compensation coefficient, the coordinated action parameters of the buffer mechanism and the clamping mechanism of the connection device are continuously adjusted until the overhead line connection point passes the contact stability check. The present application provides a control method, system, intelligent terminal and storage medium for an overhead line connection device. By using a fuzzy adaptive PID control unit to adjust the contact pressure correction instruction in real time and combining the contact pressure compensation coefficient, the coordinated action parameters of the buffer mechanism and the clamping mechanism of the connection device are continuously adjusted, effectively improving the technical effect of the contact stability of the overhead line connection point.

[0061] Embodiment 2

[0062] Based on the same inventive concept as the control method for an overhead line connection device in the foregoing embodiment, as Figure 2 shown, the embodiment of the present application provides a control system for an overhead line connection device, wherein the system includes:

[0063] A parameter acquisition module M100, which is used to acquire the dynamic contact parameters of the overhead line connection point. Among them, the overhead line connection point is provided with a non-pressurized terminal, and the dynamic contact parameters include contact pressure distribution, contact resistance fluctuation value and micro-displacement offset.

[0064] Instruction trigger module M200, which is used to trigger a contact pressure correction instruction based on the dynamic contact parameters by means of a fuzzy adaptive PID control unit, and the contact pressure correction instruction is used to adjust the multi-axis hydraulic drive parameters of the clamping mechanism corresponding to the connection device.

[0065] Data acquisition module M300, which is used to simultaneously collect environmental interference data including wind force level, temperature gradient change rate and mechanical vibration spectrum, and conduct dynamic analysis in combination with the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point to generate a contact pressure compensation coefficient.

[0066] Stability verification module M400, which is used to continuously adjust the coordinated action parameters of the buffer mechanism and the clamping mechanism of the connection device according to the contact pressure correction instruction and the contact pressure compensation coefficient until the overhead line connection point passes the contact stability verification.

[0067] Furthermore, a fuzzy adaptive PID control unit is constructed, and the instruction trigger module M200 is used to execute the following method:

[0068] The input of the fuzzy adaptive PID control unit is the normalized weighted sum of the standard deviation of the contact pressure distribution and the fluctuation value of the contact resistance; the output layer of the fuzzy adaptive PID control unit adopts a dynamic gain adjustment strategy to continuously correct the proportional coefficient and the integral time constant according to the change rate of the micro-displacement offset; when it is detected that the fluctuation value of the contact resistance exceeds the preset fluctuation threshold, the differential preview control mode is activated to suppress overshoot and generate the contact pressure correction instruction.

[0069] Furthermore, in combination with the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point for dynamic analysis to generate a contact pressure compensation coefficient, the data acquisition module M300 is used to execute the following method:

[0070] Based on the first overhead line operation parameters and the second overhead line operation parameters, a coupling influence matrix is constructed and correlated with the environmental interference data to determine the correlation influence weights of various factors on the contact pressure; the correlation influence weights are multiplied by the compensation coefficient reference to obtain the contact pressure compensation coefficient.

[0071] Furthermore, the data acquisition module M300 is also used to execute the following method:

[0072] Introduce the wind force level and mechanical vibration spectrum to determine the predicted galloping mode of the overhead line; based on the temperature gradient change rate, determine the first dynamic compensation amount associated with the operating parameters of the first overhead line and the second dynamic compensation amount associated with the operating parameters of the second overhead line under the thermal expansion coefficient of the connection point; based on the predicted galloping mode of the overhead line, use the first dynamic compensation amount and the second dynamic compensation amount to set the coupling influence matrix of environmental interference on the contact pressure.

[0073] Further, the data acquisition module M300 is further configured to execute the following method:

[0074] Dynamically match the elastic damping coefficient of the buffer mechanism of the connection device according to the adjustment range of the multi-axis hydraulic drive parameters of the clamping mechanism; at the same time, when it is detected that the main frequency of the mechanical vibration spectrum coincides with the natural frequency of the clamping mechanism of the connection device, trigger the amplitude limiting mechanism of the contact pressure compensation coefficient.

[0075] Further, the data acquisition module M300 is further configured to execute the following method:

[0076] Based on the change gradient of the contact pressure compensation coefficient, perform timing synchronization optimization on the actuation phase of the clamping mechanism and the response delay of the buffer mechanism; when the wind force level in the environmental interference data reaches the wind force level safety threshold, perform multi-stage pre-tightening force adaptive allocation with the buffer mechanism of the connection device.

[0077] Further, the data acquisition module M300 is further configured to execute the following method:

[0078] Based on the multi-axis hydraulic drive parameters of the clamping mechanism, determine the frictional resistance and leakage amount of the hydraulic cylinder component, where the hydraulic cylinder component is the driving component of the clamping mechanism; according to the frictional resistance and leakage amount, determine the hydraulic operation conversion efficiency; when the hydraulic cylinder component acts on the overhead line connection point to perform the connection clamping action, trigger a fault reminder when the hydraulic operation conversion efficiency drops by more than the preset efficiency conversion threshold.

[0079] Embodiment III

[0080] Figure 3 FIG. is a schematic structural diagram of an intelligent terminal provided in Embodiment III of the present invention, showing a block diagram of an exemplary intelligent terminal suitable for implementing the embodiments of the present invention. Figure 3 The displayed intelligent terminal is only an example and should not bring any restrictions to the functions and usage ranges of the embodiments of the present invention. As Figure 3 shown, the intelligent terminal includes a processor 21, a memory 22, an input device 23, and an output device 24; the number of processors 21 in the intelligent terminal can be one or more, Figure 3Taking a processor 21 as an example, the processor 21, the memory 22, the input device 23, and the output device 24 in the intelligent terminal can be connected through a bus or other means. Figure 3 Taking the connection through the bus as an example.

[0081] In the third embodiment, the memory 22, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to a control method for an overhead line connection device in this embodiment of the application. The processor 21 executes various functional applications and data processing of the computer device by running the software programs, instructions, and modules stored in the memory 22, that is, implements the above-mentioned control method for an overhead line connection device.

[0082] Any step of the above-mentioned method can be stored as a computer instruction or program in an unrestricted computer memory and can be called and recognized by an unrestricted computer processor to implement any method in this embodiment of the application, without further limitation here.

[0083] Furthermore, the first or second mentioned above does not only represent an order relationship but also represents a specific concept, and / or means that multiple elements can be selected individually or in whole. Obviously, those skilled in the art can make various changes and modifications to this application without departing from the scope of this application. Thus, if these modifications and variations of this application fall within the scope of this application and its equivalent technologies, this application is intended to include these changes and modifications.

[0084] In summary, any step can be stored as a computer instruction or program in an unrestricted computer memory and can be called and recognized by an unrestricted computer processor, without further limitation here.

[0085] Furthermore, the above technical solution only reflects the preferred technical solution of the technical solution in this embodiment of the application. Some changes that those skilled in the art may make to some parts thereof all reflect the principle of the novelty of this embodiment of the application. Obviously, those skilled in the art can make various changes and modifications to this application without departing from the scope of this application.

Claims

1. A control method for an overhead line connection device, characterized in that, The method includes: Obtaining dynamic contact parameters of the overhead line connection point, where a pressure-free terminal is arranged at the overhead line connection point, and the dynamic contact parameters include contact pressure distribution, contact resistance fluctuation value, and micro-displacement offset; Based on the dynamic contact parameters, triggering a contact pressure correction instruction by a fuzzy adaptive PID control unit, where the contact pressure correction instruction is used to adjust the multi-axis hydraulic drive parameters of the clamping mechanism corresponding to the lead-in device; Among them, constructing a fuzzy adaptive PID control unit includes: The input quantity of the fuzzy adaptive PID control unit is the normalized weighted sum of the standard deviation of the contact pressure distribution and the contact resistance fluctuation value; The output layer of the fuzzy adaptive PID control unit adopts a dynamic gain adjustment strategy to correct the proportional coefficient and integral time constant in real time according to the change rate of the micro-displacement offset; When it is detected that the contact resistance fluctuation value exceeds the preset fluctuation threshold, activate the differential preview control mode to suppress overshoot and generate the contact pressure correction instruction; At the same time, collect environmental interference data including wind force level, temperature gradient change rate, and mechanical vibration spectrum, and perform dynamic analysis in combination with the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point to generate a contact pressure compensation coefficient; According to the contact pressure correction instruction and the contact pressure compensation coefficient, continuously adjust the coordinated action parameters of the buffer mechanism and the clamping mechanism of the lead-in device until the overhead line connection point passes the contact stability check.

2. The control method of an overhead line connection device according to claim 1, characterized in that, Performing dynamic analysis in combination with the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point to generate a contact pressure compensation coefficient, including: Based on the first overhead line operation parameters and the second overhead line operation parameters, construct a coupling influence matrix, and perform correlation analysis with the environmental interference data to determine the correlation influence weights of each factor on the contact pressure; Multiply the correlation influence weight by the compensation coefficient reference to obtain the contact pressure compensation coefficient.

3. The control method of an overhead line connection device according to claim 2, characterized in that, Based on the first overhead line operation parameters and the second overhead line operation parameters, constructing a coupling influence matrix includes: Introduce the wind force level and the mechanical vibration spectrum to determine the predicted dancing mode of the overhead line; Based on the temperature gradient change rate, determine the first dynamic compensation amount associated with the first overhead line operation parameters and the second dynamic compensation amount associated with the second overhead line operation parameters under the thermal expansion coefficient of the connection point; Based on the predicted dancing mode of the overhead line, use the first dynamic compensation amount and the second dynamic compensation amount to set the coupling influence matrix of environmental interference on the contact pressure.

4. The control method of an overhead line connection device according to claim 2, characterized in that, Dynamically match the elastic damping coefficient of the buffer mechanism of the lead-in device according to the adjustment amplitude of the multi-axis hydraulic drive parameters of the clamping mechanism; At the same time, when it is detected that the main frequency of the mechanical vibration spectrum coincides with the natural frequency of the clamping mechanism of the lead-in device, trigger the amplitude limiting mechanism of the contact pressure compensation coefficient.

5. The control method of an overhead line connection device according to claim 4, characterized in that, Based on the change gradient of the contact pressure compensation coefficient, perform timing synchronization optimization on the actuation phase of the clamping mechanism and the response delay of the buffer mechanism; When the wind force level in the environmental interference data reaches the wind force level safety threshold, perform multi-level pre-tightening force adaptive allocation with the buffer mechanism of the lead-in device.

6. The control method of an overhead line connection device according to claim 5, characterized in that, Determine the frictional resistance and leakage of the hydraulic cylinder component based on the multi-axis hydraulic drive parameters of the clamping mechanism, where the hydraulic cylinder component is the drive component of the clamping mechanism; Determine the hydraulic operation conversion efficiency according to the frictional resistance and leakage; The hydraulic cylinder component acts on the overhead line connection point to perform the connection clamping action, and when the hydraulic operation conversion efficiency drops by more than the preset efficiency conversion threshold, a fault reminder is triggered.

7. An overhead line connection device control system, characterized in that, A control method for an overhead line connection device for implementing any one of claims 1-6, the system comprising: A parameter acquisition module for acquiring dynamic contact parameters of the overhead line connection point, wherein the overhead line connection point is provided with a non-pressurized terminal, and the dynamic contact parameters include contact pressure distribution, contact resistance fluctuation value and micro-displacement offset; An instruction trigger module for triggering a contact pressure correction instruction based on the dynamic contact parameters by means of a fuzzy adaptive PID control unit, the contact pressure correction instruction being used to adjust the multi-axis hydraulic drive parameters of the clamping mechanism corresponding to the connection device; Wherein, a fuzzy adaptive PID control unit is constructed, and the system is used to execute the following method: The input of the fuzzy adaptive PID control unit is the normalized weighted sum of the contact pressure distribution standard deviation and the contact resistance fluctuation value; The output layer of the fuzzy adaptive PID control unit adopts a dynamic gain adjustment strategy to continuously correct the proportional coefficient and integral time constant according to the change rate of the micro-displacement offset; When it is detected that the contact resistance fluctuation value exceeds the preset fluctuation threshold, a differential preview control mode is activated to suppress overshoot, and the contact pressure correction instruction is generated; A data acquisition module for simultaneously collecting environmental interference data including wind force level, temperature gradient change rate and mechanical vibration spectrum, and dynamically analyzing in combination with the first overhead line operation parameters and the second overhead line operation parameters bound to the overhead line connection point to generate a contact pressure compensation coefficient; A stability verification module for continuously adjusting the coordinated action parameters of the buffer mechanism and the clamping mechanism of the connection device according to the contact pressure correction instruction and the contact pressure compensation coefficient until the overhead line connection point passes the contact stability verification.

8. An intelligent terminal, characterized in that, The intelligent terminal includes: A processor and a memory for storing instructions executable by the processor; Wherein, the processor is used to execute a control method for an overhead line connection device according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, and the computer program is used to execute a control method for an overhead line connection device according to any one of claims 1 to 6.

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