Solar spectrum splitting combined heat and power system and operation method

Abstract

The application discloses a solar spectrum frequency division combined heat and power system and an operation method, and relates to the technical field of renewable energy sources, and comprises the following steps: S001, a coupling analysis baseline between irradiation parameters, heat distribution and optical characteristics is established, real-time temperature data and beam wavefront information of a spectrum frequency divider under sunlight conditions are collected, and an estimated atlas of refractive index gradient distribution is generated based on a thermal refractive index variation law. Through thermal, optical and force coupling control, the application realizes accurate prediction, real-time identification and dynamic correction of thermal lens effect, establishes a closed-loop feedback mechanism, guarantees stable alignment of photoelectric and photothermal paths, effectively improves system energy efficiency and operation reliability, and overcomes the problems of deviation, energy efficiency reduction and component damage caused by thermal lens in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of renewable energy, in particular to a solar spectrum frequency division combined heat and power system and an operation method thereof. BACKGROUND

[0002] The solar spectrum frequency division combined heat and power operation refers to a running mode in the process of solar energy utilization, in which different wavelength ranges of sunlight are separated, the high-energy short-wave part (mainly visible light and part of near-infrared light) is used for photovoltaic power generation, and the low-energy long-wave part (mainly mid-infrared and far-infrared light) is used for driving a thermal energy device to realize the simultaneous output and efficient collaborative utilization of electric energy and thermal energy. This method realizes the directional shunting of solar radiation through a spectrum frequency division device (such as a multilayer film filter, a prism structure or a selective absorption coating), and dynamically adjusts the ratio of photoelectric and photothermal output according to the real-time irradiation conditions and system load state, thereby reducing the heat loss and energy waste of a single energy path while improving the overall energy conversion efficiency. It is widely used in solar buildings, micro-grid energy stations, off-grid independent energy systems and other scenarios, and is one of the key operation strategies for realizing multi-energy collaboration and intelligent energy management.

[0003] The prior art has the following disadvantages:

[0004] In the prior art, the spectrum frequency division device is mainly used to direct the flow of different waveband solar radiation energy to the photovoltaic power generation unit and the light-thermal conversion unit in the application of solar combined heat and power, so as to improve the overall energy utilization efficiency. However, under the condition of long-time high-energy focusing operation, the structure of the frequency divider used in the prior art usually does not fully consider the thermal stability of the internal materials under high-intensity irradiation, which is easy to form a temperature gradient field in the device, and then cause non-uniform changes in the local refractive index of the materials, forming an optical thermal lens effect. When the thermal lens phenomenon occurs, the originally collimated or directional projected light beam will have a focal point drift in space, causing the light of different wavebands to deviate from the predetermined receiving area, resulting in that the photovoltaic assembly cannot obtain sufficient visible light radiation, or the heat collecting device cannot effectively absorb the energy of the infrared waveband, and in severe cases, it will cause a sharp drop in the output efficiency of the light energy path. In addition, the light beam deviation may also disrupt the dynamic load balance between the photoelectric and photothermal paths, leading to energy distribution disorder, asynchronous electric and thermal output, overloading of energy storage equipment or failure of operation scheduling, further inducing unstable operation, response delay and even thermal damage of key components of the whole machine, and other safety risks.

[0005] The above information disclosed in the background section is only used to strengthen the understanding of the background of the present disclosure, and therefore it can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0006] The application aims to provide a solar spectrum frequency division combined heat and power system and an operation method to solve the problems in the background.

[0007] To achieve the above-mentioned purpose, the application provides the following technical scheme: a solar spectrum frequency division combined heat and power operation method, comprising the following steps:

[0008] S001, establishing a coupling analysis baseline between irradiation parameters, heat distribution and optical characteristics, collecting real-time temperature data and beam wavefront information of the spectrum frequency divider under sunlight conditions, and generating an estimated graph of refractive index gradient distribution based on the variation law of thermal refractive index;

[0009] S002, based on the estimated graph of refractive index gradient distribution, identifying the thermal lens sensitive factor causing the spot shift, extracting the corresponding spot shift threshold, film layer stress threshold and focusing tolerance, and establishing physical constraint conditions for judging the beam shift state;

[0010] S003, constructing a focal point shift discriminator according to the physical constraint conditions, inversely calculating the real-time focal point coordinates based on the beam wavefront information, calculating the corresponding energy flow density, and dividing the spot shift degree into a level label;

[0011] S004, dynamically adjusting the spectrum shunt path according to the spot shift level label, realizing spectrum reconstruction by adjusting the incident angle and the bandpass width, and driving the flexible micro-actuator to perform optical axis correction operation, so that the reconstructed beam is stably projected to the predetermined energy receiving area;

[0012] S005, feeding back the operation state after optical axis correction and spectrum shunt adjustment to the heat management system, applying liquid cooling flow pulse and switching phase change heat conduction channel based on the heat distribution of the energy receiving area, and adjusting the absorption rate of the frequency divider surface coating, to realize the cooperative closed-loop operation of optical path adjustment and heat management control;

[0013] S006, based on the energy output data of the cooperative closed-loop operation, evaluating the overall operation effect of the system, adaptively correcting the threshold of the thermal lens sensitive factor according to the evaluation result, and updating the parameters of the focal point shift discriminator, to realize dynamic optimization of the thermal lens suppression strategy.

[0014] Preferably, step S001 comprises:

[0015] A simulated sunlight irradiation environment with a wavelength output capacity of 300nm to 2500nm is constructed, and a quartz collimating lens and a parabolic mirror combination structure are used to focus the output beam, and the beam is projected to the surface of a multi-layer film spectrum frequency divider sample;

[0016] Under high-energy irradiation conditions, the real-time temperature data of the center region, edge region and film interlayer of the spectral frequency divider are collected by a thermistor combined with an infrared thermometer, and the data are transmitted to the upper platform at a frequency of 1 Hz;

[0017] The wavefront information of the light beam formed after passing through the spectral frequency divider is synchronously collected, the phase distortion of the outgoing light is recorded by a microlens array wavefront detection device, and the wavefront data and corresponding temperature data form a time-synchronized data pair;

[0018] According to the thermal refractive index change coefficient of each film layer material of the frequency divider, the refractive index change value at each spatial position is calculated combined with the temperature measurement data, a three-dimensional refractive index gradient distribution map is reconstructed, and the area with a gradient greater than The area with a gradient greater than 0.1% per millimeter is marked as a high-risk area, and the temperature sampling data of the corresponding area is extracted for heat accumulation feature analysis;

[0019] Preferably, step S002 comprises:

[0020] Based on the obtained refractive index gradient distribution map, the refractive index change value greater than 0.1% per millimeter is screened as a high-risk area, and the temperature sampling data of the corresponding area is extracted for heat accumulation feature analysis; Preferably, step S002 comprises:

[0021] In the above high-risk area, combined with the film layer structure of the spectral frequency divider, the equivalent internal stress change caused by temperature rise is measured, and the film layer stress threshold highly related to the spot shift is extracted, and the film layer stress threshold is set to 65MPa;

[0022] By measuring the energy distribution of the spot at different shift positions, it is determined that the shift exceeding 0.6mm will cause a significant decrease in energy reception, and accordingly the focusing tolerance is set to within 0.6mm;

[0023] Based on the spot shift threshold, the film layer stress threshold and the focusing tolerance, the physical constraint conditions for judging the beam shift state are established, and when any position simultaneously satisfies the above three physical conditions, it is judged that the position occurs thermal lens induced focal point drift.

[0024] Preferably, step S003 comprises:

[0025] Based on the established spot shift physical constraint condition, the microlens array type wavefront sensor is set on the main axis of the spectral frequency divider in the outgoing direction, the two-dimensional wavefront phase diagram of the outgoing light beam under sunlight irradiation conditions is collected, and the optical axis deviation is monitored at a frequency of 20 frames per second;

[0026] When the principal optical axis represented by the wavefront data deviates more than 0.2mm in the X or Y direction, the coordinates of the focal point in the X, Y and Z directions in the three-dimensional space are calculated according to the phase contour density in the wavefront diagram and the light path tracking relationship, and the spatial offset distance of the focal point from the reference position is obtained;

[0027] A receiving device composed of a high-stability liquid crystal temperature-sensitive film is arranged at the focal point position, and a two-dimensional thermal image of the focal point thermal area is measured by an infrared thermal imager. The focal point energy flux density distribution is obtained through gray scale inversion, and the focal point energy concentration degree is evaluated.

[0028] The focal point spatial offset distance and the energy flux density concentration degree are used as joint criteria. According to the extracted spot offset threshold, film layer stress threshold and focusing tolerance, the current spot offset state is divided into five levels, marked as level one to level five, which are used as the basis for subsequent spectral path dynamic adjustment and incident angle correction.

[0029] Preferably, step S004 comprises:

[0030] According to the determined spot offset level label, it is judged whether to trigger the spectral path adjustment operation. If the offset level is one, no adjustment is performed. If the offset level is two, the incident angle fine adjustment operation is performed. If the offset level is three or above, the incident angle adjustment, band width adjustment and optical axis correction operations are simultaneously performed.

[0031] By adjusting the inclination angles of the mirrors in the X and Y directions through the piezoelectric ceramic driven tiltable mirror assembly, the reflection angles are controlled within ±3°, the main incident angle of the light beam to the spectral frequency divider is changed, and the separated light beams are re-aligned to the target energy receiving area.

[0032] The thickness of the interference filter film layer is adjusted by the piezoelectric micro-push driver, the bandpass center wavelength is adjusted within ±50nm, the bandwidth is compressed to 25nm or 20nm, and the concentration and receiving efficiency of the spectral energy are improved.

[0033] By the piezoelectric ceramic sheet driving unit on the flexible hinge platform, the light axis is micro-displaced in the X and Y directions, so that the light beam is kept perpendicular to the target receiving surface. The landing point offset of the corrected light beam is controlled within ±0.2mm, and the energy is stably transmitted to the photovoltaic or photothermal unit.

[0034] Preferably, step S005 comprises:

[0035] After the optical axis correction and spectral flow path adjustment operations are completed, based on the heat redistribution on the receiving surface, the thermocouple array and infrared thermal imaging equipment arranged behind the photovoltaic module and heat absorbing surface are used to collect the two-dimensional temperature distribution map of the heat surface, and it is judged whether there is a heat concentration state with a central temperature higher than 50℃ and a peripheral temperature lower than 30℃.

[0036] When the heat concentration state is determined to be true, the liquid cooling plate structure is controlled to apply a transient strong cooling flow pulse, which instantaneously increases the flow rate from 300 mL / min to 450 mL / min, and the pulse duration is 5 seconds, to quickly diffuse the local heat and reduce the temperature rise amplitude of the central overheating area;

[0037] After the liquid cooling pulse operation is completed, the heat conduction path of the paraffin and indium tin phase change heat conduction structure is controlled according to the temperature difference of different regions of the heat surface. When the temperature of the heat surface is between 45°C and 55°C, the paraffin heat conduction path is activated, and when the temperature approaches 80°C, the indium tin heat conduction path is activated, realizing balanced conduction and release of deep heat;

[0038] According to the focal point offset level and the heat distribution characteristics, the absorption performance of the multilayer absorption film composed of chromium oxide black and silicon nitride deposited on the surface of the spectral frequency divider is adjusted, and the surface temperature is fine-tuned to within ±5°C by a graphite heating sheet, so that the absorption rate in the mid-infrared and far-infrared wave bands is increased by no more than 2%, to enhance the energy absorption stability and alleviate the photothermal fluctuations under high offset levels.

[0039] Preferably, step S006 comprises:

[0040] After completing the optical axis correction and thermal management closed-loop operation, the direct current voltage, current, output power and power fluctuation amplitude of the photovoltaic array in the current complete operation cycle, and the inlet temperature, outlet temperature, volume flow rate and heat exchange efficiency data of the heat medium at the heat energy absorption end are collected, and it is determined whether there is a situation that the total energy decreases by more than 10%, the output is out of synchronization, or the power fluctuation is intensified compared with the previous cycle;

[0041] If it is determined that there is an abnormality, based on the focal point offset speed, the spot area change rate, the film layer thermal stress growth rate, the local refractive index gradient change amount and the receiving area temperature gradient amplitude of the current cycle, combined with the energy loss ratio, the threshold values of the sensitive factors are adjusted by no more than ±15% in proportion;

[0042] The corrected sensitive factor threshold values are used to update the focal point offset discriminator parameter set, including adjusting the spot area expansion rate set value to 1.4 mm² / min, adjusting the film layer stress growth critical value to 9.2 MPa / min, and adjusting the thermal spot area temperature gradient warning value to 14°C / cm, and verifying through a simulation sequence whether the new parameters can trigger the correction instruction in advance before the offset reaches the 70% critical value;

[0043] The updated parameters are packaged as the current running version, and the synchronization rate of light and heat output, the focus drift response time, the focus return speed and the energy loss change in the subsequent two running periods are monitored, if the energy efficiency improvement is not less than 8% and the misjudgment rate does not exceed 5%, it is confirmed that the parameter update is effective, and is continued to be used in the subsequent control strategy.

[0044] A solar spectrum frequency division combined heat and power system comprises a coupling modeling analysis module, an offset criterion extraction module, a focal point offset discrimination module, a dynamic spectrum adjustment module, a collaborative closed-loop control module and a strategy optimization evaluation module:

[0045] The coupling modeling analysis module establishes a coupling analysis baseline between irradiation parameters, heat distribution and optical characteristics, collects real-time temperature data and beam wavefront information of the spectrum frequency divider under sunlight conditions, and generates an estimated graph of refractive index gradient distribution based on the variation law of thermal refractive index;

[0046] The offset criterion extraction module identifies the thermal lens sensitive factor causing the light spot offset based on the estimated graph of refractive index gradient distribution, extracts the corresponding light spot offset threshold, film stress threshold and focusing tolerance, and establishes physical constraint conditions for judging the light beam offset state;

[0047] The focal point offset discrimination module constructs a focal point offset discriminator according to the physical constraint conditions, inverses real-time focal point coordinates based on the beam wavefront information, calculates the corresponding energy flow density, and divides the light spot offset degree into a level label;

[0048] The dynamic spectrum adjustment module dynamically adjusts the spectrum shunt path according to the light spot offset level label, realizes spectrum reconstruction by adjusting the incident angle and the bandpass width, simultaneously drives the flexible micro-actuator to perform optical axis correction operation, and makes the reconstructed light beam stably project to the predetermined energy receiving area;

[0049] The collaborative closed-loop control module feeds back the running state after the optical axis correction and spectrum shunt adjustment to the heat management system, applies liquid cooling flow pulses and switches the phase change heat conduction channel based on the heat distribution of the energy receiving area, and adjusts the absorption rate of the frequency divider surface coating, to realize the collaborative closed-loop operation of optical path adjustment and heat management control;

[0050] The strategy optimization evaluation module evaluates the overall system operation effect based on the energy output data of the collaborative closed-loop operation, adaptively corrects the threshold value of the thermal lens sensitive factor according to the evaluation result, and updates the parameters of the focal point offset discriminator, to realize dynamic optimization of the thermal lens suppression strategy.

[0051] In the above technical solution, the technical effects and advantages provided by the present application are:

[0052] The application realizes accurate prediction of the thermal lens formation mechanism by establishing the coupling relationship of the beam wavefront, temperature distribution and refractive index change; and ensures real-time identification and classification of the focal point drift state through the construction of a thermal sensitive factor extraction and offset level discriminator; and then dynamically corrects the beam offset by combining the spectral path reconstruction, incident angle adjustment and flexible optical axis calibration means, maintains the alignment accuracy of the photoelectric and photothermal paths; at the same time, the adjustment result is fed back to the heat management operation, and the cooling flow control, heat conduction path switching and surface coating adjustment are combined to realize the cooperative stability of the photothermal path; finally, under the closed-loop evaluation mechanism, the parameters are continuously updated adaptively, and the continuous optimization and self-evolution control of the thermal lens suppression strategy are realized. The overall scheme runs through the cooperative control path of the three-dimensional physical fields of heat, light and force, forms a closed loop from source identification, path correction to end feedback, effectively guarantees the energy acquisition stability and output power consistency of the photovoltaic unit and the heat collecting device in long-term operation, and overcomes the problems of energy efficiency fluctuation, load imbalance and device damage caused by the out-of-control thermal lens in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0054] Figure 1 The method flowchart of the solar spectrum frequency division combined heat and power operation method of the present application.

[0055] Figure 2 The module schematic diagram of the solar spectrum frequency division combined heat and power system of the present application. DETAILED DESCRIPTION

[0056] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these example implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art.

[0057] The present application provides a solar spectrum frequency division combined heat and power operation method as shown in Figure 1 The present application provides a solar spectrum frequency division combined heat and power operation method as shown in

[0058] S001, a coupling analysis baseline between irradiation parameters, heat distribution and optical characteristics is established, real-time temperature data and beam wavefront information of the spectrum frequency divider under sunlight conditions are collected, and a predicted atlas of refractive index gradient distribution is generated based on the thermal refractive index change rule;

[0059] In order to realize the quantitative analysis and prediction of the thermal-optical behavior of the solar spectrum splitting device, a coupling analysis baseline between the irradiation parameters, heat distribution and optical characteristics is constructed to generate the estimated gradient distribution of the refractive index. The method includes the following steps:

[0060] A simulation of the full spectrum of solar irradiation environment is constructed and the spectrum splitter is irradiated to obtain its real temperature response under working conditions. Specifically, a xenon lamp solar simulator with a wavelength range of 300 nm to 2500 nm is selected as a stable spectral irradiation source, and a combination of a quartz collimating lens and a coated parabolic reflector is used to focus the output light beam onto the test sample. The test sample is a multilayer film spectrum splitter with 12 layers of structure, which includes high refractive index material titanium dioxide, low refractive index material silicon dioxide and zirconium oxide with medium thermal conductivity. Each layer of film has a thickness controlled within ±5 nm, and the total film thickness is about 2 μm, which is deposited on an optical grade fused quartz substrate. In order to collect the temperature response of the spectrum splitter under high power density irradiation, a combination of thermistor and non-contact infrared thermometer is installed on the surface center, edge and internal layer structure of the spectrum splitter. The infrared thermometer is selected to have a temperature range of 0°C to 300°C, a response time of less than 20 ms and a high sensitivity type to ensure that the temperature rise process caused by focused irradiation can be recorded in real time. The real-time data of all temperature collection nodes are sent to the upper processing platform at a frequency of 1 Hz through the acquisition card, and the dynamic temperature distribution data is obtained by continuous operation for not less than 30 minutes.

[0061] After completing the temperature response collection, the optical output characteristics of the spectrum splitter during the irradiation process are further synchronized to record the changes of the wavefront of the outgoing light beam at different time points. In order to realize the capture of high-resolution wavefront information, a wavefront detection device with accurate pixel positioning function is placed at the opposite position of the light beam transmission path. The device uses a microlens array as the front receiving surface to realize real-time imaging of the local deflection angle of the transmitted light beam and inversely calculates the phase distortion state of the light beam. The spatial resolution of the device is 5 μm, and the sampling frequency is 30 frames per second, which can record the curvature, concave-convex change and tilt distortion on the wavefront surface at different time points. In order to ensure that the sampled wavefront data still has physical reality under high irradiation density, a heat blocking filter is installed in front of the wavefront sensor during the experiment to avoid secondary deformation of the sensor due to heat. The complete wavefront information at this time is synchronously obtained at the time stamp corresponding to each temperature sampling point, and then the temperature-wavefront time series data pair is formed to provide input basis for subsequent optical response modeling.

[0062] On the basis of the temperature data and wavefront data, the refractive index change of each film layer of the frequency divider under the corresponding temperature condition is calculated layer by layer, and the spatial refractive index distribution map is reconstructed. Taking titanium dioxide as an example, the thermal-optical coefficient value range is , the value of silicon dioxide is , and the value of zirconium oxide is , combined with the actual measured temperature of each temperature sampling point, the total refractive index change value of the multilayer film stack at different spatial positions is obtained by layer-by-layer superposition. The refractive index change values corresponding to all temperature points are spatially mapped to construct a refractive index gradient field in a three-dimensional coordinate system, with the coordinate axes being the horizontal X direction, the vertical Y direction and the thickness direction Z of the frequency divider. By directly expanding the corresponding relationship between the refractive index change value at each coordinate point and the time, it can be observed that near the center of the high-energy irradiation region, the refractive index change presents a clear nonlinear distribution, and has a high degree of coincidence with the wavefront distortion region, verifying that heat accumulation has a substantial impact on optical output. This step does not rely on approximate calculation or empirical simplification, but is based on physical constants and measured temperature values for derivation, ensuring the results have engineering reliability.

[0063] On the basis of the refractive index gradient data, the spatial variation trend is further visualized and a high-recognizability map is constructed to assist subsequent thermal lens risk judgment. By projecting the three-dimensional refractive index change data along the Z axis, a plurality of isosurface maps are generated, and different gradient intervals are identified by combining the piecewise linear color mapping method, forming a distribution map that intuitively displays the refractive index change. In the map, any area with a refractive index gradient greater than is marked as a high-risk area. This threshold is based on the experimental observation that a focal point shift of more than 0.5 mm in the actual system can cause the light spot to deviate from the preset receiving position. The map not only provides the distribution trend of the spatial thermal-optical properties, but also provides an intuitive physical reference for determining the initial conditions and risk areas of thermal lens formation, facilitating the precise positioning of the source of deviation in subsequent discrimination methods. At the same time of forming the map, it is spatially registered with the wavefront distortion data to determine whether the predicted area of the map coincides with the actual beam distortion area, in order to verify the accuracy and applicability of the modeling method.

[0064] The role of this step is to provide a quantifiable, verifiable and traceable physical analysis basis for the thermal optical distortion problem in the solar spectrum frequency heat cogeneration process, and to realize the early identification and risk assessment of the possible non-uniform refractive index change trend of the spectrum frequency device under high intensity irradiation by constructing the coupling analysis baseline between the irradiation parameters, heat distribution and optical output characteristics. Specifically, under solar concentration irradiation, the spectrum frequency device will produce non-uniform temperature rise in its internal structure due to the absorption of light energy of different wave bands. Especially in the multi-layer film coating structure, due to the significant difference in thermal conductivity, thermal expansion coefficient and thermal optical constant of different materials, temperature gradient field is easily formed in the vertical film layer direction and in-plane direction, further causing nonlinear change of refractive index at each position, causing the light beam propagation path to be deflected, forming the so-called thermal lens effect. If this phenomenon is not predicted and controlled, it will cause the deviation of the photoelectric and photothermal conversion paths, resulting in decreased energy utilization and even system safety hazards.

[0065] The refractive index gradient distribution map established by this step not only accurately locates the high-risk area of thermal distortion, but also provides a spatial prediction basis for optical deviation, serving as an important reference parameter for subsequent identification of light spot drift, adjustment of light splitting path and execution of optical axis correction. At the same time, as an intermediate variable with physical meaning, the map establishes a causal chain from irradiation energy input to light beam output deviation, which helps to improve the controllability and robustness of the entire heat and power cogeneration system in the design, control and operation stages. Therefore, this step plays a fundamental role in the present application, and is a key prerequisite for the effective operation of a series of mechanisms such as thermal lens sensitive factor identification, deviation state discrimination and dynamic control execution, and is also an important construction link for realizing the quantitative suppression strategy of thermal lens problem.

[0066] S002, based on the estimated map of refractive index gradient distribution, identifying the thermal lens sensitive factor causing the light spot deviation, extracting the corresponding light spot deviation threshold, film layer stress threshold and focusing tolerance, and establishing physical constraint conditions for judging the light beam deviation state;

[0067] Based on the previously constructed refractive index gradient distribution map, in order to further identify the main thermal mechanism causing the light spot deviation, a multi-dimensional physical parameter extraction method is used to carry out the judgment process of the thermal lens sensitive factor, and combined with the measured thermal-optical coupling characteristics, a physical judgment standard including the light spot deviation threshold, the film layer stress threshold and the focusing tolerance is proposed. Specifically, the following steps are included:

[0068] According to the spatial region with obvious non-uniform refractive index change in the refractive index gradient distribution map, the thermal sensitive positions that may cause light beam distortion are screened. In the aforementioned map, the positions concentrated in the central irradiation region and the edge transition zone have a refractive index gradient change value exceeding 10-4, which is the threshold value of the refractive index gradient change. Therefore, the positions in the central irradiation region and the edge transition zone are screened out as the thermal sensitive positions that may cause light beam distortion. per mm. The threshold is set by comparing with the actual wavefront probe data, that is, when the refractive index change rate at a certain position is greater than the threshold, which usually corresponds to the curvature mutation in the wavefront map, indicating that the beam propagation path is deflected in this area. After identifying this area, the temperature sampling point data spatially coinciding with it is extracted, and the temperature evolution trend of these points at the initial, middle and stable stages of irradiation is compared and analyzed. The results show that the temperature peak of these areas at the stable stage of irradiation is generally 15°C to 25°C higher than the average temperature of the device, and the temperature difference of some high points exceeds 30°C, indicating that heat has been obviously concentrated in these positions. These characteristics show that the area with large refractive index change is the sensitive section of the beam propagation trajectory prone to deflection, and is an important physical basis for judging the risk of thermal lens.

[0069] In the aforementioned identified heat-sensitive section, the material structure parameters of the spectral frequency divider film layer are extracted, and the internal stress distribution induced by temperature rise is calculated to determine the stress critical range that causes spot shift. Taking the 12-layer film spectral frequency divider used in the experiment as an example, it is composed of alternating titanium dioxide and silicon dioxide, with each layer thickness controlled between 110 nm and 180 nm, and the total film thickness of 1.8 μm. In the central irradiation area, temperature rise causes in-plane tensile stress in the titanium dioxide layer, while the silicon dioxide layer shows compressive stress response due to its smaller thermal expansion coefficient. By using high-precision strain gauges and non-contact digital image correlation method, the micro-displacement of the sample surface before and after irradiation is measured, and combined with the Young's modulus and Poisson's ratio of the material, the equivalent stress change range inside the film layer is back calculated. Taking the central film layer as a representative, the measured stress range is 52 MPa to 115 MPa. When the stress value exceeds 65 MPa, there is a clear corresponding relationship with the spot shift in the wavefront distortion map. Further repeated experiments under different power density irradiation conditions are carried out, and the spot center shift and stress value are paired and analyzed, and it is concluded that 65 MPa is the lower limit of stress that causes significant spot shift, thus establishing the film layer stress threshold of 65 MPa.

[0070] While obtaining the film stress threshold, the energy concentration distribution during beam focusing was analyzed to clarify the allowable focusing deviation range and determine the system's tolerable geometric tolerance. To this end, energy measurements were performed on the thermally offset beam shape at different receiving plane positions. A combined measurement method using a laser power meter and a thermistor was employed to measure the light intensity distribution at the optical axis center and different offset distances. Using distances of 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm, and 1.0 mm from the center as measurement points, the light intensity changes at each point were recorded at a focusing distance of 800 mm. Experimental results show that when the offset distance exceeds 0.6 mm, the received energy density decreases by more than 17%, affecting the synchronous matching of photovoltaic conversion efficiency and heat energy reception. Therefore, the focusing tolerance was set to within 0.6 mm. This focusing tolerance defines the acceptable deviation of the beam center position and is a crucial boundary parameter for subsequently determining whether the beam deviates from the predetermined trajectory.

[0071] Based on the obtained spot offset threshold, film stress threshold, and focusing tolerance, a set of physical constraints for judging the beam offset state is established. In this process, a composite judgment criterion is selected where two conditions must be met simultaneously to determine the offset state: first, the spot center offset distance exceeds 0.6 mm; second, the equivalent stress of the corresponding film layer is greater than or equal to 65 MPa. Simultaneously, this judgment must occur within the aforementioned thermosensitive region and be shown as a change value greater than [value missing] in the refractive index gradient spectrum. Position per millimeter. A triple verification mechanism is used here to ensure that the offset determination result has physical interpretability and structural consistency. In practical applications, when any position in the acquired real-time running data simultaneously meets the above three physical conditions, it can be identified that the beam has undergone focus drift induced by thermal lensing. This identification result can be used as the triggering basis for subsequent path reconstruction and optical adjustment.

[0072] The role of this step is to identify the key thermal lens sensitive factors that directly cause the spot shift in the spectral frequency divider by in-depth analysis of the spatial distribution map of the thermal-induced refractive index change, and to extract a series of physical boundary parameters with engineering constraint significance, thereby establishing a stable and quantifiable judgment basis for the subsequent beam shift state recognition and path correction mechanism. In the solar spectrum frequency conversion combined heat and power system, the beam shift problem is not caused by a single factor, but the result of the combined action of multiple thermal, force, and optical factors, among which the film layer stress response, refractive index gradient change, and focusing deviation are the three most significant variables. This step is aimed at this coupling problem. Through measurement and analysis means, it finds out which positions, material layers, and thermal conditions in the spectral frequency divider are most likely to produce abnormal refractive index changes that can change the optical path under actual high-power irradiation conditions, and further determines when the system will enter an abnormal state of optical path shift in these areas. By setting clear "spot shift threshold", "film layer stress threshold", and "focusing tolerance", the fuzzy "shift phenomenon" is converted into an objective physical state that can be measured, recognized, and judged, establishing a complete physical criterion chain for beam shift. This criterion is not only used for subsequent real-time state recognition and control decision triggering, but more importantly, it improves the prediction ability and response accuracy of the system to abnormal states, significantly different from the subjective mechanism of existing technologies that rely on experience setting or image change judgment, achieving an engineering closed loop from thermal-induced changes to shift control. It is a crucial intermediate link and judgment basis in the entire thermal lens effect suppression mechanism.

[0073] S003, constructing a focal point shift discriminator according to physical constraint conditions, inversely calculating real-time focal point coordinates based on beam wavefront information, calculating corresponding energy flow density, and dividing the spot shift degree into level labels;

[0074] Based on the constructed physical constraint conditions of spot shift, the focal point shift discrimination method for judging whether the focal point has spatial shift is further established by collecting and analyzing the wavefront information of the beam. Combined with the energy flow density measurement results, the spot shift state is divided into levels, thereby providing a basic judgment basis for the subsequent spectrum flow adjustment strategy. This method includes the following steps:

[0075] A wavefront information acquisition device is arranged on the exit path of the spectral frequency divider to obtain the wavefront variation of the exit light beam under solar irradiation. The wavefront detection of the light beam uses a microlens array type wavefront sensor, which is composed of square microlens units with a size of 150 μm. The overall detection surface size is 15 mm x 15 mm, and the spatial resolution is 100 sample points per millimeter. The wavefront sensor is placed on the main axis in the exit direction of the spectral frequency divider, about 300 mm away from the frequency divider, so as to accurately collect the wavefront distortion pattern of the exit light beam after the frequency divider. After the irradiation process starts, the solar simulator continuously outputs simulated light with a power density of 800 W / m². The wavefront sensor collects the two-dimensional phase distribution of the current light beam at a frequency of 20 frames per second. By analyzing the concave-convex curvature, main optical axis twist and phase discontinuous area in the wavefront, it can be identified whether the light beam has deviated due to the thermal-induced inhomogeneity of the refractive index. When the main optical axis deviates more than 0.2 mm in the X or Y direction, it is preliminarily determined that the focal point has spatially drifted, and the next step of accurate focal point positioning is needed.

[0076] After confirming the possible deviation of the light beam, the actual focal point spatial coordinates of the light beam are derived from the wavefront data, and the physical light path backtracking method is used to calculate the positions of the focal point in the X, Y and Z directions in three-dimensional space. The specific implementation is as follows: through the density and distribution trend of the phase contour in the wavefront diagram, combined with the focal length parameter (the initial focusing distance used in this embodiment is 800 mm), according to the geometric optical imaging principle, the relationship between the light beam exit angle and the focal length is physically mapped to obtain the actual deviation distance between the current focal point position and the theoretical reference focal point. For example, when the equal phase surface at the center of the wavefront changes from a sphere to an asymmetric ellipsoid, it indicates that the focal point has shifted in the Z axis direction. When the wavefront center deviates from the geometric center of the detection surface by more than 0.4 mm, it indicates that there is a focal point translation in the X or Y direction. This process does not rely on mathematical inversion formula, but is completely based on the relationship between wavefront diagram physical feature extraction and light path tracking to realize the real restoration of the focal point spatial coordinates.

[0077] After obtaining the focal position, a receiving device is arranged on the plane where the focal point is located to make a spatial measurement of the energy flux density at the position. The receiving device uses a planar receiving plate with a thermal response layer, which is a high-stability liquid crystal temperature-sensitive film with a thickness of 100 pm, an operating response range of 30°C to 90°C, a temperature measurement accuracy of ±0.2°C, and a response time of less than 300 ms. The thermal response film is matched with a high-resolution infrared thermal imager to record the two-dimensional thermal distribution of the light beam at the focal point in the X-Y plane. The energy flux density distribution is obtained by pixel gray scale inversion, and the influence of the spot shift on the focusing quality is judged according to the energy concentration degree. For example, when the energy is concentrated in an area with a diameter of less than 1.2 mm and the maximum heat flux density is higher than 400 W / m2, it indicates that the focusing is good; if the heat zone spreads outward and the concentration degree decreases to below 70% and the focal point diameter expands to more than 2.0 mm, it indicates that the thermal lens causes the focusing performance to decrease. The data will be used as basic parameters to evaluate the degree of influence of the focal point shift, and together with the focal point coordinate data, it will form the basis for the next level division.

[0078] The focal point shift distance and the energy flux density concentration degree are used as joint criteria to divide the spot shift level under the current state according to the aforementioned physical constraints of spot shift. In this embodiment, the spot shift degree is divided into five levels, each corresponding to a specific optical axis deviation distance, focal point diffusion radius, and energy flux density loss ratio. The specific division is as follows: level one is normal focusing state, focal point shift is less than 0.2 mm, focal point radius is less than 1.2 mm, and energy concentration degree is higher than 90%; level two is slight shift state, focal point shift is between 0.2 mm and 0.4 mm, focal point radius is between 1.2 mm and 1.5 mm, and concentration degree is between 85% and 90%; level three is moderate shift, shift is between 0.4 mm and 0.6 mm, focal point radius is between 1.5 mm and 1.8 mm, and concentration degree is between 80% and 85%; level four is severe shift, shift exceeds 0.6 mm, focal point radius is between 1.8 mm and 2.5 mm, and concentration degree is lower than 80%; and level five is extreme shift, shift exceeds 1.0 mm, focal point appears double focal point or twisted ring structure, and energy flux density distribution is discontinuous. The level label is used to identify the running deviation state of the current light beam, and is directly used as the basis for triggering subsequent dynamic light path adjustment, incident angle correction, and thermal management linkage operation.

[0079] The role of this step is to provide a real-time discrimination method based on physical measurement and thermal-optical coupling behavior identification for the possible focal point drift and energy flow offset problems caused by uneven heating and internal refractive index distribution changes of the spectral frequency divider during the operation of the solar spectrum frequency division combined heat and power device, thereby achieving effective identification and quantitative division of the light spot offset state. Specifically, when sunlight passes through the multi-layer film spectral frequency divider, due to the differences in the thermal expansion coefficient, refractive index thermal sensitivity coefficient and structure thickness of different film layers, local refractive index abnormalities are easily caused under high-intensity irradiation conditions, forming thermal lens effect, and then changing the light beam propagation path and distorting the wavefront structure, so that the originally precisely focused light beam is offset in space. If this offset cannot be identified in time, not only will the photovoltaic cell not receive enough visible light radiation, but also the thermal energy conversion unit will not be able to obtain high-density infrared energy, thereby causing the imbalance of the electric and heat output and reducing the overall system efficiency.

[0080] Therefore, based on physical light path analysis, this step first accurately measures the phase distortion of the light beam in space through the wavefront sensor, then deduces the actual coordinate position of the focal point, and then quantitatively analyzes the focusing deviation of the light beam in combination with the energy flow density distribution at the focal point. By setting physical judgment thresholds such as focal point offset distance, energy flow density drop ratio, and focusing area expansion degree, the offset level label of the light spot is further divided, so that different degrees of offset state can be clearly identified and used as the trigger basis for subsequent control actions. Unlike the existing technology which relies on image recognition or empirical parameters for fuzzy judgment, this step constructs a complete and repeatable physical criterion chain, ensuring that each offset identification has clear data support and physical background, thereby improving the accuracy, stability and response efficiency of the system operation.

[0081] More importantly, the offset discrimination process is not limited to theoretical modeling or software simulation, but realizes a full-process closed loop through the wavefront data collected by the real sensor and the thermal response image, which has strong engineering feasibility. Finally, this step not only provides a decision basis for dynamically adjusting the spectral flow path, performing optical axis correction and focal point reconstruction, but also realizes a closed loop chain from state perception, offset judgment to response control through the coordination of the offset level label and the subsequent thermal management control strategy, which is one of the key links for the invention to realize active inhibition of thermal lens effect.

[0082] S004, according to the light spot offset level label, dynamically adjusting the spectral flow path, realizing spectral reconstruction by adjusting the incident angle and the band width, and driving the flexible micro-actuator to perform optical axis correction operation, so that the reconstructed light beam is stably projected to the predetermined energy receiving area;

[0083] Based on the aforementioned spot offset level label obtained by beam wavefront inversion and energy flux density calculation, in order to realize the adaptive reconstruction of the spectral splitting path under the influence of thermal lens, further adopt three means of incident angle fine-tuning, spectral bandpass width adjustment and optical axis position correction to work together to ensure that the adjusted light beam can still accurately fall into the target energy receiving area. The entire implementation process includes the following steps:

[0084] According to the spot offset level label, it is determined whether spectral path adjustment is needed and which type of adjustment instruction needs to be executed. In this embodiment, the spot offset is divided into five levels, of which level one is the normal operating state and does not trigger any adjustment operation; level two is the slight offset state and only triggers the incident angle fine-tuning operation; levels three and above indicate that the focal point has shifted significantly and need to perform incident angle adjustment, bandpass width adjustment and optical axis correction operations simultaneously. For example, when the focal point offset distance is greater than 0.6 mm, the focal point diameter is expanded to more than 1.8 mm, and the energy flux density loss is more than 15%, it can be determined as a four-level offset, and the comprehensive adjustment process is immediately started. After determining the adjustment level, the preset adjustment parameter group is called to determine the incident angle change value, filter film layer thickness adjustment range and optical axis rotation angle range to be applied.

[0085] The incident angle adjustment operation is performed to adjust the angle of the incident light before entering the spectral frequency divider to control the projection direction of different waveband light beams. The incident angle control device used is a tiltable mirror composed of a high reflectivity aluminum silver film layer, with an anti-oxidation protective layer on the surface, a size of 50mmx50mm, a thickness of 3mm, and installed on a three-dimensional adjustment bracket. The bracket has two groups of piezoelectric ceramic driving units built-in, which control the inclination angle of the mirror in X and Y directions, with a single fine-tuning angle of 0.05° and a maximum adjustment range of ±3°. For example, when the offset level is three, a ±0.5° angle adjustment operation is performed; when the offset level is four, a ±1.2° angle adjustment operation is performed. By adjusting the inclination angle of the mirror, the direction of the light beam output by the solar simulator is slightly changed, thereby adjusting the main incident angle of the light beam received by the spectral frequency divider, so that the originally deviated waveband light can fall on the photovoltaic or photothermal receiving surface again.

[0086] On the basis of the incident angle adjustment, further bandpass width adjustment operation is implemented to optimize the spectral selectivity and avoid the energy overlap or mismatch of different wavebands at the receiving position. The embodiment adopts an adjustable interference filter film group structure, and the filter is composed of multiple dielectric film layers, including titanium dioxide (high refractive index) and silicon dioxide (low refractive index) deposited alternately, and the total film layer thickness is 2.5 pm. The filter is attached to a quartz glass substrate and installed on a slide rail support frame. The film layer thickness change range is between ±50 nm controlled by a piezoelectric micro-push driver, the bandpass center wavelength adjustment range is ±10 nm, and the band width adjustment range is ±5 nm. When the offset level reaches three levels and above, the bandpass bandwidth compression operation is performed, for example, the bandwidth is compressed from the original 30 nm to 25 nm or 20 nm, to avoid the energy waste or interference caused by the overflow of part of the spectrum to the non-target area due to the focus offset. The adjustment action can re-concentrate part of the spectrum energy deviated from the center within the controllable waveband range, improving the shunt efficiency.

[0087] After completing the incident angle adjustment and spectral bandwidth control, the micro-scale position correction operation of the optical axis direction is performed to return the offset light beam path to the designed light path from the spatial geometric direction. The optical axis correction structure used includes a group of flexible micro-displacement execution units, and the core structure is composed of a metal plane platform supported by four flexible hinges. The platform size is 30 mm x 30 mm, made of aluminum alloy, and the surface is anodized. Two piezoelectric ceramic sheet drive units are arranged below the platform to control the micro-displacement adjustment in the X and Y axis directions, with a step size of 2 pm each time and a maximum adjustment stroke of ±100 pm. When the offset level is determined to be three levels and above, the drive unit performs angle adjustment operation in proportion, for example, ±1° angle correction is performed when the offset is three levels, and ±2° angle correction is performed when the offset is four levels. The angle correction operation makes the light beam form a perpendicular incidence relationship with the receiving surface in the outgoing direction, ensuring that the reconstructed light beam is projected onto the photovoltaic cell array or heat energy absorption plate at the best angle. The landing point offset of the corrected light beam is controlled within ±0.2 mm, ensuring the system continues to operate stably.

[0088] The role of this step is to quickly and accurately adjust the spectral splitting path based on the determined spot offset level when the light beam is spatially offset, the focal point drifts or the spectral energy is misaligned due to thermal lens effect during the operation of spectral frequency heat and power cogeneration, to ensure that the light beams of different wavebands can still effectively project onto the photovoltaic power generation unit and the light-thermal conversion unit, thereby maintaining the continuity, stability and high efficiency of the electric-thermal collaborative output. Under the condition of concentrated solar radiation, the spectral frequency divider is easily offset due to the non-uniform change of the internal refractive index after being subjected to high-intensity thermal excitation. This offset not only changes the propagation direction of the light beam, but also causes the different waveband light energy to not accurately fall into the target receiving area, thereby destroying the energy distribution strategy of photoelectric and photothermal in the system design and reducing the overall energy utilization efficiency.

[0089] To solve this problem, this step realizes the dynamic reconstruction of the spectral path through three specific operations: first, the incident light direction is changed by the incident angle adjusting device, so that the offset light beam can re-enter the optimal working area of the spectral frequency divider; second, the spectral bandwidth and center wavelength of the band-pass filter layer are adjusted to redivide the energy wavebands in the transmission and reflection paths, avoiding spectral energy leakage or misplacement due to waveband diffusion or offset; finally, the optical axis direction is finely adjusted by the flexible micro-displacement actuator, so that the adjusted light beam is re-aligned with the photovoltaic cell array or the heat energy absorption plate in space, realizing high-density and high-precision light energy projection. The three operations cooperate with each other to actively compensate for the offset state from the three dimensions of light incidence, spectral selection and optical axis spatial direction, ensuring that the system can maintain the light beam alignment accuracy and spectral splitting efficiency under the influence of thermal lens.

[0090] Compared with the way of dealing with offset problems in the prior art by passive structure adjustment or optical tolerance design, the present application establishes a dynamic adjustment mechanism with fast response speed, high adjustment accuracy and clear control logic by combining active sensing and physical action, not only realizes real-time reconstruction of the spectral splitting path, but also significantly improves the robustness and intelligent level of the system in complex operating environment. Therefore, this step plays an important role in connecting the previous and subsequent thermal lens suppression technology paths, and is a key control bridge connecting the offset identification result and the subsequent thermal and optical regulation operation.

[0091] S005, the operating state after the optical axis correction and spectral splitting adjustment is fed back to the thermal management system, the liquid cooling flow pulse is applied and the phase change heat conduction channel is switched based on the heat distribution of the energy receiving area, and the absorptivity of the frequency divider surface coating is adjusted to realize the collaborative closed-loop operation of optical path adjustment and thermal management control;

[0092] To further enhance the operation stability and energy scheduling accuracy of the solar spectrum splitting combined heat and power device in the focal point offset state, after completing the optical axis correction and spectrum splitting path adjustment, the energy flow distribution, offset response amplitude and focal point position change information in the current operating state are fed back to the heat management control link, and according to the distribution of the actual landing area of the heat, through the execution of the liquid cooling flow pulse control, the phase change heat conduction path switching and the absorption coating absorption rate adjustment operation, a closed-loop control mechanism of mutual coordination of optical adjustment and heat load adjustment is constructed. The process includes the following steps:

[0093] After the optical axis correction and spectrum path reconstruction are completed, the heat change detection process of the receiving surface is immediately started to obtain the heat load distribution after energy refocusing. The detection process is completed by the thermocouple array and infrared thermal imaging equipment arranged behind the photovoltaic module back and the heat absorbing surface. The thermocouple adopts K-type wire with a diameter of 0.3mm and an installation spacing of 10mm, which is connected to a high-precision temperature acquisition module with a sampling period of 500ms. The infrared thermal imaging equipment is FLIRA615, with an infrared resolution of 640x480, a thermal sensitivity of 0.05°C and an acquisition frequency of 10 frames per second. After each optical axis adjustment cycle is completed, the infrared image and temperature acquisition value are uploaded synchronously, spatial matching is performed, and the two-dimensional temperature distribution map and temperature rise trend of the receiving surface are obtained. When it is detected that the focal point is focused too much on the photovoltaic receiving surface, the center temperature continuously exceeds 50°C, and the peripheral temperature remains within 30°C, it indicates that the energy landing point has formed a local heat concentration state, which is used as a signal to trigger the subsequent thermal response action.

[0094] According to the identification result of the heat concentration area, a short-time high-flow pulse is applied to the liquid cooling structure to quickly remove the locally accumulated heat and prevent the generation of hot spots or the secondary induction of thermal lenses. The liquid cooling structure adopts a straight-through type multi-tube liquid cooling plate, which internally embeds 18 parallelly arranged micro-channel copper pipes with an inner diameter of 1.5mm and a flow channel spacing of 12mm. The cooling medium is deionized water with an inlet temperature controlled at 18°C. The cooling plate inlet is connected with an electric diaphragm pump with a maximum flow rate of 600mL / min. The pump control circuit receives the area and temperature rise value calculation results of the thermal center position from the thermal imaging image analysis results, and automatically triggers the pulse cooling instruction when the center area temperature rise amplitude exceeds 10°C. When executing cooling, the original set flow rate is instantaneously increased from 300mL / min to 450mL / min, and the pulse duration is 5 seconds. The flow pulse forms a transient heat exchange enhancement zone through impingement convection mechanism, effectively diffuses the focal point heat to a larger area, improves the overall heat dissipation rate, and avoids local thermal expansion and contraction induced material structure distortion.

[0095] After the liquid cooling pulse operation is completed, the heat distribution differences in different regions of the hot surface are analyzed, and the heat conduction path switching of the phase change heat conduction structure is controlled accordingly, so as to further improve the heat conduction uniformity of the deep structure. The heat conduction structure used in this embodiment includes two types of phase change units. The first type is a paraffin-based material encapsulated in an aluminum cavity, with a melting point of 46°C and a latent heat of 210kJ / kg. The second type is an indium-tin alloy block, with a melting point of 78°C and a latent heat of 88kJ / kg. Both types of materials are laid in rectangular block form at the rear of the heat absorption surface and directly contact the copper bottom plate. The switching operation is controlled by a thermosensitive switch, which is set as follows: when the temperature in the monitoring area fluctuates between 45-55°C, activate the paraffin heat conduction block channel; when the temperature continues to rise and approaches 80°C, activate the indium-tin channel to achieve higher heat flux release. The heat conduction path switching time is not more than 8 seconds, relying on bidirectional temperature difference excitation response to ensure timely transfer of the heat conduction path when the heat load suddenly changes, maintain the uniform distribution of the overall structure thermal stress, and reduce the local thermal deformation caused by excessive transient thermal gradient.

[0096] After the heat load management operation is completed, the selective absorption coating performance of the spectrum frequency divider surface is adjusted according to the feedback focal point offset level and the receiving surface heat distribution state to enhance the light beam path stability and reflection interference suppression ability. The coating used in this embodiment is a multi-layer structure absorption film composed of chromium oxide black layer and silicon nitride control layer, with a chromium oxide layer thickness of 90nm and a silicon nitride layer thickness of 130nm. Its absorption rate is 88%-91% in the visible light band and 68%-73% in the near-infrared band. The coating is deposited on the front surface substrate glass of the spectrum frequency divider and is fine-tuned by temperature control heating sheet. The heating sheet is set on the back of the coating and is composed of graphite film, which can achieve a surface temperature control accuracy of ±5°C. When the temperature of the center of the heat focusing area rises too fast, the surface temperature of the coating is moderately increased, the lattice constant of the silicon nitride layer is slightly adjusted, the surface microstructure is changed, the absorption rate is increased by 2% or less, more mid-infrared radiation is absorbed, and the reflected light energy that is not fully converted is reduced. In addition, under the condition of four or five levels of offset level, the absorption rate increase cooperates with the heat conduction adjustment to effectively maintain the focusing stability and buffer the energy fluctuation during the offset process.

[0097] The role of this step is to build a closed-loop coordination relationship between optical path adjustment and thermal management control in the solar spectrum frequency heat cogeneration system, so that the running state after the optical axis correction and spectral splitting reconstruction can effectively act on the heat scheduling mechanism, realize the dynamic response and elimination of local heat load accumulation, and finally maintain the light-heat balance and stable operation of the system in high irradiance and focal point offset environment. Under high intensity sunlight conditions, thermal lens effect can easily cause beam focusing offset. Even if the beam path is realigned through incident angle adjustment, band width control and optical axis micro-displacement adjustment in the previous steps, when the light energy is refocused on the target receiving area, it often causes rapid increase of local temperature rise, forming a new hot spot area. If this heat concentration state is not responded and dynamically intervened in time, it may cause thermal stress deformation of optical elements, material performance degradation, and even induce secondary refractive index disturbance, which in turn interferes with the stability of the optical axis and the accuracy of light splitting, and destroys the closed-loop control effect of the system.

[0098] Therefore, this step builds a complete path of "optical behavior → heat distribution change → thermal regulation response" in feedback logic, precisely reduces the heat peak of the light spot center through liquid cooling flow pulse, avoids damage to the receiving components caused by instantaneous thermal shock; by switching different types of phase change heat conduction materials, it realizes the adaptation of heat flux in different temperature intervals, effectively alleviates the problem of local thermal deformation caused by excessive thermal gradient; by fine-tuning the selective absorption coating on the surface of the spectral frequency divider, it further controls energy reflection interference and heat retention, thereby achieving active dissipation of high energy density areas and rebalancing of light-heat path stability. In the whole process, each operation is based on the focal point position, offset level and heat distribution state obtained after correction in the previous steps, ensuring that the heat management operation is accurate, fast, limited and efficient, and will not cause additional disturbance to the optical path.

[0099] Compared with the operation mode of the traditional heat and power cogeneration device in which the heat management structure and the optical path adjustment structure are isolated from each other, this step realizes real-time linkage of energy path physical adjustment and thermal regulation behavior through feedback coordination, forming a multi-energy coupling control mechanism that is intelligent response and self-adaptive. This mechanism not only improves the energy efficiency ratio of the overall operation of the system, but also significantly enhances the robustness of the device in dynamic climate environment and complex load conditions, which is one of the key links for the invention to realize dynamic suppression of thermal lens effect and stable operation of light-heat cooperative output.

[0100] S006, based on the energy output data of the cooperative closed-loop operation, evaluating the overall operation effect of the system, adaptively correcting the threshold value of the thermal lens sensitive factor according to the evaluation result, and updating the parameters of the focal point offset discriminator, realizing dynamic optimization of the thermal lens suppression strategy;

[0101] To improve the adaptive control capability of the solar spectrum frequency division combined heat and power device in complex operating environment, after completing the aforementioned focal spot adjustment, spectrum path reconstruction and heat management collaborative closed-loop control, the overall operation effect is comprehensively evaluated based on the electric energy and heat energy output data in the operation cycle, and then the dominant influencing factor of thermal lens effect is identified, and the related parameters are adaptively corrected, and the focal spot offset judgment condition is updated, so that the dynamic optimization of thermal lens suppression strategy is realized, and the control precision of the stability of the light-heat path under the interference of high temperature and strong light is improved. The whole process includes the following steps:

[0102] The photoelectric and photothermal output data in a complete operation cycle are collected and processed to evaluate the current energy conversion efficiency and focal spot offset control effect. The operation cycle is defined as the data collection interval of 30 minutes of continuous stable operation of the system, wherein the photoelectric output data includes the direct current voltage (unit: volt), current (unit: ampere), output power (unit: watt) and power fluctuation amplitude output by the photovoltaic array; the heat energy output data includes the inlet temperature, outlet temperature, volume flow (unit: liter / minute) and heat exchange efficiency (calculated by heat power, unit: watt) of the heat medium (such as water or heat conducting oil) flowing through the heat energy absorption end. During data collection, the measurement error needs to be controlled within ±0.5% for voltage, ±0.3°C for temperature, and ±3mL / min for flow. After data collection is completed, the total amount of photoelectric and thermal energy output in the current cycle is compared with that in the previous cycle. If the total energy decreases by more than 10%, the heat and electricity collaborative output is out of sync, or the output power fluctuation is significantly intensified, it indicates that the thermal lens effect may not have been fully identified and suppressed in the current cycle, and the discriminant model needs to be updated.

[0103] The current operating data and the previous cycle thermal lens identification index are cross-analyzed to identify the current thermal lens dominant sensitive factor, and the threshold of the actual measurement value is adjusted. The sensitive factors include five: the light beam focal point offset speed (unit: millimeter / minute), the light spot area change rate (unit: square millimeter / minute), the film layer thermal stress growth rate (unit: megapascal / minute), the local refractive index gradient change amount (dimensionless), and the receiving area temperature gradient amplitude (unit: °C / centimeter). For example, if the light beam focal point drift speed in the X-axis direction reaches 0.42mm / min in the current cycle, and the threshold set by the original discriminator is 0.30mm / min, and the total energy efficiency decreases by 13% under this offset state, the offset speed threshold needs to be adjusted to more than 0.35mm / min to improve the response sensitivity of the discriminator. The thresholds of other sensitive factors also need to be proportionally corrected according to the actual energy loss caused by the offset, and a correction limit amplitude (not more than ±15%) is introduced to ensure the adjustment convergence.

[0104] According to the revised sensitive factor threshold, the parameter set in the focal point offset discriminator is updated, so as to intervene in the thermal lens identification and spot correction action in the future operation cycle. The focal point offset discriminator relies on a set of set thresholds and real-time sensing data comparison to determine whether there is focal point drift and its severity level. The update work includes: the "spot area expansion rate" is increased from the original set value 1.2 mm² / min to 1.4 mm² / min; the "film layer stress growth threshold" is adjusted from 8 MPa / min to 9.2 MPa / min; the "thermal spot area temperature gradient" early warning value is adjusted from 12°C / cm to 14°C / cm. After the update is completed, the simulation data sequence is loaded for verification, the dynamic process of the focal point shifting from the center area to the edge is simulated, and it is detected whether the discriminator sends an adjustment signal before the offset reaches 70% of the critical value. If the optical axis correction and incident angle adjustment instructions can be triggered in advance, it means that the parameter update is effective.

[0105] The parameter revision and discriminator update results are packaged as the current running version, and the regulation effect in the subsequent at least two complete operation cycles is monitored to verify whether the system energy efficiency is improved and the response stability is improved. The subsequent monitoring includes the light-heat cooperative output synchronization rate (output change curve convergence), focal point drift response time, focal point recovery energy flow density barycenter regression time, energy loss reduction amount (unit: kilowatt hour) and other indicators. If it is found that the optimized threshold setting significantly improves the energy utilization efficiency (the improvement amplitude is not less than 8%), reduces the adjustment frequency and does not produce misjudgment, it means that the dynamic update strategy is effective, and it is applied as the basic parameter for subsequent operation. If it is found that the adjustment of the discriminator sensitivity is too high to cause the system to adjust frequently, or the misjudgment rate increases by more than 5%, the last stable version is restored according to the data rollback mechanism to avoid negative feedback loop.

[0106] The role of this step is to use the photovoltaic and thermal energy output data generated by the cooperative closed-loop operation as the basis for evaluating the system operation state, and to build a dynamic thermal lens suppression strategy optimization mechanism based on measured performance feedback, so as to continuously improve the intelligent response ability, self-adaptive regulation ability and stable output ability of the solar spectrum frequency division combined heat and power device in the actual operation process. Traditional solar heat and power cooperative systems usually rely on pre-set static parameters to determine whether the spot is offset, such as fixed focal point drift threshold, film layer stress warning value, thermal gradient warning line, etc. However, in complex operating environments, these static parameters are difficult to cover all scenarios, which may cause misjudgment, missed judgment or adjustment delay, thereby affecting the cooperative efficiency of photovoltaic and photo-thermal output, and even inducing component thermal damage.

[0107] The step is to quantitatively analyze the photoelectric and thermal energy output data in each running cycle, identify the main physical factors affecting the current energy efficiency fluctuation, and then adaptively adjust the judgment threshold of the thermal lens sensitive factor (such as focal point drift rate, refractive index change amplitude, temperature gradient change value, etc.), and update the internal parameters of the focal point offset discriminator. This process not only improves the accuracy of the system in identifying thermal lens abnormalities, but also ensures the timeliness and pertinence of subsequent correction operations, avoiding the problem of continuous diffusion of spot offset and further decay of system energy efficiency due to response lag. At the same time, by solidifying the parameter adjustment results into a new version and continuously tracking the running effect, the mechanism also establishes an evolution path for the thermal lens control strategy, enabling the system to have the ability of continuous learning and gradual optimization.

[0108] This step constitutes the self-closing loop feedback core of the entire thermal lens suppression system, and is the key link to realize the "identification-response-optimization-feedback" whole-chain control logic. It connects the logical relationship between physical signals, energy efficiency evaluation and parameter update, so that the thermal lens suppression strategy is no longer dependent on single physical modeling and offline configuration, but turns to the online optimization path based on real running data. Finally, this mechanism can significantly improve the stable operation performance of the system under long-period, high-intensity and variable climate conditions, and is the technical foundation and core support for realizing intelligent solar photothermal and photoelectric collaborative control in a true sense.

[0109] Through the above-mentioned solar spectrum frequency division combined heat and power operation method, the focal point drift problem caused by thermal lens effect can be identified, responded and optimized in a whole process, dynamically and in a closed loop, significantly improving the optical stability and energy conversion efficiency of the spectrum frequency divider under long-time high-energy focusing operation conditions. The present application establishes the coupling relationship among beam wavefront, temperature distribution and refractive index change, realizes accurate prediction of the thermal lens formation mechanism, and ensures real-time identification and classification of the focal point drift state through thermal sensitive factor extraction and offset level discriminator construction. Then, through spectrum path reconstruction, incident angle adjustment and flexible optical axis calibration means, the beam offset is dynamically corrected to maintain the alignment accuracy of the photoelectric and photothermal paths. At the same time, the adjustment results are fed back to the thermal management operation, combined with cooling flow control, heat conduction path switching and surface coating adjustment, to realize the collaborative stability of the photothermal path. Finally, under the closed loop evaluation mechanism, the parameters are continuously updated to realize the continuous optimization and self-evolution control of the thermal lens suppression strategy. The overall scheme runs through the three-dimensional physical field collaborative control path of heat, light and force, forms a closed loop from source identification, path correction to end feedback, effectively guarantees the energy acquisition stability and output power consistency of photovoltaic units and heat collection devices in long-term operation, and overcomes the problems of energy efficiency fluctuation, load imbalance and device damage caused by uncontrolled thermal lens in the prior art.

[0110] The present application provides a method for suppressing thermal lens effect in a spectrum frequency divider, comprising the following steps: Figure 2The solar spectrum frequency division combined heat and power system shown comprises a coupling modeling analysis module, an offset criterion extraction module, a focal point offset discrimination module, a dynamic spectrum adjustment module, a collaborative closed-loop control module and a strategy optimization evaluation module:

[0111] The coupling modeling analysis module establishes a coupling analysis baseline between irradiation parameters, heat distribution and optical characteristics, collects real-time temperature data and beam wavefront information of the spectrum frequency divider under sunlight conditions, and generates an estimated graph of refractive index gradient distribution based on the variation law of thermal refractive index;

[0112] The offset criterion extraction module identifies the thermal lens sensitive factor causing the spot offset based on the estimated graph of refractive index gradient distribution, extracts the corresponding spot offset threshold, film stress threshold and focusing tolerance, and establishes physical constraint conditions for judging the beam offset state;

[0113] The focal point offset discrimination module constructs a focal point offset discriminator according to the physical constraint conditions, inverses real-time focal point coordinates based on the beam wavefront information, calculates the corresponding energy flow density, and divides the spot offset degree into a level label;

[0114] The dynamic spectrum adjustment module dynamically adjusts the spectrum shunt path according to the spot offset level label, realizes spectrum reconstruction by adjusting the incident angle and the bandpass width, simultaneously drives the flexible micro-actuator to perform optical axis correction operation, and makes the reconstructed beam stably project to the predetermined energy receiving area;

[0115] The collaborative closed-loop control module feeds back the running state after optical axis correction and spectrum shunt adjustment to the heat management system, applies liquid cooling flow pulses and switches phase change heat conduction channels based on the heat distribution of the energy receiving area, and adjusts the absorption rate of the frequency divider surface coating to realize collaborative closed-loop operation of optical path adjustment and heat management control;

[0116] The strategy optimization evaluation module evaluates the overall system operation effect based on the energy output data of the collaborative closed-loop operation, adaptively corrects the threshold of the thermal lens sensitive factor according to the evaluation result, and updates the parameters of the focal point offset discriminator to realize dynamic optimization of the thermal lens suppression strategy.

[0117] The solar spectrum frequency division combined heat and power operation method provided by the embodiment of the present application is realized by the above-mentioned solar spectrum frequency division combined heat and power system, and the specific method and process of the solar spectrum frequency division combined heat and power system are described in the above-mentioned embodiment of the solar spectrum frequency division combined heat and power operation method, which will not be repeated here.

[0118] The foregoing merely illustrates some exemplary embodiments of the application, and it will be appreciated that those skilled in the art will be able to devise various modifications without departing from the spirit and scope of the application. The appended drawings and description are illustrative only, and are not intended to be limiting.

Claims

1. A method of solar spectrum splitting combined heat and power operation, characterized in that, The method comprises the following steps: S001, establishing a coupling analysis baseline between irradiation parameters, heat distribution and optical characteristics, collecting real-time temperature data and beam wavefront information of the spectral frequency divider under sunlight conditions, and generating an estimated graph of refractive index gradient distribution based on the thermal refractive index change rule; S002, based on the estimated graph of refractive index gradient distribution, identifying the thermal lens sensitive factor causing the spot shift, extracting the corresponding spot shift threshold, film stress threshold and focusing tolerance, and establishing physical constraint conditions for judging the beam shift state; S003, constructing a focal point shift discriminator according to the physical constraint conditions, inversely calculating the real-time focal point coordinates based on the beam wavefront information, calculating the corresponding energy flow density, and dividing the spot shift degree into a level label; S004, according to the spot shift level label, dynamically adjusting the spectral flow path, realizing spectrum reconstruction by adjusting the incident angle and the bandpass width, and driving the flexible micro-actuator to perform optical axis correction operation, so that the reconstructed beam is stably projected to the predetermined energy receiving area; S005, feeding back the running state after the optical axis correction and spectrum flow adjustment to the thermal management system, applying liquid cooling flow pulse and switching phase change heat conduction channel based on the heat distribution of the energy receiving area, and adjusting the absorption rate of the frequency divider surface coating to realize the cooperative closed-loop operation of optical path adjustment and thermal management control; S006, based on the energy output data of the cooperative closed-loop operation, evaluating the overall system operation effect, adaptively correcting the threshold value of the thermal lens sensitive factor, and updating the parameters of the focal point shift discriminator to realize dynamic optimization of the thermal lens suppression strategy.

2. The solar spectrum splitting combined cycle power generation method of claim 1, wherein, Step S001 comprises: A solar light simulation irradiation environment with a wavelength output capacity of 300nm to 2500nm is constructed, and a quartz collimating lens and a parabolic mirror combination structure are used to focus the output beam and project the beam to the surface of a multi-layer film spectral frequency divider sample; Under high-energy irradiation conditions, real-time temperature data of the center area, edge area and film layer interlayer of the spectral frequency divider surface are collected by a thermistor and an infrared thermometer, and the data are transmitted to the upper platform at a frequency of 1Hz; The wavefront information of the beam after passing through the spectral frequency divider is synchronously collected, the phase distortion of the outgoing light is recorded by a microlens array wavefront detection device, and the wavefront data and the corresponding temperature data are formed into time-synchronized data pairs; According to the thermal refractive index change coefficient of each film layer material of the frequency divider, the refractive index change value at each spatial position is calculated combined with the temperature measurement data, a three-dimensional refractive index gradient distribution map is reconstructed, and the area with a gradient greater than is marked as a high-risk area of thermal lens by color mapping, to form an optical prediction map for subsequent offset judgment.

3. The solar spectrum splitting combined cycle power generation method of claim 1, wherein, Step S002 comprises: Based on the obtained refractive index gradient distribution map, the refractive index change value greater than 0.1 is screened out The heat-sensitive region per millimeter is taken as a high-risk area, and the temperature sampling data of the corresponding region is extracted for heat accumulation feature analysis; In the above high-risk area, the equivalent internal stress change caused by temperature rise is measured in combination with the film layer structure of the spectral frequency divider, and the film layer stress threshold highly related to the spot shift is extracted, and the film layer stress threshold is set to 65MPa; By measuring the energy distribution of the spot at different shift positions, it is determined that the energy receiving will be significantly reduced when the shift exceeds 0.6mm, and accordingly the focusing tolerance is set to within 0.6mm; Based on the spot shift threshold, the film layer stress threshold and the focusing tolerance, the physical constraint conditions for judging the beam shift state are established, and when any position simultaneously satisfies the above three physical conditions of spot shift threshold, film layer stress threshold and focusing tolerance, it is judged that the position has focal point drift induced by thermal lens.

4. The solar spectrum splitting combined cycle power generation method of claim 1, wherein, Step S003 includes: On the basis of the established physical constraints of the spot offset, a microlens array type wavefront sensor is arranged on the main axis of the spectral frequency divider, a two-dimensional wavefront phase map of the outgoing light beam under sunlight conditions is collected, and the optical axis offset is monitored at a frequency of 20 frames per second; When the main optical axis represented by the wavefront data deviates by more than 0.2 mm in the X or Y direction, the coordinates of the focal point in the X, Y and Z directions in the three-dimensional space are calculated according to the relationship between the phase contour density in the wavefront map and the optical path tracking, and the spatial offset distance of the focal point from the reference position is obtained; A receiving device composed of a high-stability liquid crystal temperature-sensitive film is arranged at the focal point position, and a two-dimensional thermal image of the focal point thermal area is measured by an infrared thermal imager, the focal point energy flux density distribution is obtained through gray inversion, and the focal point energy concentration degree is evaluated; The focal point spatial offset distance and the energy flux density concentration degree are used as joint criteria, the current spot offset state is divided into five levels according to the extracted spot offset threshold, film layer stress threshold and focusing tolerance, and is marked as level one to level five, which is used as the basis for subsequent spectral path dynamic adjustment and incident angle correction.

5. The solar spectrum splitting combined cycle power generation method of claim 1, wherein, Step S004 includes: According to the determined spot offset level label, it is judged whether the spectral path adjustment operation is triggered, if the offset level is one, no adjustment is performed, if the offset level is two, the incident angle fine adjustment operation is performed, and if the offset level is three or above, the incident angle adjustment, band width adjustment and optical axis correction operations are simultaneously performed; Through the tiltable mirror assembly driven by the piezoelectric ceramic, the inclination angles of the mirror in the X direction and the Y direction are adjusted, the reflection angles are controlled within ±3° respectively, the main incident angle of the light beam to the spectral frequency divider is changed, and the separated light beams are re-aligned to the target energy receiving area; The thickness of the interference filter film layer is adjusted by the piezoelectric micro-push driver, the bandpass center wavelength is adjusted within ±50 nm, the bandwidth is compressed to 25 nm or 20 nm, and the spectral energy concentration and receiving efficiency are improved; Through the piezoelectric ceramic sheet driving unit on the flexible hinge platform, the optical axis is corrected in the X and Y directions, so that the light beam and the target receiving surface are kept perpendicular to the incident, and finally the landing point offset of the corrected light beam is controlled within ±0.2 mm, ensuring that the energy is stably transmitted to the photovoltaic or photothermal unit.

6. The solar spectrum splitting combined cycle power generation method of claim 1, wherein, Step S005 includes: After the optical axis correction and spectral flow path adjustment operations are completed, based on the heat redistribution on the receiving surface, the thermocouple array and infrared thermal imaging equipment arranged behind the photovoltaic module and heat absorption surface are used to collect the two-dimensional temperature distribution map of the heat surface, and it is judged whether there is a heat concentration state with a central temperature higher than 50℃ and a peripheral temperature lower than 30℃; When the heat concentration state is determined to be true, the liquid cooling plate structure is controlled to apply a transient strong cooling flow pulse, the flow rate is instantaneously increased from 300 mL / min to 450 mL / min, and the pulse duration is 5 seconds, so as to quickly diffuse the local heat and reduce the temperature rise amplitude of the central overheating area; After the liquid cooling pulse operation is completed, the heat conduction path of the paraffin and indium tin phase change heat conduction structure is switched according to the temperature difference of different regions of the hot surface. When the temperature of the hot surface is between 45 DEG C and 55 DEG C, the paraffin heat conduction path is activated. When the temperature approaches 80 DEG C, the indium tin heat conduction path is activated, so as to realize the balanced conduction and release of deep heat. According to the focal point offset level and the thermal distribution characteristics, the absorption performance of the multilayer absorption film composed of chromium oxide black and silicon nitride deposited on the surface of the spectral frequency divider is adjusted, the surface temperature is finely adjusted to within ±5 DEG C by the graphite heating sheet, so that the absorption rate in the middle and far infrared wave band is increased by not more than 2%, so as to enhance the energy absorption stability and alleviate the photothermal fluctuation under high offset level.

7. The solar spectrum splitting combined cycle power generation method of claim 1, wherein, Step S006 comprises: After the optical axis correction and thermal management closed loop operation is completed, the direct current voltage, current, output power and power fluctuation amplitude of the photovoltaic array in the current complete operation period, and the inlet temperature, outlet temperature, volume flow and heat exchange efficiency data of the thermal medium of the heat energy absorption end are collected, and it is judged whether there is a situation that the total energy decreases by more than 10%, the output is out of synchronization, or the power fluctuation is intensified compared with the previous period; If it is judged that there is an abnormality, based on the current period of the light beam focal point offset speed, the light spot area change rate, the film layer thermal stress growth rate, the local refractive index gradient change amount and the receiving area temperature gradient amplitude, combined with the energy loss ratio, the threshold value of each sensitive factor is adjusted by not more than ±15%; The modified sensitive factor threshold value is used to update the focal point offset discriminator parameter set, including adjusting the light spot area expansion rate setting value to 1.4 mm² / min, adjusting the film layer stress growth critical value to 9.2 MPa / min, and adjusting the thermal spot area temperature gradient warning value to 14°C / cm, and verifying through a simulation sequence whether the new parameters can trigger the correction instruction in advance before the offset reaches the 70% critical value; The updated parameters are packaged as the current running version, and the photothermal output synchronization rate, focal point drift response time, focal point regression speed and energy loss change in the subsequent two operation periods are monitored. If the energy efficiency is improved by not less than 8% and the misjudgment rate is not more than 5%, it is confirmed that the parameter update is effective, and is continued to be used in the subsequent control strategy.

8. A solar spectrum splitting combined heat and power system for implementing the solar spectrum splitting combined heat and power operation method of any one of claims 1-7, characterized in that, The coupling modeling analysis module, the offset criterion extraction module, the focal point offset discrimination module, the dynamic spectrum adjustment module, the collaborative closed loop control module and the strategy optimization evaluation module are included: The coupling modeling analysis module establishes the coupling analysis baseline between the irradiation parameters, heat distribution and optical characteristics, collects the real-time temperature data and beam wavefront information of the spectral frequency divider under sunlight conditions, and generates an estimated graph of refractive index gradient distribution based on the thermal refractive index variation law; The offset criterion extraction module identifies the thermal lens sensitive factors causing the light spot offset based on the estimated graph of refractive index gradient distribution, extracts the corresponding light spot offset threshold, film layer stress threshold and focusing tolerance, and establishes physical constraint conditions for judging the beam offset state. The focus offset discrimination module constructs a focus offset discriminator according to a physical constraint condition, inverses real-time focus coordinates based on beam wavefront information, calculates corresponding energy flow density, and divides the spot offset degree into a level label; The dynamic spectrum adjustment module dynamically adjusts the spectrum shunt path according to the spot offset level label, realizes spectrum reconstruction by adjusting the incident angle and the bandpass width, simultaneously drives the flexible micro-actuator to perform the optical axis correction operation, and makes the reconstructed light beam stably project to the predetermined energy receiving area; The collaborative closed-loop control module feeds back the running state after the optical axis correction and the spectrum shunt adjustment to the heat management system, applies liquid cooling flow pulses and switches the phase change heat conduction channel based on the heat distribution of the energy receiving area, and adjusts the absorption rate of the frequency divider surface coating to realize the collaborative closed-loop operation of the optical path adjustment and the heat management control; The strategy optimization evaluation module evaluates the overall system operation effect based on the energy output data of the collaborative closed-loop operation, adaptively corrects the threshold value of the thermal lens sensitive factor according to the evaluation result, and updates the parameters of the focus offset discriminator to realize the dynamic optimization of the thermal lens suppression strategy.

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