Compensation method of differential pressure flow transmitter, electronic equipment and computer program product

Abstract

The invention provides a compensation method of a differential pressure flow transmitter, electronic equipment and a computer program product. Relates to the technical field of nuclear power. In view of the problem of low measurement accuracy of a traditional differential pressure flow transmitter, the method comprises the following steps of: calibrating reference positions of a first wide-range transmitter and a second wide-range transmitter in a system zero-flow state; in a system target range section, measuring difference values of the calibrated first wide-range transmitter and the calibrated second wide-range transmitter relative to a reference value are obtained; when the measurement difference value is greater than a preset comprehensive uncertainty, calculating a first flow correction value of the first wide-range transmitter and a second flow correction value of the second wide-range transmitter based on a flow compensation model; and when the relative error of the first flow correction value and the second flow correction value is within a preset cross comparison standard, calculating a flow compensation value of the wide-range transmitter based on a cooperative compensation model. The embodiment of the invention can improve the measurement accuracy and the stability of water level control.

Description

Technical Field

[0001] The present application relates to the field of nuclear power technology, and in particular to a compensation method for a differential pressure flow transmitter, an electronic device, and a computer program product. Background Art

[0002] The main feedwater flow rate for the evaporator in a nuclear power plant refers to the flow through the steam generator's feedwater system. By measuring and controlling this feedwater flow rate, the evaporator's water level is stabilized, ensuring safe and stable power generation. The measurement accuracy of a differential pressure flow transmitter, used as a flow monitoring unit, directly impacts the effectiveness of water level control.

[0003] However, in the low flow section, due to the low measurement accuracy of the differential pressure flow transmitter for the main feed water flow, the evaporator water level control of the nuclear power unit in the low flow section is prone to deviations between the steam flow and the main feed water flow, which in turn causes large disturbances in the evaporator water level. Summary of the Invention

[0004] According to various embodiments of the present application, a compensation method, electronic device, and computer program product for a differential pressure flow transmitter are provided; these can improve measurement accuracy and the stability of water level control.

[0005] In a first aspect, the present application provides a compensation method for a differential pressure flow transmitter, which is applied to the differential pressure flow transmitter, wherein the differential pressure flow transmitter includes a wide-range transmitter; the wide-range transmitter includes a first wide-range transmitter and a second wide-range transmitter that are redundant with each other; the method includes:

[0006] Under the system zero flow state, the reference positions of the first wide-range transmitter and the second wide-range transmitter are calibrated; in the system target range segment, the measurement difference values ​​of the calibrated first wide-range transmitter and the second wide-range transmitter relative to the reference value are obtained; when the measurement difference value is greater than the preset comprehensive uncertainty, the first flow correction value of the first wide-range transmitter and the second flow correction value of the second wide-range transmitter are calculated based on the flow compensation model; when the relative error between the first flow correction value and the second flow correction value is within the preset cross-comparison standard, the flow compensation value of the wide-range transmitter is calculated based on the collaborative compensation model; wherein, the flow compensation model includes a polynomial compensation model and a linear-nonlinear hybrid model for respectively calculating different range segments in the system target range segment.

[0007] Through the above method, by calibrating the reference position of the transmitter, preliminarily calculating the flow correction value based on the measurement difference value, and performing collaborative compensation calculation based on the relative error of the flow correction value to obtain the flow compensation value, the influence of zero drift on the flow measurement accuracy is reduced, and the sensitivity of the square root operation of the flow value to the differential pressure value in the low-range segment is improved, thereby improving the flow measurement accuracy in the low-range segment and the reliability of water level control, thereby ensuring the safe and stable operation of the nuclear power unit; and the method has strong ease of use and practicality.

[0008] In a second aspect, the present application provides a compensation device for a differential pressure flow transmitter, which is applied to the differential pressure flow transmitter, wherein the differential pressure flow transmitter includes a wide-range transmitter; the wide-range transmitter includes a first wide-range transmitter and a second wide-range transmitter that are redundant with each other; the device includes:

[0009] a reference calibration unit, configured to calibrate the reference positions of the first wide-range transmitter and the second wide-range transmitter under a system zero flow state;

[0010] a deviation detection unit, configured to obtain, in a target range of the system, measurement difference values ​​of the calibrated first wide-range transmitter and the second wide-range transmitter relative to a reference value;

[0011] a preliminary correction unit, configured to calculate a first flow correction value of the first wide-range transmitter and a second flow correction value of the second wide-range transmitter based on a flow compensation model when the measurement difference value is greater than a preset comprehensive uncertainty;

[0012] a collaborative compensation unit, configured to calculate a flow compensation value for the wide-range transmitter based on a collaborative compensation model when a relative error between the first flow correction value and the second flow correction value is within a preset cross-comparison standard;

[0013] The flow compensation model includes a polynomial compensation model and a linear-nonlinear hybrid model respectively corresponding to different range segments in the target range segment of the system.

[0014] In a third aspect, the present application provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements any one of the methods described in the first aspect when executing the computer program.

[0015] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method according to any one of the first aspects is implemented.

[0016] In a fifth aspect, the present application provides a computer program product, which, when executed on a device, enables the device to execute any of the methods described in the first aspect.

[0017] It can be understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the structure of the main feed water measurement system for a nuclear power unit provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the implementation flow of the compensation method for the differential pressure flow transmitter provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the overall implementation process of the compensation method provided in the embodiment of the present application;

[0022] Figure 4 A schematic structural diagram of a compensation device for a differential pressure flow transmitter provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0026] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0027] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0029] In the differential pressure flow measurement process, the theoretical flow equation is established based on the Bernoulli equation, such as

[0030] Q is the flow rate, △p is the differential pressure value, ρ is the fluid density, k is the instrument coefficient, and the flow measurement value is obtained based on the square root of the differential pressure value. In the low flow stage (such as the 0-25% range segment), the square root operation causes the sensitivity of the flow rate to the differential pressure value to drop sharply, and the tiny fluctuation error of the differential pressure value will be amplified by the square root operation, thereby increasing the nonlinear error of the measurement value; for example, a 1% error in the differential pressure value will cause the flow error to reach 10% at 5% range. In addition, in the low flow stage, the differential pressure signal is weak, the background noise of the sensor (such as 0.1% FS) accounts for a high proportion, and the signal-to-noise ratio deteriorates, making the flow transmitter (also known as a differential pressure flow transmitter) more sensitive to noise interference; and due to factors such as the deviation of the positive / negative pressure side sampling pipeline and sensor aging, long-term zero drift accumulates, affecting the accuracy of the flow transmitter reference position.

[0031] Based on the above factors, the measurement accuracy of the main feed water flow of the flow transmitter is low in the low flow stage. The evaporator water level control of the nuclear power unit has a low measurement accuracy of the main feed water flow at low flow, resulting in a steam-water flow deviation, which in turn leads to a large disturbance in the evaporator water level. Especially during the switching process of the main valve and the bypass valve, the disturbance is more obvious.

[0032] In response to the problem of low accuracy in main water supply flow measurement in the above-mentioned technology, an embodiment of the present application provides a compensation method for a differential pressure flow transmitter, which reduces measurement errors and improves flow measurement accuracy by automatically calibrating the reference position of the differential pressure flow transmitter, monitoring the flow difference value of the measured value relative to the reference value, preliminarily calculating the correction value through segmented enhanced compensation, and calculating the compensation value through collaborative compensation.

[0033] The specific implementation process of the compensation method for the differential pressure flow transmitter is introduced below through an embodiment.

[0034] See Figure 1 , Figure 1 This is a schematic diagram of the structure of the main feed water flow measurement system for a nuclear power unit provided in an embodiment of the present application; Figure 1 As shown, the system includes a water supply pump, a regulating valve, a differential pressure flow transmitter (hereinafter referred to as a flow transmitter or transmitter), a heat balance calculation unit, and a process system. The water supply pump provides water power for the entire process system, drawing water from the source and raising it to a certain pressure to ensure that the water can enter the subsequent links. The regulating valve adjusts the valve opening according to the system's set requirements or feedback signals to control the flow of water entering the system. After being regulated by the regulating valve, the water supply continues to flow. The differential pressure flow transmitter measures the differential pressure generated when the water supply flows in the pipeline and measures a certain relationship between the measured differential pressure and the flow rate, such as the conversion relationship established based on the Bernoulli equation. The flow value of the water supply is obtained by measuring the pressure difference. The heat balance calculation unit B is used to calculate the heat balance flow, that is, the steam flow, by using the heat balance method, so that the water supply flow and the steam flow in the evaporator reach a dynamic balance.

[0035] The differential pressure flow transmitter includes a wide-range transmitter and a narrow-range transmitter N (hereinafter referred to as the N transmitter). The wide-range transmitter includes a first wide-range transmitter WA (hereinafter referred to as the WA transmitter) and a second wide-range transmitter WB (hereinafter referred to as the WB transmitter), which are redundant. The wide-range transmitter can measure flow under 0-100% operating conditions and is primarily used for evaporator water level control and regulation. The dual-redundancy design improves measurement reliability. The narrow-range transmitter is suitable for flow measurement at low loads (e.g., less than 15% power) and is primarily used for reactor protection.

[0036] Based on the above system architecture, the specific implementation process of the compensation method of the differential pressure flow transmitter is further introduced below.

[0037] See Figure 2 , Figure 2 Schematic diagram of the implementation flow of the compensation method of the differential pressure flow transmitter provided in the embodiment of the present application; Figure 2 As shown, the method may include the following steps:

[0038] S201 , in a system zero flow state, calibrating the reference positions of the first wide-range transmitter and the second wide-range transmitter.

[0039] In an embodiment of the present application, when the system is in a zero flow state, such as when the valve is closed or the water pump is stopped, the offset output by the wide-range transmitter is recorded, and based on the size of the offset and the measurement uncertainty of the entire channel of the wide-range flow measurement, the reference position of the wide-range transmitter is calibrated to ensure the zero point accuracy of the wide-range transmitter.

[0040] For example, the offset is the deviation of the output value of a wide-range transmitter from the theoretical zero point at a known zero flow rate. For example, if the theoretical zero point is 4 mA (e.g., 4 mA corresponds to zero flow), and the recorded actual output is 4.02 mA, the offset is 0.02 mA (corresponding to a flow rate of approximately 0.3% FS). The full-channel measurement uncertainty is used to characterize the reasonable fluctuation range (e.g., ±0.1% FS) of the wide-range transmitter output at zero flow rate; it is typically derived from sensor noise, temperature drift, and signal chain errors.

[0041] Accordingly, when the offset is within the measurement uncertainty range of the entire channel, the system can automatically correct it and calibrate the reference position to 0; when the offset exceeds the uncertainty, the reference position of the transmitter can be calibrated after troubleshooting the system fault, or the reference position can be calibrated after the transmitter and channel are calibrated according to their corresponding uncertainties; reducing the impact of abnormalities in the wide-range transmitter itself or the channel on measurement accuracy.

[0042] In some embodiments, calibrating the reference positions of the first wide-range transmitter and the second wide-range transmitter under a system zero flow state includes:

[0043] Under the system zero flow state, a first offset of the first wide-range transmitter and a second offset of the second wide-range transmitter are obtained; when the first offset and the second offset meet the preset uncertainty, the reference positions of the first wide-range transmitter and the second wide-range transmitter are calibrated.

[0044] Exemplarily, the calibration of the reference position of the wide-range transmitter includes calibrating the first wide-range transmitter and the second wide-range transmitter respectively; the preset uncertainties corresponding to both can be the measurement uncertainty ε1 of the wide-range flow full channel, which is obtained by the root mean square of the channel uncertainty; for example, the error sources of the measurement uncertainty of the wide-range flow full channel include sensor noise u1, temperature drift u2 and signal chain error u3, and the measurement uncertainty U of the full channel is obtained by calculating the root mean square of each error source, such as Where k is the inclusion factor and can take the value 2.

[0045] Among them, in order to prevent incorrect correction of the wide-range transmitter and exclude common cause failure of the first wide-range transmitter and the second wide-range transmitter or abnormality of a single transmitter, the preset uncertainty can also include setting a cross-comparison standard ε2 for the first wide-range transmitter and the second wide-range transmitter, which is used to evaluate whether the relative deviation between the first offset and the second offset is within a reasonable range, and ensure the redundant effectiveness of the two transmitters through mutual verification.

[0046] It should be noted that the error sources of the above-mentioned full-channel measurement uncertainty are only illustrative. In actual application scenarios, the error sources included can also be determined based on the actual operating environment of the system, such as installation errors.

[0047] In some embodiments, the differential pressure flow transmitter further comprises a narrow range transmitter; and the method further comprises:

[0048] Under the system zero flow state, a third offset of the narrow-range transmitter is obtained; when the third offset satisfies a preset uncertainty, the reference position of the narrow-range transmitter is calibrated; wherein the calibrated narrow-range transmitter is used to measure a reference value (such as a narrow-range measurement value).

[0049] For example, Figure 1 The differential pressure flow transmitter shown also includes a narrow-range transmitter. The transmitter calibration process also includes calibration of the narrow-range transmitter's reference position. When the system is in a zero-flow state, the offset of the narrow-range transmitter is recorded, and the reference position of the narrow-range transmitter is calibrated based on the offset and the preset uncertainty. The preset uncertainty corresponding to the narrow-range transmitter can be the measurement uncertainty of the entire narrow-range flow channel, obtained using the root mean square of the channel uncertainty. For example, the error sources of the measurement uncertainty of the entire channel include sensor measurement error, temperature influence error, signal chain error, sensor aging drift error, etc. Based on the same calculation principle as the measurement uncertainty of the entire channel corresponding to the wide-range transmitter mentioned above, the measurement uncertainty ε3 of the entire channel corresponding to the narrow-range transmitter is obtained by calculating the root mean square of each error source.

[0050] In some embodiments, obtaining a first offset of a first wide-range transmitter, a second offset of a second wide-range transmitter, and a third offset of a narrow-range transmitter includes:

[0051] At the same sampling moment, the first flow sampling value of the first wide-range transmitter, the second flow sampling value of the second wide-range transmitter, and the third flow sampling value of the narrow-range transmitter are obtained; based on the first flow sampling value and the number of sampling points within the sampling period, a first offset is calculated; based on the second flow sampling value and the number of sampling points within the sampling period, a second offset is calculated; based on the third flow sampling value and the number of sampling points within the sampling period, a third offset is calculated.

[0052] For example, in order to ensure the stability of the system control loop, the validity of redundant data and the reliability of the system, a synchronous sampling method is adopted to collect the first flow sampling value of the first wide flow transmitter, the second flow sampling value of the second wide-range transmitter and the third flow sampling value of the narrow-range transmitter, and calculate the corresponding first offset, second offset and third offset respectively.

[0053] For example, the first offset, second offset, and third offset are calculated using the following expressions:

[0054]

[0055] Among them, I WA (t), I WB (t), I N (t) are the real-time flow sampling values ​​of WA transmitter, WB transmitter and N transmitter respectively; I WAO is the first offset of the WA transmitter in the system zero flow state, I WBO is the second offset of the WB transmitter in the system zero flow state, I N is the third offset of N transmitters in the system zero flow state, n is the number of sampling points in the sampling period T, and t is the sampling time.

[0056] In some embodiments, when calibrating the reference position of the transmitter, different calibration methods are selected based on the size of the offset in the system zero flow state. When the first offset, the second offset, and the third offset meet the preset uncertainty, the reference position of the first wide-range transmitter, the second wide-range transmitter, and the narrow-range transmitter is calibrated, including:

[0057] Calculate the first, second, third, and fourth ratios of the first offset, the second offset, the difference between the first and second offsets, and the third offset relative to the current range, respectively. When the first and second ratios are less than or equal to the first uncertainty, and the third ratio is less than or equal to the second transmitter poor comparison standard, calibrate the reference points of the first wide-range transmitter and the second wide-range transmitter. When the fourth ratio is less than or equal to the third uncertainty, calibrate the reference point of the narrow-range transmitter.

[0058] Exemplarily, the ratio of the offset to the current range is calculated, and the reference position calibration method is determined based on the ratio and the magnitude of the uncertainty.

[0059] For example, the first ratio of the first offset to the current range interval is calculated respectively. The second ratio of the second offset to the current range A third ratio of the difference between the first offset and the second offset to the current range and a fourth ratio of the third offset to the current range interval Among them, I S The current range interval refers to the range of the standard current signal output by the differential pressure flow transmitter, which is used to linearly map the physical flow value to the electrical signal.

[0060] Accordingly, in as well as When , the offset of WA and WB transmitters is corrected to 0 flow. Among them, ε2 is the cross comparison standard of WA and WB transmitters, which is determined based on the first uncertainty, such as ε2 = [δ(FS) / ε1-2]×ε1, where δ(FS) is the maximum deviation of the full scale, such as 0.2% FS, which is used to characterize the overall accuracy requirements of the transmitter within the full range. By setting the first uncertainty ε1 and the cross comparison standard ε2, it is possible to prevent the wrong correction of the transmitter and prevent the real deviation caused by problems such as system online. When the above conditions are met, the first offset and the second offset are corrected to 0 flow, such as the corrected first offset I' AO =0, the corrected second offset I' BO =0.

[0061] For example, in When the N transmitter is in the 3rd offset state, the N transmitter is corrected to 0 flow.

[0062] When the first ratio and the second ratio are greater than the first uncertainty and less than or equal to the sixth uncertainty, or when the fourth ratio is greater than the third uncertainty and less than or equal to the seventh uncertainty and the second ratio is greater than the first uncertainty and less than or equal to the sixth uncertainty, after determining that the system status is normal, the reference positions of the first wide-range transmitter and the second wide-range transmitter are calibrated.

[0063] For example, based on the uncertainty of the full channel, the system uncertainty is further considered. That is, the system uncertainty is added to the uncertainty of the first channel to obtain the sixth uncertainty. The error sources of the system uncertainty can include errors caused by mechanical vibration, power supply fluctuations, and common-mode interference. The system uncertainty can be obtained based on the root mean square of each corresponding error source. The sixth uncertainty ε6 can be calculated based on the root mean square of the uncertainty of the full channel and the system uncertainty. For transmitter N, the system uncertainty is added to the uncertainty of the full channel (i.e., the third uncertainty) to obtain the seventh uncertainty ε7.

[0064] Accordingly, in or If the WA transmitter and WB transmitter are faulty, such as abnormal power supply or blocked pressure pipe, etc., diagnose the system status and eliminate the hardware fault to confirm that the system status is normal. Then calibrate the reference position of the WA transmitter and WB transmitter to avoid automatic correction to cover up the real problem and cause subsequent control failure.

[0065] When the first ratio is greater than the sixth uncertainty and the second ratio is greater than the sixth uncertainty, the first wide-range transmitter and the second wide-range transmitter are calibrated based on the uncertainty of the wide-range transmitter and the channel uncertainty; or when the fourth ratio is greater than the seventh uncertainty, the narrow-range transmitter is calibrated based on the uncertainty of the narrow-range transmitter and the channel uncertainty.

[0066] For example, when the first ratio and the second ratio are larger, they exceed the sixth uncertainty; or when the fourth ratio is larger, it exceeds the seventh uncertainty, that is, or When calibrating, the transmitter and channel are calibrated according to the uncertainty of the transmitter and the uncertainty of the channel respectively.

[0067] For example, the error sources of transmitter uncertainty include sensor nonlinearity, temperature drift and aging, and the error sources of channel uncertainty include cable interference, DC-AC conversion error and isolation barrier distortion. If the first ratio and the second ratio are large, it means that the output value error of the transmitter is large, and the transmitter and channel are corrected respectively; thereby reducing the impact of abnormalities in the transmitter body or channel on measurement accuracy.

[0068] Through the above calibration of the transmitter reference position, the influence of the nonlinear deviation of the dual sensors can be effectively corrected. Through automatic zero point correction based on the zero flow state and the introduction of multiple uncertainty judgment bases, the sensitivity of the flow rate to the differential pressure value caused by the square root operation can be greatly improved, effectively improving the measurement accuracy at low flow rates.

[0069] S202 : In a target measuring range of the system, obtaining measurement difference values ​​of the calibrated first wide-range transmitter and the second wide-range transmitter relative to a reference value.

[0070] In the embodiment of the present application, the system target range segment corresponds to the low flow stage of the system, such as Figure 3The 0-10% and 10-25% range segments are shown. For the low flow stage, based on a preset sliding time window (e.g., 60 seconds), the measurement values ​​of the first wide-range transmitter and the second wide-range transmitter within the time window are collected, as well as the measurement values ​​and thermal balance flow values ​​of the calibrated narrow-range transmitter. The measurement values ​​and thermal balance flow values ​​of the narrow-range transmitter are used as reference values ​​for different range segments. Based on the measurement values ​​of the first wide-range transmitter and the second wide-range transmitter in different range segments, the measurement difference values ​​relative to the reference values ​​of the corresponding range segments are calculated.

[0071] Among them, the heat balance flow value is the theoretical matching value when the feed water flow and steam flow in the evaporator reach energy conservation, which can be calculated based on the energy conservation principle of the primary and secondary circuits of the nuclear power unit.

[0072] In some embodiments, the reference value includes a narrow-range measurement value of the narrow-range transmitter and a thermal equilibrium flow value; in the target range of the system, obtaining measurement difference values ​​of the calibrated first wide-range transmitter and the second wide-range transmitter relative to the reference value, respectively, includes:

[0073] In the first range segment, the first difference value and the second difference value of the measurement values ​​of the calibrated first wide-range transmitter and the second wide-range transmitter relative to the narrow-range measurement value are obtained respectively; in the second range segment, the third difference value and the fourth difference value of the calibrated first wide-range transmitter and the second wide-range transmitter relative to the thermal balance flow value are obtained respectively.

[0074] The measured difference values ​​include a first difference value, a second difference value, a third difference value, and a fourth difference value, and the system target range segment includes a first range segment and a second range segment.

[0075] For example, the first range segment may correspond to a low flow segment of 0-10% of the range, and the second range segment may correspond to a transition segment of 10-25% of the range.

[0076] For the first range segment (0-10% range), calculate the first difference value between the measurement value of the first wide-range transmitter and the measurement value of the narrow-range transmitter within the time window, and the second difference value between the measurement value of the second wide-range transmitter and the measurement value of the narrow-range transmitter. For example, the first difference value ∈ is calculated by the following expression: 1A and the second difference value ∈ 1B :

[0077]

[0078] Among them, in a range section, I WA (t) is the measurement value corresponding to the first wide-range transmitter, I WB (t) is the measurement value corresponding to the second wide range transmitter, I N(t) is the narrow-range measurement value obtained based on the narrow-range transmitter, t is the time when the data is collected in the time window, and n is the number of data collected in the time window.

[0079] For the second range segment (10-25% range), calculate the third difference value between the measurement value of the first wide range transmitter and the thermal equilibrium flow value within the time window, and the fourth difference value between the measurement value of the second wide range transmitter and the thermal equilibrium flow value. For example, the first difference value ∈ is calculated by the following expressions: 2A and the second difference value ∈ 2B :

[0080]

[0081] Among them, in the second range section, in the first range section, I WA (t) is the measurement value corresponding to the first wide-range transmitter, I WB (t) is the measurement value corresponding to the second wide range transmitter, I B (t) is the thermal equilibrium flow rate value.

[0082] It should be noted that the above I WA (t), I WB (t) and I N (t) are the current values, the differential pressure values ​​(such as Δp) measured by the first wide-range transmitter, the second wide-range transmitter and the narrow-range transmitter respectively. cA ,Δp cB and Δp N ) linear conversion is obtained, and there is a one-to-one linear conversion relationship between the current value and the differential pressure value; for example, Among them, Δp is the differential pressure value measured by the differential pressure flow transmitter, Δp m is the full-scale differential pressure value of the differential pressure flow transmitter, I(t) is the current value corresponding to the measured differential pressure value, and I min is the minimum current value corresponding to the differential pressure value of 0, I max It is the maximum current value corresponding to the full-scale differential pressure value.

[0083] S203 : When the measurement difference value is greater than a preset comprehensive uncertainty, a first flow correction value of the first wide-range transmitter and a second flow correction value of the second wide-range transmitter are calculated based on a flow compensation model.

[0084] The flow compensation model includes a polynomial compensation model and a linear-nonlinear hybrid model for respectively calculating different range segments in the system target range segment.

[0085] In an embodiment of the present application, the comprehensive uncertainty includes a first comprehensive uncertainty corresponding to the first range segment and a second comprehensive uncertainty corresponding to the second range segment; the first comprehensive uncertainty is the comprehensive uncertainty of the first wide-range transmitter and the narrow-range transmitter; the second comprehensive uncertainty is the comprehensive uncertainty of the first wide-range transmitter and the thermal balance flow measurement.

[0086] Exemplarily, when the first difference value is greater than the first comprehensive uncertainty, the calibration process of the first wide-range transmitter is triggered, and the flow correction value of the first wide-range transmitter is calculated based on the flow compensation model; when the second difference value is greater than the first comprehensive uncertainty, the calibration process of the second wide-range transmitter is triggered, and the flow correction value of the second wide-range transmitter is calculated based on the flow compensation model.

[0087] For example, since the accuracy of thermal balance measurement is higher than the measurement accuracy of the WA transmitter and the WB transmitter, when comparing the third difference value and the fourth difference value with the second comprehensive uncertainty, the ratio of the third difference value and the fourth difference value to the current range interval can be further calculated, and compared with the second comprehensive uncertainty based on the ratio. When the ratio is greater than the second comprehensive uncertainty, the calibration process of the first wide-range transmitter and the second wide-range transmitter is triggered, and the flow correction values ​​of the first wide-range transmitter and the second wide-range transmitter are calculated respectively based on the flow compensation model.

[0088] Accordingly, if Figure 3 As shown, for the first range (0-10% range), the flow compensation model used is a polynomial compensation model, and for the second range (10-25% range), the flow compensation model used is a linear-nonlinear hybrid model. The segmented calibration process can reduce the amount of calculation and improve calculation efficiency.

[0089] In some embodiments, when the measurement difference value is greater than a preset comprehensive uncertainty, calculating a first flow correction value of the first wide-range transmitter and a second flow correction value of the second wide-range transmitter based on the flow compensation model includes:

[0090] In the first range segment, when the first difference value is greater than the fourth uncertainty, the first flow correction value for the first wide-range transmitter is calculated based on the polynomial compensation model. When the second difference value is greater than the fourth uncertainty, the second flow correction value for the second wide-range transmitter is calculated based on the polynomial compensation model. In the second range segment, when the ratio of the third difference value to the current range interval is greater than the fifth uncertainty, the first flow correction value for the first wide-range transmitter is calculated based on the linear-nonlinear hybrid model. When the ratio of the fourth difference value to the current range interval is greater than the fifth uncertainty, the second flow correction value for the second wide-range transmitter is calculated based on the linear-nonlinear hybrid model.

[0091] Exemplarily, the fourth uncertainty ε4 (ie, the first combined uncertainty mentioned above) is the combined uncertainty of the WA transmitter and the N transmitter, and the fifth uncertainty ε5 (ie, the second combined uncertainty mentioned above) is the combined uncertainty of the WA transmitter and the thermal balance flow measurement.

[0092] For example, Figure 3 As shown, in the first range, in ∈ 1A >ε4, trigger the calibration process of WA transmitter; at ∈ 1B >ε4, the calibration process of the WB transmitter is triggered; in the second range, When , the calibration process of WA transmitter is triggered; , triggers the calibration process of the WB transmitter.

[0093] Accordingly, for the first measuring range, a polynomial compensation model is introduced to calculate the first flow correction value and the second flow correction value; wherein, the expression of the polynomial compensation model is expressed as follows:

[0094]

[0095] Among them, based on the calibration data, the objective function is established and the coefficients α are solved by nonlinear regression. 1A , α 2A , α 1B , α 2B ; The objective function is expressed as follows:

[0096]

[0097] Among them, Q WA Q is the first flow correction value after compensation of the first wide range transmitter; WB is the second flow correction value after compensation of the second wide range transmitter; f A is the flow coefficient of the first wide range transmitter; f B is the flow coefficient of the second wide range transmitter; Δp cA is the differential pressure measured by the first wide range transmitter; Δp cB The differential pressure measured by the second wide range transmitter; Δp m is the full-scale differential pressure value of the wide-range transmitter (i.e. the differential pressure corresponding to the maximum range); α 1A , α 2A , α 1B , α 2B are the polynomial compensation coefficients respectively; represents the flow rate standard value in the i-th group of calibration data corresponding to the first wide-range transmitter; is the flow standard value in the i-th group of calibration data corresponding to the second wide-range transmitter; represents the differential pressure value measured by the first wide-range transmitter in the i-th group of calibration data; Indicates the differential pressure value measured by the second wide range transmitter in the i-th group of calibration data; the calibration data is the actual flow value (such as and ) and the differential pressure value output by the differential pressure flow transmitter (such as and ) is used to determine the flow coefficient (such as f A and f B ), and by fitting polynomial compensation coefficients (such as α 1A , α 2A , α 1B , α 2B ); thereby minimizing the error between the model calculated value and the actual value.

[0098] For example, for the second measuring range, a linear-nonlinear hybrid model is introduced to calculate the first flow correction value and the second flow correction value; wherein, the expression of the linear-nonlinear hybrid model is expressed as follows:

[0099]

[0100] Based on the linear-nonlinear hybrid model, the first flow correction value and the second flow correction value are calculated respectively, where Δp c It can be respectively the differential pressure value measured by the first wide range transmitter and the second wide range transmitter, k2 is the instrument coefficient corresponding to the first wide range transmitter and the second wide range transmitter respectively; b is the compensation parameter; Q f The first flow correction value and the second flow correction value calculated for compensation are used.

[0101] In addition, for a high flow range (such as 25-100% of the range), the flow value can be obtained based on the square root operation of the Bernoulli equation.

[0102] S204 , when the relative error between the first flow correction value and the second flow correction value is within a preset cross comparison standard, calculating the flow compensation value of the wide-range transmitter based on the collaborative compensation model.

[0103] In an embodiment of the present application, the collaborative compensation model is used to comprehensively calculate the final flow compensation value when the error between the first flow correction value and the second flow correction value meets a preset cross-comparison standard to improve the flow measurement accuracy.

[0104] Exemplarily, the preset cross comparison standard is determined based on the first uncertainty, such as the cross comparison standard ε2 = [δ(FS) / ε1-2]×ε1, where δ(FS) is the maximum deviation of the full scale. Figure 3 As shown, in When the redundant flow measurement transmitter is used, the coordinated compensation calculation is performed to improve the flow accuracy. S is the flow range interval. When , no redundant stray measurement transmitter collaborative compensation is performed to prevent the impact of a single sensor failure on the measurement.

[0105] In some embodiments, calculating a flow compensation value for a wide-range transmitter based on a collaborative compensation model includes:

[0106] A compensation function of the collaborative compensation model is constructed based on the first flow correction value, the second flow correction value, the corresponding first weight and second weight, and the coupling term coefficient; the first weight and second weight of the compensation function are calculated based on the first signal-to-noise ratio and the first short-term stability of the first wide-range transmitter and the second signal-to-noise ratio and the second short-term stability of the second wide-range transmitter; and the flow compensation value of the wide-range transmitter is calculated based on the compensation function.

[0107] Exemplarily, based on the complementarity of dual sensor data, a compensation function is constructed:

[0108] Q c =αQ WA +βQ WB +γ(Q WA -Q WB ) 2

[0109] Among them, α and β are the weight coefficients of the mutually redundant WA transmitter and WB transmitter, α + β = 1; γ is the nonlinear coupling term coefficient, which is used to correct the cross-term error and is obtained by fitting the calibration data.

[0110] The weighting coefficients are calculated based on the signal-to-noise ratio (SNR) and short-term stability (SS) of the WA transmitter and the WB transmitter. For example, the weighting coefficients α and β are calculated using the following expressions:

[0111] or

[0112] β=1-α

[0113] Among them, the signal-to-noise ratio reflects the ratio of useful information to noise in the signal. In the calculation process of the weight coefficient, the data provided by the flow transmitter with a high signal-to-noise ratio is more reliable, and thus a higher weight coefficient is given; short-term stability is an indicator to measure the output consistency of the flow transmitter in a short period of time. The data provided by the flow transmitter with good stability in a short period of time has small fluctuations and is more reliable.

[0114] In an embodiment of the present application, a dual-source cross-validation architecture is adopted, and collaborative measurement is performed based on mutually redundant transmitters (WA and WB) and narrow-range transmitters. The measurement accuracy is improved by comparing data with each other and calculating coupling error compensation. Through automatic calibration of the reference position, multiple uncertainty threshold criteria are introduced to effectively correct the influence of nonlinear deviations existing in the mutually redundant transmitters WA and WB, improve the influence of the sensitivity of Q on the differential pressure caused by the square root operation, and effectively improve the measurement accuracy at low flow rates. The parameter real-time optimization coefficient is based on sliding time window statistics to adapt to slowly changing factors such as sensor aging and dirt deposition in the transmitter, compensate for real-time drift, and improve the reliability of the evaporator water level control system without manual intervention, thereby reducing the evaporator water level disturbance caused by flow measurement deviation, significantly reducing the risk of automatic reactor shutdown caused by flow measurement abnormality, and ensuring the safe and stable operation of the nuclear power unit. The system has good versatility and can be applied to multi-base nuclear power units.

[0115] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0116] Corresponding to the compensation method of the differential pressure flow transmitter provided in the above embodiment, as Figure 4 As shown, this is a structural diagram of the compensation device of the differential pressure flow transmitter provided in an embodiment of the present application. For the sake of convenience, only the parts related to the embodiment of the present application are shown.

[0117] The compensation device of the differential pressure flow transmitter is applied to the differential pressure flow transmitter, which includes a wide-range transmitter; the wide-range transmitter includes a first wide-range transmitter and a second wide-range transmitter that are redundant with each other, and the device includes:

[0118] The reference calibration unit 41 is used to calibrate the reference positions of the first wide-range transmitter and the second wide-range transmitter under the system zero flow state;

[0119] The deviation detection unit 42 is used to obtain the measurement difference values ​​of the calibrated first wide-range transmitter and the second wide-range transmitter relative to the reference value in the target range of the system;

[0120] a preliminary correction unit 43 for calculating a first flow correction value of the first wide-range transmitter and a second flow correction value of the second wide-range transmitter based on a flow compensation model when the measurement difference value is greater than a preset comprehensive uncertainty;

[0121] a collaborative compensation unit 44 for calculating a flow compensation value for the wide-range transmitter based on a collaborative compensation model when a relative error between the first flow correction value and the second flow correction value is within a preset cross-comparison standard;

[0122] The flow compensation model includes a polynomial compensation model and a linear-nonlinear hybrid model for respectively calculating different range segments in the system target range segment.

[0123] In a possible implementation, the above units are used to implement the steps in the above method embodiments.

[0124] Figure 5 A schematic diagram of the hardware structure of the electronic device 5 is shown.

[0125] like Figure 5 As shown, the electronic device 5 of this embodiment includes: at least one processor 51 ( Figure 5 Only one is shown), a memory 52, wherein the memory 52 stores a computer program 53 that can be run on the processor 51. When the processor 51 executes the computer program 53, the steps in the above method embodiment are implemented, for example Figure 1 Alternatively, the processor 51 implements the functions of the modules / units in the above-mentioned device embodiments when executing the computer program 53. The electronic device 5 may be the cloud server in the above-mentioned embodiment.

[0126] It should be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the electronic device 5. In other embodiments of the present application, the electronic device 5 may include more or fewer components than shown, or may combine or separate certain components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0127] The electronic device 5 may include, but is not limited to, a processor 51 and a memory 52. ​​Those skilled in the art will appreciate that Figure 5 It is only an example of the electronic device 5 and does not constitute a limitation of the electronic device 5. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the server may also include an input sending device, a network access device, a bus, etc.

[0128] The processor 51 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0129] The processor 51 may also include a memory for storing instructions and data. In some embodiments, the memory in the processor 51 is a cache memory. This memory can store instructions or data that the processor 51 has just used or is reusing. If the processor 51 needs to use the instruction or data again, it can directly call it from the memory. This avoids repeated accesses, reduces the processor 51's waiting time, and thus improves system efficiency.

[0130] In some embodiments, the memory 52 may be an internal storage unit of the electronic device 5, such as a hard drive or memory of the electronic device 5. The memory 52 may also be an external storage device of the electronic device 5, such as a plug-in hard drive, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc. equipped on the electronic device 5. Furthermore, the memory 52 may include both an internal storage unit of the electronic device 5 and an external storage device. The memory 52 is used to store an operating system, application programs, a boot loader, data, and other programs, such as the program code of a computer program. The memory 52 may also be used to temporarily store data that has been sent or is about to be sent.

[0131] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0132] It should be noted that the structure of the above-mentioned electronic device is only illustrative, and based on different application scenarios, it may also include other physical structures, and the physical structure of the electronic device is not limited here.

[0133] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0134] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it can implement the steps in the above-mentioned various method embodiments.

[0135] An embodiment of the present application provides a computer program product. When the computer program product runs on a server, the server can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0136] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. Computer-readable media may include: any entity or device that can carry computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0137] The electronic device, computer storage medium, and computer program product provided in the above-mentioned embodiments of the present application are all used to execute the methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects corresponding to the methods provided above, and will not be repeated here.

[0138] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0139] It should be understood that the above is only to help those skilled in the art better understand the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. Based on the above examples given, those skilled in the art can obviously make various equivalent modifications or changes. For example, certain steps in each embodiment of the above detection method may be unnecessary, or certain new steps may be added. Or a combination of any two or any multiple embodiments described above. Such modifications, changes, or combined solutions also fall within the scope of the embodiments of the present application.

[0140] It should also be understood that the division of the modes, situations, categories and embodiments in the embodiments of the present application is only for the convenience of description and should not constitute a special limitation. The features of various modes, categories, situations and embodiments can be combined without contradiction.

[0141] It should also be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0142] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0143] In the embodiments provided in this application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely illustrative. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0144] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0145] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

[0146] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A compensation method for a differential pressure flow transmitter, characterized in that: Applied to a differential pressure flow transmitter, the differential pressure flow transmitter includes a wide-range transmitter; the wide-range transmitter includes a first wide-range transmitter and a second wide-range transmitter that are redundant with each other; the method includes: Under a system zero flow state, calibrating the reference positions of the first wide-range transmitter and the second wide-range transmitter; In the target range of the system, obtaining measurement difference values ​​of the calibrated first wide-range transmitter and the second wide-range transmitter relative to reference values ​​respectively; When the measurement difference value is greater than a preset comprehensive uncertainty, calculating a first flow correction value of the first wide-range transmitter and a second flow correction value of the second wide-range transmitter based on a flow compensation model; calculating a flow compensation value for the wide-range transmitter based on a collaborative compensation model when a relative error between the first flow correction value and the second flow correction value is within a preset cross-comparison standard; The flow compensation model includes a polynomial compensation model and a linear-nonlinear hybrid model respectively corresponding to different range segments in the target range segment of the system.

2. The method according to claim 1, characterized in that The step of calibrating the reference positions of the first wide-range transmitter and the second wide-range transmitter under a system zero flow state includes: Under a system zero flow state, obtaining a first offset of the first wide-range transmitter and a second offset of the second wide-range transmitter; When the first offset and the second offset satisfy a preset uncertainty, the reference positions of the first wide-range transmitter and the second wide-range transmitter are calibrated.

3. The method according to claim 2, characterized in that The differential pressure flow transmitter further includes a narrow range transmitter; and the method further includes: Under a system zero flow state, obtaining a third offset of the narrow-range transmitter; When the third offset satisfies the preset uncertainty, calibrating the reference position of the narrow-range transmitter; The calibrated narrow-range transmitter is used to measure the reference value.

4. The method according to claim 3, characterized in that Obtaining a first offset of the first wide-range transmitter, a second offset of the second wide-range transmitter, and a third offset of the narrow-range transmitter includes: At the same sampling time, obtaining a first flow sampling value of the first wide-range transmitter, a second flow sampling value of the second wide-range transmitter, and a third flow sampling value of the narrow-range transmitter; Calculating the first offset based on the first flow sampling value and the number of sampling points in a sampling period; Calculating the second offset based on the second flow sampling value and the number of sampling points in a sampling period; The third offset is calculated based on the third flow sampling value and the number of sampling points in a sampling period.

5. The method according to claim 3, characterized in that When the first offset, the second offset, and the third offset satisfy a preset uncertainty, calibrating the reference positions of the first wide-range transmitter, the second wide-range transmitter, and the narrow-range transmitter includes: Calculating a first ratio, a second ratio, a third ratio, and a fourth ratio of the first offset, the second offset, the difference between the first offset and the second offset, and the third offset relative to a current range interval, respectively; When the first ratio and the second ratio are respectively less than or equal to a first uncertainty, and the third ratio is less than or equal to a second transmitter worse comparison standard, calibrating the reference positions of the first wide-range transmitter and the second wide-range transmitter; When the fourth ratio is less than or equal to a third uncertainty, calibrating the reference position of the narrow range transmitter; When the first ratio and the second ratio are greater than the first uncertainty and less than or equal to the sixth uncertainty, or when the fourth ratio is greater than the third uncertainty and less than or equal to the seventh uncertainty, and the second ratio is greater than the first uncertainty and less than or equal to the sixth uncertainty, after determining that the system state is normal, calibrate the reference positions of the first wide-range transmitter and the second wide-range transmitter; When the first ratio is greater than the sixth uncertainty and the second ratio is greater than the sixth uncertainty, the first wide-range transmitter and the second wide-range transmitter are calibrated based on the uncertainty of the wide-range transmitter and the channel uncertainty; or when the fourth ratio is greater than the seventh uncertainty, the narrow-range transmitter is calibrated based on the uncertainty of the narrow-range transmitter and the channel uncertainty.

6. The method according to claim 1, wherein The differential pressure flow transmitter further includes a narrow-range transmitter, and the reference value includes a reference value and a thermal equilibrium flow value of the narrow-range transmitter. The step of obtaining, in the target range of the system, measurement difference values ​​of the calibrated first wide-range transmitter and the second wide-range transmitter relative to the reference value, respectively, includes: In a first measuring range, obtaining a first difference value and a second difference value of the calibrated measurement values ​​of the first wide-range transmitter and the second wide-range transmitter relative to the narrow-range measurement value, respectively; In the second measuring range, obtaining a third difference value and a fourth difference value of the measured values ​​of the first wide-range transmitter and the second wide-range transmitter after calibration relative to the thermal equilibrium flow value, respectively; The measurement difference values ​​include the first difference value, the second difference value, the third difference value, and the fourth difference value, and the system target range segment includes the first range segment and the second range segment.

7. The method according to claim 6, characterized in that When the measurement difference value is greater than a preset comprehensive uncertainty, calculating a first flow correction value of the first wide-range transmitter and a second flow correction value of the second wide-range transmitter based on a flow compensation model includes: In the first measuring range, when the first difference value is greater than the fourth uncertainty, a first flow correction value of the first wide-range transmitter is calculated based on the polynomial compensation model; when the second difference value is greater than the fourth uncertainty, a second flow correction value of the second wide-range transmitter is calculated based on the polynomial compensation model; In the second range segment, when the ratio of the third difference value to the current range interval is greater than the fifth uncertainty, the first flow correction value of the first wide-range transmitter is calculated based on the linear-nonlinear hybrid model; when the ratio of the fourth difference value to the current range interval is greater than the fifth uncertainty, the second flow correction value of the second wide-range transmitter is calculated based on the linear-nonlinear hybrid model.

8. The method according to any one of claims 1 to 7, characterized in that The calculating the flow compensation value of the wide-range transmitter based on the collaborative compensation model includes: Constructing a compensation function of the collaborative compensation model based on the first flow correction value, the second flow correction value, the corresponding first weight and second weight, and a coupling term coefficient; calculating the first weight and the second weight of the compensation function based on a first signal-to-noise ratio and a first short-term stability of the first wide-range transmitter and a second signal-to-noise ratio and a second short-term stability of the second wide-range transmitter; Based on the compensation function, a flow compensation value of the wide-range transmitter is calculated.

9. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method according to any one of claims 1 to 8 is implemented.

10. A computer program product, characterized in that When the computer program product is run on a device, the device is caused to execute the method according to any one of claims 1 to 8.

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