A temperature measurement method and device for high pressure environment

Abstract

The present invention provides a temperature measurement method and device for use in a high-voltage environment, belonging to the field of temperature measurement technology, and specifically comprising: taking the phase corresponding to a temperature measurement device that meets the comprehensive measurement reliability requirements as a reference measurement phase, determining the measurement accuracy of different reference measurement phases based on the temperature deviation between different phases under different magnetic field strength intervals, and determining the reliability coefficient of the reference measurement phase and the reference phase through the measurement accuracy and measurement reliability of the reference measurement phase, obtaining the temperature measurement result of the transformer through the temperature measurement device of the reference phase, and determining whether it is necessary to turn on the temperature measurement devices of other phases through the reliability coefficient of the temperature measurement device of the reference phase and the deviation from the standby temperature measurement device turned on at a preset period, thereby improving the measurement accuracy on the basis of reducing the measurement energy consumption of the temperature measurement device.

Description

Technical Field

[0001] The present invention belongs to the technical field of temperature measurement, and in particular relates to a temperature measurement method and device used in a high-pressure environment. Background Art

[0002] In order to ensure the operational reliability of electrical equipment, such as large generator stators, transformer windings and cores, the temperature is generally measured by thermal resistors due to the insufficient accuracy of traditional thermocouple temperature measurement. However, the power consumption of thermal resistors is too large. At the same time, during operation, electromagnetic interference may cause the measurement accuracy to be difficult to meet the requirements. Therefore, how to ensure the measurement accuracy of thermal resistors of high-voltage electrical equipment while reducing the power consumption of thermal resistors has become a technical problem that needs to be solved urgently.

[0003] In order to solve the above technical problems, the existing technical solution in the invention patent CN201921836002.9 "A low-power power transformer load rate identification device" realizes the non-destructive detection of the shell temperature and vibration of the power transformer through the setting of a low-power electronic device, and makes the measurement power consumption small, which can maintain the normal operation of the circuit system for a long time, but there are the following technical problems:

[0004] In existing three-phase transformers, temperature measuring devices are often provided on the iron cores of different phases. In actual operation, the operating power of different phases is often kept consistent, so the temperature deviations of different phases are all within a preset range. Therefore, if the number of openings cannot be determined based on the measurement reliability of the temperature measuring devices of the iron cores of different phases, the monitoring power consumption will increase.

[0005] In the prior art solutions, generally, multiple measuring devices based on thermal resistors are often arranged on the same transformer core. In the prior art solutions, when there is a measurement problem with the measured temperature of a certain thermal resistor, manual switching to other temperature measuring devices is often performed, which not only leads to poor measurement accuracy, but also cannot guarantee the measurement accuracy of the temperature measuring device.

[0006] In view of the above technical problems, the present invention provides a temperature measurement method and device for use in a high-pressure environment. Summary of the invention

[0007] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0008] According to one aspect of the present invention, a temperature measurement method for use in a high pressure environment is provided.

[0009] A temperature measurement method for a high pressure environment, comprising:

[0010] S1 determines the temperature measurement data of different phases under different magnetic field strengths based on the temperature measurement data of the transformer under different operating loads, and determines the measurement reliability of the temperature measurement device of different phases under different magnetic field strength intervals through the temperature measurement data of different phases and the temperature deviation of the standby temperature measurement device;

[0011] S2 determines the comprehensive measurement reliability of the temperature measurement devices of different phases according to the measurement reliability of the temperature measurement devices of different phases under different magnetic field strength intervals, and takes the phase corresponding to the temperature measurement device that meets the requirement of the comprehensive measurement reliability as the reference measurement phase;

[0012] S3: determining the measurement accuracy of different reference measurement phases based on the temperature deviation between different phases in different magnetic field strength intervals, and determining the reliability coefficient of the reference measurement phase and the reference phase through the measurement accuracy and comprehensive measurement reliability of the reference measurement phase;

[0013] S4 obtains the temperature measurement result of the transformer through the temperature measurement device of the reference phase, and determines whether it is necessary to turn on the temperature measurement devices of other phases through the reliability coefficient of the temperature measurement device of the reference phase and the deviation from the standby temperature measurement device turned on in a preset period.

[0014] The beneficial effects of the present invention are:

[0015] 1. In the present invention, the phase corresponding to the temperature measurement device with comprehensive measurement reliability is used to determine the reference measurement phase, so that a more reliable reference measurement phase can be determined from the perspective of the measurement reliability of the temperature measurement device under different magnetic field strengths, which also lays a foundation for the screening of the reference phase and also realizes the accurate evaluation of the influence of different magnetic field strengths on the measurement reliability of the temperature measurement device.

[0016] 2. In the present invention, the reliability coefficient of the reference measurement phase and the reference phase are determined by the measurement accuracy and comprehensive measurement reliability of the reference measurement phase, taking into account the difference in comprehensive measurement reliability of different reference measurement phases due to the difference in their own measurement reliability under different magnetic field strengths, while also taking into account the deviation between other phases to achieve the determination of the reference phase with higher measurement accuracy, thereby achieving the screening of the reference phase with higher comprehensive measurement accuracy from multiple angles.

[0017] 3. In the present invention, whether it is necessary to turn on the temperature measuring devices of other phases is determined by the reliability coefficient of the temperature measuring device of the reference phase and the deviation from the standby temperature measuring device turned on in a preset period, thereby reducing the number of unnecessary temperature measuring devices turned on and reducing the monitoring power consumption. At the same time, through the judgment of the reliability coefficient and the deviation, the technical problem of low measurement accuracy of the transformer temperature caused by not turning on for a long time is avoided.

[0018] A further technical solution is to determine the temperature measurement data of different phases under different magnetic field strengths based on the temperature measurement data of the transformer under different operating loads, specifically including:

[0019] The magnetic field strength of the transformer under different operating loads is determined by the operating load and rated voltage of the transformer, and temperature measurement data of different phases under different magnetic field strengths are determined according to the magnetic field strength under different operating loads.

[0020] A further technical solution is that the phases of the transformer include A phase, B phase and C phase.

[0021] A further technical solution is that the temperature measuring device and the backup temperature measuring device are constructed by thermal resistors.

[0022] A further technical solution is to determine the reference phase by measuring the accuracy and reliability of the reference measurement phase, specifically including:

[0023] The reliability coefficient of the reference measurement phase is determined by the measurement accuracy and measurement reliability of the reference measurement phase, and the reference measurement phase with the largest reliability coefficient is used as the reference phase.

[0024] A further technical solution is to determine whether it is necessary to turn on the temperature measuring devices of other phases by using the reliability coefficient of the temperature measuring device of the reference phase and the deviation from the standby temperature measuring device turned on at a preset period, specifically including:

[0025] The opening period of the temperature measuring devices of other phases is determined by the reliability coefficient of the temperature measuring device of the reference phase, and the comparison period is determined according to the interval between the current moment and the most recent opening moment of the temperature measuring devices of other phases. When the length of the comparison period is not greater than the opening period:

[0026] Determine the number of comparisons and the temperature deviations at different comparison times according to the deviation between the standby temperature measuring device turned on at a preset period and the temperature measuring device of the transformer during the comparison period, determine the measurement accuracy of the temperature measuring device of the reference phase according to the number of comparisons and the temperature deviations at different comparison times, and determine the need to turn on the temperature measuring devices of other phases when the measurement accuracy does not meet the requirements;

[0027] When the duration of the comparison period is greater than the start period: it is determined that the temperature measuring devices of other phases need to be turned on.

[0028] On the other hand, the present invention provides a temperature measurement device for use in a high-pressure environment, using the above-mentioned temperature measurement method for use in a high-pressure environment, specifically comprising:

[0029] Measurement reliability assessment module, measurement phase classification module, reference phase assessment module, temperature measurement optimization module;

[0030] The measurement reliability evaluation module is responsible for determining the temperature measurement data of different phases under different magnetic field strengths based on the temperature measurement data of the transformer under different operating loads, and determining the measurement reliability of the temperature measurement devices of different phases under different magnetic field strength intervals through the temperature measurement data of different phases and the temperature deviation of the standby temperature measurement device;

[0031] The measurement phase classification module is responsible for determining the comprehensive measurement reliability of the temperature measurement devices of different phases according to the measurement reliability of the temperature measurement devices of different phases under different magnetic field strength intervals, and taking the phase corresponding to the temperature measurement device that meets the requirements as the reference measurement phase;

[0032] The reference phase evaluation module is responsible for determining the measurement accuracy of different reference measurement phases based on the temperature deviation between different phases in different magnetic field strength intervals, and determining the reliability coefficient of the reference measurement phase and the reference phase through the measurement accuracy of the reference measurement phase and the comprehensive measurement reliability;

[0033] The temperature measurement optimization module is responsible for obtaining the temperature measurement result of the transformer through the temperature measurement device of the reference phase, and determining whether it is necessary to turn on the temperature measurement devices of other phases through the reliability coefficient of the temperature measurement device of the reference phase and the deviation from the standby temperature measurement device turned on in a preset period.

[0034] Other features and advantages will be described in the following description. The objects and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and drawings.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings;

[0037] Figure 1 is a flow chart of a method for measuring temperature in a high pressure environment;

[0038] Figure 2 is a flow chart of a method for determining measurement reliability of a temperature measuring device;

[0039] Figure 3 is a flow chart of another method for determining measurement reliability of a temperature measuring device;

[0040] Figure 4 is a flow chart of a method for determining the comprehensive measurement reliability of a temperature measurement device;

[0041] Figure 5 A schematic diagram of a temperature measurement device used in high pressure environments. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0043] Generally, a plurality of measuring devices based on thermal resistors are often arranged on the same transformer core. In the prior art, when there is a measurement problem with the temperature measured by a certain thermal resistor, manual switching to other temperature measuring devices is often performed, which not only leads to poor measurement accuracy, but also fails to guarantee the measurement accuracy of the temperature measuring device.

[0044] Measurement reliability of the temperature measuring device: The measurement reliability is determined based on the proportion of temperature measurements with a temperature deviation rate greater than 5%. Specifically, if the proportion of temperature measurements with a temperature deviation rate greater than 5% is 1%, the measurement reliability of the temperature measuring device is 0.99.

[0045] Comprehensive measurement reliability of the temperature measurement device: It is determined based on the average measurement reliability of the temperature measurement device of different phases in different magnetic field strength ranges. If the measurement reliability in different magnetic field strength ranges is 0.9, 0.8, and 0.7 respectively, the comprehensive measurement reliability is 0.8, and the phase with a comprehensive measurement reliability greater than 0.7 is used as the reference measurement phase.

[0046] The measurement accuracy of the reference measurement phase is determined according to the average value of the temperature deviation rate between the reference measurement phase and other phases. Specifically, when the average value of the temperature deviation rate between the reference measurement phase and other phases is 0.05, the measurement accuracy is 0.95.

[0047] Reliability coefficient of the reference measurement phase: It is determined based on the average value of the measurement accuracy and the comprehensive measurement reliability. If the measurement accuracy is 0.9 and the comprehensive measurement reliability is 0.7, the reliability coefficient is 0.8, and the reliability coefficient not less than 0.8 is used as the reference phase.

[0048] Determine whether it is necessary to turn on the temperature measuring devices of other phases: determine the turn-on period of the temperature measuring devices of other phases by the reliability coefficient of the temperature measuring device of the reference phase, and determine the comparison period according to the interval between the current moment and the most recent turn-on moment of the temperature measuring devices of other phases. When the length of the comparison period is not greater than the turn-on period:

[0049] Determine the number of comparisons and the temperature deviations at different comparison times according to the deviation between the standby temperature measuring device turned on at a preset period and the temperature measuring device of the transformer during the comparison period, determine the measurement accuracy of the temperature measuring device of the reference phase according to the number of comparisons and the temperature deviations at different comparison times, and determine the need to turn on the temperature measuring devices of other phases when the measurement accuracy does not meet the requirements;

[0050] When the duration of the comparison period is greater than the start period: determining that the temperature measuring devices of other phases need to be turned on.

[0051] The following will further elaborate from two perspectives: method-based embodiments and system-based embodiments.

[0052] Method Example

[0053] To solve the above problems, according to one aspect of the present invention, Figure 1 As shown, a temperature measurement method for a high pressure environment is provided, which specifically includes:

[0054] S1 determines the temperature measurement data of different phases under different magnetic field strengths based on the temperature measurement data of the transformer under different operating loads, and determines the measurement reliability of the temperature measurement device of different phases under different magnetic field strength intervals through the temperature measurement data of different phases and the temperature deviation of the standby temperature measurement device;

[0055] It should be noted that determining the temperature measurement data of different phases under different magnetic field intensities based on the temperature measurement data of the transformer under different operating loads specifically includes:

[0056] The magnetic field strength of the transformer under different operating loads is determined by the operating load and rated voltage of the transformer, and temperature measurement data of different phases under different magnetic field strengths are determined according to the magnetic field strength under different operating loads.

[0057] Furthermore, the phases of the transformer include phase A, phase B and phase C.

[0058] It should be noted that the temperature measuring device and the backup temperature measuring device are constructed by thermal resistors.

[0059] In one possible embodiment, Figure 2 As shown, the method for determining the measurement reliability of the temperature measurement device in the above step S1 is:

[0060] Obtaining the temperature deviation between the temperature measuring device of the measuring phase and the standby temperature measuring device at different comparison times, and determining whether there is a comparison time at which the temperature deviation does not meet the requirement, if so, proceeding to the next step, if not, determining the measurement reliability of the temperature measuring device of the measuring phase at different magnetic field strength intervals through a preset reliability;

[0061] The number of comparisons in which the temperature deviation does not meet the requirement is taken as the number of temperature deviations, and whether the proportion of the temperature deviations is less than the preset proportion is determined. If so, the measurement reliability of the temperature measurement device of the measurement phase under different magnetic field strength intervals is determined by the preset reliability. If not, proceed to the next step.

[0062] Dividing the magnetic field strength of the transformer into a plurality of magnetic field strength intervals according to the operating data of the transformer under different operating loads, and judging whether the proportion of the number of temperature deviations in the magnetic field strength interval is less than the preset number proportion, if so, determining the measurement reliability of the temperature measurement device of the measuring phase in the magnetic field strength interval according to the preset reliability, if not, proceeding to the next step;

[0063] The number of temperature deviations within the magnetic field strength interval and the temperature deviation amounts at different temperature deviation times are obtained, and the measurement reliability of the temperature measurement device of the measurement phase within the magnetic field strength interval is determined in combination with the comparison number within the magnetic field strength interval.

[0064] Further, when the temperature deviation for this number of times is within a preset temperature deviation range, it is determined that the temperature deviation for this number of times meets the requirement.

[0065] In another possible embodiment, Figure 3 As shown, the method for determining the measurement reliability of the temperature measurement device in the above step S1 is:

[0066] S11 obtains the temperature deviation between the temperature measuring device of the measuring phase and the standby temperature measuring device at different comparison times, and takes the comparison times at which the temperature deviation does not meet the requirements as the temperature deviation times, and determines whether the proportion of the temperature deviation times is less than the preset proportion of times, if so, determines the measurement reliability of the temperature measuring device of the measuring phase at different magnetic field strength intervals by using the preset reliability, if not, proceeds to the next step;

[0067] S12 divides the magnetic field strength of the transformer into a plurality of magnetic field strength intervals according to the operating data of the transformer under different operating loads, and determines whether there is a magnetic field strength interval in which the proportion of the number of temperature deviations is greater than a preset proportion threshold, if so, proceeds to step S14, if not, proceeds to the next step;

[0068] S13 determines whether the proportion of the number of temperature deviations in the magnetic field strength interval is less than a preset number of proportions. If so, the measurement reliability of the temperature measurement device of the measurement phase in the magnetic field strength interval is determined by a preset reliability. If not, proceed to the next step.

[0069] S14 obtains the number of temperature deviations within the magnetic field strength interval and the temperature deviation amounts at different temperature deviation times, and determines the measurement reliability of the temperature measurement device of the measurement phase in the magnetic field strength interval in combination with the comparison number within the magnetic field strength interval.

[0070] S2 determines the comprehensive measurement reliability of the temperature measurement devices of different phases according to the measurement reliability of the temperature measurement devices of different phases under different magnetic field strength intervals, and takes the phase corresponding to the temperature measurement device that meets the requirement of the comprehensive measurement reliability as the reference measurement phase;

[0071] In one possible embodiment, the method for determining the comprehensive measurement reliability of the temperature measurement device in step S2 is:

[0072] Determine whether there is a magnetic field strength interval where the measurement reliability does not meet the requirement by measuring the measurement reliability of the temperature measurement device of the measuring phase under different magnetic field strength intervals, and if so, determine that the comprehensive measurement reliability of the measuring phase does not meet the requirement, and if not, proceed to the next step;

[0073] Determine the operating time and the operating time proportion in different magnetic field strength intervals according to the operating data of the transformer, determine the reliability threshold in different magnetic field strength intervals according to the operating time and the operating time proportion, and divide the magnetic field strength interval into a common magnetic field strength interval and other magnetic field strength intervals according to the reliability threshold;

[0074] The reliability threshold and the measurement reliability are used to measure the deviation of the measurement reliability of the temperature measurement device of the measurement phase in different magnetic field strength intervals from the reliability threshold, and the deviation is used as the reliability deviation. The measurement unreliable interval and the measurement reliable interval in the magnetic field strength interval are determined by the reliability deviation, and it is judged whether the number ratio of the measurement unreliable intervals in the commonly used magnetic field strength interval meets the requirements. If so, proceed to the next step; if not, it is determined that the comprehensive measurement reliability of the measurement phase does not meet the requirements;

[0075] Obtain reliability deviations of different commonly used magnetic field strength intervals, and determine the comprehensive reliability deviation of the commonly used magnetic field strength interval according to the number ratio of unreliable measurement intervals and the number ratio of reliable measurement intervals within the commonly used magnetic field strength interval and the reliability deviations of different commonly used magnetic field strength intervals; obtain reliability deviations of different other magnetic field strength intervals, and determine the comprehensive reliability deviation of the other magnetic field strength intervals according to the number ratio of unreliable measurement intervals and the number ratio of reliable measurement intervals within the other magnetic field strength interval and the reliability deviations of different other magnetic field strength intervals;

[0076] The weight values ​​of the comprehensive reliability deviation of the commonly used magnetic field strength interval and the comprehensive deviation of other magnetic field strength intervals are determined by the accumulated operating time of different commonly used magnetic field strength intervals and the accumulated operating time of different other magnetic field strength intervals, and the comprehensive measurement reliability of the temperature measurement device of the measurement phase is determined in combination with the comprehensive reliability deviation of the commonly used magnetic field strength interval and the comprehensive deviation of other magnetic field strength intervals.

[0077] Further, when the comprehensive measurement reliability of the temperature measurement device of the measurement phase is greater than a preset reliability coefficient, the measurement phase is determined to be the reference phase.

[0078] In another possible embodiment, Figure 4As shown, the method for determining the comprehensive measurement reliability of the temperature measurement device in the above step S2 is:

[0079] Determine the operating time and the operating time proportion in different magnetic field strength intervals according to the operating data of the transformer, determine the reliability threshold in different magnetic field strength intervals according to the operating time and the operating time proportion, and divide the magnetic field strength interval into a common magnetic field strength interval and other magnetic field strength intervals according to the reliability threshold;

[0080] Using the reliability threshold and the measurement reliability to measure the deviation of the measurement reliability of the temperature measurement device of the measuring phase in different magnetic field strength intervals from the reliability threshold, and using it as the reliability deviation, and determining the measurement unreliable interval and the measurement reliable interval within the magnetic field strength interval by using the reliability deviation;

[0081] Obtain reliability deviations of different commonly used magnetic field strength intervals, and determine the comprehensive reliability deviation of the commonly used magnetic field strength interval according to the number ratio of unreliable measurement intervals and the number ratio of reliable measurement intervals within the commonly used magnetic field strength interval and the reliability deviations of different commonly used magnetic field strength intervals; obtain reliability deviations of different other magnetic field strength intervals, and determine the comprehensive reliability deviation of the other magnetic field strength intervals according to the number ratio of unreliable measurement intervals and the number ratio of reliable measurement intervals within the other magnetic field strength interval and the reliability deviations of different other magnetic field strength intervals;

[0082] The weight values ​​of the comprehensive reliability deviation of the commonly used magnetic field strength interval and the comprehensive deviation of other magnetic field strength intervals are determined by the accumulated operating time of different commonly used magnetic field strength intervals and the accumulated operating time of different other magnetic field strength intervals, and the comprehensive measurement reliability of the temperature measurement device of the measurement phase is determined in combination with the comprehensive reliability deviation of the commonly used magnetic field strength interval and the comprehensive deviation of other magnetic field strength intervals.

[0083] In another possible embodiment, the method for determining the comprehensive measurement reliability of the temperature measurement device in step S2 is:

[0084] Determine the operating time and the operating time proportion in different magnetic field strength intervals according to the operating data of the transformer, determine the reliability threshold in different magnetic field strength intervals according to the operating time and the operating time proportion, and divide the magnetic field strength interval into a common magnetic field strength interval and other magnetic field strength intervals according to the reliability threshold;

[0085] Using the reliability threshold and the measurement reliability to measure the deviation of the measurement reliability of the temperature measurement device of the measuring phase in different magnetic field strength intervals from the reliability threshold, and using it as the reliability deviation, and determining the measurement unreliable interval and the measurement reliable interval within the magnetic field strength interval by using the reliability deviation;

[0086] When there is no measurement unreliable interval within the commonly used magnetic field strength interval of the measured phase, determining the measured phase as the reference phase;

[0087] When there is an unreliable measurement interval in the commonly used magnetic field strength interval of the measurement phase, the comprehensive reliability deviation amount of the commonly used magnetic field strength interval is determined according to the number ratio of the unreliable measurement intervals and the number ratio of the reliable measurement intervals in the commonly used magnetic field strength interval and the reliability deviation amounts of different commonly used magnetic field strength intervals;

[0088] When the comprehensive reliability deviation of the commonly used magnetic field strength interval of the measured phase does not meet the requirement, it is determined that the measured phase does not belong to the reference phase;

[0089] When the comprehensive reliability deviation of the commonly used magnetic field strength interval of the measurement phase does not meet the requirements, the reliability deviations of different other magnetic field strength intervals are obtained, and the comprehensive reliability deviations of the other magnetic field strength intervals are determined according to the proportion of the number of unreliable measurement intervals and the proportion of the number of reliable measurement intervals in the other magnetic field strength intervals and the reliability deviations of different other magnetic field strength intervals;

[0090] The weight values ​​of the comprehensive reliability deviation of the commonly used magnetic field strength interval and the comprehensive deviation of other magnetic field strength intervals are determined by the accumulated operating time of different commonly used magnetic field strength intervals and the accumulated operating time of different other magnetic field strength intervals, and the comprehensive measurement reliability of the temperature measurement device of the measurement phase is determined in combination with the comprehensive reliability deviation of the commonly used magnetic field strength interval and the comprehensive deviation of other magnetic field strength intervals.

[0091] S3: determining the measurement accuracy of different reference measurement phases based on the temperature deviation between different phases in different magnetic field strength intervals, and determining the reliability coefficient of the reference measurement phase and the reference phase through the measurement accuracy and comprehensive measurement reliability of the reference measurement phase;

[0092] In one possible embodiment, Figure 5 As shown, the method for determining the measurement accuracy of the reference measurement phase in the above step S3 is:

[0093] Determine the operating time and the operating time ratio in different magnetic field strength intervals according to the operating data of the transformer, and determine the weight value in different magnetic field strength intervals according to the operating time and the operating time ratio;

[0094] Determine the interval measurement accuracy of the reference measurement phase in different magnetic field intensity intervals by determining the number of temperature coincidences that the temperature deviation between the reference measurement phase and other phases in different magnetic field intensity intervals meets the requirements, the temperature deviation number of temperature coincidences that the temperature deviation does not meet the requirements, and the temperature deviation number of temperature deviations with different temperature deviations;

[0095] The measurement accuracy of the reference measurement phase is determined by using the weight values ​​in different magnetic field strength intervals and the interval measurement accuracy of the reference measurement phase in different magnetic field strength intervals.

[0096] It can be understood that the reference phase is determined by the measurement accuracy and measurement reliability of the reference measurement phase, specifically including:

[0097] The reliability coefficient of the reference measurement phase is determined by the measurement accuracy and measurement reliability of the reference measurement phase, and the reference measurement phase with the largest reliability coefficient is used as the reference phase.

[0098] S4 obtains the temperature measurement result of the transformer through the temperature measurement device of the reference phase, and determines whether it is necessary to turn on the temperature measurement devices of other phases through the reliability coefficient of the temperature measurement device of the reference phase and the deviation from the standby temperature measurement device turned on in a preset period.

[0099] It should be noted that determining whether to start the temperature measurement devices of other phases is performed based on the reliability coefficient of the temperature measurement device of the reference phase and the deviation from the standby temperature measurement device started at a preset period, specifically including:

[0100] The opening period of the temperature measuring devices of other phases is determined by the reliability coefficient of the temperature measuring device of the reference phase, and the comparison period is determined according to the interval between the current moment and the most recent opening moment of the temperature measuring devices of other phases. When the length of the comparison period is not greater than the opening period:

[0101] Determine the number of comparisons and the temperature deviations at different comparison times according to the deviation between the standby temperature measuring device turned on at a preset period and the temperature measuring device of the transformer during the comparison period, determine the measurement accuracy of the temperature measuring device of the reference phase according to the number of comparisons and the temperature deviations at different comparison times, and determine the need to turn on the temperature measuring devices of other phases when the measurement accuracy does not meet the requirements;

[0102] When the duration of the comparison period is greater than the start period: it is determined that the temperature measuring devices of other phases need to be turned on.

[0103] System Example

[0104] On the other hand, Figure 5 As shown, the present invention provides a temperature measurement device for use in a high-pressure environment, using the above-mentioned temperature measurement method for use in a high-pressure environment, specifically comprising:

[0105] Measurement reliability assessment module, measurement phase classification module, reference phase assessment module, temperature measurement optimization module;

[0106] The measurement reliability evaluation module is responsible for determining the temperature measurement data of different phases under different magnetic field strengths based on the temperature measurement data of the transformer under different operating loads, and determining the measurement reliability of the temperature measurement devices of different phases under different magnetic field strength intervals through the temperature measurement data of different phases and the temperature deviation of the standby temperature measurement device;

[0107] The measurement phase classification module is responsible for determining the comprehensive measurement reliability of the temperature measurement devices of different phases according to the measurement reliability of the temperature measurement devices of different phases under different magnetic field strength intervals, and taking the phase corresponding to the temperature measurement device that meets the requirements as the reference measurement phase;

[0108] The reference phase evaluation module is responsible for determining the measurement accuracy of different reference measurement phases based on the temperature deviation between different phases in different magnetic field strength intervals, and determining the reliability coefficient of the reference measurement phase and the reference phase through the measurement accuracy of the reference measurement phase and the comprehensive measurement reliability;

[0109] The temperature measurement optimization module is responsible for obtaining the temperature measurement result of the transformer through the temperature measurement device of the reference phase, and determining whether it is necessary to turn on the temperature measurement devices of other phases through the reliability coefficient of the temperature measurement device of the reference phase and the deviation from the standby temperature measurement device turned on in a preset period.

[0110] Through the above embodiments, the present invention achieves the following beneficial effects:

[0111] The beneficial effects of the present invention are:

[0112] 1. In the present invention, the phase corresponding to the temperature measurement device with comprehensive measurement reliability is used to determine the reference measurement phase, so that a more reliable reference measurement phase can be determined from the perspective of the measurement reliability of the temperature measurement device under different magnetic field strengths, which also lays a foundation for the screening of the reference phase and also realizes the accurate evaluation of the influence of different magnetic field strengths on the measurement reliability of the temperature measurement device.

[0113] 2. In the present invention, the reliability coefficient of the reference measurement phase and the reference phase are determined by the measurement accuracy and comprehensive measurement reliability of the reference measurement phase, taking into account the difference in comprehensive measurement reliability of different reference measurement phases due to the difference in their own measurement reliability under different magnetic field strengths, while also taking into account the deviation between other phases to achieve the determination of the reference phase with higher measurement accuracy, thereby achieving the screening of the reference phase with higher comprehensive measurement accuracy from multiple angles.

[0114] 3. In the present invention, whether it is necessary to turn on the temperature measuring devices of other phases is determined by the reliability coefficient of the temperature measuring device of the reference phase and the deviation from the standby temperature measuring device turned on in a preset period, thereby reducing the number of unnecessary temperature measuring devices turned on and reducing the monitoring power consumption. At the same time, through the judgment of the reliability coefficient and the deviation, the technical problem of low measurement accuracy of the transformer temperature caused by not turning on for a long time is avoided.

[0115] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0116] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0117] The above description is only one or more embodiments of this specification and is not intended to limit this specification. For those skilled in the art, one or more embodiments of this specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of this specification shall be included in the scope of the claims of this specification.

Claims

1. A temperature measurement method for a high pressure environment, characterized in that: Specifically include: Determine the temperature measurement data of different phases under different magnetic field strengths based on the temperature measurement data of the transformer under different operating loads, and determine the measurement reliability of the temperature measurement device of different phases under different magnetic field strength intervals through the temperature measurement data of different phases and the temperature deviation of the standby temperature measurement device; Determine the comprehensive measurement reliability of the temperature measurement devices of different phases according to the measurement reliability of the temperature measurement devices of different phases under different magnetic field strength intervals, and take the phase corresponding to the temperature measurement device that meets the requirements as the reference measurement phase; Determine the measurement accuracy of different reference measurement phases based on the temperature deviation between different phases in different magnetic field strength intervals, and determine the reliability coefficient of the reference measurement phase and the reference phase through the measurement accuracy and comprehensive measurement reliability of the reference measurement phase; The temperature measurement result of the transformer is obtained by the temperature measurement device of the reference phase, and whether the temperature measurement devices of other phases need to be turned on is determined by the reliability coefficient of the temperature measurement device of the reference phase and the deviation from the standby temperature measurement device turned on in a preset period.

2. The temperature measurement method for a high pressure environment according to claim 1, characterized in that: Determining temperature measurement data of different phases under different magnetic field strengths based on temperature measurement data of the transformer under different operating loads specifically includes: The magnetic field strength of the transformer under different operating loads is determined by the operating load and rated voltage of the transformer, and temperature measurement data of different phases under different magnetic field strengths are determined according to the magnetic field strength under different operating loads.

3. The temperature measurement method for a high pressure environment according to claim 1, characterized in that: The phases of the transformer include A phase, B phase and C phase.

4. The temperature measurement method for high pressure environment according to claim 1, characterized in that: The temperature measuring device and the backup temperature measuring device are constructed by thermal resistors.

5. The temperature measurement method for a high pressure environment according to claim 1, characterized in that: The method for determining the measurement reliability of the temperature measuring device is: Obtaining the temperature deviation between the temperature measuring device of the measuring phase and the standby temperature measuring device at different comparison times, and determining whether there is a comparison time at which the temperature deviation does not meet the requirement, if so, proceeding to the next step, if not, determining the measurement reliability of the temperature measuring device of the measuring phase at different magnetic field strength intervals through a preset reliability; The number of comparisons in which the temperature deviation does not meet the requirement is taken as the number of temperature deviations, and whether the proportion of the temperature deviations is less than the preset proportion is determined. If so, the measurement reliability of the temperature measurement device of the measurement phase under different magnetic field strength intervals is determined by the preset reliability. If not, proceed to the next step. Dividing the magnetic field strength of the transformer into a plurality of magnetic field strength intervals according to the operating data of the transformer under different operating loads, and judging whether the proportion of the number of temperature deviations in the magnetic field strength interval is less than the preset number proportion, if so, determining the measurement reliability of the temperature measurement device of the measuring phase in the magnetic field strength interval according to the preset reliability, if not, proceeding to the next step; The number of temperature deviations within the magnetic field strength interval and the temperature deviation amounts at different temperature deviation times are obtained, and the measurement reliability of the temperature measurement device of the measurement phase within the magnetic field strength interval is determined in combination with the comparison number within the magnetic field strength interval.

6. The temperature measurement method for high pressure environment according to claim 5, characterized in that: When the temperature deviation of the comparison times is within the preset temperature deviation range, it is determined that the temperature deviation of the comparison times meets the requirement.

7. The temperature measurement method for a high pressure environment according to claim 1, characterized in that: When the comprehensive measurement reliability of the temperature measurement device of the measurement phase is greater than a preset reliability coefficient, the measurement phase is determined to be the reference phase.

8. The temperature measurement method for use in a high pressure environment according to claim 1, characterized in that: The method for determining the measurement accuracy of the reference measurement phase is: Determine the operating time and the operating time ratio in different magnetic field strength intervals according to the operating data of the transformer, and determine the weight value in different magnetic field strength intervals according to the operating time and the operating time ratio; Determine the interval measurement accuracy of the reference measurement phase in different magnetic field intensity intervals by determining the number of temperature coincidences that the temperature deviation between the reference measurement phase and other phases in different magnetic field intensity intervals meets the requirements, the temperature deviation number of temperature coincidences that the temperature deviation does not meet the requirements, and the temperature deviation number of temperature deviations with different temperature deviations; The measurement accuracy of the reference measurement phase is determined by using the weight values ​​in different magnetic field strength intervals and the interval measurement accuracy of the reference measurement phase in different magnetic field strength intervals.

9. The temperature measurement method for high pressure environment according to claim 1, characterized in that: Determining the reference phase by measuring the accuracy and reliability of the reference measurement phase specifically includes: The reliability coefficient of the reference measurement phase is determined by the measurement accuracy and measurement reliability of the reference measurement phase, and the reference measurement phase with the largest reliability coefficient is used as the reference phase.

10. A temperature measurement device for use in a high-pressure environment, using a temperature measurement method for use in a high-pressure environment as claimed in any one of claims 1 to 9, characterized in that: Specifically include: Measurement reliability assessment module, measurement phase classification module, reference phase assessment module, temperature measurement optimization module; The measurement reliability evaluation module is responsible for determining the temperature measurement data of different phases under different magnetic field strengths based on the temperature measurement data of the transformer under different operating loads, and determining the measurement reliability of the temperature measurement devices of different phases under different magnetic field strength intervals through the temperature measurement data of different phases and the temperature deviation of the standby temperature measurement device; The measurement phase classification module is responsible for determining the comprehensive measurement reliability of the temperature measurement devices of different phases according to the measurement reliability of the temperature measurement devices of different phases under different magnetic field strength intervals, and taking the phase corresponding to the temperature measurement device that meets the requirements as the reference measurement phase; The reference phase evaluation module is responsible for determining the measurement accuracy of different reference measurement phases based on the temperature deviation between different phases in different magnetic field strength intervals, and determining the reliability coefficient of the reference measurement phase and the reference phase through the measurement accuracy of the reference measurement phase and the comprehensive measurement reliability; The temperature measurement optimization module is responsible for obtaining the temperature measurement result of the transformer through the temperature measurement device of the reference phase, and determining whether it is necessary to turn on the temperature measurement devices of other phases through the reliability coefficient of the temperature measurement device of the reference phase and the deviation from the standby temperature measurement device turned on in a preset period.

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