A method for acceptance of a substation temperature sensing cable

Abstract

The application discloses a kind of substation temperature sensing cable commissioning acceptance methods, and method steps are as follows: the rated action temperature value of temperature sensing cable, standard alarm length and rated response time value are collected;Temperature sensing cable is tested, response time and consistency test, signal upload integrity test and installation specification test are carried out, and corresponding test score is calculated respectively;The action temperature test score, response time and consistency test score, signal upload integrity test score and installation specification test score are weighted summation, and the commissioning acceptance test score of temperature sensing cable is calculated;And based on the commissioning acceptance test score of temperature sensing cable, the commissioning acceptance conclusion of temperature sensing cable is given.The application systematic acceptance process, the key commissioning index performance of temperature sensing cable is comprehensively evaluated, to avoid action temperature not meeting requirements, laying not in place and signal test insufficient etc., to improve the operation reliability of temperature sensing cable after commissioning.

Description

Technical Field

[0001] This invention relates to the field of power system fire protection facility acceptance technology, specifically to a method for commissioning and accepting temperature-sensing cables in substations. Background Technology

[0002] Temperature-sensing cables, as the core device for fire monitoring in substation cable tunnels, possess the ability to continuously sense temperature changes along the line. When the ambient temperature reaches a preset threshold, they can immediately output an alarm signal, thereby effectively identifying potential overheating risks and fire hazards. In substations, temperature-sensing cables are widely used in critical areas such as cable trenches and tunnels, and their functional reliability is directly related to the safe and stable operation of power facilities. However, the monitoring effectiveness of temperature-sensing cables after commissioning highly depends on the comprehensiveness and rigor of the acceptance phase.

[0003] Current industry practices lack systematic acceptance standards and operational guidelines, leading to serious deficiencies in the acceptance process performed by maintenance personnel. For example, some acceptance tests simply verify the simulated fire triggering function while neglecting the accurate measurement of the operating temperature of the heat-sensing cable, resulting in missing actual performance parameters and a lack of data support for later maintenance. Simultaneously, inspections of the cable's laying path are often perfunctory, failing to identify issues such as suspension, compression, or fire-retardant coating coverage, creating potential for false alarms and response delays. Furthermore, insufficient testing of the signal transmission link integrity, failing to verify the uploading process of fault and fire signals at each level, may prevent the central control station from receiving critical alarm information in a timely manner, delaying emergency response. These deficiencies in the acceptance process not only weaken the fire monitoring capabilities of heat-sensing cables but may also trigger cascading safety risks, threatening the overall operational safety of the substation. Therefore, a comprehensive and highly operable acceptance method is urgently needed to systematically evaluate the key operational indicators of heat-sensing cables, ensuring their stable and reliable fire monitoring function after commissioning. Summary of the Invention

[0004] The purpose of this application is to provide a method for the commissioning and acceptance of temperature sensing cables in substations. Through a systematic acceptance process, the key performance indicators of the temperature sensing cables are comprehensively evaluated, avoiding problems such as operating temperature not meeting requirements, improper laying, and insufficient signal testing, thereby improving the operational reliability of the temperature sensing cables after commissioning.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for commissioning and accepting temperature-sensing cables in substations, comprising the following steps: Step S1: Collect the rated operating temperature value, standard alarm length, and rated response time value of the temperature sensing cable; Step S2: Based on the rated operating temperature value and standard alarm length, perform an operating temperature test on the temperature sensing cable to obtain an operating temperature test score. Step S3: Based on the rated operating temperature value and rated response time value, perform response time and consistency tests on the temperature sensing cable to obtain response time and consistency test scores. Step S4: Perform a signal transmission integrity test on the temperature sensing cable and obtain the signal transmission integrity test score; Step S5: Perform an installation compliance test on the temperature sensing cable and obtain the installation compliance test score; Step S6: The scores for the action temperature test, response time and consistency test, signal transmission integrity test, and installation standardization test are weighted and summed to calculate the commissioning acceptance test score of the temperature sensing cable; and the commissioning acceptance conclusion of the temperature sensing cable is given based on the commissioning acceptance test score of the temperature sensing cable.

[0006] Further, in step S2, based on the rated operating temperature value and the standard alarm length, an operating temperature test is performed on the temperature sensing cable to obtain an operating temperature test score; the specific steps are as follows: Step S21: Mark two test segments on the temperature sensing cable, both of which are the standard alarm length, and designate them as the first test segment and the second test segment, respectively. Step S22: Place the first test section in the heating device and heat it at the first heating rate until the temperature sensing cable emits a fire alarm signal, and record the first measured operating temperature at this time. Step S23: Place the second test section in the heating device and heat it at the first heating rate until the temperature sensing cable emits a fire alarm signal, and record the second measured operating temperature at this time. Step S24: Compare the first measured operating temperature and the second measured operating temperature with the rated operating temperature value, and calculate the operating temperature test score based on the comparison results.

[0007] Further, in step S3, based on the rated operating temperature value and rated response time value, the temperature sensing cable is subjected to response time and consistency tests to obtain response time and consistency test scores; the specific steps are as follows: Step S31: Calculate the test environment temperature for the response time test based on the rated operating temperature value, wherein... , Indicates the ambient temperature of the test environment. Represents a constant greater than 1. Indicates the rated operating temperature value; Step S32: Place the first test segment in a heating device that maintains a constant temperature in the test environment, and start timing simultaneously until the temperature sensing cable emits a fire alarm signal. Record the first measured response time at this time. Step S33: Place the second test segment in a heating device that maintains a constant temperature in the test environment, and start timing simultaneously until the temperature sensing cable emits a fire alarm signal. Record the second measured response time at this time. Step S34: Compare the first measured response time and the second measured response time with the rated response time value, respectively, and calculate the difference between the first measured response time and the second measured response time. Calculate the response time and the consistency test score based on the comparison result and the difference.

[0008] Further, in step S4, a signal transmission integrity test is performed on the temperature sensing cable to obtain a signal transmission integrity test score; the specific steps are as follows: Step S41: Simulate a fault in the temperature sensing cable and sequentially check the fault indication status of the signal processing unit and the fire alarm unit; the fault component address code displayed by the fire alarm unit; the reception status of the central control station for the fault alarm information; and obtain the fault signal upload integrity test score based on the inspection results of the fault indication status, fault component address code, and reception status. Step S42: Simulate a fire in a heat-sensing cable and sequentially check the fire alarm indication status of the signal processing unit and the fire alarm unit; the fire alarm component address code displayed by the fire alarm unit; and the reception status of the central control station for the fire alarm information. Based on the inspection results of the fire alarm indication status, fire alarm component address code, and reception status, obtain the fire signal upload integrity test score. Step S43: Add the fault signal upload integrity test score to the fire signal upload integrity test score to obtain the signal upload integrity test score.

[0009] Further, in step S5, an installation compliance test is performed on the temperature sensing cable to obtain an installation compliance test score; the specific steps are as follows: Step S51: Check the laying path of the temperature sensing cable body, measure and record the suspended length, the length squeezed by the object, and the length covered by the covering. Step S52: Calculate the standardization score of the laying of the temperature sensing cable body based on the ratios of the suspended length, the length squeezed by the object, and the length covered by the covering to the total installation length of the temperature sensing cable. Step S53: Check the installation location and installation method of the temperature sensing cable accessories. The temperature sensing cable accessories include a terminal box, a signal processing unit, and an input module. Step S54: Based on the inspection results of the installation position and installation method of the temperature sensing cable accessories, calculate the installation standardization score of the temperature sensing cable accessories. Step S55: Add the score for the standardization of the laying of the temperature sensing cable body to the score for the standardization of the installation of the temperature sensing cable supporting components to obtain the installation standardization test score.

[0010] Further, in step S6, the scores for the action temperature test, response time and consistency test, signal transmission integrity test, and installation compliance test are weighted and summed to calculate the commissioning acceptance test score of the temperature-sensing cable; and based on the commissioning acceptance test score, a commissioning acceptance conclusion for the temperature-sensing cable is given; the specific steps are as follows: Step S61: Summarize the scores for the action temperature test, response time and consistency test, signal transmission integrity test, and installation compliance test. Step S62: Calculate the commissioning acceptance test score of the temperature sensing cable using the following formula: ; in, This indicates the score of the commissioning and acceptance test for the temperature-sensing cable. The weighting coefficients representing the motion temperature test scores. This indicates the score of the action temperature test. The weighting coefficients represent the response time and consistency test score. This indicates the response time and consistency test score. The weighting coefficients represent the score of the signal transmission integrity test. This indicates the score for the signal transmission integrity test. The weighting coefficients representing the installation compliance test scores. This indicates the score for the installation compliance test; , , , ,and ; Step S63: If the temperature sensing cable's commissioning acceptance test score is greater than the pass threshold, the acceptance is qualified; otherwise, the acceptance is unqualified.

[0011] Further, in step S24, calculating the action temperature test score based on the comparison result includes: First measured operating temperature Satisfying the relation And the second measured operating temperature Satisfying the relation If the temperature test result is positive, the score is 10 points; otherwise, it is 0 points. This indicates the rated operating temperature value.

[0012] Further, in step S31, the constant The value is 1.4.

[0013] Further, in step S34, calculating the response time and consistency test score based on the comparison result and the difference includes: First measured response time and the second measured response time All are not greater than the rated response time value. If the absolute value of the difference between the two is no greater than 5 seconds, then the response time and consistency test score is recorded as 10 points; the first measured response time and the second measured response time All are not greater than the rated response time value. If the response time and consistency test score is 7, then the response time and consistency test score is 0.

[0014] Furthermore, in step S52, the formula for calculating the standardization score of the temperature-sensing cable installation is as follows: ; in, This indicates the score for the standardization of the installation of the temperature sensing cable. Indicates the length of suspension. Indicates the length compressed by the object. Indicates the length covered by the covering. This indicates the total installation length of the temperature sensing cable. Attached Figure Description

[0015] Figure 1 This is a flowchart illustrating a method for commissioning and accepting temperature-sensing cables in substations, provided by the present invention. Detailed Implementation

[0016] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0017] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] The current acceptance testing of substation heat-sensing cables lacks unified standards, resulting in inconsistent acceptance quality. Specifically, the acceptance process may only test simulated fire functions while neglecting actual operating temperature testing of the heat-sensing cable, leading to missing crucial data. Furthermore, insufficient inspection of the installation quality of the heat-sensing cable and its components can easily cause false alarms or delayed alarms. In addition, inadequate testing of the signal transmission link integrity may prevent the substation control station from receiving fire alarm information in a timely manner. These problems collectively reduce the fire monitoring capabilities of heat-sensing cables, posing a potential threat to the safe and stable operation of substations.

[0019] To address this issue, this application proposes a method for the commissioning and acceptance of substation temperature-sensing cables. This method, through a systematic approach, comprehensively improves the standardization and reliability of the acceptance process. Specifically, the method first collects the rated operating temperature, standard alarm length, and rated response time of the temperature-sensing cable as benchmarks. Subsequently, it sequentially performs operating temperature tests, response time and consistency tests, signal transmission integrity tests, and installation compliance tests, obtaining corresponding test scores for each. Finally, all test scores are summarized, and a commissioning and acceptance conclusion for the temperature-sensing cable is given based on these scores. This comprehensive evaluation mechanism effectively solves various problems existing in current acceptance processes, ensuring the fire monitoring capabilities and operational reliability of the temperature-sensing cable after commissioning.

[0020] For ease of understanding, the following explains some key terms in this embodiment: A temperature-sensing cable is a linear fire detector capable of continuously detecting temperature changes along its length. When the temperature at any point along the cable reaches a preset threshold, it outputs an alarm signal. Its main function is to accurately identify overheating and fire hazards, and it is particularly suitable for temperature monitoring in narrow areas such as cable tunnels. In this embodiment, the temperature-sensing cable is a resettable, constant-temperature type.

[0021] The rated operating temperature value refers to the temperature threshold determined during the design and manufacturing of the temperature-sensing cable that triggers an alarm signal under specific conditions. This value is an important parameter for evaluating the performance of the temperature-sensing cable and serves as a benchmark for subsequent testing.

[0022] The standard alarm length refers to the minimum effective heat-exposed length required for the temperature-sensing cable to stably output an alarm signal when it reaches its rated operating temperature. This parameter ensures the reliable alarm capability of the temperature-sensing cable under localized heating conditions.

[0023] The rated response time value refers to the time required for a temperature-sensing cable to issue an alarm signal from the moment it begins to be heated under a specific ambient temperature and heating rate. This value reflects the speed at which the temperature-sensing cable responds to temperature changes and is a key indicator for evaluating its alarm timeliness.

[0024] The operating temperature test refers to simulating the heated environment of the temperature sensing cable, measuring the temperature at which it triggers an alarm signal during actual operation, and comparing it with the rated operating temperature value to evaluate the accuracy of its temperature detection.

[0025] Response time and consistency testing refers to measuring the time required for different sections of a temperature-sensing cable to emit alarm signals under specific temperature conditions, and evaluating the uniformity and stability of its response speed.

[0026] Signal upload integrity test refers to verifying whether the alarm signal emitted by the temperature sensing cable can be transmitted step by step from the field equipment to the central control station of the substation, ensuring that the alarm information can be received and processed in a timely and accurate manner.

[0027] Installation compliance testing refers to checking whether the actual installation location, fixing method, and laying path of the temperature sensing cable and its supporting components (such as terminal boxes, signal processing units, input modules, etc.) meet the relevant technical standards and design requirements, so as to avoid performance degradation or false alarms due to improper installation.

[0028] The test score is a numerical value obtained by quantitatively evaluating the performance of the temperature sensing cable in various tests, and is used to objectively reflect its performance and installation quality.

[0029] The commissioning acceptance conclusion refers to the comprehensive judgment based on the test scores obtained by the temperature sensing cable in various tests, to determine whether it meets the commissioning requirements, and to give a final judgment of qualified or unqualified.

[0030] This application provides a method for commissioning and accepting temperature-sensing cables in substations, the specific implementation of which is as follows: In step S1, the rated operating temperature, standard alarm length, and rated response time of the temperature-sensing cable are collected. These parameters are technical specifications provided by the manufacturer when the temperature-sensing cable leaves the factory and serve as the benchmark for subsequent tests. This information can be obtained, for example, by consulting the product manual, technical specifications, or the manufacturer's factory report. Alternatively, these parameters can be manually entered into the acceptance management system or record forms.

[0031] In step S2, based on the rated operating temperature value and the standard alarm length, an operating temperature test is performed on the temperature-sensing cable to obtain an operating temperature test score. This test aims to verify whether the alarm temperature of the temperature-sensing cable under actual heating conditions meets its rated value. For example, a sample of the temperature-sensing cable is randomly selected and placed in a temperature-controlled heating device, and the temperature is gradually increased while a high-precision thermometer monitors the temperature of the heating device, recording the temperature value when the temperature-sensing cable issues an alarm signal. By comparing the measured temperature with the rated operating temperature value, its accuracy can be evaluated, and a test score can be calculated according to a preset scoring standard.

[0032] In step S3, based on the rated operating temperature and rated response time, a response time and consistency test is performed on the temperature-sensing cable to obtain a response time and consistency test score. This test is used to evaluate the response speed of the temperature-sensing cable to temperature changes and the uniformity of response performance in different sections. For example, two different sections of the temperature-sensing cable can be selected and placed in a heating environment with a preset constant temperature, and a timer can be used to record the time required from the start of heating to the issuance of an alarm signal. By comparing the response times of these two sections and their differences from the rated response time value, its response performance and consistency can be evaluated, and a test score can be calculated according to a preset scoring standard.

[0033] In step S4, a signal transmission integrity test is performed on the temperature-sensing cable to obtain a signal transmission integrity test score. This test aims to verify whether the alarm signal from the temperature-sensing cable can be transmitted completely and accurately from the field equipment to the substation's central control station. For example, a fire alarm signal can be simulated at the temperature-sensing cable site, and then the indicator light status and displayed information of intermediate links such as the signal processing unit and the fire alarm unit can be checked step by step to finally confirm whether the substation's central control station has received the corresponding alarm information. Based on the integrity and accuracy of the signal transmission, the corresponding test score can be calculated.

[0034] In step S5, an installation compliance test is performed on the temperature-sensing cable to obtain an installation compliance test score. This test aims to check whether the actual installation of the temperature-sensing cable and its supporting components meets the design and specification requirements. For example, on-site inspection and visual inspection can be used to verify the laying path, fixing method, bending radius, and whether there are any issues such as compression, suspension, or covering of the temperature-sensing cable. Simultaneously, the installation positions, secure fixing, and wiring specifications of supporting components such as terminal boxes, signal processing units, and input modules are checked. Based on the inspection results, the corresponding test score can be calculated.

[0035] In step S6, the scores for the operating temperature test, response time and consistency test, signal transmission integrity test, and installation compliance test are weighted and summed to calculate the commissioning acceptance test score for the temperature-sensing cable. Based on this score, a commissioning acceptance conclusion for the temperature-sensing cable is given. This step is a comprehensive evaluation of the aforementioned test results. For example, the test scores obtained in steps S2 to S5 can be simply added together to obtain a total score. Then, this total score is compared with a passing threshold. If the total score reaches or exceeds the passing threshold, a conclusion of acceptance is given; otherwise, a conclusion of acceptance is given.

[0036] This application employs a systematic testing process to comprehensively evaluate the performance and installation quality of temperature-sensing cables during commissioning and acceptance, ensuring a standardized and quantifiable acceptance process. This effectively addresses the issues of inconsistent quality and lack of standardization in the commissioning and acceptance of temperature-sensing cables in substations, significantly improving the operational reliability and fire monitoring capabilities of these cables.

[0037] The above-mentioned solution in this application proposes an operating temperature test to evaluate the performance of the temperature sensing cable. However, in this process, there is a lack of specific testing procedures to ensure accurate measurement of the operating temperature, which may lead to inconsistent test results or missing data, affecting the reliability of acceptance and subsequent operation and maintenance.

[0038] In response, this application further proposes an action temperature testing procedure, which includes the following steps: Step S21: Mark two test segments on the temperature sensing cable, both of which are the standard alarm length, and designate them as the first test segment and the second test segment, respectively. Step S22: Place the first test section in the heating device and heat it at the first heating rate until the temperature sensing cable emits a fire alarm signal, and record the first measured operating temperature at this time. Step S23: Place the second test section in the heating device and heat it at the first heating rate until the temperature sensing cable emits a fire alarm signal, and record the second measured operating temperature at this time. Step S24: Compare the first measured operating temperature and the second measured operating temperature with the rated operating temperature value, and calculate the operating temperature test score based on the comparison results.

[0039] Specifically, in step S21, it is first necessary to identify the temperature sensing cable and obtain its rated operating temperature value from its product specifications or data provided by the manufacturer. and standard alarm length Rated operating temperature value This refers to the nominal temperature at which the temperature-sensing cable should, according to its design, issue a fire alarm signal, while the standard alarm length... This refers to the minimum length of heat-sensitive cable required to reliably trigger the alarm when it reaches the rated operating temperature. Obtaining these parameters is fundamental for subsequent testing, ensuring the relevance and accuracy of the tests. Based on this, two lengths are selected and marked at any location on the heat-sensitive cable, designated as the first test segment. Second test segment Both of these segments are equal in length to the standard alarm length. This marking can be achieved through physical labels or non-destructive marking pens, with the aim of providing standardized test samples for subsequent repeatable tests to verify the consistency of the temperature-sensing cable's performance.

[0040] In step S22, the marked first test segment The cable is placed in the heating chamber of the portable heat-sensing cable tester. This heating chamber is specifically designed to provide a controlled heating environment, and its core function is to uniformly heat the heat-sensing cable at a preset heating rate. The portable heat-sensing cable tester is then activated, heating the heating chamber at a strictly controlled rate of 1°C / min. This specific heating rate is designed to simulate the typical rate of temperature rise in a real fire scenario, ensuring that the test conditions are relevant to the actual application environment. Heating continues until the first test section is reached. When the internal temperature sensing element reaches its activation threshold, it sends a fire alarm signal to the connected signal processing unit. Once the fire alarm signal is triggered, the temperature value displayed by the portable temperature sensing cable tester at that moment is immediately recorded and denoted as [missing value]. First measured operating temperature This is the first test segment. The actual operating temperature at a specific heating rate.

[0041] Next, in step S23, the marked second test segment Place it in the heating chamber of the portable temperature-sensing cable tester and repeat the test procedure described in step S22. This means the second test segment... It will also be heated at a rate of 1℃ / min until it issues a fire alarm signal, and the temperature value displayed by the portable temperature sensing cable tester at this time will be recorded as follows. Through the second test segment By repeating the test, the second measured operating temperature of the temperature sensing cable can be obtained. This repeatability test is crucial for verifying the performance consistency of the temperature-sensing cable across different sections, helping to identify potential manufacturing defects or performance differences, thereby improving the reliability of the test results.

[0042] Finally, in step S24, the rated operating temperature value obtained in steps S21 to S23 is determined. First measured operating temperature and the second measured action temperature The action temperature test score is calculated using a preset scoring formula. Action temperature test score It is a quantitative indicator used to objectively evaluate whether the performance of temperature-sensing cables in terms of operating temperature meets the requirements. This score can transform complex test results into a simple and easy-to-understand numerical value, providing a direct basis for subsequent acceptance conclusions.

[0043] Through the above technical solution, this application provides a standardized and operable motion temperature testing procedure, effectively solving the problems of inaccurate motion temperature measurement, inconsistent test results, and missing data caused by the lack of a specific testing procedure in the prior art. Specifically, by clearly obtaining the rated motion temperature value... and standard alarm length Furthermore, two test sections of equal length were marked on the temperature-sensing cable to establish a unified benchmark for the test, avoiding arbitrariness and ensuring the test's relevance. Secondly, the first test section... Second test section Place the cable into the heating chamber of a portable temperature-sensing cable tester and heat it at a strictly controlled rate of 1℃ / min until the temperature-sensing cable emits a fire alarm signal and the first measured operating temperature is recorded. Second measured action temperature This simulates the temperature change process in a real fire environment, and the controlled heating rate ensures the stability and comparability of the test conditions. Repeat the first test segment. Second test segment The temperature of the first measured action was recorded respectively. Second measured operating temperature This enhances the repeatability and consistency of the data, effectively reduces errors that may be introduced by a single test, and ensures the reliability of the test results. Ultimately, based on the rated operating temperature value... First measured operating temperature Second measured operating temperature Calculate the action temperature test score The operating temperature performance of the heat-sensing cable was quantitatively evaluated, providing an objective and scientific basis for its commissioning and acceptance. This process, combined with the overall commissioning and acceptance method for heat-sensing cables in substations, makes the assessment of operating temperature more accurate and reliable, thereby improving the overall reliability of fire monitoring using heat-sensing cables and avoiding the risk of false alarms or missed alarms due to inaccurate operating temperature readings.

[0044] In the above-described embodiments of this application, response time and consistency tests are proposed to evaluate the response performance of heat-sensing cables. However, in the implementation process, the lack of standardized testing environment and methods may lead to inconsistent test results, affecting acceptance quality and thus failing to ensure the reliability and timeliness of heat-sensing cables in fire monitoring.

[0045] In response, this application further proposes a response time and consistency testing process, which specifically includes the following steps: Step S31: Calculate the test environment temperature for the response time test based on the rated operating temperature value, wherein... , Indicates the ambient temperature of the test environment. Represents a constant greater than 1. Indicates the rated operating temperature value; Step S32: Place the first test segment in a heating device that maintains a constant temperature in the test environment, and start timing simultaneously until the temperature sensing cable emits a fire alarm signal. Record the first measured response time at this time. Step S33: Place the second test segment in a heating device that maintains a constant temperature in the test environment, and start timing simultaneously until the temperature sensing cable emits a fire alarm signal. Record the second measured response time at this time. Step S34: Compare the first measured response time and the second measured response time with the rated response time value, respectively, and calculate the difference between the first measured response time and the second measured response time. Calculate the response time and the consistency test score based on the comparison result and the difference.

[0046] Specifically, in step S31, the test environment temperature for the response time test is calculated using a formula. This step aims to determine the standardized ambient temperature required to perform the response time test of the temperature-sensing cable. This is achieved by determining the required ambient temperature for the test. With rated operating temperature value This ensures that the test conditions match the inherent characteristics of the temperature-sensing cable, making the test results more representative and comparable. This is based on the rated operating temperature value. This calculation method avoids the arbitrariness of test temperature settings, providing a unified and reasonable temperature benchmark for subsequent response time tests. For example, the rated operating temperature value can be input through pre-programmed test software or a calculator. The test environment temperature is then automatically calculated. This information is then displayed to the operator for setting up the test equipment; alternatively, it can be accessed by consulting a pre-set lookup table, which is configured according to different rated operating temperature values. List the corresponding test environment temperatures Operators can directly find the test environment temperature based on the rated operating temperature value of the temperature sensing cable.

[0047] Secondly, in step S32, the heating bath of the portable temperature-sensing cable tester is heated to... And keep it constant, the first test segment Place the cable into the heating chamber of the portable temperature-sensing cable tester and synchronize the timing with a stopwatch. When the temperature-sensing cable emits a fire alarm signal, record the stopwatch time at this moment, which is the first measured response time. This step is the core of the actual response time test for temperature-sensing cables, aiming to simulate the response behavior of the temperature-sensing cable under specific high-temperature environments. This is achieved by precisely controlling the heating bath of the portable temperature-sensing cable tester at... The constant temperature ensured the stability and consistency of the testing environment. The first test section... By placing the cable in the heating bath of a portable heat-sensing cable tester and synchronizing the time with a stopwatch, the time required for the heat-sensing cable to generate a fire alarm signal after contact with high temperature can be accurately captured. This is crucial for evaluating the timeliness of the alarm in the event of a real fire. For example, the heating bath of the portable heat-sensing cable tester can use a PID (proportional-integral-derivative) controller for precise temperature control, ensuring that the temperature remains within a certain range. The temperature fluctuates within a certain range and remains constant. For timing, the built-in electronic timer of the tester or an external high-precision stopwatch can be used for synchronous timing. For example, the heating tank of a portable temperature-sensing cable tester can use a circulating heating medium (such as heat transfer oil or air), and the temperature sensor monitors and feeds back to the heating control unit in real time to maintain a constant temperature. Timing can be achieved by the tester manually operating the stopwatch, or by triggering an automatic timer through the fire alarm signal of the temperature-sensing cable.

[0048] Next, in step S33, the second test segment... Place the cable into the heating bath of the portable temperature sensing cable tester and repeat step S32 to obtain the second measured response time. This step aims to verify the consistency of response time between different sections of the temperature-sensing cable. This is achieved by testing the second test section. Repeat the same test procedure and record the response time to compare it with the first measured response time. Second measured response time The differences are noticeable. This repeated testing helps identify potential inconsistencies in the local performance of the heat-sensing cable during manufacturing or installation, ensuring reliable fire monitoring capabilities along its entire length. For example, after completing the first test section... After the test, the first test segment will be... Remove and cool the portable temperature-sensing cable tester from its heating chamber, then proceed with the second test section. Place the cable into the heating chamber of the same portable temperature-sensing cable tester and perform the test according to the same procedure in step S32; alternatively, a portable temperature-sensing cable tester with two or more independent heating chambers can be used to test the first test segment simultaneously or sequentially. Second test segment Conduct tests to improve testing efficiency and ensure consistency of test conditions.

[0049] Finally, in step S34, the first measured response time and the second measured response time are compared with the rated response time value, respectively, and the difference between the first measured response time and the second measured response time is calculated. Based on the comparison result and the difference, the response time and the consistency test score are calculated. The response time and the consistency test score are denoted as... This step aims to quantify the response time and consistency test results of the temperature-sensing cable into a comprehensive score. This is achieved by quantifying the complex test data (first measured response time). Second measured response time and rated response time value This is converted into a single numerical value: response time and consistency test score. This allows for a direct reflection of the temperature-sensing cable's performance in this test, facilitating the aggregation and comparison with other test scores to ultimately form a comprehensive acceptance conclusion. This quantitative scoring mechanism makes the acceptance process more objective and standardized. For example, the first measured response time can be determined based on preset scoring standards and formulas. Second measured response time Compared with the rated response time value Deviation, first measured response time Compared with the second measured response time Factors such as differences should be taken into account in the calculation. For example, the smaller the deviation and the better the consistency, the higher the score; alternatively, segmented scoring or weighted averaging can be used. For example, if the first measured response time... Second measured response time All within the rated response time value If the result falls within a certain percentage range, full marks are awarded; if it exceeds the range, points are deducted according to the degree of deviation. Additionally, the first measured response time... Second measured response time Differences between them can also be used as deductions.

[0050] In this step, the rated operating temperature value is used. Query the rated response time value of the temperature sensing cable. The rated response time value The first measured response time is used to evaluate the actual test results. Second measured response time The benchmark. Rated response time value. This is the standard response performance indicator specified in the design and manufacturing of temperature-sensing cables. By consulting this value, one can objectively determine whether the actual test response time meets the product standard or design requirements. For example, this can be done by referring to the product manual, technical specifications, or performance parameter table provided by the manufacturer, based on the rated operating temperature value. Find the corresponding rated response time value Alternatively, if the temperature sensing cable information has been entered into the database, the rated operating temperature value can be entered. Alternatively, you can search the database for the model number of the temperature sensing cable to automatically obtain its rated response time value. .

[0051] Through the above technical solution, this application addresses the lack of standardized environment and methods for testing the response time and consistency of temperature-sensing cables, providing a clear and operable testing procedure. Firstly, through the formula... Calculate the ambient temperature of the test environment ,constant The value is 1.4, which makes the test environment temperature... The rated operating temperature of the temperature sensing cable Direct correlation ensures the scientific nature and standardization of test conditions, avoids arbitrary test environment settings, and thus improves the accuracy and comparability of test results. Secondly, the first test segment... Second test segment The cables were placed into the heating chamber of a portable temperature-sensing cable tester with precise temperature control, and their response times were recorded simultaneously, which is the first measured response time. Second measured response time This repeated testing not only accurately assesses the response speed of the heat-sensing cable under simulated fire conditions, but also effectively verifies the performance consistency of the cable across different sections, avoiding the limitations of localized testing and ensuring the overall reliability of the heat-sensing cable. Simultaneously, by querying the rated response time value... As a benchmark, the actual test result is the first measured response time. Second measured response time The assessment is based on evidence. Ultimately, the test results are quantified into response time and consistency test scores. This provides objective and quantitative data support for subsequent comprehensive acceptance, making the response performance evaluation of the temperature sensing cable more comprehensive and accurate, thereby significantly improving the reliability and timeliness of the temperature sensing cable in fire monitoring and effectively ensuring the safe and stable operation of the substation.

[0052] In the above-described embodiments of this application, a signal upload integrity test is proposed to ensure that the alarm information of the temperature sensing cable can be uploaded correctly. However, in its implementation, there is a lack of step-by-step testing of each link in the signal upload process, which may cause the central control station to be unable to obtain the fire alarm information in a timely manner, posing a safety hazard.

[0053] In response, this application further proposes a method for the commissioning and acceptance of temperature-sensing cables in substations, wherein the signal transmission integrity test procedure is as follows: Step S41: Simulate a fault in the temperature sensing cable and sequentially check the fault indication status of the signal processing unit and the fire alarm unit; the fault component address code displayed by the fire alarm unit; the reception status of the central control station for the fault alarm information; and obtain the fault signal upload integrity test score based on the inspection results of the fault indication status, fault component address code, and reception status. Step S42: Simulate a fire in a heat-sensing cable and sequentially check the fire alarm indication status of the signal processing unit and the fire alarm unit; the fire alarm component address code displayed by the fire alarm unit; and the reception status of the central control station for the fire alarm information. Based on the inspection results of the fire alarm indication status, fire alarm component address code, and reception status, obtain the fire signal upload integrity test score. Step S43: Add the fault signal upload integrity test score to the fire signal upload integrity test score to obtain the signal upload integrity test score.

[0054] Specifically, before step S41, the field number of the temperature sensing cable is obtained, and the signal upload integrity test score is recorded as follows. The score for the fault signal upload integrity test is recorded as follows: The score for the fire signal upload integrity test is recorded as follows: Obtaining the field number of the temperature-sensing cable aims to provide a unique identifier for subsequent testing, ensuring that test results accurately correspond to the specific temperature-sensing cable. The field number can be a pre-set physical label on the temperature-sensing cable, a QR code, or a unique internal system identifier, which maintenance personnel can obtain by scanning or manually entering. Simultaneously, the signal upload integrity test score is also included. Fault signal upload integrity test score Fire signal upload integrity test score These scoring variables, used to quantify the integrity of signal uploads, can be initialized and recorded in test log sheets, spreadsheets, or specialized test software, laying the foundation for systematically tracking and evaluating the integrity of signal uploads.

[0055] In step S41, the connection between the temperature sensing cable and the signal processing unit terminal is disconnected, and a fault signal transmission integrity test is performed; the fault indication status of the signal processing unit is recorded as follows. The fault indicator light of the signal processing unit illuminates, and a value of 0.5 is assigned; the fault status of the fire alarm unit is recorded as follows. The fault indicator light of the fire alarm unit illuminates, and a value of 0.5 is assigned; the consistency status between the fault component address code displayed by the fire alarm unit and the field number of the temperature sensing cable is recorded as follows. The fault component address code displayed by the fire alarm unit matches the field number of the heat-sensing cable, and is assigned a value of 1 point; the reception status of the fault alarm information by the central control station is recorded as follows. The central control station received a fault alarm message and assigned it a score of 3. (Fault signal upload integrity test score) This can be expressed as a formula: .

[0056] Disconnecting the temperature sensing cable from the signal processing unit's terminals simulates a fault in the cable, verifying the cascading fault signal transmission function. This can be achieved by physically unplugging the terminals. Subsequently, the transmission and identification of the fault signal at the local device level are verified by observing whether the fault indicator lights on the signal processing unit and the fire alarm unit are illuminated, and by verifying that the fault component address code displayed on the fire alarm unit's screen matches the field number of the temperature sensing cable. Furthermore, it's necessary to confirm whether the central control station has received the corresponding fault alarm information, which can be confirmed by logging into the central control station's monitoring system interface and checking the alarm information records. By assigning values ​​to these components, the cascading fault signal transmission path from local to remote is fully verified, effectively avoiding the risk of signal interruption or false alarms.

[0057] In step S42, the first test segment The cable is placed in the heating bath of a portable heat-sensing cable tester and heated at a rate of 1°C / min until it emits a fire alarm signal, thus performing a fire signal transmission integrity test; the fire alarm indication status of the signal processing unit is recorded as follows. The fire alarm indicator light in the signal processing unit illuminates, and a value of 0.5 is assigned; the fire alarm indication status of the fire alarm unit is recorded as follows. The fire alarm indicator light of the fire alarm unit illuminates, and a value of 0.5 is assigned; the consistency status between the fire alarm component address code displayed by the fire alarm unit and the field number of the heat sensing cable is recorded as follows. The fire alarm unit's displayed fire alarm component address code matches the field number of the heat-sensing cable, and is assigned a value of 1 point; the central control station's reception status of the fire alarm information is recorded as follows. The central control station received a fire alarm message and assigned it a score of 3. (Fire signal upload integrity test score) This can be expressed as a formula: .

[0058] The first test segment The cable is placed in the heating bath of a portable heat-sensing cable tester and heated at a rate of 1°C / min until it emits a fire alarm signal. This simulates the alarm state of the heat-sensing cable in a real fire scenario to verify the hierarchical transmission function of the fire alarm signal. This heating process can be achieved by placing the test section of the heat-sensing cable in a heating device with precise temperature control, such as a constant-temperature water bath or electric furnace, and using a temperature sensor to monitor the heating rate in real time to ensure the accuracy of the simulated environment. After the heat-sensing cable emits a fire alarm signal, it is necessary to observe whether the fire alarm indicator light on the signal processing unit and the fire alarm unit is lit, and to verify whether the fire alarm component address code displayed on the fire alarm unit screen matches the field number of the heat-sensing cable, to verify the transmission and identification of the fire alarm signal at the local device layer. Simultaneously, it is also necessary to confirm whether the central control station has received the corresponding fire alarm information, which can be confirmed by logging into the central control station's monitoring system interface and checking the alarm information records. By assigning values ​​to these aspects, it is ensured that the fire signal can be transmitted completely and promptly in a real scenario, preventing delays or loss.

[0059] In step S43, the fault signal upload integrity test score is added to the fire signal upload integrity test score to obtain the signal upload integrity test score. Expressed as a formula, .

[0060] Calculate the signal upload integrity test score Its function is to comprehensively quantify the transmission performance of fault signals and fire signals, providing an objective basis for acceptance testing. This calculation can be performed manually using a calculator or spreadsheet software, based on the score of the fault signal transmission integrity test. The score for the fire signal upload integrity test is recorded as follows: The scores are weighted and summed, or the calculation is automatically completed and a report is generated by specialized acceptance testing software.

[0061] Through the aforementioned technical solution, this application addresses the lack of step-by-step verification in the signal transmission process by defining a detailed signal transmission integrity testing procedure. This solution not only comprehensively tests the entire signal transmission link of the heat-sensing cable from the local signal processing unit to the fire alarm unit and then to the central control station through simulating two typical scenarios: faults and fires, but also ensures that fault and fire alarm information is transmitted to the central control station completely, accurately, and promptly by quantitatively scoring the indicator light status, address code consistency, and reception status of each key link. This step-by-step verification and quantitative evaluation method effectively eliminates blind spots and hidden dangers in the signal transmission process, significantly improving the reliability and safety of the heat-sensing cable fire monitoring system, providing a solid foundation for the subsequent operation and maintenance of the substation, and thus avoiding safety hazards caused by inadequate acceptance testing.

[0062] The above-mentioned solution in this application proposes a standardized installation test to evaluate the installation quality of the heat-sensing cable. However, in its implementation, the lack of specific testing procedures and quantitative standards can lead to incomplete acceptance, failure to accurately identify installation defects, thereby increasing the risk of false alarms and delayed alarms, and affecting the fire monitoring reliability of the heat-sensing cable.

[0063] In response, this application further proposes a standardized installation testing procedure, which specifically includes: Step S51: Check the laying path of the temperature sensing cable body, measure and record the suspended length, the length squeezed by the object, and the length covered by the covering. Step S52: Calculate the standardization score of the laying of the temperature sensing cable body based on the ratios of the suspended length, the length squeezed by the object, and the length covered by the covering to the total installation length of the temperature sensing cable. Step S53: Check the installation location and installation method of the temperature sensing cable accessories. The temperature sensing cable accessories include a terminal box, a signal processing unit, and an input module. Step S54: Based on the inspection results of the installation position and installation method of the temperature sensing cable accessories, calculate the installation standardization score of the temperature sensing cable accessories. Step S55: Add the score for the standardization of the laying of the temperature sensing cable body to the score for the standardization of the installation of the temperature sensing cable supporting components to obtain the installation standardization test score.

[0064] Specifically, before step S51, the total installation length of the temperature sensing cable is obtained. The installation compliance test score will be recorded as follows: The score for the standardization of the laying of the temperature sensing cable body is recorded as follows: The score for the standardized installation of temperature sensing cable components will be recorded as follows: This step aims to lay the foundation for subsequent quantitative assessment. This includes the total installation length of the temperature-sensing cable. This is a prerequisite for conducting a compliance assessment of the installation, which can be achieved through on-site measurement with a measuring tape, laser rangefinder-assisted measurement, or verification in conjunction with engineering design drawings. Simultaneously, a score for the installation compliance test is defined. Score for compliance with the installation standards of the temperature sensing cable Score for the standardization of installation of temperature sensing cable and related components These variables provide a unified scoring framework for quantifying and summarizing the results of various tests.

[0065] First, in step S51, the laying path of the temperature sensing cable is checked, and the suspended length is recorded as... The length of the compressed object will be recorded as The length covered by the covering is denoted as This step involves on-site inspection of the temperature-sensing cable's installation path to identify and quantify installation defects that may affect its performance. Suspended cables may prevent effective temperature sensing; the length of the suspended cable is crucial. This can be obtained through visual inspection combined with measuring tools; the internal structure of the temperature-sensing cable may be damaged if it is compressed by an object, and the length of the compression is [not specified]. This can be detected and measured visually; the presence of fire-retardant coating on the temperature-sensing cable may hinder heat transfer, affecting the response speed, and the length of the coating may also be affected. This can be confirmed and measured through visual inspection. These inspections can be carried out by substation maintenance personnel during on-site visits.

[0066] Next, in step S52, the standardization score for the laying of the temperature-sensing cable is calculated using a formula and recorded as follows: This step aims to quantify and evaluate the laying defects of the temperature-sensing cable body identified in step S51. The suspended length is calculated using a preset formula. Length compressed by physical objects and the length covered by the covering These defect parameters are converted into a comprehensive score, namely, the standardization score for the laying of the temperature sensing cable. This score objectively reflects the quality of the installation of the temperature-sensing cable, providing data support for subsequent overall evaluation. The formula is: .

[0067] Subsequently, in step S53, it is clarified that the temperature sensing cable accessories include a terminal box, a signal processing unit, an input module, etc., and the installation status of the temperature sensing cable accessories is checked. The standard installation of the terminal box is recorded as follows: When the terminal box is installed inside a metal module box, it is worth 2 points; when it is installed inside a cable trench, it is worth 0 points; otherwise, it is worth 1 point. The standardization of the signal processing unit installation is recorded as follows: When the signal processing unit is installed inside a metal module box, it is worth 2 points; when it is installed inside a cable trench, it is worth 0 points; otherwise, it is worth 1 point. The compliance of the input module installation is recorded as follows: When the input module is installed inside a metal module box, it receives 1 point; when it is installed in a cable trench, it receives 0 points; otherwise, it receives 0.5 points. This step focuses on evaluating the installation quality of key components of the temperature-sensing cable system. The installation location and method of components such as terminal boxes, signal processing units, and input modules directly affect the system's reliability and ease of maintenance. For example, installing the terminal box or signal processing unit inside a metal module box provides better physical protection and electromagnetic shielding, thus receiving a higher score; while installing it in a damp, corrosive cable trench results in a lower score. This inspection can be conducted through on-site visual inspection, photographic documentation, or review of installation records, and the installation compliance of each component is quantified and assigned a value according to a preset scoring standard, such as the installation compliance of the terminal box. Signal processing unit installation specifications Input module installation specifications .

[0068] In step S54, the installation compliance score of the temperature sensing cable and its supporting components is calculated using a formula. The formula is: This step aims to integrate the installation compliance evaluation results of each supporting component from step S53. Using a preset calculation formula, the terminal box installation compliance... Signal processing unit installation specifications Input module installation specifications The scores for each item are combined into a comprehensive score for the installation standardization of temperature sensing cable assemblies. This score comprehensively reflects the installation quality of the temperature sensing cable and its supporting components.

[0069] Finally, in step S55, the installation compliance test score is calculated using a formula. This step aims to conduct a final comprehensive evaluation of the overall installation quality of the temperature-sensing cable. A pre-defined calculation formula is used to assign a score to the cable's installation compliance. Score for the standardization of installation of temperature sensing cable and related components The scores are added together to obtain the installation compliance test score. This score is a key indicator for measuring the installation quality of the temperature-sensing cable and its supporting components, providing an important quantitative basis for the final commissioning and acceptance conclusion.

[0070] Through the above technical solution, this application provides a systematic and quantitative testing method for the standardized installation of temperature-sensing cables. This method involves meticulously inspecting the laying condition of the temperature-sensing cable, such as the length of suspension. Length compressed by physical objects and the length covered by the covering The process involved quantitative scoring to effectively identify physical defects that could lead to inaccurate temperature sensing or response delays. Simultaneously, the installation locations and methods of key supporting components such as terminal boxes, signal processing units, and input modules were standardized and assigned values, ensuring the reliable operation of these components. This combination of itemized inspection and quantitative scoring allows for the accurate identification and objective assessment of installation defects, avoiding the incomplete acceptance issues caused by the lack of specific standards in traditional acceptance methods. Finally, the standardized score of the temperature-sensing cable's installation was calculated comprehensively. Score for the standardization of installation of temperature sensing cable and related components The installation compliance test score was obtained. This provides comprehensive and accurate quantitative data for the commissioning and acceptance of temperature-sensing cables. This significantly reduces the risk of false alarms and delayed alarms caused by improper installation, thereby improving the reliability and accuracy of fire monitoring using temperature-sensing cables.

[0071] In the above-described embodiments of this application, step S6 is proposed to calculate the test score and give an acceptance conclusion. However, the lack of specific calculation methods and unified standards in this process leads to subjective inconsistencies in the acceptance results, which affects the operational reliability of the temperature sensing cable.

[0072] In this regard, this application further proposes that step S6 includes the following sub-steps: Step S61: Summarize the scores for the action temperature test, response time and consistency test, signal transmission integrity test, and installation compliance test. Step S62: Calculate the commissioning acceptance test score of the temperature sensing cable using the following formula: ; in, This indicates the score of the commissioning and acceptance test for the temperature-sensing cable. The weighting coefficients representing the motion temperature test scores. This indicates the score of the action temperature test. The weighting coefficients represent the response time and consistency test score. This indicates the response time and consistency test score. The weighting coefficients represent the score of the signal transmission integrity test. This indicates the score for the signal transmission integrity test. The weighting coefficients representing the installation compliance test scores. This indicates the score for the installation compliance test; , , , ,and ; Step S63: If the temperature sensing cable's commissioning acceptance test score is greater than the pass threshold, the acceptance is qualified; otherwise, the acceptance is unqualified.

[0073] Step S61 aims to comprehensively collect evaluation results of the temperature-sensing cable across different performance dimensions, ensuring that all key indicators are included in the final acceptance scope. Specifically, the aggregation process can be implemented in various ways. For example, test scores for each testing stage can be manually recorded and entered into a pre-set spreadsheet or database for centralized management. Alternatively, an automated testing system can automatically transmit the corresponding score data to a central processing unit for unified aggregation after completing the operating temperature test, response time and consistency test, signal transmission integrity test, and installation compliance test. This aggregation mechanism ensures the integrity and traceability of the acceptance data.

[0074] Regarding step S62, this step introduces a weighted summation calculation method to comprehensively evaluate the scores of each test item, thereby quantifying the overall performance of the temperature-sensing cable. The setting of weighting coefficients is crucial, as they reflect the relative importance of different test items in the commissioning and acceptance of the temperature-sensing cable. These weighting coefficients can be selected within a preset range; for example, specific values ​​can be determined based on industry standards, expert experience, or historical operating data analysis, and then embedded in the acceptance management software. Another approach is to determine the weighting coefficients based on the actual operating environment, risk level, or emphasis on different performance indicators of a specific substation, while meeting a preset range (such as...). Between 0.5 and 0.6, Between 0.1 and 0.2, Between 0.2 and 0.3, Under the premise of a weighting between 0.1 and 0.2, and a total weight of 1, the weighting coefficients are dynamically adjusted to adapt to different acceptance requirements. This weighted calculation method ensures the objectivity and scientific nature of the evaluation results.

[0075] Regarding step S63, this step provides clear acceptance criteria for the commissioning of the temperature-sensing cable, transforming the quantified comprehensive score into a clear acceptance conclusion. Specifically, the acceptance threshold of "9 points" can serve as a unified judgment benchmark, and the commissioning acceptance test score for the temperature-sensing cable... It needs to be compared with this threshold. The commissioning acceptance test score of the temperature-sensing cable... If the threshold is exceeded, the cable is deemed to have passed acceptance; otherwise, it is deemed to have failed acceptance. This judgment mechanism can be implemented manually or through an automated system, where the system calculates the commissioning acceptance test score for the temperature-sensing cable. Then, it automatically compares with the qualified threshold and generates the corresponding acceptance conclusion, thereby avoiding the uncertainty caused by subjective judgment and ensuring the consistency and operability of the acceptance results.

[0076] Through the above technical solution, this application introduces a systematic scoring summary, weighted calculation, and clear qualification criteria into the commissioning and acceptance method for temperature-sensing cables. This is achieved through the scoring of the operating temperature test. Response time and consistency test scores Signal upload integrity test score Installation compliance test score A comprehensive summary was conducted to ensure that all key performance indicators of the temperature-sensing cable were considered, avoiding the omission of any factors that might affect its operational reliability, thus providing a complete data foundation for subsequent comprehensive evaluation. Step S62 introduces a weighted calculation formula. The weighting mechanism sets clear value ranges for the weighting coefficients, ensuring that the importance of different test items in the final acceptance results is scientifically and reasonably reflected. This weighting mechanism effectively avoids bias caused by subjective judgment, ensuring the objectivity and fairness of the acceptance results, especially highlighting the importance of the core performance indicator of operating temperature. Step S63 sets clear qualification thresholds, directly converting the quantified comprehensive score into a clear conclusion of "acceptance qualified" or "acceptance unqualified," greatly improving the operability and consistency of the acceptance process. Overall, this solution solves the problem of the lack of specific calculation standards and unified judgment criteria in existing acceptance methods, making the commissioning and acceptance process of temperature-sensing cables more standardized, normalized, and intelligent, thereby significantly improving the commissioning quality and operational reliability of temperature-sensing cables.

[0077] The following example will provide a more detailed explanation of the above technical solution: A substation recently installed a batch of resettable constant-temperature sensing cables for fire monitoring in cable ducts. To ensure these cables can reliably monitor fires after being put into operation and to avoid safety hazards caused by improper acceptance procedures, the maintenance personnel decided to adopt a systematic commissioning and acceptance method.

[0078] First, before acceptance testing begins, maintenance personnel perform step S1 to collect key parameters of the temperature-sensing cable. For example, for a temperature-sensing cable with a rated operating temperature of 85°C, its standard alarm length is 1 meter and its rated response time is 30 seconds. These data will serve as the benchmark for subsequent testing.

[0079] Next, the maintenance personnel will perform step S2 to test the operating temperature of the temperature-sensing cable. This test aims to obtain the actual operating temperature data of the temperature-sensing cable, thus addressing the potential lack of actual operating temperature data in existing acceptance methods. The specific operation will be carried out according to the following procedure: Step S21: Identify the temperature sensing cable and obtain its rated operating temperature value. (e.g., 85℃) and standard alarm length (For example, 1 meter). Mark two arbitrary lengths on the temperature sensing cable, and denote them as the first test segment. Second test segment And the first test segment Second test segment The length of each is 1 meter.

[0080] Step S22, the first test segment The cable is placed in the heating chamber of a portable temperature-sensing cable tester and heated at a rate of 1°C / min. When the temperature-sensing cable emits a fire alarm signal, the first measured operating temperature displayed by the portable temperature-sensing cable tester is recorded. (e.g., 90℃).

[0081] Step S23, the second test segment Place it in the heating tank of the portable temperature sensing cable tester, repeat step S22, and obtain the second measured operating temperature. (e.g., 83℃).

[0082] Step S24, based on the rated operating temperature value First measured operating temperature Second measured operating temperature Calculate the action temperature test score .

[0083] The calculated score for the action temperature test was... It is recorded as 10 points.

[0084] This test allows us to obtain the actual operating temperature data of the temperature-sensing cable, ensuring that it meets design requirements and avoiding the shortcomings of only conducting simulated fire function tests while ignoring the actual operating temperature.

[0085] Subsequently, maintenance personnel performed step S3, conducting a response time and consistency test on the temperature-sensing cable. This test is used to evaluate the response speed of the temperature-sensing cable at a specific temperature and the consistency of its response time across different sections, to ensure timely alarm activation in the event of a fire. The specific operation is carried out according to the following procedure: Step S31: Calculate the test environment temperature for the response time test using the formula. .For example, .

[0086] Step S32, heat the portable temperature sensing cable tester to... (For example, 120℃) and kept constant. The first test section... Place the cable in the heating chamber of the portable temperature-sensing cable tester and synchronize the timing with a stopwatch. When the temperature-sensing cable emits a fire alarm signal, record the stopwatch time at that moment, which is the first measured response time. (For example, 23 seconds).

[0087] Step S33, the second test segment Place the cable into the heating chamber of the portable temperature sensing cable tester and repeat step S32 to obtain the second measured response time. (e.g., 25 seconds).

[0088] Step S34, based on the rated response time value First measured response time Second measured response time Calculate the response time and consistency test score of the temperature sensing cable. .

[0089] The response time and consistency test scores were calculated. It is recorded as 10 points.

[0090] This test ensures the response speed and consistency of the temperature sensing cable, which is crucial for the timely detection of potential fire hazards.

[0091] Next, the maintenance personnel performed step S4, conducting a signal transmission integrity test on the temperature sensing cable. This test aims to verify whether the entire alarm signal link from the temperature sensing cable to the central control station is unobstructed, ensuring the central control station receives fire alarm information in a timely manner. The specific operation is carried out according to the following procedure: Before step S41, obtain the field number of the temperature sensing cable (e.g., "CT-001"). Record the signal upload integrity test score as... The score for the fault signal upload integrity test is recorded as follows: The score for the fire signal upload integrity test is recorded as follows: .

[0092] Step S41: Disconnect the temperature sensing cable from the signal processing unit's wiring terminals to simulate a fault. Upon inspection, the fault indicator light on the signal processing unit illuminates (indicating a fault indicative status of the signal processing unit). (Assign a score of 0.5); The fault indicator light of the fire alarm unit is not lit (fault status of the fire alarm unit). (Assign a score of 0); The fault component address code displayed by the fire alarm unit is consistent with the field number of the heat sensing cable (consistency status of the fault component address code displayed by the fire alarm unit and the field number of the heat sensing cable). (Assign 1 point); The central control station receives fault alarm information (the central control station's status in receiving fault alarm information). (Assign a value of 3 points).

[0093] Step S42, the first test segment The cable was placed in the heating chamber of a portable temperature-sensing cable tester and heated at a rate of 1°C / min until the cable emitted a fire alarm signal, simulating a fire. Upon inspection, the fire alarm indicator light on the signal processing unit was not illuminated (the fire alarm indication status of the signal processing unit was not displayed). (Assign a score of 0); The fire alarm indicator light of the fire alarm unit is on (fire alarm indication status of the fire alarm unit). (Assign a score of 0.5); The fire alarm component address code displayed by the fire alarm unit is inconsistent with the on-site number of the heat sensing cable (consistency status of the fire alarm component address code displayed by the fire alarm unit and the on-site number of the heat sensing cable). (Assign a score of 0); The central control station receives fire alarm information (the central control station's status in receiving fire alarm information). (Assign a value of 3 points).

[0094] Step S43: Upload the fault signal with the integrity test score. Fire signal upload integrity test score The scores are added together to obtain the signal upload integrity test score.

[0095] Calculated: ; ; ; By testing the signal upload step by step, the integrity and effectiveness of the alarm information transmission chain from the field to the central control station are ensured, thus resolving the potential risks of not testing the uploaded signals step by step in the existing acceptance process.

[0096] Next, maintenance personnel perform step S5, conducting an installation compliance test on the temperature sensing cable. This test aims to check the installation quality of the temperature sensing cable itself and its components, avoiding false alarms, delayed alarms, and other problems caused by improper installation. The specific operation is carried out according to the following procedure: Before step S51, obtain the actual installation length of the temperature sensing cable, i.e., the total installation length of the temperature sensing cable. The length is 100 meters. The installation compliance test score will be recorded as follows: The score for the standardization of the laying of the temperature sensing cable body is recorded as follows: The score for the standardized installation of temperature sensing cable components will be recorded as follows: .

[0097] Step S51: Check the laying path of the temperature sensing cable and record the suspended length. The length is 10 meters, the length compressed by the actual object. The length is 7 meters, plus the length of the temperature-sensing cable covered by fire-retardant coating, i.e., the length covered by the covering material. It is 3 meters.

[0098] Step S52: Calculate the standardization score of the temperature sensing cable installation using the formula. .

[0099] Calculated: ; Score for Standardization of Temperature Sensing Cable Laying It is scored as 4 points.

[0100] This step ensures that the laying of the temperature sensing cable complies with specifications, reducing the risk of false alarms and delayed alarms.

[0101] Step S53: The temperature sensing cable assembly includes a terminal box, signal processing unit, input module, etc. The installation of the temperature sensing cable assembly is inspected. Upon inspection, the terminal box is installed inside a metal module box, and the installation is in accordance with specifications. 2 points; The signal processing unit is installed in the cable trench, and the installation of the signal processing unit is up to standard. A score of 0 was assigned; the input module is installed inside a metal module box, and the installation of the input module conforms to specifications. Assign 1 point.

[0102] Step S54: Calculate the installation compliance score of the temperature sensing cable and its supporting components using the formula. .

[0103] Calculated: ; Score for the standardization of installation of temperature sensing cable accessories It is worth 3 points.

[0104] Step S55: Calculate the installation compliance test score using the formula. .

[0105] Calculated: ; Installation compliance test score It is scored as 7 points.

[0106] This comprehensive installation inspection solves the problem of not checking the installation location and quality of the temperature sensing cable body and components in the existing acceptance process, effectively avoiding potential false alarms and delayed alarm risks.

[0107] Finally, the maintenance personnel execute step S6 to calculate all test scores for the temperature-sensing cable and provide a commissioning acceptance conclusion based on these scores. This step provides a quantitative and objective acceptance standard, resolving the issue of inconsistent acceptance quality in the past. The specific operation is carried out according to the following sub-steps:

[0108] Step S61: Summarize the action temperature test scores. Response time and consistency test scores Signal upload integrity test score Installation compliance test score .

[0109] Step S62: Calculate the commissioning acceptance test score of the temperature sensing cable using the formula. .

[0110] Calculated: Set weight coefficients =0.55, =0.10, =0.25, =0.10; .

[0111] Step S63: The commissioning acceptance test score of the temperature sensing cable can be calculated. The score was 9.2, which is greater than the passing threshold of 9, so the acceptance was deemed successful.

[0112] This comprehensive scoring mechanism takes into account multiple dimensions such as the performance, signal transmission, and installation quality of the temperature sensing cable, providing a comprehensive and objective acceptance standard. It significantly improves the commissioning and acceptance quality and operational reliability of temperature sensing cables, and avoids safety hazards caused by inadequate acceptance.

[0113] Using the above methods, the substation's operation and maintenance personnel can conduct a comprehensive, systematic, and quantitative acceptance test of the heat-sensing cables, ensuring their fire monitoring capabilities. Compared to existing acceptance methods that only test simulated fire functions or do not check installation quality, this method significantly improves the scientific rigor and reliability of the acceptance process by introducing action temperature testing, response time consistency testing, step-by-step signal transmission integrity testing, and installation standardization testing of the cable itself and its components. Combined with weighted calculations to provide a comprehensive acceptance score, this effectively solves the problem of inadequate acceptance testing of heat-sensing cables during commissioning.

[0114] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for commissioning and accepting temperature-sensing cables in substations, characterized in that, The methods include: Step S1: Collect the rated operating temperature value, standard alarm length, and rated response time value of the temperature sensing cable; Step S2: Based on the rated operating temperature value and standard alarm length, perform an operating temperature test on the temperature sensing cable to obtain an operating temperature test score. Step S3: Based on the rated operating temperature value and rated response time value, perform response time and consistency tests on the temperature sensing cable to obtain response time and consistency test scores. Step S4: Perform a signal transmission integrity test on the temperature sensing cable and obtain the signal transmission integrity test score; Step S5: Perform an installation compliance test on the temperature sensing cable and obtain the installation compliance test score; the specific steps are as follows: Step S51: Check the laying path of the temperature sensing cable body, measure and record the suspended length, the length squeezed by the object, and the length covered by the covering. Step S52: Calculate the standardization score of the laying of the temperature sensing cable body based on the ratios of the suspended length, the length squeezed by the object, and the length covered by the covering to the total installation length of the temperature sensing cable. Step S53: Check the installation location and installation method of the temperature sensing cable accessories. The temperature sensing cable accessories include a terminal box, a signal processing unit, and an input module. Step S54: Based on the inspection results of the installation position and installation method of the temperature sensing cable accessories, calculate the installation standardization score of the temperature sensing cable accessories. Step S55: Add the score for the standardization of laying the temperature sensing cable body to the score for the standardization of installation of the temperature sensing cable supporting components to obtain the installation standardization test score. Step S6: The scores for the action temperature test, response time and consistency test, signal transmission integrity test, and installation standardization test are weighted and summed to calculate the commissioning acceptance test score of the temperature sensing cable; and the commissioning acceptance conclusion of the temperature sensing cable is given based on the commissioning acceptance test score of the temperature sensing cable.

2. The method for commissioning and acceptance of a substation temperature-sensing cable according to claim 1, characterized in that, In step S2, the operating temperature of the temperature sensing cable is tested based on the rated operating temperature value and the standard alarm length to obtain the operating temperature test score. The specific steps are as follows: Step S21: Mark two test segments on the temperature sensing cable, both of which are the standard alarm length, and designate them as the first test segment and the second test segment, respectively. Step S22: Place the first test section in the heating device and heat it at the first heating rate until the temperature sensing cable emits a fire alarm signal, and record the first measured operating temperature at this time. Step S23: Place the second test section in the heating device and heat it at the first heating rate until the temperature sensing cable emits a fire alarm signal, and record the second measured operating temperature at this time. Step S24: Compare the first measured operating temperature and the second measured operating temperature with the rated operating temperature value, and calculate the operating temperature test score based on the comparison results.

3. The method for commissioning and acceptance of a substation temperature-sensing cable according to claim 2, characterized in that, In step S3, based on the rated operating temperature value and rated response time value, the temperature sensing cable is subjected to response time and consistency tests to obtain response time and consistency test scores; the specific steps are as follows: Step S31: Calculate the test environment temperature for the response time test based on the rated operating temperature value, wherein... , Indicates the ambient temperature of the test environment. Represents a constant greater than 1. Indicates the rated operating temperature value; Step S32: Place the first test segment in a heating device that maintains a constant temperature in the test environment, and start timing simultaneously until the temperature sensing cable emits a fire alarm signal. Record the first measured response time at this time. Step S33: Place the second test segment in a heating device that maintains a constant temperature in the test environment, and start timing simultaneously until the temperature sensing cable emits a fire alarm signal. Record the second measured response time at this time. Step S34: Compare the first measured response time and the second measured response time with the rated response time value, respectively, and calculate the difference between the first measured response time and the second measured response time. Calculate the response time and the consistency test score based on the comparison result and the difference.

4. The method for commissioning and acceptance of a substation temperature-sensing cable according to claim 3, characterized in that, In step S4, a signal transmission integrity test is performed on the temperature sensing cable to obtain a signal transmission integrity test score. The specific steps are as follows: Step S41: Simulate a fault in the temperature sensing cable and check the fault indication status of the signal processing unit and the fire alarm unit in sequence; the fault component address code displayed by the fire alarm unit; and the reception status of the central control station for the fault alarm information. Based on the inspection results of the fault indication status, fault component address encoding, and reception status, a fault signal upload integrity test score is obtained. Step S42: Simulate a fire in a heat-sensing cable and sequentially check the fire alarm indication status of the signal processing unit and the fire alarm unit; the fire alarm component address code displayed by the fire alarm unit; and the reception status of the central control station for the fire alarm information. Based on the inspection results of the fire alarm indication status, fire alarm component address code, and reception status, obtain the fire signal upload integrity test score. Step S43: Add the fault signal upload integrity test score to the fire signal upload integrity test score to obtain the signal upload integrity test score.

5. The method for commissioning and acceptance of a substation temperature-sensing cable according to claim 4, characterized in that, In step S6, the scores for the action temperature test, response time and consistency test, signal transmission integrity test, and installation compliance test are weighted and summed to calculate the commissioning acceptance test score of the temperature-sensing cable; and based on the commissioning acceptance test score, the commissioning acceptance conclusion of the temperature-sensing cable is given; the specific steps are as follows: Step S61: Summarize the scores for the action temperature test, response time and consistency test, signal transmission integrity test, and installation compliance test. Step S62: Calculate the commissioning acceptance test score of the temperature sensing cable using the following formula: ； in, This indicates the score of the commissioning acceptance test for the temperature-sensing cable. The weighting coefficients representing the motion temperature test scores. This indicates the score of the action temperature test. The weighting coefficients represent the response time and consistency test score. This indicates the response time and consistency test score. The weighting coefficients represent the score of the signal transmission integrity test. This indicates the score for the signal transmission integrity test. The weighting coefficients representing the installation compliance test scores. This indicates the score for the installation compliance test; , , , ,and ; Step S63: If the temperature sensing cable's commissioning acceptance test score is greater than the pass threshold, the acceptance is qualified; otherwise, the acceptance is unqualified.

6. The method for commissioning and acceptance of a substation temperature-sensing cable according to claim 2, characterized in that, In step S24, calculating the action temperature test score based on the comparison results includes: First measured operating temperature Satisfying the relation And the second measured operating temperature Satisfying the relation If the temperature test result is positive, the score is 10 points; otherwise, it is 0 points. This indicates the rated operating temperature value.

7. The method for commissioning and acceptance of a substation temperature-sensing cable according to claim 3, characterized in that, In step S31, the constant The value is 1.

4.

8. The method for commissioning and acceptance of a substation temperature-sensing cable according to claim 3, characterized in that, In step S34, calculating the response time and consistency test score based on the comparison results and the difference includes: First measured response time and the second measured response time All are not greater than the rated response time value. If the absolute value of the difference between the two is no greater than 5 seconds, then the response time and consistency test score is recorded as 10 points; the first measured response time and the second measured response time All are not greater than the rated response time value. If the response time and consistency test score is 7, then the response time and consistency test score is 0.

9. The method for commissioning and acceptance of a substation temperature-sensing cable according to claim 1, characterized in that, In step S52, the formula for calculating the standardization score of the temperature sensing cable installation is as follows: ； in, This indicates the score for the standardization of the installation of the temperature sensing cable. Indicates the length of suspension. Indicates the length compressed by the object. Indicates the length covered by the covering. This indicates the total installation length of the temperature sensing cable.

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