CN115524536A - Method, device and system for testing direct current resistance and evaluating state of dry-type reactor - Google Patents
Method, device and system for testing direct current resistance and evaluating state of dry-type reactor Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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Abstract
The application relates to a method, a device and a system for testing direct current resistance and evaluating state of a dry-type reactor. The method comprises the following steps: acquiring the ambient temperature of the dry type reactor; acquiring the acquired temperature of the dry-type reactor, and processing the temperature of the dry-type reactor to obtain the average temperature of the dry-type reactor; according to the ambient temperature and the average temperature of the dry-type reactor, the temperature of the dry-type reactor is adjusted so that the temperature of the dry-type reactor and the ambient temperature reach a heat exchange stable state; acquiring a direct current resistance value of the dry type reactor when the temperature of the dry type reactor and the ambient temperature reach a heat exchange stable state; and converting the direct current resistance value into an actual direct current resistance value of the dry-type reactor at the factory temperature, comparing the actual direct current resistance value with the factory direct current resistance value of the dry-type reactor, and evaluating the state of the dry-type reactor according to a comparison result. The method can solve the problem that the direct current resistance test of the dry-type reactor is limited by meteorological conditions.
Description
Technical Field
The application relates to the technical field of reactor testing, in particular to a method, a device and a system for testing direct current resistance and evaluating state of a dry reactor.
Background
With the continuous development of electric power systems in China, the alternating current/direct current dry-type reactor is widely applied to extra-high voltage and extra-high voltage electric power systems due to simple structure and low operation and maintenance cost. Because the dry reactor is in operation, the dry reactor is not only impacted by various system harmonic waves for a long time, but also the coil continuously accumulates the action of electric power, and the winding is broken, the turn-to-turn short circuit and the like are caused; the aging and cracking of the encapsulation can be caused by the influence of external environmental factors such as earthquake, ultraviolet irradiation, large day and night temperature difference and the like, so that the phenomena of interlayer or turn-to-turn insulation damage and the like can be caused. Therefore, the direct current resistance of the dry-type reactor needs to be tested, and the hidden danger of the dry-type reactor needs to be checked in time.
In the conventional technology, when testing the direct current resistance of the dry type reactor, the measurement method for the temperature of the dry type reactor mostly starts to measure by measuring the ambient temperature, assuming that the ambient temperature is the temperature of the dry type reactor. However, in order to obtain more accurate data, the dry-type reactor needs to be in an environment with stable weather conditions such as no sunlight, no wind, no rain or snow, and the like, so that certain accuracy can be ensured. However, the time for stable meteorological conditions to exist every day is limited, the dry-type reactor is short in detection blank window period, and the direct current resistance test of the dry-type reactor is seriously influenced due to the limitation of the meteorological conditions.
Disclosure of Invention
In view of the above, it is necessary to provide a dry reactor dc resistance test and state evaluation method, device and system capable of solving the problem that the dry reactor dc resistance test is limited by meteorological conditions.
In a first aspect, the present application provides a dry reactor direct current resistance testing and state evaluation method, including:
acquiring the ambient temperature of the dry-type reactor;
acquiring the acquired temperature of the dry-type reactor, and processing the temperature of the dry-type reactor to obtain the average temperature of the dry-type reactor;
according to the environment temperature and the average temperature of the dry type reactor, the temperature of the dry type reactor is adjusted so that the temperature of the dry type reactor and the environment temperature reach a heat exchange stable state;
acquiring a direct current resistance value of the dry type reactor when the temperature of the dry type reactor and the ambient temperature reach a heat exchange stable state;
and converting the direct current resistance value into an actual direct current resistance value of the dry-type reactor at the factory temperature, comparing the actual direct current resistance value with the factory direct current resistance value of the dry-type reactor, and evaluating the state of the dry-type reactor according to a comparison result.
In one embodiment, the acquiring the collected temperature of the dry reactor and processing the dry reactor temperature to obtain an average dry reactor temperature includes:
acquiring temperature data of the inner wall of the dry-type reactor, which is acquired by an inner wall sensor of the dry-type reactor;
acquiring dry reactor outer wall temperature data acquired by an outer wall sensor of a dry reactor;
abnormal data examination is carried out on the temperature data of the inner wall of the dry type electric reactor and the temperature data of the outer wall of the dry type electric reactor;
and selecting the maximum value and the minimum value from the temperature data of the inner wall of the dry type reactor and the temperature data of the outer wall of the dry type reactor after abnormal data examination to calculate the average value, so as to obtain the average temperature of the dry type reactor.
In one embodiment, the performing abnormal data investigation on the data of the temperature of the inner wall of the dry type reactor and the data of the temperature of the outer wall of the dry type reactor includes:
and according to the detection temperature deviation range corresponding to the environment temperature, carrying out abnormal data investigation on the temperature data of the inner wall of the dry-type electric reactor and the temperature data of the outer wall of the dry-type electric reactor.
In one embodiment, the temperature adjustment of the dry reactor according to the environment temperature and the average temperature of the dry reactor so that the temperature of the dry reactor and the environment temperature reach a heat exchange stable state includes:
if the ambient temperature is lower than the average temperature of the dry type reactor, the temperature of the dry type reactor and the ambient temperature reach a heat exchange stable state;
if the ambient temperature is greater than the average temperature of the dry-type reactor and the difference value between the ambient temperature and the average temperature of the dry-type reactor is within a set adjustable range, the temperature of the dry-type reactor and the ambient temperature do not reach a heat exchange stable state, current with a set amplitude is output to the dry-type reactor, the acquired temperature of the dry-type reactor is returned, and the temperature of the dry-type reactor is processed to obtain the average temperature of the dry-type reactor;
and if the ambient temperature is greater than the average temperature of the dry-type reactor and the difference value between the ambient temperature and the average temperature of the dry-type reactor is out of the set adjustable range, the temperature of the dry-type reactor and the ambient temperature do not exchange heat, the acquired temperature of the dry-type reactor is returned, and the temperature of the dry-type reactor is processed to obtain the average temperature of the dry-type reactor.
In one embodiment, the performing the state evaluation on the dry type reactor according to the comparison result includes:
when the deviation value of the actual direct current resistance value and the factory direct current resistance is smaller than or equal to a set deviation value, judging that the dry-type reactor is normal;
and when the deviation value of the actual direct current resistance value and the factory direct current resistance is larger than the set deviation value, judging that the dry-type reactor is abnormal, and outputting inspection prompt information.
In one embodiment, after the number of the dry reactors is two or more, the converting the dc resistance value into an actual dc resistance value of the dry reactor at a factory temperature, comparing the actual dc resistance value with a factory dc resistance value of the dry reactor, and evaluating a state of the dry reactor according to a comparison result, the method further includes:
calculating an arithmetic average value of actual direct current resistance values obtained by the current measurement of each dry-type reactor to obtain an actual direct current resistance average value;
calculating an arithmetic mean value of the outgoing direct current resistance values of the dry-type reactors to obtain an outgoing direct current resistance mean value;
respectively obtaining an actual direct current resistance variance and a factory direct current resistance variance according to the actual direct current resistance average value and the factory direct current resistance average value;
dividing the actual DC resistance variance by the factory DC resistance variance to obtain a variance ratio;
and comparing the variance ratio with a variance ratio threshold corresponding to the set confidence coefficient, and obtaining the whole test working error analysis of the current measurement of each dry-type reactor according to the comparison result.
In one embodiment, after the converting the dc resistance value into an actual dc resistance value of the dry reactor at a factory temperature, comparing the actual dc resistance value with a factory dc resistance value of the dry reactor, and performing state evaluation on the dry reactor according to a comparison result, the method further includes:
sequentially calculating difference values of the actual direct current resistance value obtained by the current measurement of the dry-type reactor and all the previous actual direct current resistance values, and calculating standard deviation of the difference values to obtain a detection value;
and comparing the detection value with a detection threshold corresponding to the set significance level, and evaluating and analyzing the running state of the dry type reactor according to the comparison result.
In a second aspect, the present application further provides a dry reactor dc resistance testing and state evaluating apparatus, including:
the environment temperature measuring module is used for acquiring the environment temperature of the dry type reactor;
the dry-type reactor temperature measuring module is used for acquiring the acquired dry-type reactor temperature and processing the dry-type reactor temperature to obtain the average dry-type reactor temperature;
the temperature adjusting module is used for adjusting the temperature of the dry type reactor according to the environment temperature and the average temperature of the dry type reactor so as to enable the temperature of the dry type reactor and the environment temperature to reach a heat exchange stable state;
the testing module is used for acquiring the direct current resistance value of the dry type electric reactor when the temperature of the dry type electric reactor and the environment temperature reach a heat exchange stable state;
and the analysis module is used for converting the direct current resistance value into an actual direct current resistance value of the dry-type reactor at the factory temperature, comparing the actual direct current resistance value with the factory direct current resistance value of the dry-type reactor, and evaluating the state of the dry-type reactor according to the comparison result.
In a third aspect, the application further provides a system for testing the direct current resistance and evaluating the state of the dry reactor, the system comprises a dry reactor direct current resistance testing device and a temperature sensor, the dry reactor direct current resistance testing device and the temperature sensor are in wireless connection, and the dry reactor direct current resistance testing device is used for testing the direct current resistance and evaluating the state of the dry reactor according to the method.
In one embodiment, the testing device for the direct current resistance of the dry type reactor comprises a shell, a testing port, a wireless communication unit, an environment temperature measuring unit, an interaction device and a control board, wherein the control board is arranged in the shell, the testing port, the environment temperature measuring unit and the interaction device are all arranged on the shell and connected with the control board, and the wireless communication unit is communicated with the temperature sensor and connected with the control board.
According to the method, the device and the system for testing and evaluating the direct current resistance of the dry-type reactor, the ambient temperature and the temperature of the dry-type reactor are obtained and compared, the test is started after the temperature of the dry-type reactor and the ambient temperature are adjusted to reach the heat exchange stable state, and then the direct current resistance value is calculated. Because the temperature of the dry-type reactor reaching the heat exchange stable state with the ambient temperature is directly obtained, the dry-type reactor is not limited by meteorological conditions any more, and the problem that the meteorological conditions influence the direct-current resistance testing efficiency of the dry-type reactor is solved.
Drawings
FIG. 1 is a diagram of an application environment of a method for testing the direct current resistance and evaluating the state of a dry reactor in one embodiment;
FIG. 2 is a schematic flow chart of a method for testing the direct current resistance and evaluating the state of the dry reactor in one embodiment;
FIG. 3 is a schematic flow chart illustrating the steps of acquiring the collected temperature of the dry reactor and processing the temperature of the dry reactor to obtain an average temperature of the dry reactor in one embodiment;
FIG. 4 is a schematic flow chart illustrating a process of adjusting the temperature of the dry reactor according to the ambient temperature and the average temperature of the dry reactor to make the temperature of the dry reactor and the ambient temperature reach a stable heat exchange state in one embodiment;
fig. 5 is a schematic flow chart illustrating that the dc resistance value is converted into an actual dc resistance value of the dry reactor at a factory temperature, the actual dc resistance value is compared with the factory dc resistance value of the dry reactor, and the dry reactor is subjected to state evaluation according to the comparison result in one embodiment;
FIG. 6 is a block diagram of a DC resistance testing and state evaluating device of a dry reactor in one embodiment;
fig. 7 is a schematic structural diagram of a dry reactor dc resistance testing device in the dry reactor dc resistance testing and condition evaluating system in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The method for testing the direct current resistance and evaluating the state of the dry-type reactor provided by the embodiment of the application can be applied to the application environment shown in fig. 1. The dry reactor 100 may be a dry reactor in a substation or a converter station, and the dry reactor 100 is provided with a terminal board 101. The temperature sensor 102 is arranged on the dry-type reactor 100, and can be arranged on the inner wall and the outer wall of the dry-type reactor 100, the dry-type reactor direct current resistance testing device 104 communicates with the temperature sensor 102 in a wireless connection mode, and data obtained by measurement of the temperature sensor 102 is obtained; the dry reactor dc resistance test device 104 is connected to the terminal board 101 of the dry reactor 100 by a wired connection to adjust the temperature of the dry reactor 100. The dry-type reactor direct current resistance testing device 104 comprises a shell, a testing port, a wireless communication unit, an environment temperature measuring unit, an interaction device and a control board, wherein the control board is arranged in the shell, the testing port, the environment temperature measuring unit and the interaction device are all arranged on the shell and connected with the control board, and the wireless communication unit is communicated with the temperature sensor 102 and connected with the control board. The wireless communication unit can receive the temperature of the dry reactor measured by the temperature sensor 102 and transmit the temperature to the control board, and the control board of the dry reactor direct current resistance testing device 104 calculates and analyzes various data. The interactive device may include function buttons for selecting functions to execute different commands and a display screen for displaying results of the calculations and analyses.
In one embodiment, as shown in fig. 2, a method for testing and evaluating the state of the dc resistance of a dry reactor is provided, which is described by taking the method as an example applied to the apparatus for testing the dc resistance of a dry reactor in fig. 1, and includes the following steps:
step 202, obtaining the ambient temperature of the dry type reactor.
Among them, the dry reactor is a circuit device capable of preventing current variation, and is usually wound in the form of a solenoid and has a hollow structure. The temperature of the air around the dry-type reactor is the ambient temperature. Specifically, the dry-type reactor direct-current resistance testing device and the dry-type reactor are arranged in the same environment, an environment temperature measuring unit is arranged on the dry-type reactor direct-current resistance testing device, and the unit can continuously measure the environment temperature and output the environment temperature value to a control board inside the dry-type reactor direct-current resistance testing device. Furthermore, the control panel can also correct the environmental temperature value according to environmental factors such as wind speed, sunlight and the like, and the corrected environmental temperature is obtained and used for subsequent data analysis.
And 204, acquiring the acquired dry-type reactor temperature, and processing the dry-type reactor temperature to obtain the average dry-type reactor temperature.
The temperature sensors are arranged on the inner wall and the outer wall of the dry type reactor, temperature data obtained by each temperature sensor is the temperature of the dry type reactor, and the average temperature of the dry type reactor is obtained after the temperature data is processed by the direct current resistance testing device of the dry type reactor.
Specifically, before testing the temperature of the dry-type reactor, if the dry-type reactor in operation in the line is tested, the lead on any side of the dry-type reactor needs to be removed first to disconnect the dry-type reactor from the working circuit. When measuring, an operator needs to arrange the temperature sensor on the inner wall and the outer wall of the dry-type reactor, and establish wireless communication connection between the temperature sensor and the dry-type reactor direct-current resistance testing device, so that the temperature of the dry-type reactor can be obtained. The temperature of the dry-type reactor measured by the temperature sensor is received and transmitted to the control board by the wireless communication unit of the dry-type reactor direct-current resistance testing device, the control board processes the temperature of the dry-type reactor according to the set abnormal data checking condition, and then the average temperature of the dry-type reactor is obtained from the processed temperature of the dry-type reactor.
Further, the temperature sensor should be a wireless temperature sensor, e.g. a thermocouple sensor. The arrangement mode of the temperature sensors on the dry-type reactor can be pasting, in order to ensure stable and reliable data, the number of the temperature sensors is not less than two, the temperature sensors are arranged at a certain distance from the edge of the dry-type reactor, and the arrangement of the temperature sensors on the dry-type reactor is uniform, for example, the temperature sensors can be arranged in a matrix mode of 6 rows and 8 columns.
And step 206, according to the environment temperature and the average temperature of the dry-type reactor, adjusting the temperature of the dry-type reactor so as to enable the temperature of the dry-type reactor and the environment temperature to reach a heat exchange stable state.
The temperature of the dry-type reactor is regulated by outputting current with a certain amplitude to the dry-type reactor so as to change the temperature of the dry-type reactor; the heat exchange stable state means that after two objects with different temperatures are contacted with each other, energy transfer occurs between the objects, the temperature difference is gradually reduced until thermal balance is achieved, and when the temperature of the dry-type electric reactor is higher than the ambient temperature, the temperature of the dry-type electric reactor and the ambient temperature can be judged to reach the heat exchange stable state.
Specifically, the dry-type reactor direct-current resistance testing device is provided with testing ports which are respectively a current output end, a voltage input end and a current input end, the testing ports are connected with connecting wires and are respectively connected to wiring boards at the head end and the tail end of the dry-type reactor by an external connection method, the dry-type reactor direct-current resistance testing device compares the obtained ambient temperature with the average temperature of the dry-type reactor, whether the temperature of the dry-type reactor and the ambient temperature reach a heat exchange stable state at the moment is judged according to a comparison result of the ambient temperature and the average temperature of the dry-type reactor, and if the temperature does not reach the heat exchange stability, the dry-type reactor outputs a set adjusting current so as to achieve temperature adjustment.
And step 208, acquiring the direct current resistance value of the dry type reactor when the temperature of the dry type reactor and the ambient temperature reach a heat exchange stable state.
Specifically, when the temperature of the dry-type reactor and the ambient temperature reach a heat exchange stable state, the dry-type reactor direct-current resistance testing device is connected with the dry-type reactor through the testing port to obtain actual testing voltage and actual testing current of the dry-type reactor at the moment, and the actual testing voltage is divided by the actual testing current to obtain a direct-current resistance value of the dry-type reactor.
And 209, converting the direct current resistance value into an actual direct current resistance value of the dry type reactor at the factory temperature, comparing the actual direct current resistance value with the factory direct current resistance value of the dry type reactor, and evaluating the state of the dry type reactor according to the comparison result.
After the dry-type reactor is manufactured, a direct-current resistance value is obtained through experiments at a factory temperature, and the value is generally used as a reference value for measuring the direct-current resistance of the dry-type reactor.
Specifically, the formula for converting the dc resistance value of the dry reactor into the actual dc resistance value of the dry reactor at the factory temperature is as follows:
wherein: r Conversion The actual direct current resistance value of the dry type reactor obtained by the current test at the factory temperature is obtained by conversion of the direct current resistance value, and the unit is m omega; r Measured actually The direct current resistance value of the dry type reactor measured at the environmental temperature in the test is represented, and the unit is m omega; tc represents the average temperature of the dry-type reactor body in a factory test, and the unit is ℃; t is a unit of Measuring The average temperature of the reactor body when the dry-type reactor is tested at this time is shown, and the unit is ℃.
And calculating the difference value between the actual direct current resistance value and the delivery direct current resistance value of the dry-type reactor at the delivery temperature after the actual direct current resistance value of the dry-type reactor is obtained through the calculation of the formula, and dividing the obtained difference value by the delivery direct current resistance value to obtain the resistance deviation value. When the resistance deviation value is less than or equal to 1%, the working normality of the dry type reactor tested at this time can be evaluated; when the resistance deviation value is larger than 1%, the working abnormality of the dry-type reactor tested at this time can be evaluated, and prompt information can be sent out in an interaction device of the dry-type reactor direct-current resistance testing device to prompt an operator to check a lead of the dry-type reactor.
In the method for testing and evaluating the direct current resistance of the dry type reactor, the temperature of the dry type reactor is detected by using the sensor arranged on the dry type reactor, the temperature of the dry type reactor is accurately measured, and the temperature of the dry type reactor is adjusted by comparing with the ambient temperature so as to achieve the stable state of heat exchange, thereby accurately completing the direct current resistance test of the dry type reactor. Because the temperature of the dry-type reactor reaching the heat exchange stable state with the ambient temperature is directly obtained, the dry-type reactor is not limited by meteorological conditions any more, and the problem that the meteorological conditions influence the direct-current resistance test efficiency of the dry-type reactor is solved.
The plurality of temperature sensors acquire temperature data of the plurality of dry type reactors, and in one embodiment, the acquired dry type reactor temperature is acquired, and the dry type reactor temperature is processed to obtain an average dry type reactor temperature, including step 302, step 304, step 306 and step 308.
And step 302, acquiring temperature data of the inner wall of the dry type reactor, which is acquired by an inner wall sensor of the dry type reactor.
And step 304, acquiring dry reactor outer wall temperature data acquired by an outer wall sensor of the dry reactor.
Specifically, the dry-type reactor direct current resistance testing device obtains the temperature sensor information received by the wireless communication unit, and obtains dry-type reactor temperature data collected by each sensor on the inner wall and the outer wall.
And step 306, performing abnormal data investigation on the temperature data of the inner wall of the dry-type electric reactor and the temperature data of the outer wall of the dry-type electric reactor.
Specifically, the temperature sensor may cause distortion of the temperature value of the dry reactor obtained through the test due to improper setting or a fault of the temperature sensor, and at this time, abnormal data examination needs to be performed on the temperature data. The temperature difference obtained by testing is large due to the fact that the difference of air flowing degrees of the temperature sensor arranged on the outer wall and the temperature sensor arranged on the inner wall is large, and abnormal data examination needs to be conducted on the temperature data of the outer wall of the dry type electric reactor and the temperature data of the inner wall of the dry type electric reactor separately.
And 308, selecting the maximum value and the minimum value from the temperature data of the inner wall of the dry-type electric reactor and the temperature data of the outer wall of the dry-type electric reactor after abnormal data checking to obtain the average temperature of the dry-type electric reactor.
Specifically, after abnormal data is checked, a maximum value and a minimum value are selected from the temperature data of the inner wall of the dry-type electric reactor and the temperature data of the outer wall of the dry-type electric reactor, and the average value obtained from the selected maximum value and the selected minimum value is the average temperature of the dry-type electric reactor at the environmental temperature in the test.
In the embodiment, the temperature sensor arranged on the dry-type reactor is used for collecting the temperature data of the inner wall of the dry-type reactor and the temperature data of the outer wall of the dry-type reactor and respectively checking the abnormal data of the temperature data of the inner wall of the dry-type reactor and the temperature data of the outer wall of the dry-type reactor, so that the obtained average temperature of the dry-type reactor is more accurate, and the effect of more accurately testing the direct current resistance of the dry-type reactor in the follow-up process is achieved.
In one embodiment, the abnormal data examination of the temperature data of the inner wall of the dry type reactor and the temperature data of the outer wall of the dry type reactor comprises the following steps: and according to the detection temperature deviation range corresponding to the environment temperature, carrying out abnormal data investigation on the temperature data of the inner wall of the dry-type electric reactor and the temperature data of the outer wall of the dry-type electric reactor.
Specifically, an internal offset range which can be adjusted according to the use environment is arranged in the dry-type reactor direct-current resistance testing device, and the internal offset range of the temperature of the inner wall of the dry-type reactor and the temperature of the outer wall of the dry-type reactor can be set to be different ranges. And respectively obtaining an inner wall temperature arithmetic mean value and an outer wall temperature arithmetic mean value according to the received dry reactor inner wall temperature data and the dry reactor outer wall temperature data, obtaining deviation values of the temperature data and the corresponding temperature arithmetic mean values, and if the deviation values are larger than a set internal detection deviation range, determining the temperature data as abnormal data and rejecting the abnormal data as invalid data. Furthermore, when the dry-type reactor direct current resistance testing device eliminates abnormal values, abnormal information can be prompted on a display screen of the dry-type reactor direct current resistance testing device, so that an operator can conveniently and timely troubleshoot faults.
In this embodiment, the temperature difference of the actual measurement environment is fully considered by setting the inner detection deviation ranges for the temperature of the inner wall of the dry-type reactor and the temperature of the outer wall of the dry-type reactor respectively, so that the effect of accurately eliminating abnormal data is achieved.
In one embodiment, as shown in FIG. 4, step 206 may include step 402, step 404, and step 406.
And step 402, if the ambient temperature is less than the average temperature of the dry-type reactor, the temperature of the dry-type reactor and the ambient temperature reach a heat exchange stable state.
Step 404, if the ambient temperature is greater than the average temperature of the dry type reactor and the difference between the ambient temperature and the average temperature of the dry type reactor is within the set adjustable range, the temperature of the dry type reactor and the ambient temperature do not reach the heat exchange stable state, a current with a set amplitude is output to the dry type reactor, and the step 204 is returned to.
Specifically, the dry-type reactor direct-current resistance testing device compares the ambient temperature with the average temperature of the dry-type reactor, and when the ambient temperature is greater than the average temperature of the dry-type reactor and the difference between the ambient temperature and the average temperature of the dry-type reactor is within a set adjustable range, the temperature of the dry-type reactor and the ambient temperature do not reach a heat exchange stable state, the dry-type reactor direct-current resistance testing device is required to heat the dry-type reactor, namely, current with a set amplitude is output to the dry-type reactor, so that the temperature of the dry-type reactor rises to reach the heat exchange stable state.
Further, the set adjustable range may be less than 5 degrees celsius; the current of the set amplitude for temperature rise may be 40A; in the heat exchange steady state in this case, the dry reactor direct current resistance testing device is required to raise the temperature of the dry reactor until the ambient temperature is less than the average temperature of the dry reactor and the difference between the ambient temperature and the average temperature of the dry reactor is equal to or greater than 2 ℃.
And step 406, if the ambient temperature is greater than the average temperature of the dry-type reactor and the difference value between the ambient temperature and the average temperature of the dry-type reactor is out of the set adjustable range, the temperature of the dry-type reactor and the ambient temperature do not exchange heat, and the process returns to the step 204.
Specifically, the dry reactor direct current resistance testing device compares the ambient temperature with the average temperature of the dry reactor, and when the ambient temperature is greater than the average temperature of the dry reactor and the difference between the ambient temperature and the average temperature of the dry reactor is outside the set adjustable range, it can be considered that the dry reactor temperature and the ambient temperature do not exchange heat, and the data obtained by heating the dry reactor through the dry reactor direct current resistance testing device is not accurate enough and does not meet the testing conditions. At the moment, the difference value between the dry type reactor and the environment temperature is waited for changing until the test condition is met and the test is carried out again.
In the embodiment, the temperature of the dry-type reactor and the environmental temperature reach the heat exchange stable state through adjusting the temperature of the dry-type reactor, and then the test is started, so that the direct current resistance test of the dry-type reactor is not influenced by the environmental temperatures with different meteorological conditions, and the problem that the direct current resistance test of the dry-type reactor is limited by the meteorological conditions is solved.
In one embodiment, in step 209, performing state evaluation on the dry reactor according to the comparison result includes: and when the deviation value of the actual direct current resistance value and the factory direct current resistance is smaller than or equal to the set deviation value, judging that the dry-type reactor is normal. And when the deviation value of the actual direct current resistance value and the factory direct current resistance is larger than the set deviation value, judging that the dry-type reactor is abnormal, and outputting inspection prompt information.
Specifically, factory direct current resistance data input by an operator are stored in the dry-type reactor direct current resistance testing device, when the dry-type reactor direct current resistance testing device obtains an actual direct current resistance value through calculation, the actual direct current resistance value is compared with the factory direct current resistance of the dry-type reactor, a difference value between the actual direct current resistance value and the factory direct current resistance is obtained, and the difference value is divided by the factory direct current resistance to obtain a direct current resistance deviation value. When the direct current resistance deviation value is smaller than or equal to the set deviation value, the dry reactor direct current resistance testing device judges that the resistance value of the direct current resistance of the dry reactor is normal and the dry reactor works normally; when the direct current resistance deviation value is larger than the set deviation value, the dry type reactor direct current resistance testing device judges that the direct current resistance value of the dry type reactor is abnormal, the dry type reactor works abnormally, and the lead of the dry type reactor needs to be checked. And when the test result is abnormal, the dry-type reactor direct current resistance testing device outputs detection prompt information.
Further, the set deviation value can be 2% or other values, and is usually 1%; the dry-type reactor direct current resistance testing device outputs detection prompt information, the mode of outputting the detection prompt information is not unique, information prompt can be carried out through at least one of an indicator light, a display screen and a loudspeaker, and the prompt mode comprises one or more of sound, light, patterns and characters.
In one embodiment, as shown in fig. 5, when the number of the dry reactors is two or more, step 209 further includes step 502, step 504, step 506, step 508, and step 509.
And 502, calculating an arithmetic average value of actual direct current resistance values obtained by the current measurement of each dry-type reactor to obtain an actual direct current resistance average value.
And step 504, calculating an arithmetic average value of the outgoing direct current resistance values of the dry-type reactors to obtain the outgoing direct current resistance average value.
And step 506, respectively obtaining the actual direct current resistance variance and the factory direct current resistance variance according to the actual direct current resistance average value and the factory direct current resistance average value.
The variance is a sample variance, the actual direct current resistance value obtained by current measurement of each dry-type reactor is set as a sample data set, the outgoing direct current resistance value of each dry-type reactor is set as a sample data set, and a sample variance formula is respectively applied as follows:
wherein: s represents the square of the standard deviation, i.e. the variance; x i An ith data value represented in a sample data set; x av Represents the arithmetic mean of all data in one sample data set; n represents the number of data in one sample data set.
And step 508, dividing the actual direct current resistance variance by the factory direct current resistance variance to obtain a variance ratio.
The variance ratio is used to perform an F-test, also called variance ratio test, which is generally used to analyze a statistical model using more than one parameter to determine whether all or a portion of the parameters in the model are suitable.
And 509, comparing the variance ratio with a variance ratio threshold corresponding to the set confidence coefficient, and obtaining the overall test working error analysis of the current measurement of each dry-type reactor according to the comparison result.
Wherein, the confidence level is the confidence level of the selected F test, usually percentage, which is the probability that the overall parameter value falls within a certain area of the sample statistic; the variance ratio threshold value corresponding to the set confidence degree refers to the error range between the sample statistic value and the overall parameter value under a certain confidence level, and can be obtained by table lookup.
Specifically, the variance ratio is compared with a variance ratio threshold corresponding to the set confidence, if the variance ratio is larger, the overall test working error of each dry-type reactor measured at this time is larger, and the dry-type reactor direct-current resistance test device outputs prompt information to prompt the retest of the dry-type reactor test result with larger deviation compared with the factory value; if the variance ratio is smaller, the working error of the whole test of the current measurement of each dry-type reactor is smaller, and the reliability of the whole test data is higher.
Further, the confidence level may be set to 95%, where F is obtained 0.05(N-1,N-1) Value, comparison variance ratio and F 0.05(N-1,N-1) If the variance ratio is larger, the overall test working error of each dry-type reactor measured at this time is larger, and the dry-type reactor test result with larger deviation compared with the factory value needs to be retested; if the variance ratio is smaller, the working error of the whole test of the current measurement of each dry-type reactor is smaller, and the reliability of the whole test data is higher.
In the embodiment, whether the whole test result of the current measurement is reliable or not is judged by analyzing the error of the whole test work of the current measurement of each dry-type reactor, the test result of the dry-type reactor with larger deviation can be checked, retest is prompted, and the accuracy of the whole test result of the current measurement is improved.
In one embodiment, step 209 is followed by: sequentially calculating difference values of the actual direct current resistance value obtained by the current measurement of the dry-type reactor and all the previous actual direct current resistance values, and calculating standard deviation of the difference values to obtain a detection value; and comparing the detection value with a detection threshold corresponding to the set significance level, and evaluating and analyzing the operation state of the dry-type reactor according to the comparison result.
Wherein, the detection value is t test, and the t test is to deduce the probability of difference by using t distribution theory, thereby comparing whether the difference between the two averages is significant. Specifically, the standard deviation formula is:
wherein: s d The standard deviation of all direct current resistance detection values of the dry type reactor is represented; d is a radical of i An ith data value in all DC resistance detection values of the dry type reactor; d is a radical of Average The average value of all direct current resistance detection values of the dry type reactor is represented; n represents the number of data in all the detected values of the direct current resistance of the dry type reactor.
And (3) calculating a detection value of the obtained standard deviation:
wherein: t represents a detection value in the t-test.
And comparing the detection value with a detection threshold corresponding to the set significance level, and evaluating and analyzing the operation state of the dry type reactor according to the comparison result.
Wherein, the t test has a corresponding boundary value table, and the t test conclusion can be obtained by setting different significance levels and comparing the significance levels with corresponding detection threshold values. Specifically, the detection value is compared with a detection threshold corresponding to the set significance level, and if the detection value is smaller, a conclusion that the dry-type reactor is in a good running state can be obtained; if the detection value is large, the dry type reactor can be judged to be in a poor operation state, and the dry type reactor direct current resistance testing device outputs prompt information to prompt that the inspection and the detection of the dry type reactor are strengthened.
Further, the significance level may be set to 0.05, at which time t may be obtained 4,0.05 =2.78, comparing the detected value with t 4,0.05 If the detection value is small, it can be concluded that the operation state of the dry-type reactor is good =2.78(ii) a If the detection value is large, the dry type reactor can be judged to be in a poor operation state, and the dry type reactor needs to be subjected to enhanced inspection and detection.
In this embodiment, the operation state of the dry-type reactor is evaluated and analyzed through the actual dc resistance value obtained by the current measurement of the dry-type reactor and all the actual dc resistance values in the past, so that the operation state conclusion of the dry-type reactor is obtained, and the dry-type reactor fault can be found in time.
This application is through pasting the wireless thermocouple temperature sensor on the dry-type reactor inside and outside wall, wireless communication unit and environment temperature measurement unit, realize the accurate test to ambient temperature and dry-type reactor temperature, after the size of control panel analysis comparison ambient temperature and dry-type reactor temperature in the dry-type reactor direct current resistance testing arrangement, decide whether need for the dry-type reactor intensification of being tested, and realize the accurate measurement to the direct current resistance value of dry-type reactor, the processing analysis of test data of control panel in the dry-type reactor direct current resistance testing arrangement of rethread, and combine the direct current resistance value and the test direct current resistance value of leaving the factory of this test one or more dry-type reactors, can reach and appraise respectively the running state of this test's whole test effect and single reactor.
The application passes an ambient temperature test; and accurately measuring the temperature of each position of the dry-type reactor by using the thermocouple sensor matrixes on the inner and outer cylinder walls of the dry-type reactor body, and calculating the average temperature of the dry-type reactor. The temperature difference between the environment temperature and the average temperature of the dry-type reactor is compared to judge whether the temperature of the dry-type reactor needs to be increased and select the temperature-increasing current, so that the accuracy of the direct-current resistance test of the dry-type reactor is improved, and the problem that the temperature of the dry-type reactor is difficult to accurately measure in a field test is solved. F detection analysis and t detection analysis are carried out on the past test data of the dry-type electric reactors, and whether the overall test result of the current measurement is reliable or not is obtained by analyzing the error of the overall test work of the current measurement of each dry-type electric reactor; and evaluating and analyzing the running state of the dry-type reactor through the actual direct-current resistance value obtained by the measurement of the dry-type reactor and all the previous actual direct-current resistance values to obtain a dry-type reactor running state conclusion.
It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, the embodiment of the application also provides a dry-type reactor direct-current resistance testing and state evaluating device for realizing the dry-type reactor direct-current resistance testing and state evaluating method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the method, so specific limitations in one or more embodiments of the dry reactor direct current resistance testing and state evaluating device provided below can be referred to the limitations of the dry reactor direct current resistance testing and state evaluating method in the above, and details are not repeated here.
In one embodiment, as shown in fig. 6, there is provided a dry reactor dc resistance testing and state evaluating apparatus including: an environment temperature measuring module 602, a dry reactor temperature measuring module 604, a temperature adjusting module 606, a testing module 608 and an analyzing module 609, wherein:
and the ambient temperature measuring module 602 is configured to obtain an ambient temperature of the dry type reactor.
And the dry-type reactor temperature measuring module 604 is used for acquiring the acquired dry-type reactor temperature and processing the dry-type reactor temperature to obtain the average dry-type reactor temperature.
And the temperature adjusting module 606 is used for adjusting the temperature of the dry type reactor according to the ambient temperature and the average temperature of the dry type reactor, so that the temperature of the dry type reactor and the ambient temperature reach a heat exchange stable state.
The testing module 608 is configured to obtain a dc resistance value of the dry type reactor when the temperature of the dry type reactor and the ambient temperature reach a heat exchange stable state.
And the analysis module 609 is configured to convert the dc resistance value into an actual dc resistance value of the dry reactor at a factory temperature, compare the actual dc resistance value with the factory dc resistance value of the dry reactor, and perform state evaluation on the dry reactor according to a comparison result.
In one embodiment, the dry reactor temperature measurement module 604 is configured to obtain dry reactor inner wall temperature data collected by an inner wall sensor of the dry reactor; acquiring temperature data of the outer wall of the dry type electric reactor, which is acquired by an outer wall sensor of the dry type electric reactor; abnormal data examination is carried out on the temperature data of the inner wall of the dry type electric reactor and the temperature data of the outer wall of the dry type electric reactor; and selecting the maximum value and the minimum value from the temperature data of the inner wall of the dry-type reactor and the temperature data of the outer wall of the dry-type reactor after abnormal data investigation to calculate the average value, so as to obtain the average temperature of the dry-type reactor.
In one embodiment, the dry reactor temperature measurement module 604 is configured to perform abnormal data checking on the dry reactor inner wall temperature data and the dry reactor outer wall temperature data according to a detection temperature deviation range corresponding to an ambient temperature when performing abnormal data checking on the dry reactor inner wall temperature data and the dry reactor outer wall temperature data.
In one embodiment, the temperature adjustment module 606 is configured to, if the ambient temperature is less than the average temperature of the dry reactor, reach a heat exchange steady state with the ambient temperature; if the ambient temperature is greater than the average temperature of the dry-type reactor and the difference value between the ambient temperature and the average temperature of the dry-type reactor is within a set adjustable range, the temperature of the dry-type reactor and the ambient temperature do not reach a heat exchange stable state, current with a set amplitude is output to the dry-type reactor, the acquired temperature of the dry-type reactor is returned, and the temperature of the dry-type reactor is processed to obtain the average temperature of the dry-type reactor; and if the ambient temperature is greater than the average temperature of the dry-type reactor and the difference value between the ambient temperature and the average temperature of the dry-type reactor is out of the set adjustable range, the temperature of the dry-type reactor and the ambient temperature do not exchange heat, the acquired temperature of the dry-type reactor is returned, and the temperature of the dry-type reactor is processed to obtain the average temperature of the dry-type reactor.
In one embodiment, the analyzing module 609 is configured to determine that the dry reactor is normal when a deviation value between the actual dc resistance value and the factory dc resistance is smaller than or equal to a set deviation value; and when the deviation value of the actual direct current resistance value and the factory direct current resistance is larger than the set deviation value, judging that the dry-type reactor is abnormal, and outputting inspection prompt information.
In one embodiment, the number of the dry reactors is two or more, and the analysis module 609 is further configured to calculate an average value of actual dc resistances obtained by the current measurement of each dry reactor to obtain an average value of the actual dc resistances; calculating an arithmetic mean value of the outgoing direct current resistance values of the dry-type reactors to obtain an outgoing direct current resistance mean value; respectively obtaining an actual direct current resistance variance and a factory direct current resistance variance according to the actual direct current resistance average value and the factory direct current resistance average value; dividing the actual DC resistance variance by the factory DC resistance variance to obtain a variance ratio; and comparing the variance ratio with a variance ratio threshold corresponding to the set confidence coefficient, and obtaining the whole test working error analysis of the current measurement of each dry-type reactor according to the comparison result.
In an embodiment, the analyzing module 609 is further configured to sequentially calculate difference values between the actual dc resistance value obtained by the current measurement of the dry-type reactor and all the previous actual dc resistance values, and calculate a standard deviation from the difference values to obtain a detection value; and comparing the detection value with a detection threshold corresponding to the set significance level, and evaluating and analyzing the operation state of the dry-type reactor according to the comparison result.
All or part of each module in the dry-type reactor direct current resistance testing and state evaluating device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, the dry reactor direct current resistance testing and state evaluation system comprises a dry reactor direct current resistance testing device and a temperature sensor, wherein the dry reactor direct current resistance testing device and the temperature sensor are in wireless connection, and the dry reactor direct current resistance testing device is used for performing direct current resistance testing and state evaluation on the dry reactor by the method.
Specifically, the temperature sensor is arranged on the dry-type reactor to measure the temperature of the dry-type reactor, and the measured temperature of the dry-type reactor is wirelessly transmitted to the dry-type reactor direct current resistance testing device.
In one embodiment, as shown in fig. 7, the testing apparatus for the direct current resistance of the dry reactor includes a housing 710, a testing port 720, a wireless communication unit 730, an environment temperature measuring unit 740, an interaction apparatus 750, and a control board, wherein the control board is disposed in the housing, the testing port 720, the environment temperature measuring unit 740, and the interaction apparatus 750 are disposed on the housing and connected to the control board, and the wireless communication unit 730 is in communication with the temperature sensor and connected to the control board.
Specifically, the wireless communication unit 730 is divided into an inner wall communication unit 732 and an outer wall communication unit 734, the wireless mode can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies, and is respectively communicated with the temperature sensor arranged on the inner wall and the temperature sensor arranged on the outer wall, and the dry reactor direct current resistance testing device obtains the temperature of the dry reactor through the wireless communication unit 730; the environment temperature measuring unit 740 on the shell 710 of the dry reactor direct current resistance testing device can obtain the environment temperature. The test ports 720 on the dry reactor direct current resistance test device shell 710 are respectively a current output end 722, a voltage output end 724, a voltage input end 726 and a current input end 728, the test ports 720 are connected with a wiring board of the dry reactor, when an oxide layer or dirt exists on the wiring board, the voltage wiring position can be changed, and the position with the minimum voltage is selected to be connected according to the actual situation of the dry reactor. When the control board in the dry-type reactor direct-current resistance testing device receives the temperature of the dry-type reactor and the ambient temperature, the average temperature of the dry-type reactor obtained by the operation of the control board is compared with the ambient temperature, and the control board determines whether to output current to the testing port 720 or not and the amplitude of the output current according to the comparison result. The control board collects and calculates actual test voltage and actual test current through the test port 720 to obtain a direct current resistance value of the dry reactor. The direct current resistance value of the dry-type electric reactor can be applied to analyzing the error of the whole test work of each dry-type electric reactor measured at this time, judging whether the whole test result of the measurement is reliable or not, and checking out the test result of the dry-type electric reactor with larger deviation; the method can also be applied to the evaluation and analysis of the operation state of the dry-type reactor, and the conclusion of the operation state of the dry-type reactor is obtained. The above test results can be displayed in the interactive device 750 on the dry reactor dc resistance test device, the interactive device 750 includes a display screen 752 and function buttons 754, the display screen 752 is used for displaying information, the function buttons 754 are used for adjusting display information, selecting functions, calling data, etc., for example, the upper, lower, left and right selection of a display page, the setting and adjustment of contents such as time, date, and tested items in the instrument, the checking, storing and deleting operations of stored data of the instrument, the selection of the setting of the output current of the instrument, etc. are realized. In addition, the dry-type reactor direct-current resistance testing device is also provided with a grounding port 760 for ensuring the safety of the dry-type reactor direct-current resistance testing device and testing personnel during testing.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A dry reactor direct current resistance test and state evaluation method is characterized by comprising the following steps:
acquiring the ambient temperature of the dry-type reactor;
acquiring the acquired temperature of the dry-type reactor, and processing the temperature of the dry-type reactor to obtain the average temperature of the dry-type reactor;
according to the environment temperature and the average temperature of the dry type reactor, the temperature of the dry type reactor is adjusted so that the temperature of the dry type reactor and the environment temperature reach a heat exchange stable state;
acquiring a direct current resistance value of the dry type reactor when the temperature of the dry type reactor and the ambient temperature reach a heat exchange stable state;
and converting the direct current resistance value into an actual direct current resistance value of the dry-type reactor at the factory temperature, comparing the actual direct current resistance value with the factory direct current resistance value of the dry-type reactor, and performing state evaluation on the dry-type reactor according to a comparison result.
2. The method of claim 1, wherein the obtaining the collected dry reactor temperature and processing the dry reactor temperature to obtain a dry reactor average temperature comprises:
acquiring temperature data of the inner wall of the dry-type reactor, which is acquired by an inner wall sensor of the dry-type reactor;
acquiring temperature data of the outer wall of the dry type electric reactor, which is acquired by an outer wall sensor of the dry type electric reactor;
abnormal data examination is carried out on the temperature data of the inner wall of the dry type electric reactor and the temperature data of the outer wall of the dry type electric reactor;
and selecting the maximum value and the minimum value from the temperature data of the inner wall of the dry-type reactor and the temperature data of the outer wall of the dry-type reactor after abnormal data investigation to calculate the average value, so as to obtain the average temperature of the dry-type reactor.
3. The method according to claim 2, wherein the performing abnormal data investigation on the dry reactor inner wall temperature data and the dry reactor outer wall temperature data comprises:
and according to the detection temperature deviation range corresponding to the environment temperature, carrying out abnormal data investigation on the temperature data of the inner wall of the dry-type electric reactor and the temperature data of the outer wall of the dry-type electric reactor.
4. The method according to claim 1, wherein the temperature adjusting the dry type reactor according to the environment temperature and the dry type reactor average temperature to make the temperature of the dry type reactor reach a heat exchange stable state with the environment temperature comprises:
if the ambient temperature is lower than the average temperature of the dry type reactor, the temperature of the dry type reactor and the ambient temperature reach a heat exchange stable state;
if the ambient temperature is greater than the average temperature of the dry-type reactor and the difference value between the ambient temperature and the average temperature of the dry-type reactor is within a set adjustable range, the temperature of the dry-type reactor and the ambient temperature do not reach a heat exchange stable state, current with a set amplitude is output to the dry-type reactor, the acquired temperature of the dry-type reactor is returned, and the temperature of the dry-type reactor is processed to obtain the average temperature of the dry-type reactor;
and if the ambient temperature is greater than the average temperature of the dry-type reactor and the difference value between the ambient temperature and the average temperature of the dry-type reactor is out of the set adjustable range, the temperature of the dry-type reactor and the ambient temperature do not exchange heat, the acquired temperature of the dry-type reactor is returned, and the temperature of the dry-type reactor is processed to obtain the average temperature of the dry-type reactor.
5. The method according to claim 1, wherein the performing the state evaluation of the dry reactor according to the comparison result includes:
when the deviation value of the actual direct current resistance value and the factory direct current resistance is smaller than or equal to a set deviation value, judging that the dry-type reactor is normal;
and when the deviation value of the actual direct current resistance value and the factory direct current resistance is larger than the set deviation value, judging that the dry-type reactor is abnormal, and outputting inspection prompt information.
6. The method according to claim 1, wherein the number of the dry reactor is two or more, the converting the dc resistance value into an actual dc resistance value of the dry reactor at a factory temperature, comparing the actual dc resistance value with a factory dc resistance value of the dry reactor, and performing a state evaluation of the dry reactor based on a result of the comparing further comprises:
calculating an arithmetic average value of actual direct current resistance values obtained by the current measurement of each dry-type reactor to obtain an actual direct current resistance average value;
calculating an arithmetic mean value of the outgoing direct current resistance values of the dry-type reactors to obtain an outgoing direct current resistance mean value;
respectively obtaining an actual direct current resistance variance and a factory direct current resistance variance according to the actual direct current resistance average value and the factory direct current resistance average value;
dividing the actual DC resistance variance by the factory DC resistance variance to obtain a variance ratio;
and comparing the variance ratio with a variance ratio threshold corresponding to the set confidence coefficient, and obtaining the whole test working error analysis of the current measurement of each dry-type reactor according to the comparison result.
7. The method according to claim 1, wherein the converting the dc resistance value into an actual dc resistance value of the dry reactor at a factory temperature, comparing the actual dc resistance value with a factory dc resistance value of the dry reactor, and after performing a state evaluation of the dry reactor according to a comparison result, further comprises:
sequentially calculating difference values of the actual direct current resistance value obtained by the current measurement of the dry-type reactor and all the previous actual direct current resistance values, and calculating standard deviation of the difference values to obtain a detection value;
and comparing the detection value with a detection threshold corresponding to the set significance level, and evaluating and analyzing the running state of the dry type reactor according to the comparison result.
8. A dry reactor dc resistance testing and condition evaluation apparatus, the apparatus comprising:
the environment temperature measuring module is used for acquiring the environment temperature of the dry type reactor;
the dry-type reactor temperature measuring module is used for acquiring the acquired dry-type reactor temperature and processing the dry-type reactor temperature to obtain the average dry-type reactor temperature;
the temperature adjusting module is used for adjusting the temperature of the dry type reactor according to the environment temperature and the average temperature of the dry type reactor so as to enable the temperature of the dry type reactor and the environment temperature to reach a heat exchange stable state;
the testing module is used for acquiring the direct current resistance value of the dry type electric reactor when the temperature of the dry type electric reactor and the environment temperature reach a heat exchange stable state;
and the analysis module is used for converting the direct current resistance value into an actual direct current resistance value of the dry-type reactor at the factory temperature, comparing the actual direct current resistance value with the factory direct current resistance value of the dry-type reactor, and evaluating the state of the dry-type reactor according to the comparison result.
9. A dry reactor dc resistance test and condition evaluation system, comprising a dry reactor dc resistance test device and a temperature sensor, wherein the dry reactor dc resistance test device and the temperature sensor are wirelessly connected, and the dry reactor dc resistance test device is configured to perform dc resistance test and condition evaluation on the dry reactor according to any one of the methods of claims 1 to 7.
10. The system according to claim 9, wherein the dry reactor direct current resistance testing device comprises a casing, a testing port, a wireless communication unit, an environment temperature measuring unit, an interaction device and a control board, the control board is arranged in the casing, the testing port, the environment temperature measuring unit and the interaction device are all arranged on the casing and connected with the control board, and the wireless communication unit is communicated with the temperature sensor and connected with the control board.
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