CN114264390A - Method and device for monitoring temperature of phase-shifting transformer of frequency converter and electronic equipment - Google Patents
Method and device for monitoring temperature of phase-shifting transformer of frequency converter and electronic equipment Download PDFInfo
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Abstract
The embodiment of the application discloses a method and a device for monitoring the temperature of a phase-shifting transformer of a frequency converter and electronic equipment, wherein the method comprises the following steps: acquiring the acquisition temperature of a phase-shifting transformer of a frequency converter; obtaining the moving average temperature of the frequency converter phase-shifting transformer; obtaining the jump temperature of the frequency converter phase-shifting transformer; determining whether the moving average temperature meets a first type of alarm condition, and triggering a first type of alarm under the condition that the first type of alarm condition is met; and determining whether the jump temperature meets a second type of alarm condition, and triggering a second type of alarm under the condition that the second type of alarm condition is met. The method and the device have the advantages that firstly, the moving average temperature is obtained according to the collected temperature and is used as the basis for temperature overrun alarming, and the false alarm generated by the frequency converter phase-shifting transformer under the condition of large fluctuation can be avoided; and secondly, sudden faults such as short circuit, insulation failure and the like in the frequency converter phase-shifting transformer can be accurately found by acquiring and monitoring the jump temperature of the frequency converter phase-shifting transformer.
Description
Technical Field
The application relates to the technical field of power transformation and distribution, in particular to a method and a device for monitoring the temperature of a phase-shifting transformer of a frequency converter and electronic equipment.
Background
The method for continuously monitoring and analyzing the temperature of the coil winding of the transformer is an effective method for judging the running state of the transformer. The automatic alarm is carried out through the high-temperature state of the coil winding of the transformer, so that a user can find out the abnormal state or fault hidden trouble of the transformer in the running process in time. The traditional power transformer is generally in a stable working condition, the output power changes slowly, so that the temperature change of the traditional power transformer is usually gentle, and the monitoring of the running state of the power transformer can be realized by monitoring whether the highest temperature of the traditional power transformer exceeds the set threshold temperature.
For a phase-shifting transformer adopted in a large-scale frequency converter, the frequency converter is often in an unstable working condition, so that the output power of the phase-shifting transformer is adjusted very frequently, and further the temperature fluctuation of a coil winding of the transformer is large. The traditional method for monitoring the temperature of the coil winding of the power transformer cannot meet the requirement for monitoring the temperature of the phase-shifting transformer equipment of the frequency converter. For example, when the phase-shifting transformer operates under a high-load or full-load working condition, the winding temperature of the phase-shifting transformer may exceed the threshold temperature within a short time due to large output power fluctuation, but this does not indicate that the operating state of the phase-shifting transformer is necessarily abnormal; in order to avoid such false alarm, the value of the threshold temperature may be set higher, but in this case, when the phase-shifting transformer operates abnormally, the temperature rise may not reach the threshold temperature, and thus an effective alarm may not be given. For another example, when the phase-shifting transformer works at a lower load, the operating temperature is lower; in this case, if the phase-shift transformer fails, the device temperature may increase, but the device temperature may not reach the threshold temperature, and thus an effective alarm may not be issued.
Disclosure of Invention
The embodiment of the application provides a method and a device for monitoring the temperature of a phase-shifting transformer of a frequency converter and electronic equipment, which can realize accurate temperature monitoring and abnormal state alarm under the working condition that the output power of the phase-shifting transformer of the frequency converter has large fluctuation.
The embodiment of the application adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides a method for monitoring a temperature of a phase-shifting transformer of a frequency converter, which is applied to a temperature monitoring server or a host of the phase-shifting transformer of the frequency converter, where the method includes:
acquiring the acquisition temperature of a phase-shifting transformer of a frequency converter;
obtaining the moving average temperature of the frequency converter phase-shifting transformer according to the acquisition temperature of the frequency converter phase-shifting transformer;
obtaining the jump temperature of the frequency converter phase-shifting transformer according to the acquisition temperature and the moving average temperature of the frequency converter phase-shifting transformer;
determining whether the moving average temperature meets a first type of alarm condition, and triggering a first type of alarm under the condition that the first type of alarm condition is met; wherein the first type of alarm is a temperature overrun alarm;
determining whether the jump temperature meets a second type of alarm condition, and triggering a second type of alarm under the condition that the second type of alarm condition is met; wherein the second type of alarm is a temperature jump alarm.
Optionally, the acquisition temperature is a continuous time sequence of equal time intervals.
Optionally, the acquiring the collection temperature of the frequency converter phase-shifting transformer further includes: pre-processing the collection temperature, the pre-processing comprising one or more of the following methods:
removing single-point abnormal values;
supplementing the data missing value.
Optionally, the obtaining a moving average temperature of the frequency converter phase-shifting transformer according to the collected temperature of the frequency converter phase-shifting transformer includes: according to the acquisition temperature, the moving average temperature is calculated by adopting the following method:
y0＝x0，
yt＝αxt+(1-α)yt-1；
wherein x and y are respectively the acquisition temperature and the moving average temperature; x is the number of0、y0Respectively the acquisition temperature and the moving average temperature, x, at time zerotTemperature, y, acquired for time tt、yt-1The moving average temperatures at time t and time t-1 are respectively, and alpha is a weight coefficient.
Optionally, the obtaining the transition temperature of the frequency converter phase-shifting transformer according to the collected temperature and the moving average temperature of the frequency converter phase-shifting transformer includes:
and according to the acquisition temperature and the moving average temperature, calculating to obtain the jump temperature by adopting the following method:
zt＝xt-yt；
wherein z istIs the transition temperature at time t.
Optionally, the first type of alarm condition is:
the moving average temperature exceeds a first threshold temperature; or
The moving average temperature exceeds a first threshold temperature and the continuous duration of exceeding the first threshold temperature exceeds a second threshold duration.
Optionally, the second type of alarm condition is:
the jump temperature exceeds a third threshold temperature; or
The ratio of the jump temperature to the moving average temperature at the current time exceeds a fourth threshold proportion.
In a second aspect, an embodiment of the present application further provides a temperature monitoring device for a phase-shifting transformer of a frequency converter, which is applied to a temperature monitoring server or a host of the phase-shifting transformer of the frequency converter, wherein the device includes:
the first acquisition unit is used for acquiring the acquisition temperature of the frequency converter phase-shifting transformer;
the second obtaining unit is used for obtaining the moving average temperature of the frequency converter phase-shifting transformer according to the collected temperature of the frequency converter phase-shifting transformer;
the third obtaining unit is used for obtaining the jump temperature of the frequency converter phase-shifting transformer according to the collected temperature and the moving average temperature of the frequency converter phase-shifting transformer;
the first determining unit is used for determining whether the moving average temperature meets a first type of alarm condition or not, and triggering a first type of alarm under the condition that the first type of alarm condition is met; wherein the first type of alarm is a temperature overrun alarm
The second determining unit is used for determining whether the jump temperature meets a second type of alarm condition or not, and triggering a second type of alarm under the condition that the second type of alarm condition is met; wherein the second type of alarm is a temperature jump alarm.
In a third aspect, an embodiment of the present application further provides an electronic device, including:
a processor; and
a memory arranged to store computer executable instructions that, when executed, cause the processor to perform any of the methods described above.
In a fourth aspect, embodiments of the present application further provide a computer-readable storage medium storing one or more programs that, when executed by an electronic device including a plurality of application programs, cause the electronic device to perform any of the methods described above.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects: according to the temperature monitoring method, the temperature monitoring device and the electronic equipment of the frequency converter phase-shifting transformer, firstly, according to the acquired temperature of the coil winding in the frequency converter phase-shifting transformer acquired by the sensor, the moving average temperature is obtained through calculation and is used as the basis for temperature overrun alarm, the false alarm generated under the condition of large fluctuation of the frequency converter phase-shifting transformer can be avoided, and the problems of aging, poor insulation and the like of the coil winding in the frequency converter phase-shifting transformer can be effectively found; secondly, sudden faults such as short circuit, insulation failure and the like in the frequency converter phase-shifting transformer can be accurately found by acquiring and monitoring the jump temperature of the frequency converter phase-shifting transformer; thirdly, the moving average temperature and the jump temperature at the current moment are obtained by an exponential weighting moving average method, the influence of temperature data in the latest period on the current temperature can be referred, and the weight is larger when the temperature data is closer to the current time, so that the effectiveness of the moving average temperature and the jump temperature is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic flow chart of a method for monitoring a temperature of a phase-shifting transformer of a frequency converter according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a temperature monitoring device for a phase-shifting transformer of a frequency converter according to an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a temperature collection curve of a phase-shifting transformer of a frequency converter according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a moving average temperature and a transition temperature of a phase-shifting transformer of a frequency converter according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
To facilitate an understanding of the embodiments of the present application, a description of the prior art will be given. In the prior art, a large power transformer generally includes A, B, C three-phase coil windings (star connection inside the transformer) or three coil windings a-B, B-C, C-a (delta connection inside the transformer), and by arranging a temperature sensor at each coil winding position inside the transformer, the collected temperature of each coil winding inside the transformer can be accurately obtained, and the collected temperature can be regarded as the actual temperature of the coil winding. Of course, other temperature measurement methods, such as a non-contact infrared temperature measurement method, may be adopted to obtain the external temperatures of the three-phase winding coils. The method for continuously monitoring and analyzing the temperature of the coil winding of the transformer is an effective method for judging the running state of the transformer. The automatic alarm is carried out through the high-temperature state of the coil winding of the transformer, so that a user can find out the abnormal state or fault hidden trouble of the transformer in the running process in time. The traditional power transformer is generally in a stable working condition, the output power changes slowly, so that the temperature change of the traditional power transformer is usually gentle, and the monitoring of the running state of the power transformer can be realized by monitoring whether the highest temperature of the traditional power transformer exceeds the set threshold temperature.
For a phase-shifting transformer adopted in a large-scale frequency converter, the frequency converter is often in an unstable working condition, so that the output power of the phase-shifting transformer is adjusted very frequently, and further the temperature fluctuation of a coil winding of the transformer is large. If the traditional method for monitoring the temperature of the coil winding of the power transformer is adopted to measure the temperature, the requirement for monitoring the temperature of the frequency converter phase-shifting transformer equipment cannot be met. For example, when the phase-shifting transformer operates under a high-load or full-load working condition, the winding temperature of the phase-shifting transformer may exceed a set threshold temperature within a short time due to large output power fluctuation, but this does not indicate that the operating state of the phase-shifting transformer is necessarily abnormal; in order to avoid such false alarm, the value of the threshold temperature may be set higher, but in this case, when the phase-shifting transformer operates abnormally, the temperature rise may not reach the threshold temperature, and thus an effective alarm may not be given. For another example, when the phase-shifting transformer works at a lower load, the operating temperature is lower; in this case, if the phase-shift transformer fails, the device temperature may increase, but the device temperature may not reach the threshold temperature, and thus an effective alarm may not be issued.
The embodiment provides a method for monitoring a temperature of a phase-shifting transformer of a frequency converter, which is applied to a temperature monitoring server or a host of the phase-shifting transformer of the frequency converter, wherein the method, as shown in fig. 1, includes the following steps S110 to S150:
step S110: and acquiring the acquisition temperature of the frequency converter phase-shifting transformer.
In this step, the collected temperature of the frequency converter phase-shifting transformer can be directly obtained, for example, directly obtained by a temperature collecting device arranged at the front end of the frequency converter phase-shifting transformer; for example, after the frequency converter phase-shifting transformer obtains the acquisition temperature through front-end equipment, the acquisition temperature is stored in a certain database or a server, and then, for the stored acquisition temperature, the method of the embodiment is used for reading or calling the acquisition temperature data as input data to perform quasi-real-time or offline processing, thereby realizing temperature monitoring of the frequency converter phase-shifting transformer. The collected temperature can be the temperature of one or more coil windings (such as A, B, C or A-B, B-C, C-A) of the frequency converter phase-shifting transformer, and the method of the embodiment can be used for carrying out temperature monitoring and abnormal alarm respectively; or the comprehensive value (such as an arithmetic mean value) or the highest value (such as the highest value of the B-phase temperature in a star connection structure) of the three coil windings, and the method of the embodiment is used for temperature monitoring and abnormal alarm, so that the overall working state of the frequency converter phase-shifting transformer can be indicated.
Step S120: and obtaining the moving average temperature of the frequency converter phase-shifting transformer according to the acquisition temperature of the frequency converter phase-shifting transformer.
In this step, the purpose of using the moving average temperature is to smooth the large amplitude oscillation of the collected temperature caused by the large fluctuation of the output power of the frequency converter phase-shifting transformer, so as to avoid the false alarm caused by the short-time or instant peak due to the overhigh temperature at a certain moment. The calculation method of the moving average temperature can adopt various modes, for example, a sliding window moving average calculation method is adopted, and the width of a window can be a plurality of time periods for data acquisition, for example, 5 time periods; it may also be a fixed duration, for example 1 hour.
Step S130: and obtaining the jump temperature of the frequency converter phase-shifting transformer according to the acquisition temperature and the moving average temperature of the frequency converter phase-shifting transformer.
The jump temperature can prompt that the working condition of the frequency converter phase-shifting transformer has large change in a short period of time, for example, the output load of the frequency converter phase-shifting transformer increases sharply in a short period of time, or faults such as short circuit occur inside the frequency converter phase-shifting transformer. The prior transition temperature is generally obtained by the following method: the jump temperature is the current time collection temperature-the last time collection temperature. That is, the difference between two adjacent acquisition temperatures is directly used as the transition temperature. This method has the following problems: on the first hand, the collected temperature has a short-time or instant peak-valley value due to the large fluctuation of the output power of the frequency converter phase-shifting transformer, so that whether the working state of the frequency converter phase-shifting transformer is normal or not cannot be accurately indicated; in the second aspect, the collected temperature is affected by factors such as the accuracy of the temperature collecting device itself, measurement errors and the like, and the numerical value is not accurate enough. In consideration of the above two factors, the existing method of directly using the difference value of two adjacent collected temperatures as the jump temperature is not suitable for monitoring the temperature of the phase-shifting transformer of the frequency converter.
Step S140: determining whether the moving average temperature meets a first type of alarm condition, and triggering a first type of alarm under the condition that the first type of alarm condition is met; wherein the first type of alarm is a temperature overrun alarm.
Similar to the traditional power transformer, when the moving average temperature is too high, it is indicated that a high-temperature state is existed at each of the adjacent data acquisition points and is close to or exceeds the upper limit value, which usually indicates that the problems of aging, poor coil insulation performance and the like of the coil winding of the frequency converter phase-shifting transformer occur, and further can alarm and prompt a user to carry out maintenance. Generally, the phenomena are generated by slow evolution in the long-term normal use process of the frequency converter phase-shifting transformer, and can indicate that the service life of the frequency converter phase-shifting transformer is close to the end sound.
Step S150: determining whether the jump temperature meets a second type of alarm condition, and triggering a second type of alarm under the condition that the second type of alarm condition is met; wherein the second type of alarm is a temperature jump alarm.
When the jump temperature is too high, the temperature of the frequency converter phase-shifting transformer is abnormally and rapidly increased in a short time, and the sudden faults such as instantaneous breakdown short circuit of a coil winding, insulation failure and the like occur in the frequency converter phase-shifting transformer, and if the sudden faults are allowed to continue to develop, more serious consequences are likely to occur, such as abnormal shutdown of the frequency converter phase-shifting transformer due to short-circuit protection and the like. Therefore, user emergency intervention is often required.
In one embodiment of the present application, the acquisition temperature is a continuous time sequence of equal time intervals. The continuous time series refers to the temperature being collected at equal time intervals, for example every 1 minute or every 10 minutes; the temperature value may be in degrees Celsius (C.) as a temperature unit, for example.
In an embodiment of the present application, the obtaining the collected temperature of the phase-shifting transformer of the frequency converter further includes: pre-processing the collection temperature, the pre-processing comprising one or more of the following methods: removing single-point abnormal values; supplementing the data missing value.
In an actual service scene, a single-point abnormal value may occur due to interference on the temperature acquisition system, data transmission or storage errors, and the like, and the single-point abnormal value can be removed. For example, for a collected temperature value with a temperature lower than room temperature or higher than 350 ℃, the temperature value can be rejected as a single point outlier because the temperature value is unlikely to occur in an actual scene. On the other hand, the missing values after being removed and the data missing values generated by errors in the temperature acquisition system and the transmission and storage processes should be supplemented. The supplementary method can adopt various types, for example, the collected temperature value or the moving average temperature value at the last moment is directly adopted, and the method is particularly suitable for a real-time processing system; for another example, the linear difference is performed by using the collected temperature values or the moving average temperature values at the previous moment and the next moment, and the method is particularly suitable for processing quasi-real-time or off-line data after the database is dropped.
In an embodiment of the present application, the obtaining a moving average temperature of the frequency converter phase-shifting transformer according to the collected temperature of the frequency converter phase-shifting transformer includes: according to the acquisition temperature, the moving average temperature is calculated by adopting the following method: y is0＝x0，yt＝αxt+(1-α)yt-1(ii) a Wherein x and y are respectively the acquisition temperature and the moving average temperature; x is the number of0、y0Respectively the acquisition temperature and the moving average temperature, x, at time zerotTemperature, y, acquired for time tt、yt-1The moving average temperatures at time t and time t-1 are respectively, and alpha is a weight coefficient.
The method adopts an Exponential Weighted Moving Average (EWMA) method to calculate the Moving Average temperature. The weighted moving average method is adopted because the recent observation value of the observation period has larger influence on the predicted value, and the recent observation value can reflect the trend of recent change. The exponential weighted moving average method means that the weighting coefficient of each numerical value decreases exponentially with time, and the weighting coefficient of the numerical value closer to the current time is larger. The moving average calculation method relative to the sliding window has the advantages that: on one hand, the influence of the data in the latest period of time can be fully considered, and the weight of the collected temperature value is larger when the collected temperature value is closer to the current moment. Therefore, the moving average temperature obtained by the method is more representative, and the real working state of the frequency converter phase-shifting transformer can be indicated more accurately. Fig. 3 and 4 are schematic diagrams of curves of the acquisition temperature, the moving average temperature and the transition temperature of the phase-shifting transformer in an actual scene. From the figure, it can be seen that the curve of the moving average temperature is relative to the collection temperature, which can eliminate the peak in the collection temperature curve and make the curve smoother as a whole. On the other hand, by adopting the method of exponential weighted moving average, all values in the past do not need to be stored, the calculated amount is smaller, and the method is particularly suitable for monitoring a large number of frequency converter phase-shifting transformer devices in a big data scene. Typically, the weight coefficient α is in the range of 0.05 to 0.3.
In an embodiment of the present application, the obtaining the transition temperature of the frequency converter phase-shifting transformer according to the collected temperature and the moving average temperature of the frequency converter phase-shifting transformer includes: and according to the acquisition temperature and the moving average temperature, calculating to obtain the jump temperature by adopting the following method: z is a radical oft＝xt-yt(ii) a Wherein z istIs the transition temperature at time t.
Compared with the traditional method of taking the difference value between the temperature at the current moment and the temperature at the last moment as the jump temperature, the method has the advantages that the acquisition temperature and the moving average temperature are taken as the jump temperature: on one hand, the moving average temperature contains the acquired temperature information before the moment, so that the real working state of the frequency converter phase-shifting transformer can be more accurately indicated. On the other hand, the method can overcome the deviation in the acquired data caused by the error in the acquisition process of the acquired temperature. Fig. 3 and 4 are schematic diagrams of curves of the acquisition temperature, the moving average temperature and the transition temperature of the phase-shifting transformer in an actual scene. From the figure, it can be seen that although the frequency converter phase-shifting transformer operates in a large temperature range (about 10-70 ℃), the transition temperature is basically kept within ± 20 ℃ and is relatively stable.
In one embodiment of the present application, the first type of alarm condition is: the moving average temperature exceeds a first threshold temperature; or the moving average temperature exceeds a first threshold temperature and the continuous duration of exceeding the first threshold temperature exceeds a second threshold duration.
The first threshold temperature can be set according to performance parameters of the frequency converter phase-shifting transformer. For the phase-shifting transformer of the dry-type frequency converter, different threshold values can be set according to different allowable temperatures of the insulating materials in the phase-shifting transformer. For example, the allowable average temperature rise of various insulations of the dry-type transformer is referred to: the A level is 60K, the E level is 75K, the B level is 80K, the F level is 100K, the H level is 125K, and the C level is 150K. For the oil immersed frequency converter phase-shifting transformer, the setting can be carried out according to the regulation in GB 1094: the average temperature rise value of the coil winding of the oil immersed transformer is 65 ℃, the temperature rise of the top oil is 55 ℃, and the temperature rise of the iron core and the oil tank is 80 ℃. Of course, the false alarm can be reduced by further increasing by 10% -20% on the basis. As a preferred technical solution, the first type of alarm condition is that the moving average temperature exceeds a first threshold temperature, and a continuous time period exceeding the first threshold temperature exceeds a second threshold time period. The second threshold duration may be 5-10 data acquisition time intervals. The technical scheme has the advantages that when the temperature is too high, 5-10 data acquisition time intervals are further delayed for alarming so as to avoid false alarm.
In one embodiment of the present application, the second type of alarm condition is: the jump temperature exceeds a third threshold temperature; or the ratio of the jump temperature to the moving average temperature at the current moment exceeds a fourth threshold proportion.
The third threshold temperature may be a maximum jump temperature value obtained when the phase-shifting transformer of the frequency converter is directly changed from zero output to maximum power output, or a temperature value slightly higher than the maximum jump temperature value. In an actual scene, when the jump temperature is higher than the third threshold temperature, the sudden fault of the frequency converter phase-shifting transformer is prompted. As a preferred technical solution, in consideration of different influences of different environmental temperatures on heat dissipation of the frequency converter phase-shifting transformer (for example, the temperature in winter or northern area is low, the heat dissipation of the frequency converter phase-shifting transformer is fast, and thus the ramp temperature is also low), the second type of alarm condition may be set such that the ratio of the ramp temperature to the moving average temperature at the present time exceeds a fourth threshold ratio. The fourth threshold proportion may be a ratio of the maximum jump temperature value to the moving average temperature at the time at the lowest external environment temperature. In an actual scene, no matter whether the external environment temperature is high or low, when the ratio of the jump temperature to the moving average temperature at the current moment exceeds a fourth threshold ratio, the frequency converter phase-shifting transformer is prompted to have a sudden fault.
The present embodiment further provides a temperature monitoring device 200 for a phase-shifting transformer of a frequency converter, which is applied to a temperature monitoring server or a host of the phase-shifting transformer of the frequency converter, wherein as shown in fig. 2, the device 200 includes:
a first obtaining unit 210, configured to obtain a collection temperature of the frequency converter phase-shifting transformer;
a second obtaining unit 220, configured to obtain a moving average temperature of the frequency converter phase-shifting transformer according to the collected temperature of the frequency converter phase-shifting transformer;
a third obtaining unit 230, configured to obtain a jump temperature of the frequency converter phase-shifting transformer according to the collected temperature and the moving average temperature of the frequency converter phase-shifting transformer;
a first determining unit 240, configured to determine whether the moving average temperature meets a first type of alarm condition, and trigger a first type of alarm if the first type of alarm condition is met; wherein the first type of alarm is a temperature overrun alarm
A second determining unit 250, configured to determine whether the jump temperature meets a second type of alarm condition, and trigger a second type of alarm if the second type of alarm condition is met; wherein the second type of alarm is a temperature jump alarm.
In one embodiment of the present application, the acquisition temperature is a continuous time sequence of equal time intervals.
In an embodiment of the present application, the first obtaining unit 210 is further configured to: single point outliers are rejected, and/or missing values of supplemental data.
In an embodiment of the present application, the second obtaining unit 220 is specifically configured to: according toThe temperature is acquired by calculating the moving average temperature by adopting the following method: y is0＝x0，yt＝αxt+(1-α)yt-1(ii) a Wherein x and y are respectively the acquisition temperature and the moving average temperature; x is the number of0、y0Respectively the acquisition temperature and the moving average temperature, x, at time zerotTemperature, y, acquired for time tt、yt-1The moving average temperatures at time t and time t-1 are respectively, and alpha is a weight coefficient.
In an embodiment of the present application, the third obtaining unit 230 is specifically configured to: and according to the acquisition temperature and the moving average temperature, calculating to obtain the jump temperature by adopting the following method: z is a radical oft＝xt-yt(ii) a Wherein z istIs the transition temperature at time t.
In one embodiment of the present application, the first type of alarm condition is: the moving average temperature exceeds a first threshold temperature; or the moving average temperature exceeds the first threshold temperature, and the continuous time length of exceeding the first threshold temperature exceeds the second threshold time length.
In one embodiment of the present application, the second type of alarm condition is: the jump temperature exceeds a third threshold temperature; or the ratio of the jump temperature to the moving average temperature at the current moment exceeds a fourth threshold proportion.
It can be understood that the above frequency converter phase-shifting transformer temperature monitoring apparatus 200 can implement the steps of the frequency converter phase-shifting transformer temperature monitoring method applied to the frequency converter phase-shifting transformer temperature monitoring server or the host provided in the foregoing embodiment, and the relevant explanation about the frequency converter phase-shifting transformer temperature monitoring method is applicable to the frequency converter phase-shifting transformer temperature monitoring apparatus 200, and is not repeated herein.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 5, at the hardware level, the electronic device includes a processor, and optionally further includes an internal bus, a network interface, and a memory. The Memory may include a Memory, such as a Random-Access Memory (RAM), and may further include a non-volatile Memory, such as at least 1 disk Memory. Of course, the electronic device may also include hardware required for other services.
The processor, the network interface, and the memory may be connected to each other via an internal bus, which may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 5, but this does not indicate only one bus or one type of bus.
And the memory is used for storing programs. In particular, the program may include program code comprising computer operating instructions. The memory may include both memory and non-volatile storage and provides instructions and data to the processor.
The processor reads the corresponding computer program from the nonvolatile memory to the memory and then runs the computer program to form the processing device of the account quota data on the logic level. The processor is used for executing the program stored in the memory and is specifically used for executing the following operations:
acquiring the acquisition temperature of a phase-shifting transformer of a frequency converter;
obtaining the moving average temperature of the frequency converter phase-shifting transformer according to the acquisition temperature of the frequency converter phase-shifting transformer;
obtaining the jump temperature of the frequency converter phase-shifting transformer according to the acquisition temperature and the moving average temperature of the frequency converter phase-shifting transformer;
determining whether the moving average temperature meets a first type of alarm condition, and triggering a first type of alarm under the condition that the first type of alarm condition is met; wherein the first type of alarm is a temperature overrun alarm;
determining whether the jump temperature meets a second type of alarm condition, and triggering a second type of alarm under the condition that the second type of alarm condition is met; wherein the second type of alarm is a temperature jump alarm.
The method for monitoring the temperature of the frequency converter phase-shifting transformer described in the above embodiments may be applied to a processor, or implemented by the processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
The electronic device may further execute the method executed by the temperature monitoring device for the phase-shifting transformer of the frequency converter in fig. 2, and implement the functions of the temperature monitoring device for the phase-shifting transformer of the frequency converter in the embodiment shown in fig. 2, which are not described herein again.
An embodiment of the present application further provides a computer-readable storage medium storing one or more programs, where the one or more programs include instructions, which when executed by an electronic device including a plurality of application programs, enable the electronic device to perform the method for monitoring the temperature of the frequency converter phase shifting transformer recited in the foregoing embodiment, and are specifically configured to perform:
acquiring the acquisition temperature of a phase-shifting transformer of a frequency converter;
obtaining the moving average temperature of the frequency converter phase-shifting transformer according to the acquisition temperature of the frequency converter phase-shifting transformer;
obtaining the jump temperature of the frequency converter phase-shifting transformer according to the acquisition temperature and the moving average temperature of the frequency converter phase-shifting transformer;
determining whether the moving average temperature meets a first type of alarm condition, and triggering a first type of alarm under the condition that the first type of alarm condition is met; wherein the first type of alarm is a temperature overrun alarm;
determining whether the jump temperature meets a second type of alarm condition, and triggering a second type of alarm under the condition that the second type of alarm condition is met; wherein the second type of alarm is a temperature jump alarm.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A temperature monitoring method for a frequency converter phase-shifting transformer is applied to a temperature monitoring server or a host of the frequency converter phase-shifting transformer, wherein the method comprises the following steps:
acquiring the acquisition temperature of a phase-shifting transformer of a frequency converter;
obtaining the moving average temperature of the frequency converter phase-shifting transformer according to the acquisition temperature of the frequency converter phase-shifting transformer;
obtaining the jump temperature of the frequency converter phase-shifting transformer according to the acquisition temperature and the moving average temperature of the frequency converter phase-shifting transformer;
determining whether the moving average temperature meets a first type of alarm condition, and triggering a first type of alarm under the condition that the first type of alarm condition is met; wherein the first type of alarm is a temperature overrun alarm;
determining whether the jump temperature meets a second type of alarm condition, and triggering a second type of alarm under the condition that the second type of alarm condition is met; wherein the second type of alarm is a temperature jump alarm.
2. The method of claim 1, wherein the acquisition temperature is a continuous time series of equal time intervals.
3. The method of claim 1, wherein said obtaining the acquisition temperature of the frequency converter phase shifting transformer further comprises: pre-processing the collection temperature, the pre-processing comprising one or more of the following methods:
removing single-point abnormal values;
supplementing the data missing value.
4. The method of claim 1, wherein the obtaining a moving average temperature of the frequency converter phase shifting transformer according to the collected temperature of the frequency converter phase shifting transformer comprises:
according to the acquisition temperature, the moving average temperature is calculated by adopting the following method:
y0＝x0，
yt＝αxt+(1-α)yt-1；
wherein x and y are respectively the acquisition temperature and the moving average temperature; x is the number of0、y0Respectively the acquisition temperature and the moving average temperature, x, at time zerotTemperature, y, acquired for time tt、yt-1The moving average temperatures at time t and time t-1 are respectively, and alpha is a weight coefficient.
5. The method of claim 4, wherein the obtaining the transition temperature of the frequency converter phase shifting transformer from the collected temperature and the moving average temperature of the frequency converter phase shifting transformer comprises:
and according to the acquisition temperature and the moving average temperature, calculating to obtain the jump temperature by adopting the following method:
zt＝xt-yt；
wherein z istIs the transition temperature at time t.
6. The method of claim 1, wherein the first type of alarm condition is:
the moving average temperature exceeds a first threshold temperature; or
The moving average temperature exceeds a first threshold temperature and the continuous duration of exceeding the first threshold temperature exceeds a second threshold duration.
7. The method of claim 1, wherein the second type of alarm condition is:
the jump temperature exceeds a third threshold temperature; or
The ratio of the jump temperature to the moving average temperature at the current time exceeds a fourth threshold proportion.
8. The utility model provides a converter phase-shifting transformer temperature monitoring device, is applied to converter phase-shifting transformer temperature monitoring server or host computer, wherein, the device includes:
the first acquisition unit is used for acquiring the acquisition temperature of the frequency converter phase-shifting transformer;
the second obtaining unit is used for obtaining the moving average temperature of the frequency converter phase-shifting transformer according to the collected temperature of the frequency converter phase-shifting transformer;
the third obtaining unit is used for obtaining the jump temperature of the frequency converter phase-shifting transformer according to the collected temperature and the moving average temperature of the frequency converter phase-shifting transformer;
the first determining unit is used for determining whether the moving average temperature meets a first type of alarm condition or not, and triggering a first type of alarm under the condition that the first type of alarm condition is met; wherein the first type of alarm is a temperature overrun alarm
The second determining unit is used for determining whether the jump temperature meets a second type of alarm condition or not, and triggering a second type of alarm under the condition that the second type of alarm condition is met; wherein the second type of alarm is a temperature jump alarm.
9. An electronic device, comprising:
a processor; and
a memory arranged to store computer executable instructions which, when executed, cause the processor to perform the method of any of claims 1 to 7.
10. A computer readable storage medium storing one or more programs which, when executed by an electronic device comprising a plurality of application programs, cause the electronic device to perform the method of any of claims 1-7.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116593811A (en) * | 2023-07-17 | 2023-08-15 | 南京欧陆电气股份有限公司 | Integrated frequency converter running state monitoring system and monitoring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116593811A (en) * | 2023-07-17 | 2023-08-15 | 南京欧陆电气股份有限公司 | Integrated frequency converter running state monitoring system and monitoring method |
| CN116593811B (en) * | 2023-07-17 | 2023-09-15 | 南京欧陆电气股份有限公司 | Integrated frequency converter running state monitoring system and monitoring method |
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