CN118783640A - A substation monitoring system and method based on LabVIEW - Google Patents
A substation monitoring system and method based on LabVIEW Download PDFInfo
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Abstract
本发明提供一种基于LabVIEW的变电站监控系统及方法，系统包括数据采集模块、数据处理模块、报警及事件处理模块、可视化及用户交互模块、数据存储导出模块；数据采集模块用于获取监测数据；数据处理模块用于对监测数据进行滤波，进行数据得到处理后的监测数据；报警及事件处理模块将处理后的监测数据与报警阈值进行比较，进行预警；并对报警事件数据进行整理；可视化及用户交互模块用于进行图形显示，且实现人机交互；数据存储导出模块用于将监测数据进行储存或导出。本发明在较大程度上提升了数据分析的效率和直观性，通过预警和可视化数据展示以及人机交互，为操作人员提供可靠的数据基础，提升变电站整体运行的稳定性和可靠性。
The present invention provides a substation monitoring system and method based on LabVIEW, the system includes a data acquisition module, a data processing module, an alarm and event processing module, a visualization and user interaction module, and a data storage export module; the data acquisition module is used to obtain monitoring data; the data processing module is used to filter the monitoring data, and the data is processed to obtain the monitoring data; the alarm and event processing module compares the processed monitoring data with the alarm threshold, and issues an early warning; and sorts the alarm event data; the visualization and user interaction module is used to perform graphic display and realize human-computer interaction; the data storage export module is used to store or export the monitoring data. The present invention improves the efficiency and intuitiveness of data analysis to a large extent, provides a reliable data basis for operators through early warning and visualization data display and human-computer interaction, and improves the stability and reliability of the overall operation of the substation.
Description
Technical Field
The invention belongs to the technical field of substation monitoring and early warning, and particularly relates to a substation monitoring system and method based on LabVIEW.
Background
In a transformer substation, more sensors and monitoring devices are required for data monitoring, and the sensors and monitoring devices in the transformer substation need to work under the influence of various different environmental factors for a long time, so that the performance of the sensors and monitoring devices can be influenced by some environmental factors, and the sensitivity or the accuracy of data monitoring are reduced. Based on the above, the operation parameters of the transformer substation need to be monitored to ensure the operation reliability of the transformer substation.
However, in the present day, for some monitoring systems of the transformer substation, the existing monitoring systems of the transformer substation generally adopt a method of measuring each parameter respectively, and data of each physical field is collected in an isolated manner, so that an effective data integration and comprehensive analysis platform is not formed, and an operator is difficult to obtain comprehensive and comprehensive environmental impact result data due to the isolated data collection mode, so that the overall operation condition of the transformer substation cannot be estimated accurately. Because the data is isolated, the existing monitoring system often lacks intelligent analysis and prediction functions, and potential faults of the transformer substation cannot be predicted according to historical data and real-time data. This makes the fault prevention and counterwork of the substation relatively passive, and it is difficult to find and solve the problem in time. Because the sensor and the monitoring device are affected by various environmental factors, such as temperature, humidity, electromagnetic interference, etc., during long-term operation, the performance may be degraded, resulting in degradation of accuracy of data monitoring. Existing monitoring systems often lack consideration of these environmental factors, and do not provide for targeted environmental adaptive design and optimization of sensors and monitoring devices. The existing monitoring system often lacks good expandability, and is difficult to conveniently add new monitoring parameters and equipment, and the future development requirement of the transformer substation cannot be met. The existing monitoring system may have the problems of unreasonable design of a user interface, complex operation and the like, and is relatively difficult to quickly and accurately acquire the required information. Therefore, in summary, in the existing monitoring system of the transformer substation, the integration degree in the data collection and processing process is not high enough, and the real-time situation of the transformer substation equipment cannot be effectively and accurately detected and judged, so that the fault prevention and coping work cannot be timely performed, and the overall operation stability of the transformer substation is affected.
Disclosure of Invention
The invention aims to provide a LabVIEW-based substation monitoring system and a LabVIEW-based substation monitoring method, which are used for solving the problems that the integration degree of the existing substation monitoring system in the data collection and processing process is not high enough, and the real-time condition of substation equipment cannot be effectively and accurately detected and judged, so that fault prevention and coping work cannot be timely carried out, and the integral operation stability of a substation is affected.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The invention provides a substation monitoring system based on LabVIEW, which comprises a data acquisition module, a data processing module, an alarm and event processing module, a visualization and user interaction module and a data storage export module; wherein:
the data acquisition module is used for acquiring monitoring data in the sensor and the monitoring equipment in real time and transmitting the monitoring data to the data processing module;
the data processing module is used for filtering the monitoring data by adopting a Butterworth low-pass filter, and then carrying out data statistics and analysis to obtain the processed monitoring data;
The alarm and event processing module compares the processed monitoring data with an alarm threshold value by setting the alarm threshold value, and selects alarm or non-alarm according to whether the monitoring data exceeds the alarm threshold value; and data arrangement is carried out on the alarm event data;
The visualization and user interaction module is used for processing the processed monitoring data into graphics for display and realizing man-machine interaction;
the data storage export module is used for storing or exporting the processed monitoring data.
In some embodiments, monitoring the data includes: voltage, current, electric field strength, magnetic field strength, vibration amplitude and frequency, temperature, and humidity.
In some embodiments, the data acquisition module has a multi-channel acquisition card with multiple analog input channels, each for independently acquiring signals of one sensor, to achieve synchronous acquisition of multiple channel monitoring data.
Further, the acquisition speed of the multichannel acquisition card is 2MS/s, and the multichannel acquisition card comprises a limited acquisition mode, a continuous sampling mode and a timing single-point mode.
In some embodiments, the butterworth low pass filter: a low-pass filter is adopted to filter out high-frequency components, a high-pass filter is adopted to filter out details and edges in the low-frequency component enhanced image, and a band-pass filter allows signals in a frequency range to pass through and simultaneously attenuates or suppresses signals lower than and higher than the frequency range; the order of the selection filter determines the sampling frequency, the high cut-off frequency and the low cut-off frequency.
In some embodiments, in the alarm and event processing module, the alarm threshold includes a preset voltage, a magnetic field strength threshold, a vibration amplitude threshold, a frequency threshold, an upper temperature threshold, a lower temperature threshold, an upper humidity threshold, and a lower humidity threshold; wherein:
The preset voltages include a first voltage threshold U 1, a second voltage threshold U 2, and a third voltage threshold U 3, and U 1<U2<U3.
Further, in the alarm and event processing module, the real-time voltage U 0 is compared with a preset voltage:
When U 1≤U0<U2, triggering an alarm of a warning level; when U 2≤U0<U3, triggering an alarm of the severity level; when U 3≤U0, an alarm for emergency power outage handling is triggered.
Further, in the alarm and event processing module, the real-time magnetic field intensity, the real-time vibration amplitude, the real-time frequency, the real-time temperature and the real-time humidity are respectively compared with the corresponding magnetic field intensity threshold value, the vibration amplitude threshold value, the frequency threshold value, the temperature upper threshold value, the temperature lower threshold value, the humidity upper threshold value and the humidity lower threshold value, and the corresponding alarm is triggered.
In some implementations, the alarm event data includes abnormal event information including event type, event value, event occurrence time; the alarm and event processing module generates a report according to the abnormal event information, wherein the report comprises event type, event occurrence time, event description and processing measures.
The invention also provides a substation monitoring method based on LabVIEW, which comprises the following steps:
S1, a data acquisition module acquires monitoring data in a sensor and monitoring equipment in real time, and transmits the monitoring data to a data processing module;
S2, filtering the monitoring data by using a Butterworth low-pass filter by using a data processing module, and then carrying out data statistics and analysis to obtain the processed monitoring data; the data storage export module stores or exports the processed monitoring data;
s3, the alarm and event processing module compares the processed monitoring data with an alarm threshold value by setting the alarm threshold value, and selects alarm or non-alarm according to whether the monitoring data exceeds the alarm threshold value; and data arrangement is carried out on the alarm event data;
s4, the visualization and user interaction module processes the processed monitoring data into graphics to display, and man-machine interaction is realized;
The LabVIEW-based substation monitoring method is performed by the LabVIEW-based substation monitoring system.
Compared with the prior art, the LabVIEW-based substation monitoring system and method have the following beneficial technical effects.
The invention provides a substation monitoring system based on LabVIEW, which comprises a data acquisition module, a data processing module, an alarm and event processing module, a visualization and user interaction module and a data storage export module; wherein: the data acquisition module is used for acquiring monitoring data in the sensor and the monitoring equipment in real time and transmitting the monitoring data to the data processing module; the data processing module is used for filtering the monitoring data by adopting a Butterworth low-pass filter, and then carrying out data statistics and analysis to obtain the processed monitoring data; the alarm and event processing module compares the processed monitoring data with an alarm threshold value by setting the alarm threshold value, and selects alarm or non-alarm according to whether the monitoring data exceeds the alarm threshold value; and data arrangement is carried out on the alarm event data; the visualization and user interaction module is used for processing the processed monitoring data into graphics for display and realizing man-machine interaction; the data storage export module is used for storing or exporting the processed monitoring data. Based on the above, the invention performs real-time acquisition on environmental data and operation data in the transformer substation based on the LabVIEW platform, performs optimization and integration processing on the acquired monitoring data, performs corresponding alarm according to comparison between a set threshold and a judgment rule and the acquired data, provides data support for operators, and displays the data through a dynamic and interactive visual interface, thereby improving the efficiency and intuitiveness of data analysis to a greater extent.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic diagram of a LabVIEW-based substation monitoring system and method according to the present invention;
Fig. 2 is a schematic flow chart of a substation monitoring system and method based on LabVIEW, which collect multiple physical field input signals and transmit the signals to LabVIEW when the system is applied to multiple physical field test.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
How to effectively and accurately acquire parameters of the transformer substation, and how to process and optimize the parameters so as to accurately judge the real-time condition of transformer substation equipment, thereby improving the overall monitoring quality of the transformer substation.
As shown in fig. 1, the invention provides a substation monitoring system based on LabVIEW, which comprises a data acquisition module, a data processing module, an alarm and event processing module, a visualization and user interaction module and a data storage export module; wherein:
the data acquisition module is used for acquiring monitoring data in the sensor and the monitoring equipment in real time and transmitting the monitoring data to the data processing module;
the data processing module is used for filtering the monitoring data by adopting a Butterworth low-pass filter, and then carrying out data statistics and analysis to obtain the processed monitoring data;
The alarm and event processing module compares the processed monitoring data with an alarm threshold value by setting the alarm threshold value, and selects alarm or non-alarm according to whether the monitoring data exceeds the alarm threshold value; and data arrangement is carried out on the alarm event data;
The visualization and user interaction module is used for processing the processed monitoring data into graphics for display and realizing man-machine interaction;
the data storage export module is used for storing or exporting the processed monitoring data.
The system can monitor and rapidly respond to each item of data in the transformer substation in real time, further improve the running stability of the transformer substation, rapidly respond to environmental changes and equipment anomalies, and reduce the downtime and maintenance cost. The method and the device help to optimize the precision of the transformer substation sensor or monitoring equipment by improving the precision of monitoring and prediction, thereby reducing the running cost of maintenance. The system can pre-warn in advance based on the setting and judging rules of various thresholds, so that operators can adjust substation equipment or other sensors, the substation can run relatively stably, the risk of substation accidents can be reduced, and protection is provided for the substation.
The LabVIEW-based substation monitoring system is further described in detail below with reference to the accompanying drawings and detailed description.
In some embodiments, the invention monitors the operation parameters, the environmental parameters and the like of the transformer substation in real time, and further performs visual display or early warning on the result data through system judgment, so as to provide data support for operators, thereby facilitating the subsequent adjustment and maintenance of the operators.
Specifically, in the LabVIEW-based substation monitoring system, the main function of the data acquisition module is to acquire various physical field data from various sensors and monitoring equipment in real time and transmit the data to a subsequent data processing module. The acquired data comprise parameters such as voltage, current, electric field intensity, magnetic field intensity, vibration amplitude and frequency, temperature, humidity and the like.
Because the sensor generally outputs continuous analog voltage or current signals representing changes in physical quantities, the sensor output signals and input device output signals are connected to the analog inputs of a multi-channel acquisition card that supports multiple analog input channels, typically from 8 to tens of different channels, each of which can independently acquire signals from one sensor. The synchronous acquisition of a plurality of channels can be realized through the multichannel acquisition card, and the time consistency of different sensor data is ensured. The high sampling rate is supported, and the acquisition requirement of high-speed change signals is met.
The multichannel acquisition card comprises 16 analog signal interfaces, and can realize the synchronous real-time acquisition of data of 16 channels. The multichannel acquisition card can realize the highest 2MS/s, can set up sampling clock and specifically define sampling rate and sampling mode, including limited acquisition mode, continuous sampling mode and timing single-point mode etc., specific sampling rate and sampling mode can be specifically modified according to specific experimental requirement. The multichannel acquisition card is connected with a computer, so that the transmission of acquired data is realized.
In order to remove clutter components in a received signal, the data processing module of the invention can select a filter module in LabVIEW to realize filtering, and can set the types of the filters, such as a high-pass filter, a low-pass filter, a band-pass filter and the like, further improve the filtering effect by selecting the order of the filters, and simultaneously determine the sampling frequency f s, the high-cutoff frequency f h and the low-cutoff frequency f l.
The statistical toolkit (STATISTICS TOOLKIT) in LabVIEW provides various statistical analysis functions such as mean, median, standard deviation, etc.
In the LabVIEW-based substation monitoring system, the main functions of the data storage and export module comprise:
and (3) data storage: and storing the processed data into a database or a file to ensure the safety and usability of the data.
And (3) data management: and the functions of inquiring, updating and deleting the data are provided, so that the user can manage the stored data conveniently.
And (3) data export: export of data into multiple formats, such as CSV, excel, PDF, etc., is supported to meet different analysis and reporting requirements.
The real-time is used as a line named for the file, the line and the acquired and processed data are connected to a 'write-in electronic form with separator', and meanwhile, a storage position can be set, so that the csv format of the data can be stored and exported.
In the invention, after the alarm and event processing module receives the data processed by the data processing module, the change condition of the monitored data processed in real time ensures that the data is in a normal range. The data can be read and monitored periodically using a periodic structure and timer in LabVIEW.
The alarm threshold value is set according to the actual requirement, and different threshold values can be set for different monitoring parameters. And when the monitoring data exceeds a preset threshold value, sending alarm information in time. An audible alarm function of LabVIEW may be used to sound a beep of the system set duration and frequency when an alarm signal is transmitted to the beep module.
Based on the above, specifically, the present invention sets the preset voltages including the preset first preset voltage U 1, the second preset voltage U 2, and the third preset voltage U 3, the voltage thresholds U 1、U2 and U 3 can be set according to the rated voltage and the allowable fluctuation range of the device, and U 1<U2<U3; Presetting a first preset electric field intensity E 1, a second preset electric field intensity E 2 and a third preset electric field intensity E 3, and E 1<E2<E3; And then determining response measures according to the magnitude relation between the real-time voltage U 0 and each preset voltage. When U 1≤U0<U2, triggering an alarm of a warning level; when U 2≤U0<U3, triggering an alarm of the severity level; when U 3≤U0, emergency power failure processing is triggered. Similar hierarchical response mechanisms are used for monitoring the electric field intensity by the same system, and the thresholds E 1、E2 and E 3 of the electric field intensity can be set based on the insulation intensity of the electric device and the environmental safety standard, when the real-time electric field intensity E 1≤E0<E2, triggering an alarm at a warning level; When E 2≤E0<E3, triggering an alarm of the severity level; when E 3≤E0, emergency power failure handling is triggered.
Specifically, the invention sets the magnetic field intensity threshold H max, compares the real-time magnetic field intensity H 0 with the magnetic field intensity threshold H max, when the magnetic field intensity is H 0＞Hmax, the magnetic field generating equipment can be firstly adjusted to be small or closed, if the residual magnetic field or the abnormal amplitude still exists, the field inspection of technicians is required, after the fact that no electrical danger exists is determined, the magnetic field intensity can be measured in detail by using the magnetic field measuring instrument, and the abnormal magnetic field sources of other equipment are positioned and maintained. If no abnormal magnetic field exists, the upper computer can turn on the magnetic field generating device again, if H 0＞Hmax still appears, the magnetic field generating device can be judged to be in fault, and the magnetic field generating device is disconnected and maintained. If the abnormal magnetic field is determined to be absent after the detailed examination and processing, the technician can restart the magnetic field generating device through the upper computer.
When the vibration amplitude or the frequency is abnormal, the monitoring frequency is adjusted or maintenance teams are dispatched through the upper computer. Specifically, the method includes presetting a vibration amplitude threshold A max and a frequency threshold F max, comparing a real-time vibration amplitude A 0 with the vibration amplitude threshold A max, comparing a real-time frequency F 0 with the frequency threshold F max, and judging whether to adjust a monitoring frequency or dispatch a maintenance team according to the comparison result. When a 0≤Amax and F 0≤Fmax, the system determines that the current vibration is within a safe range, no adjustments need to be made or maintenance teams need to be dispatched. When a 0＞Amax or F 0＞Fmax is used, the system can first attempt to reduce the amplitude or frequency of the electromagnetic vibration exciter in real time through the upper computer so as to rapidly cope with the abnormal situation. At this time, the upper computer sends an adjustment command to control the electromagnetic vibration exciter to reduce the vibration amplitude or frequency, and continuously monitors the adjusted effect. If after adjustment the vibration amplitude and frequency returns to normal range for a period of time and remains stable, the system will consider the problem to have been solved and the device can continue to operate normally. But if the amplitude or frequency of the vibration is still unstable and continues to increase after adjustment, the system will take more stringent measures. At this time, the upper computer sends an instruction to turn off the electromagnetic vibration exciter so as to prevent the equipment from being damaged by continuous abnormal vibration. At the same time, the system will immediately dispatch technicians to the field for detailed service.
The invention collects real-time temperature and humidity data of equipment in a transformer substation, and judges whether cooling or heating measures of the equipment need to be adjusted according to the temperature and humidity data. The method specifically comprises the steps of presetting a temperature upper and lower threshold T max、Tmin and a humidity threshold H max、Hmin, comparing a real-time temperature T 0 with the temperature threshold T max、Tmin, comparing a real-time humidity H 0 with the humidity threshold H max、Hmin, and judging whether to adjust cooling or heating measures of equipment according to a comparison result. When T 0＞Tmax or H 0＞Hmax is adopted, judging that cooling or dehumidifying measures of the equipment need to be adjusted, such as starting a fan or a cooling liquid circulation system to realize internal temperature cooling, starting a dehumidifier, and increasing air circulation to reduce the ambient humidity; when T 0<Tmin and H 0<Hmin, it is determined that a heating or humidifying measure of the apparatus, such as increasing the heater power to achieve a rise in the internal temperature, or the like, is required to be adjusted, and the power of the steam humidifier is increased to increase the ambient humidity. The temperature and humidity are restored to be between the set upper and lower thresholds by adjusting the device.
The alarm and event processing module of the monitoring system records the detailed information of each abnormal event in real time, including event type, event value, occurrence time and the like. The storage may be performed using a file or database. And generating a detailed report according to the recorded abnormal event, wherein the report content comprises event type, occurrence time, event description, processing measures and the like.
The data visualization and interaction module in the monitoring system can use the waveform diagram in the LabVIEW self-contained graph to realize the visualization of the acquired data on the LabVIEW front panel, and the abscissa is real-time and the ordinate is the amplitude of the acquired data. LabVIEW provides a visual and interactive platform, and can control a switch for measuring and collecting, adjust sampling frequency, set data storage position and the like through control setting, and simultaneously can display the waveform of measurement and the reason for alarm generation. The function of the data visualization and user interaction module can be realized, so that a user can intuitively understand and analyze the data in the multi-physical-field simulation experiment of the transformer substation, and more details and control can be obtained through interaction operation.
As shown in FIG. 2, as an embodiment, the LabVIEW-based substation monitoring system can be applied to a plurality of multi-physical simulation field test of a sensor or other equipment of a substation, and the monitoring system is applied to the multi-physical simulation field of the sensor or other equipment of the substation, and similar to the above, based on the monitoring of various data in the multi-physical simulation field, the monitoring system can provide data support for operators through data processing, early warning, visual display and the like, so that the operators can conveniently adjust the scene equipment of the multi-physical simulation field correspondingly, the accuracy of the multi-physical simulation field test is improved, the reliability of the sensor or other equipment of the substation is improved, and the overall stability of the substation is improved after the sensor or other equipment of the substation is in service.
Finally, it should be noted that: the above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way; those skilled in the art will readily appreciate that the present invention is well adapted to carry out the ends of the same out as described herein; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present invention are possible in light of the above teachings without departing from the scope of the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the present invention.
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| CN119787650B (en) * | 2025-03-07 | 2025-07-08 | 四川水利职业技术学院 | A monitoring method for power station operation status |
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