Capacitance data analysis device

Abstract

According to the capacitance data analysis equipment provided by the invention, the acquisition unit, the storage unit, the control unit and the power supply unit are integrated in the equipment, so that the capacitance data analysis equipment can realize acquisition of capacitance real-time state information, data storage and analysis by utilizing a local capacitance analysis algorithm; in addition, due to integration of all the units, the processes of installation, configuration and debugging of all the units are reduced, the deployment process is simplified, the deployment cost is reduced, when power is supplied to all the units, a unified power supply unit is adopted instead of power supply of all the units, and the power supply efficiency is improved. The power distribution difficulty is reduced, the power supply circuit is simplified, and the production cost is saved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a capacitance data analysis device. Background Art

[0002] With the gradual development of electronic technology, capacitors are widely used in electronic and electrical circuits in data centers, low-voltage power distribution systems and other application scenarios due to their functions of filtering, power factor compensation, energy storage, DC isolation, and providing high-precision stable output AC power.

[0003] When a capacitor fails, it will not only affect the operation of the circuit it is used in, but also cause accidents such as explosion and fire. Therefore, it is necessary to monitor the status of the capacitor.

[0004] In the prior art, a capacitance data analysis system is generally used to monitor, analyze and predict the state of capacitance devices in the target area. In the capacitance data analysis system, the collector wirelessly transmits the obtained sampled data to the server, so that the server calls the corresponding capacitance analysis API (Application Programming Interface) to process the capacitance data, and wirelessly transmits the analysis results to the target display device for display. The multiple distributed devices included in the capacitance data analysis system require a large installation space (especially the server), and the corresponding deployment requirements are also complex, requiring the installation, configuration, separate and joint debugging of multiple devices, and the corresponding production and maintenance costs are also high.

[0005] Therefore, building a capacitance data analysis device with simple deployment and low production and maintenance costs has become a research focus. Summary of the invention

[0006] The present application provides a capacitance data analysis device to solve the above technical problems.

[0007] The present application provides a capacitance data analysis device, comprising:

[0008] A collection unit, used to obtain real-time status information of at least one capacitor and transmit the real-time status information to a control unit;

[0009] A storage unit, used to store historical status information and historical alarm information of each of the capacitors;

[0010] The control unit is electrically connected to the acquisition unit and the storage unit, and is used to obtain the historical status information and the historical alarm information of each capacitor from the storage unit, and use the capacitor analysis algorithm stored locally to process the real-time status information, the historical status information, and the historical alarm information, and output the status analysis result of the capacitor; the status analysis result includes the health status of the capacitor;

[0011] A power supply unit is electrically connected to the collection unit, the storage unit and the control unit respectively, and is used to provide corresponding power supply to the collection unit, the storage unit and the control unit.

[0012] In the above technical solution, the capacitance data analysis device integrates the acquisition unit, storage unit, control unit and power supply unit, so that the capacitance data analysis device can realize the collection of capacitance real-time status information, data storage and analysis using the local capacitance analysis algorithm without calling the external API interface for processing, thereby reducing the demand for network stability. In addition, due to the integration of each unit, the process of installing, configuring and debugging each unit separately is reduced, the deployment process is simplified, and the deployment cost is reduced. When powering each unit, a unified power supply unit is used instead of powering each unit separately, thereby reducing the difficulty of power distribution, simplifying the power supply circuit and saving production costs.

[0013] Optionally, the power supply unit includes a lightning protection circuit, a conversion circuit and an output filtering circuit;

[0014] The lightning protection circuit is used to receive the mains power and discharge the lightning current impulse energy and operation surge impulse energy contained in the mains power;

[0015] The conversion circuit is electrically connected to the lightning protection circuit, and is used to convert the mains power into a DC signal required by each non-power unit; the non-power unit includes the acquisition unit, the storage unit or the control unit;

[0016] The output filter circuit is electrically connected to the conversion circuit, and is used to filter out the ripple voltage in the DC signal, and transmit the filtered DC signal to each of the non-power supply units.

[0017] Optionally, the conversion circuit includes a mains conversion circuit and a plurality of secondary conversion circuits, and the number of the output filter circuits is the same as the number of the secondary conversion circuits;

[0018] The mains power conversion circuit is electrically connected to the lightning protection circuit, and is used to obtain the mains power and rectify the mains power into a first direct current signal;

[0019] Each of the secondary conversion circuits is electrically connected to the mains conversion circuit, and is used to convert the first DC signal into a second DC signal, wherein the voltage value of the first DC signal is different from the voltage value of the second DC signal, and the voltage value of the second DC signal is the same as the DC signal required by the non-power supply unit electrically connected to the secondary conversion circuit;

[0020] Each of the output filter circuits is electrically connected to a corresponding secondary conversion circuit and a corresponding non-power supply unit.

[0021] In the above technical scheme, by setting the lightning protection circuit and the AC power change circuit, unified protection and voltage reduction operation of the power supply unit are realized, and corresponding regulation is performed using multiple secondary conversion circuits according to the power supply voltage required by each unit. This not only meets the power supply of the entire capacitance data analysis equipment, but also simplifies the circuit structure for powering each device during the capacitance data analysis process, simplifies the installation, debugging, and maintenance process, and reduces costs.

[0022] Optionally, the input end of the acquisition unit is electrically connected to the first end of the network cable, and the second end of the network cable is electrically connected to the sensor;

[0023] The sensor is used to collect real-time status information of the capacitor; the real-time status information also includes the voltage value, current value and ripple voltage value of the capacitor;

[0024] The sensor is arranged on the surface of the capacitor to be measured or in the space where the capacitor to be measured is located.

[0025] In the above technical solution, the acquisition unit is connected to the sensor arranged around the measured capacitor through a network cable to ensure the stability of information transmission between the sensor and the capacitance data analysis equipment, and prevent data loss or data transmission delay due to poor network signal.

[0026] Optionally, the state information includes temperature information, environmental information, voltage value, current value, and ripple voltage value; the capacitance analysis algorithm includes a health analysis model;

[0027] The control unit processes the real-time status information, the historical status information, and the historical alarm information using a capacitance analysis algorithm stored locally, and outputs a status analysis result of the capacitance, including:

[0028] The control unit compares the real-time status information with the historical status information corresponding to the historical alarm information by using the health analysis model, and determines that the capacitor is in a fault state when each state in the real-time status information is within a preset fluctuation range of the state corresponding to the target historical status information, and generates historical alarm information corresponding to the target historical status information;

[0029] The historical alarm information includes temperature information, voltage value, current value and ripple voltage value sampled by the capacitor at at least one historical moment, and alarm information that determines that the capacitor is in a fault state based on the sampled state information at the historical moment.

[0030] Optionally, the control unit processes the real-time status information, the historical status information and the historical alarm information using the health analysis model to determine the health status of the capacitor, including:

[0031] The control unit processes the historical status information using the health analysis model to respectively determine the prediction algorithms for the temperature information, voltage value, current value, and ripple voltage value of the capacitor;

[0032] Using each of the prediction algorithms and the historical status data, estimating the prediction status data at the current moment;

[0033] When the error between the predicted state information and the real-time state information is greater than a preset error threshold, and / or when the real-time state information is greater than a corresponding health threshold, abnormal information of the capacitor is generated.

[0034] In the above technical solution, the control unit uses a health analysis model to predict the changes in various states of the capacitor. When the state information obtained by actual sampling and the predicted information deviate greatly, it is determined that the state of the capacitor has changed suddenly, and an abnormal alarm needs to be issued for the capacitor. In addition, each state is also set with a corresponding health threshold. When the predicted state data exceeds the health threshold, it is also determined that the capacitor is abnormal. This not only helps the capacitor maintenance personnel to take corresponding risk prevention measures on the capacitor in a timely manner and avoid the damage of the damaged capacitor to the circuit and the environment, but also enables the analysis of the capacitor status from multiple angles.

[0035] Optionally, the control unit is further used for:

[0036] According to the real-time temperature information of each of the capacitors, counting the number of capacitors whose real-time temperature information is within a plurality of preset temperature intervals; the plurality of preset temperature intervals include at least one preset alarm temperature interval;

[0037] When the number of capacitors corresponding to the preset alarm temperature range is greater than 0, an over-temperature alarm is issued for the capacitors corresponding to the real-time temperature information in the preset alarm temperature range.

[0038] Optionally, before counting the number of capacitors whose real-time temperature information is within the preset temperature range, the method further includes:

[0039] The total temperature interval is divided into the plurality of preset temperature intervals according to the ambient temperature and the temperature information of all capacitors.

[0040] Optionally, the total temperature interval is divided into the plurality of preset temperature intervals according to the environmental information and the temperature information of all capacitors, including:

[0041] Determining the interval span values ​​of the plurality of preset temperature intervals according to the environmental information;

[0042] The total temperature interval is divided into a plurality of preset temperature intervals according to the interval span value and the temperature information of all the capacitors.

[0043] Optionally, the environmental information includes ambient temperature;

[0044] Determining the interval span values ​​of the plurality of preset temperature intervals according to the environmental information includes:

[0045] According to the ambient temperature and a first mapping table, the interval span value corresponding to the ambient temperature is determined; the first mapping table includes a mapping relationship between multiple ambient temperatures and corresponding interval span values.

[0046] Optionally, according to the interval span value and the temperature information of all the capacitors, the total temperature interval is divided into a plurality of preset temperature intervals, including:

[0047] Determine a temperature range according to the temperature information of all the capacitors; wherein the ratio of the number of capacitors whose temperature information is within the temperature range to the total number of all the capacitors is a preset ratio;

[0048] Determine, according to the temperature range, at least one preset temperature interval in the middle of the total temperature interval;

[0049] The total temperature interval is divided into a plurality of preset temperature intervals according to the interval span value and the preset temperature interval in the middle.

[0050] Optionally, determining the temperature range according to the temperature information of all the capacitors includes:

[0051] Determining a mean value of the temperature information of all the capacitors;

[0052] A temperature range is determined according to the mean value and the temperature information of all the capacitors; the mean value is the mean of two endpoint values ​​of the temperature range.

[0053] Optionally, determining at least one preset temperature interval in the middle of the total temperature interval according to the temperature range includes:

[0054] When the number of the preset temperature intervals is an odd number, the temperature range is determined to be a preset temperature interval in the middle of the total temperature interval;

[0055] When the number of the preset temperature intervals is an even number, the temperature range is divided into two preset temperature intervals located in the middle of the total temperature interval according to the mean value.

[0056] In the above technical solution, according to the temperature distribution of the capacitor, the preset temperature interval in the middle of the total temperature interval is determined, and then the remaining temperature intervals are divided according to the ambient temperature, so as to adaptively adjust the temperature range of the statistical number of capacitors to more accurately determine abnormal capacitors.

[0057] Optionally, the capacitance data analysis device further comprises a display unit;

[0058] The control unit is further used to determine the state data mean value, the state data maximum value and the state data minimum value of each capacitor according to the historical state data of each capacitor;

[0059] The control unit is further used to determine the state data mean, state data maximum and state data minimum of each group of the capacitor groups according to the historical state data of at least one group of capacitor groups; each group of the capacitor groups includes at least one capacitor;

[0060] The display unit is electrically connected to the control unit and is used to display the data and alarms determined or output by the control unit.

[0061] In the above technical solution, the capacitance data analysis device is also provided with a display unit to display the analysis results, relevant data of the capacitance and alarm information, so that the operator of the capacitance data analysis device can grasp the status of the capacitance in time. The capacitance data analysis device also uses the conversion circuit in the power supply unit to provide the corresponding working electrical signal, which simplifies the circuit structure of the display unit and reduces the maintenance cost of the display device.

[0062] The present application provides a capacitance data analysis device, which integrates an acquisition unit, a storage unit, a control unit and a power supply unit, so that the capacitance data analysis device can realize the acquisition of real-time capacitance status information, the storage of data and the analysis using a local capacitance analysis algorithm without calling an external API interface for processing, thereby reducing the demand for network stability. In addition, due to the integration of each unit, the process of installing, configuring and debugging each unit separately is reduced, the deployment process is simplified, and the deployment cost is reduced. When powering each unit, a unified power supply unit is used instead of powering each unit separately, thereby reducing the difficulty of power distribution, simplifying the power supply circuit and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0064] Figure 1A A schematic diagram of an application scenario of a capacitor to be measured provided by the present application according to an exemplary embodiment;

[0065] Figure 1B A schematic diagram of an application scenario of a capacitor to be measured according to another exemplary embodiment of the present application;

[0066] Figure 2 A schematic diagram of the structure of a conventional capacitance data analysis system provided by the present application according to an exemplary embodiment;

[0067] Figure 3 A schematic diagram of the connection between a capacitance data analysis device and a capacitance to be measured provided by the present application according to an exemplary embodiment;

[0068] Figure 4 A schematic diagram of the structure of a capacitance data analysis device provided by the present application according to an exemplary embodiment;

[0069] Figure 5 A schematic diagram of the structure of a power supply unit provided by the present application according to an exemplary embodiment;

[0070] Figure 6 A schematic diagram of the structure of a capacitance data analysis device provided by the present application according to another exemplary embodiment;

[0071] Figure 7 The present invention is a flowchart of a method for using a capacitance data analysis device according to an exemplary embodiment of the present invention.

[0072] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0073] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0074] With the gradual development of electronic technology, capacitors are widely used in electronic and electrical circuits in data centers, low-voltage power distribution systems and other application scenarios due to their functions of filtering, power factor compensation, energy storage, DC isolation, and providing high-precision stable output AC power.

[0075] Figure 1A An uninterruptible power supply device in a data center provided by an exemplary embodiment of the present application includes an input device 101, a rectifier 102, an inverter 103, and an output device 104 electrically connected in series, and a capacitor group is also electrically connected to the busbar electrically connected between the devices, wherein a first capacitor group 105 is electrically connected to the busbar between the input device 101 and the rectifier 102, a second capacitor group 106 is electrically connected to the busbar between the rectifier 102 and the inverter 103, and a third capacitor group 107 is electrically connected to the busbar between the inverter 103 and the output device 104. The first capacitor group 105 and the third capacitor group 107 can perform filtering and voltage stabilization, and the second capacitor group 106 can perform filtering and DC isolation to ensure that the uninterruptible power supply device provides a stable target electrical signal and ensures stable operation of the data center.

[0076] Figure 1B A schematic diagram of the structure of a low-voltage power distribution system provided for an exemplary embodiment of the present application, in which a transformer 201, a compensation cabinet 202 and a feed cabinet 203 are included. The transformer 201 converts the high-voltage mains power into the low-voltage mains power, and the compensation cabinet 202 compensates for the power factor obtained by it to improve the efficiency of electric energy use, and transmits the compensated electrical signal to the feed cabinet 203 for electric energy distribution, providing the corresponding required electric energy for the load. During the operation of the compensation cabinet 202, the capacitor group 204 electrically connected thereto is mainly used to compensate the power factor of the low-voltage mains power, and to filter the low-voltage mains power transmitted to the feed cabinet 203.

[0077] In both of the above application scenarios, capacitors play an important role. When a capacitor fails, it will not only affect the operation of the circuit to which it is applied, but also cause accidents such as explosion and fire. Therefore, it is necessary to monitor the status of the capacitor.

[0078] In the prior art, a capacitance data analysis system is generally used to monitor, analyze and predict the state of capacitance devices in the target area. The circuit structure of the capacitance data analysis system is as follows: Figure 2 As shown, it includes multiple sensors, multiple collectors, a server 307 and multiple displays, each sensor is connected to a corresponding collector, each collector is connected to the server 307, and the server 307 is connected to each display. The deployment locations of each collector, server and display are different.

[0079] exist Figure 2In the schematic diagram shown, there are two capacitor groups to be measured, including a first capacitor group 303 and a second capacitor group 306. Each capacitor group is equipped with at least one sensor to sample relevant information. The first sensor 301 samples relevant information of the first capacitor group 303, and the second sensor 304 samples relevant information of the second capacitor group 306. Sensors at different locations transmit sampled data to the server 307 through different samplers. The first sensor 301 transmits the sampled data of the first capacitor group 303 to the server 307 through the first sampler 302, and the second sensor 304 transmits the sampled data of the second capacitor group 306 to the server 307 through the second collector 305.

[0080] The server 307 is a large physical computer that can process the data collected by each collector to determine the health status of each capacitor group under test. In some embodiments, the server 307 is also connected to the cloud server for communication, and processes the capacitor data by calling the capacitor analysis API (Application Programming Interface) provided by the cloud server, and wirelessly transmits the analysis results to the corresponding display device for display. Among them, the first display 308 is a display device for displaying the analysis results and real-time status of the first capacitor group 303, and the second display 309 is a display device for displaying the analysis results and real-time status of the second capacitor group 306.

[0081] In the above-mentioned capacitance data analysis system, each collector, server, and display are deployed in different areas respectively. In each area, the installation position is analyzed according to the environment, and corresponding debugging is performed on each device during the installation process. Since the connection of each device in the capacitance data analysis system is a communication connection, the communication debugging of each device is the key to ensure the stable operation of the capacitance data analysis system.

[0082] In addition, the power supply requirements for the normal operation of each device are also different. Therefore, different wires or cables and related voltage conversion equipment need to be deployed for different devices to ensure the stable operation of each device. Even for devices with different power requirements in the same area, circuits are deployed separately, resulting in complex deployment process of power supply facilities for the capacitance data analysis system and complex circuit structure of the power supply facilities.

[0083] The cost of producing and maintaining the capacitance data analysis system is high, the deployment process is complicated, and the construction period is long.

[0084] Therefore, building a capacitance data analysis device with simple deployment and low production and maintenance costs has become a research focus.

[0085] The present application provides a capacitance data analysis device for solving the above problems. The technical concept of the present application is to build a capacitance data analysis device that integrates data sampling, data storage, and data analysis functions. A lightweight capacitance analysis algorithm built for the measured capacitance is stored locally in the device, and the state of the capacitance can be analyzed without calling an external API interface. During the operation of the device, there is no need to consider the debugging and maintenance of the network, which reduces the demand for network stability. In addition, due to the integration of each unit, the process of installing, configuring, and debugging each unit separately is reduced, the deployment process is simplified, and the deployment cost is reduced. When powering each unit, a unified power supply unit is used instead of each unit being powered separately, which reduces the difficulty of power distribution, simplifies the power supply circuit, and saves production costs.

[0086] Figure 3 FIG. 1 is a schematic diagram of the connection relationship between the capacitance data analysis device and the capacitance group to be measured according to an exemplary embodiment of the present application. Figure 3 As shown, the capacitance data analysis device 40 is electrically connected to a plurality of sensors, each of which is disposed near the capacitance group to be measured. In one embodiment, the capacitance data analysis device 40 and each of the sensors are electrically connected via a network cable to ensure the stability of information transmission between the sensor and the capacitance data analysis device, and to prevent data loss or data transmission delay due to poor network signals.

[0087] When the relevant information of the first capacitor group 303 and the second capacitor group 306 are analyzed respectively, the first sensor 301 is placed on the surface or surrounding environment of the first capacitor group 303, and the second sensor 304 is placed on the surface or surrounding environment of the second capacitor group 306.

[0088] More specifically, for the type of data required by the capacitance data analysis device 40, each sensor is provided with a plurality of different sampling units: a temperature sampling unit, a voltage sampling unit, and a current sampling unit. The number of each sampling unit is at least one.

[0089] The capacitance data analysis device 40 acquires the data transmitted by each sensor, and analyzes the data sampled by each capacitance group in turn to determine the state of each capacitance group.

[0090] The specific circuit structure of the capacitance data analysis device 40 is explained below. Figure 4 As shown, it includes: a collection unit 401, a control unit 402, a storage unit 403 and a power supply unit 404.

[0091] The acquisition unit 401 is used to obtain real-time status information of at least one capacitor and transmit the real-time status information to the control unit 402 .

[0092] In one embodiment, the real-time status information includes real-time temperature information.

[0093] In other embodiments, the real-time status information includes real-time temperature information, environmental information, voltage, current, and ripple voltage.

[0094] After obtaining the above real-time status information, the acquisition unit 401 performs protocol conversion on the information and transmits it to the control unit 402 .

[0095] The storage unit 403 is used to store the historical status information and historical alarm information of each capacitor.

[0096] In one embodiment, the historical status information includes historical temperature information.

[0097] In other embodiments, the historical status information also includes historical current, historical voltage, and historical ripple voltage.

[0098] The control unit 402 is electrically connected to the acquisition unit 401 and the storage unit 403, and is used to obtain the historical status information and historical alarm information of each capacitor from the storage unit 403, and use the capacitor analysis algorithm stored locally to process the real-time status information, historical status information, and historical alarm information, and output the capacitor status analysis result. The status analysis result includes the health status of the capacitor.

[0099] The capacitance analysis algorithm is an analysis algorithm constructed for the measured capacitance monitored by the capacitance data analysis device 40 or the state characteristics of the measured capacitance.

[0100] The power supply unit 404 is electrically connected to the collection unit 401 , the storage unit 403 , and the control unit 402 , respectively, and is used to provide corresponding power supply to the collection unit 402 , the storage unit 403 , and the control unit 402 .

[0101] In the above technical solution, the capacitance data analysis device integrates the acquisition unit, storage unit, control unit and power supply unit, so that the capacitance data analysis device can realize the collection of capacitance real-time status information, data storage and analysis using the local capacitance analysis algorithm without calling the external API interface for processing, thereby reducing the demand for network stability. In addition, due to the integration of each unit, the process of installing, configuring and debugging each unit separately is reduced, the deployment process is simplified, and the deployment cost is reduced. When powering each unit, a unified power supply unit is used instead of powering each unit separately, thereby reducing the difficulty of power distribution, simplifying the power supply circuit and saving production costs.

[0102] The specific circuit structure of the power supply unit 404 is explained below. Figure 5 As shown, the power supply unit 404 includes a lightning protection circuit 405 , a conversion circuit 406 , and an output filter circuit 407 .

[0103] The lightning protection circuit 405 is electrically connected to the conversion circuit 406 , and the conversion circuit 406 is electrically connected to the output filter circuit 407 .

[0104] The lightning protection circuit 405 is electrically connected to a group of terminals, and is used to receive the mains power and discharge the lightning current impulse energy and the operation surge impulse energy contained in the mains power.

[0105] The conversion circuit 406 is used to convert the mains power into the DC signal required by each non-power unit, that is, the conversion circuit 406 includes a rectifier circuit. In this application document, the non-power unit includes a collection unit 401, a storage unit 403 or a control unit 402.

[0106] The output filter circuit 407 is used to filter out the ripple voltage in the DC signal and transmit the filtered DC signal to each non-power supply unit.

[0107] More specifically, the conversion circuit 406 includes a mains conversion circuit 4061, multiple secondary conversion circuits 4062, and the number of output filter circuits 407 is set to be the same as the number of secondary conversion circuits 4062. In some embodiments, the output filter circuit 407 and the secondary conversion circuit 4062 are electrically connected in a one-to-one correspondence.

[0108] The AC power conversion circuit 4061 is electrically connected to the lightning protection circuit 405, and is used to obtain AC power and rectify the AC power into a first DC signal;

[0109] Each secondary conversion circuit 4062 is electrically connected to the mains conversion circuit 4061, and is used to convert the first DC signal into a second DC signal, and the voltage value of the first DC signal is different from the voltage value of the second DC signal, that is, the secondary conversion circuit 4062 is a DC-DC circuit. The voltage value of the second DC signal is the same as the DC signal required by the non-power supply unit electrically connected to the secondary conversion circuit 4062. In one embodiment, the voltage value that can be provided by the secondary conversion circuit 4062 includes 12V or 5V.

[0110] Each output filter circuit 407 is electrically connected to the corresponding secondary conversion circuit 4062 and the corresponding non-power supply unit, and is used to filter out the ripple voltage in the electrical signal generated by the corresponding secondary conversion circuit 4062, so as to improve the working stability of the device.

[0111] In the above technical scheme, by setting the lightning protection circuit and the AC power change circuit, unified protection and voltage reduction operation of the power supply unit are realized, and corresponding regulation is performed using multiple secondary conversion circuits according to the power supply voltage required by each unit. This not only meets the power supply of the entire capacitance data analysis equipment, but also simplifies the circuit structure for powering each device during the capacitance data analysis process, simplifies the installation, debugging, and maintenance process, and reduces costs.

[0112] The specific functions of the control unit 402 are explained below.

[0113] In some embodiments, the capacitance analysis algorithm stored in the control unit 402 includes a health analysis model. The control unit 402 compares the real-time status information with the historical status information corresponding to the historical alarm information using the health analysis model, and when each state in the real-time status information is within a preset fluctuation range of the state corresponding to the target historical status information, determines that the capacitor is in a fault state, and generates historical alarm information corresponding to the target historical status information.

[0114] That is to say, when the real-time temperature is within the preset fluctuation range of the historical temperature in the target historical state, the voltage is within the preset fluctuation range of the historical voltage in the target historical state, the current is within the preset fluctuation range of the historical current in the target historical state, and the ripple voltage is within the preset fluctuation range of the historical ripple voltage in the target historical state, it is determined that the fault state of the capacitor is the same as the fault state of the historical alarm corresponding to the target historical state.

[0115] The historical alarm information includes temperature information, voltage value, current value and ripple voltage value sampled by the capacitor at at least one historical moment, and alarm information that the capacitor is in a fault state determined based on the sampled state information at the historical moment.

[0116] In other embodiments, the control unit 402 also uses a health analysis model to process historical status information, determines a corresponding prediction algorithm by analyzing the changing trends of the temperature information, voltage value, current value, and ripple voltage value of the capacitor, and then uses each prediction algorithm and historical status data to estimate the predicted status data at the current moment. When the error between the predicted status information and the real-time status information is greater than a preset error threshold, and / or when the predicted status data is greater than the corresponding health threshold, abnormal information of the capacitor is generated.

[0117] In the above technical solution, the control unit uses a health analysis model to predict the changes in various states of the capacitor. When the state information obtained by actual sampling and the predicted information deviate greatly, it is determined that the state of the capacitor has changed suddenly, and an abnormal alarm needs to be issued for the capacitor. In addition, each state is also set with a corresponding health threshold. When the predicted state data exceeds the health threshold, it is also determined that the capacitor is abnormal. This not only helps the capacitor maintenance personnel to take corresponding risk prevention measures on the capacitor in a timely manner and avoid the damage of the damaged capacitor to the circuit and the environment, but also enables the analysis of the capacitor status from multiple angles.

[0118] In some other embodiments, the control unit 402 is further configured to:

[0119] According to the real-time temperature information of each capacitor, the number of capacitors whose real-time temperature information is in multiple preset temperature intervals is counted, and the multiple preset temperature intervals include at least one preset alarm temperature interval; for example: the number of capacitors in the following temperature intervals at the same time is counted: 0~20°, 20°~30°, 30°~40°, 40°~50°, 50°~60°, 60°~70°, 70°~maximum preset temperature.

[0120] When the number of capacitors corresponding to the preset alarm temperature range is greater than 0, an over-temperature alarm is issued for the capacitors corresponding to the real-time temperature information in the preset alarm temperature range.

[0121] For example, when the capacitor temperature exceeds 60°, the capacitor has an over-temperature abnormality. Therefore, when the number of the two temperature intervals of 60° to 70° and 70° to the maximum preset temperature in the statistical data is greater than 0, the identification of the capacitor in the interval is obtained to perform the corresponding alarm operation.

[0122] Among them, the number of multiple preset temperature intervals is fixed, and the control unit 402 can evenly divide the total temperature interval according to the preset interval span value, and can also divide the total temperature interval into multiple preset temperature intervals according to the ambient temperature and the temperature information of all capacitors.

[0123] According to the ambient temperature and the temperature information of all capacitors, the interval span values ​​of multiple preset temperature intervals are determined according to the ambient information, and the total temperature interval is divided into multiple preset temperature intervals according to the interval span values ​​and the temperature information of all capacitors.

[0124] When determining the interval span value, the ambient temperature is obtained from the ambient information, and the interval span value corresponding to the ambient temperature is determined according to the ambient temperature and the first mapping table. The first mapping table includes a mapping relationship between multiple ambient temperatures and corresponding interval span values. The higher the ambient temperature, the smaller the corresponding interval span value. For example: when the ambient temperature is less than 30°, the interval span value is 10, and when the ambient temperature is greater than or equal to 30°, the interval span value is 5.

[0125] In one embodiment, the total temperature interval can be directly divided according to the interval span value obtained above and the temperature information of all capacitors. That is, the mean value (which can also be the median or mean value of multiple statistical data such as mean, median, mode, etc., and the mean value of capacitor temperature is used as an example for explanation below) is determined from the temperature information of all capacitors. When the number of preset temperature intervals is an odd number, the mean value is determined as the median value of the preset temperature interval located in the middle of the total temperature interval, that is, the interval span value of the preset temperature interval located in the middle of the total temperature interval is the interval span value determined above, and the mean value of the two endpoint values ​​of the preset interval is the mean value determined above; when the number of preset temperature intervals is an even number, the mean value is determined as the endpoint values ​​of the two preset temperature intervals located in the middle of the total temperature interval.

[0126] After determining at least one preset temperature interval in the middle, a plurality of other preset temperature intervals before and after the at least one preset temperature interval in the middle of the total temperature interval are divided according to the interval span value.

[0127] For example: when the total temperature interval is 0-100°, and the number of preset temperature intervals is 7, the interval span value is determined to be 10 according to the ambient temperature, and the average value is determined to be 55 according to the temperature information of all capacitors, then the preset temperature interval in the middle of the total temperature interval is 50°-60°, and then the other temperature intervals before and after the above-mentioned preset temperature interval are determined according to the interval span value: 0°-30°, 30°-40°, 40°-50°, 60°-70°, 70°-80°, 80°-100°.

[0128] When the total temperature interval is 0-100°, and the number of preset temperature intervals is 8, the interval span value is determined to be 10 according to the ambient temperature, and the average value is determined to be 55 according to the temperature information of all capacitors, then the preset temperature interval in the middle of the total temperature interval is 45°-55° and 55°-65°, and then the other temperature intervals before and after the above-mentioned preset temperature intervals are determined according to the interval span value: 0°-25°, 25°-35°, 35°-45°, 65°-75°, 75°-85°, 85°-100°.

[0129] In other embodiments, when multiple preset temperature intervals are determined, the temperature range is determined based on the temperature information of all capacitors, wherein the ratio of the number of capacitors whose temperature information is within the temperature range to the total number of all capacitors is a preset ratio (e.g., 80%). Based on the temperature range determined above, at least one preset temperature interval in the middle of the total temperature interval is determined, and then based on the environmental information, the span value of the divided interval is determined, and the total temperature interval is divided into multiple preset temperature intervals based on the interval span value and the preset temperature interval in the middle.

[0130] When determining the temperature range based on the temperature information of all capacitors, the mean of the temperature information of all capacitors is first determined, and then the temperature range is determined based on the mean and the temperature information of all capacitors; the mean is the mean of the two endpoints of the temperature range.

[0131] When the number of preset temperature intervals is an odd number, the temperature range is determined as a preset temperature interval located in the middle of the total temperature interval; when the number of preset temperature intervals is an even number, the temperature range is split into two temperature preset temperature intervals located in the middle of the total temperature interval according to the mean.

[0132] For example, the total temperature range is divided into 8 preset temperature intervals, and the temperature distribution state of all capacitors is determined, and the temperature with the largest number of distributions is determined as the central axis. On both sides of the central axis, the capacitor temperature range containing 80% of the total amount of all capacitors is counted as the total preset temperature interval in the middle, and the total interval is divided (for example: equally divided) as the fourth and fifth intervals, and then the interval span value is determined according to the environmental information (ambient temperature, humidity, etc.), wherein the interval span value corresponding to different environmental information is different. Then, in the temperature range before the fourth interval, the third interval and the second interval are determined according to the interval span value, and the remaining temperature range is the first interval; similarly, in the temperature range after the fifth interval, the sixth interval and the seventh interval are determined according to the interval span value, and the remaining temperature range is the eighth interval.

[0133] In other embodiments, after determining the preset temperature interval in the middle of the total temperature interval according to the above process, the endpoint values ​​of the preset temperature interval will also be adjusted. The minimum value of the preset temperature interval is reduced to a multiple of the interval span value, and the maximum value of the preset temperature interval is increased by a multiple of the interval span value, thereby determining the final preset temperature interval. For example: when it is determined that the preset temperature interval in the middle is 57.2 to 73.4, and the interval span value is 5, the minimum value of the preset temperature interval is adjusted to 55, and the maximum value of the preset temperature interval is adjusted to 75.

[0134] In the above technical solution, according to the temperature distribution of the capacitor, the preset temperature interval in the middle of the total temperature interval is determined, and then the remaining temperature intervals are divided according to the ambient temperature, so as to adaptively adjust the temperature range of the statistical number of capacitors to more accurately determine abnormal capacitors.

[0135] In some other embodiments, the control unit 402 is further configured to:

[0136] For each capacitor, the real-time status information of the capacitor is compared with the real-time status information of other capacitors to obtain a corresponding status error. When each status error is greater than a second preset error threshold, an abnormal status alarm is issued for the capacitor.

[0137] That is to say, at the same moment, the difference in status information of capacitors in similar environments and similar circuit positions should be less than a preset threshold. If the difference between the status information of a capacitor (for example, temperature information) and the status information of the same type of other capacitors is greater than the preset threshold corresponding to the data type, it is determined that the capacitor is abnormal and the control unit needs to issue an alarm.

[0138] In some other embodiments, the control unit 402 is further configured to perform statistics on the sampled data, including:

[0139] According to the historical state data of each capacitor, the state data average value, the state data maximum value and the state data minimum value of each capacitor are determined.

[0140] According to the historical status data of at least one group of capacitor groups, the status data mean, status data maximum and status data minimum of each group of capacitor groups are determined; each group of capacitor groups includes at least one capacitor.

[0141] In the above technical solution, by comparing the capacitor data horizontally and vertically, it is analyzed from multiple dimensions whether the capacitor state is abnormal, and risk prevention measures are taken for the capacitor in time to prevent the damaged capacitor from damaging the circuit and the environment.

[0142] In some other embodiments, the capacitance data analysis device 40 further includes a display unit 408, and its circuit connection relationship with other units in the capacitance data analysis device 40 is as follows: Figure 6 As shown, the display unit 408 is electrically connected to the control unit 402 and the power supply unit 404 respectively.

[0143] A secondary conversion circuit in the power supply unit 404 can perform voltage conversion to provide the operating voltage for the display unit 408 .

[0144] The display unit 408 receives the content transmitted by the control unit 402 and displays the content, including sampling data, statistical data, alarm data, prediction data, capacitor temperature change curve, etc.

[0145] The following is an explanation of how to use the capacitance data analysis equipment.

[0146] Figure 7 FIG. 1 is a flow chart of a method for using a capacitance data analysis device according to an exemplary embodiment of the present application. Figure 7 As shown, including:

[0147] Step 501: The system is powered on and the capacitance data analysis device is running.

[0148] After the capacitance data analysis device is running, it starts to obtain data collected by each sensor, including temperature data.

[0149] Step 502: Determine whether the temperature of the capacitor under test is greater than a preset threshold.

[0150] When the temperature is greater than the preset threshold, the process proceeds to step 507 ; when the temperature is less than or equal to the preset threshold, the process proceeds to step 503 .

[0151] Step 503: Determine whether the sensor is offline.

[0152] When the capacitance data analysis device continuously receives data transmitted by the sensor, it also transmits a monitoring signal to the sensor at a preset time interval. When a feedback signal of the monitoring signal is received, it is determined that the sensor is online, otherwise, it is determined that the sensor is offline.

[0153] If the sensor is online, go to step 504 ; if the sensor is offline, go to step 507 .

[0154] Step 504: Perform multi-angle analysis on the measured capacitance.

[0155] The above analysis process includes analyzing the data using a capacitance analysis algorithm, and also includes statistics and comparison of the data to obtain analysis results.

[0156] More specifically, the analysis process of the measured capacitance has been described in the above explanation of the control unit and will not be repeated here.

[0157] Step 505: Determine whether the capacitor under test has a fault.

[0158] According to the analysis result of step 504, it is compared with the corresponding fault judgment condition. For example, the number of capacitors with a temperature between 70° and the maximum preset temperature is compared with 0. When it is greater than 0, it is determined that the capacitors in this range have faults.

[0159] If the fault judgment condition is met, it is determined that the capacitor under test has a fault, and the process proceeds to step 507 ; otherwise, it is determined that the capacitor under test has no fault, and the process proceeds to step 506 .

[0160] Step 506: Display the analysis result of the measured capacitance.

[0161] Step 507: Alarm.

[0162] The alarm operation of the capacitance data analysis device includes at least one of the following: displaying alarm information on an interface of a display unit, issuing a buzzer alarm, and transmitting alarm information to a terminal device associated with the capacitance data analysis device.

[0163] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0164] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A capacitance data analysis device, characterized in that: include: A collection unit, used to obtain real-time status information of at least one capacitor and transmit the real-time status information to a control unit; A storage unit, used to store historical status information and historical alarm information of each of the capacitors; The control unit is electrically connected to the acquisition unit and the storage unit, and is used to obtain the historical status information and the historical alarm information of each capacitor from the storage unit, and use the capacitor analysis algorithm stored locally to process the real-time status information, the historical status information, and the historical alarm information, and output the status analysis result of the capacitor; the status analysis result includes the health status of the capacitor; A power supply unit is electrically connected to the collection unit, the storage unit and the control unit respectively, and is used to provide corresponding power supply to the collection unit, the storage unit and the control unit.

2. The device according to claim 1, characterized in that The power supply unit includes a lightning protection circuit, a conversion circuit and an output filter circuit; The lightning protection circuit is used to receive the mains power and discharge the lightning current impulse energy and operation surge impulse energy contained in the mains power; The conversion circuit is electrically connected to the lightning protection circuit, and is used to convert the mains power into a DC signal required by each non-power unit; the non-power unit includes the acquisition unit, the storage unit or the control unit; The output filter circuit is electrically connected to the conversion circuit, and is used to filter out the ripple voltage in the DC signal, and transmit the filtered DC signal to each of the non-power supply units.

3. The device according to claim 2, characterized in that The conversion circuit includes a mains conversion circuit and a plurality of secondary conversion circuits, and the number of the output filter circuits is the same as the number of the secondary conversion circuits; The mains power conversion circuit is electrically connected to the lightning protection circuit, and is used to obtain the mains power and rectify the mains power into a first direct current signal; Each of the secondary conversion circuits is electrically connected to the mains conversion circuit, and is used to convert the first DC signal into a second DC signal, wherein the voltage value of the first DC signal is different from the voltage value of the second DC signal, and the voltage value of the second DC signal is the same as the DC signal required by the non-power supply unit electrically connected to the secondary conversion circuit; Each of the output filter circuits is electrically connected to a corresponding secondary conversion circuit and a corresponding non-power supply unit.

4. The device according to any one of claims 1 to 3, characterized in that The input end of the acquisition unit is electrically connected to the first end of the network cable, and the second end of the network cable is electrically connected to the sensor; The sensor is used to collect real-time status information of the capacitor; the real-time status information also includes the voltage value, current value and ripple voltage value of the capacitor; The sensor is arranged on the surface of the capacitor to be measured or in the space where the capacitor to be measured is located.

5. The device according to claim 4, characterized in that The state information includes temperature information, environmental information, voltage value, current value, and ripple voltage value; the capacitance analysis algorithm includes a health analysis model; The control unit processes the real-time status information, the historical status information, and the historical alarm information using a capacitance analysis algorithm stored locally, and outputs a status analysis result of the capacitance, including: The control unit compares the real-time status information with the historical status information corresponding to the historical alarm information by using the health analysis model, and determines that the capacitor is in a fault state when each state in the real-time status information is within a preset fluctuation range of the state corresponding to the target historical status information, and generates historical alarm information corresponding to the target historical status information; The historical alarm information includes temperature information, voltage value, current value and ripple voltage value sampled by the capacitor at at least one historical moment, and alarm information that determines that the capacitor is in a fault state based on the sampled state information at the historical moment.

6. The device according to claim 5, characterized in that The control unit uses the health analysis model to process the real-time status information, the historical status information, and the historical alarm information to determine the health status of the capacitor, including: The control unit processes the historical status information using the health analysis model to respectively determine the prediction algorithms for the temperature information, voltage value, current value, and ripple voltage value of the capacitor; Using each of the prediction algorithms and the historical status data, estimating the prediction status data at the current moment; When the error between the predicted state information and the real-time state information is greater than a preset error threshold, and / or when the real-time state information is greater than a corresponding health threshold, abnormal information of the capacitor is generated.

7. The device according to claim 4, characterized in that The control unit is also used for: According to the real-time temperature information of each of the capacitors, counting the number of capacitors whose real-time temperature information is within a plurality of preset temperature intervals; the plurality of preset temperature intervals include at least one preset alarm temperature interval; When the number of capacitors corresponding to the preset alarm temperature range is greater than 0, an over-temperature alarm is issued for the capacitors corresponding to the real-time temperature information in the preset alarm temperature range.

8. The device according to claim 7, characterized in that Before counting the number of capacitors whose real-time temperature information is within the preset temperature range, the method further includes: The total temperature interval is divided into the plurality of preset temperature intervals according to the environmental information and the temperature information of all the capacitors.

9. The device according to claim 8, characterized in that According to the environmental information and the temperature information of all capacitors, the total temperature interval is divided into the plurality of preset temperature intervals, including: Determining the interval span values ​​of the plurality of preset temperature intervals according to the environmental information; The total temperature interval is divided into a plurality of preset temperature intervals according to the interval span value and the temperature information of all the capacitors.

10. The device according to claim 9, characterized in that The environmental information includes environmental temperature; Determining the interval span values ​​of the plurality of preset temperature intervals according to the environmental information includes: Determine, according to the ambient temperature and the first mapping table, a span value of the interval corresponding to the ambient temperature; The first mapping table includes mapping relationships between multiple ambient temperatures and corresponding interval span values.

11. The device according to claim 9, characterized in that According to the interval span value and the temperature information of all the capacitors, the total temperature interval is divided into a plurality of preset temperature intervals, including: Determine a temperature range according to the temperature information of all the capacitors; wherein the ratio of the number of capacitors whose temperature information is within the temperature range to the total number of all the capacitors is a preset ratio; Determine, according to the temperature range, at least one preset temperature interval in the middle of the total temperature interval; The total temperature interval is divided into a plurality of preset temperature intervals according to the interval span value and the preset temperature interval in the middle.

12. The device according to claim 11, characterized in that According to the temperature information of all the capacitors, a temperature range is determined, including: Determining a mean value of the temperature information of all the capacitors; A temperature range is determined according to the mean value and the temperature information of all the capacitors; the mean value is the mean of two endpoint values ​​of the temperature range.

13. The device according to claim 12, characterized in that Determining at least one preset temperature interval in the middle of the total temperature interval according to the temperature range includes: When the number of the preset temperature intervals is an odd number, the temperature range is determined to be a preset temperature interval in the middle of the total temperature interval; When the number of the preset temperature intervals is an even number, the temperature range is divided into two preset temperature intervals located in the middle of the total temperature interval according to the mean value.

14. The device according to claim 1, characterized in that The capacitance data analysis device further includes a display unit; The control unit is further used to determine the state data mean value, the state data maximum value and the state data minimum value of each capacitor according to the historical state data of each capacitor; The control unit is further used to determine the state data mean, state data maximum and state data minimum of each group of the capacitor groups according to the historical state data of at least one group of capacitor groups; each group of the capacitor groups includes at least one capacitor; The display unit is electrically connected to the control unit and is used to display the data and alarms determined or output by the control unit.

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