CN115598446A - Movable high-capacity high-voltage capacitor parameter detection device and use method - Google Patents
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Abstract
The invention relates to a movable parameter detection device for a high-capacity high-voltage capacitor and a using method, wherein the device comprises the following steps: the device comprises a detection device body, at least one energy storage element, a voltage measuring element, a current measuring element, a waveform recording element and a controller; each energy storage element is arranged in the detection device body and is respectively connected with the quick charging energy supplementing interface and the detection port through a switch element; the quick charging energy supplementing interface is arranged on one side of the detection device body and is used for charging and supplementing energy to the energy storage element; the detection port is arranged on the other side of the detection device body and is used for being connected with a capacitor to be detected or a power module to be detected; the voltage measuring element is connected with the energy storage element in parallel, the current measuring element is connected with the energy storage element in series, and the waveform recording element is used for recording voltage and current waveforms; the controller is communicated with the tested power module through the external signal output end and the feedback signal receiving end, and controls the switch element at the same time. The invention can be widely applied to the field of electronic device detection.
Description
Technical Field
The invention belongs to the field of electronic device detection, and relates to a movable high-capacity high-voltage capacitor parameter detection device and a use method thereof.
Background
The direct current capacitor of the flexible direct current transmission converter valve has higher single body voltage, the rated voltage can be as high as 1-10 kV, in some application occasions, the capacitance value is also very large, and can be as high as 5-20 mF, and the technical specification of the capacitor is far beyond that of a conventional capacitor. In the occasions of equipment maintenance and the like, the capacitance value of the converter valve tower is often required to be measured to determine the health state of the converter valve tower.
However, in detecting a capacitor, it is often necessary to first charge the capacitor and then calculate its capacitance value from the discharge or oscillation curve. When the capacitor is charged, if the capacitance of the capacitor is small (on the order of about several microfarads to several hundred microfarads), a mobile detection device with a built-in battery can be used for power supply. However, for the flexible high-voltage direct-current converter valve, because the capacitance value is large, the capacity of the built-in battery is not enough to meet the detection requirement, and the recharging and energy supplementing time after the capacitor is detected is also long, the requirement of on-site rapid detection cannot be met, and a mode of external power supply (such as 220V or 380V alternating-current power supply) needs to be adopted to provide sufficient electric energy. This limits the portability and mobility of the detection device.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a movable parameter detection device for a high-capacity high-voltage capacitor, which can satisfy the requirement of mobility of the detection device, and can also quickly supplement energy after detection, thereby satisfying the requirement of quick and batch detection on the field of equipment.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a movable high-capacity high-voltage capacitor parameter detection device, including:
the device comprises a detection device body, at least one energy storage element, a voltage measuring element, a current measuring element, a waveform recording element and a controller;
each energy storage element is arranged in the detection device body and is respectively connected with the quick charging energy supplementing interface and the detection port through a switch element;
the quick charging energy supplementing interface is arranged on one side of the detection device body and is used for charging and supplementing energy for the energy storage element;
the detection port is arranged on the other side of the detection device body and is used for being connected with a capacitor to be detected or a power module to be detected;
the voltage measuring element is connected with the energy storage element in parallel, the current measuring element is connected with the energy storage element in series, and the waveform recording element is used for recording voltage and current waveforms acquired by the voltage measuring element and the current measuring element;
the controller is communicated with the tested power module through an external signal output end and a feedback signal receiving end, and controls the switch element at the same time.
Furthermore, the positive electrode of the energy storage element is divided into two paths, one path is connected with the positive electrode of the quick charging energy supplementing interface through a first switch element, the other path is connected with the positive electrode of the detection port through a second switch element and an inductor, and the negative electrode of the energy storage element is respectively connected with the negative electrodes of the quick charging energy supplementing interface and the detection port.
Further, when the number of the energy storage elements is two or more, the energy storage elements are connected in series or in parallel according to actual needs.
Further, the energy storage element is a super capacitor.
Further, the energy storage element adopts a detachable super capacitor.
Further, the capacitance of the energy storage element is larger than that of the capacitor to be measured or the power module to be measured.
Furthermore, the rated voltage of the energy storage element is larger than 100V, and the capacitance is larger than 0.1F.
In a second aspect, the present invention provides a method for using a movable large-capacity voltage capacitor parameter fast device, comprising the following steps:
connecting the detection device with an external power supply through a quick charging energy supplementing interface, charging the energy storage element, and disconnecting the quick charging energy supplementing interface after the charging is finished or when a set value is reached;
connecting the detection device with the tested capacitor or the tested power module through the detection port, and detecting the physical quantity of the tested capacitor or the tested power module;
and calculating to obtain the loss parameters of the measured capacitor or the measured power module based on the physical quantity detection result of the measured capacitor or the measured power module.
Further, the method for connecting the detection device with the capacitor to be detected and detecting the physical quantity of the capacitor to be detected comprises the following steps:
the energy storage element is connected with the capacitor to be detected through the detection port, so that the energy storage element, the inductor and the capacitor to be detected form an oscillating circuit;
the controller controls the voltage measuring element, the current measuring element and the waveform recording element to detect the physical quantity of the capacitor to be detected when the oscillation circuit oscillates.
Further, connecting the detection device with the power module to be detected, and detecting the physical quantity of the power module to be detected, including:
the energy storage element is connected with an output terminal of the tested power module through a detection port, and an external signal output end and a feedback signal receiving end of the detection device are connected with a corresponding port of the tested power module;
a controller in the detection device sends a control command to the power module to be detected through an external signal output end and receives a feedback signal of the power module to be detected through a feedback signal receiving end;
the measured power module controls the on-off of an IGBT in the measured power module according to the control command and sends a feedback signal to the detection device;
after receiving the feedback signal of the power module to be measured through the feedback signal receiving end, the detection device controls the voltage measuring element, the current measuring element and the waveform recording element to detect the related physical quantity of the power module to be measured.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the detection capacitor may be moved off of the power supply.
The traditional detection device needs an external power supply to detect because the capacity of the capacitor is large. When the capacitor to be detected is placed at a dispersed position, a long power supply cable needs to be carried for detection, or the power module needs to be placed in a concentrated mode for detection, so that the mobile detection performance is very limited.
After the detection device is adopted, the energy stored on the super capacitor is enough to meet the requirements of charging and loss in the detection process, so that the detection device can be separated from a power supply to independently perform mobile detection.
2. Multiple capacitors may be detected in succession off the power supply.
In the conventional detection device, since the capacitance of the capacitor is large, an external power supply is required for realizing multiple detections.
After the detection device is adopted, the energy stored on the super capacitor is enough to bear the energy consumption of a plurality of detections, so that the super capacitor can be separated from a power supply after being charged and can be detected for a plurality of times.
3. Can be charged and discharged rapidly.
The traditional detection device adopts an external power supply, so that the problem of charging and energy supplementing does not exist, and the discharging speed of the traditional detection device is limited by the power supply capacity and the output capacity of the detection device. Some devices using batteries as energy storage devices cannot meet the requirements of rapid energy compensation and charging and discharging because the batteries can bear low charging and discharging speed. In addition, the number of charge and discharge cycles of a high storage density battery is up to about 3000, and the long-term life requirement of the detection device cannot be satisfied.
After the detection device is adopted, the charging and discharging times of the super capacitor are as high as tens of thousands of times, and the super capacitor has the capability of high-rate charging and discharging, so that the high working strength of a detection field can be met, and quick energy supplement, charging and discharging and quick detection are realized.
Therefore, the invention can be widely applied to the field of electronic device detection.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a movable high-capacity high-voltage capacitor parameter rapid detection device according to the invention;
FIG. 2 is a circuit wiring diagram of the movable high-capacity high-voltage capacitor parameter rapid detection device of the invention;
FIG. 3 is a wiring diagram of the movable high-capacity high-voltage capacitor parameter rapid detection device applied to detection of a flexible direct current converter valve power module;
the reference symbols in the drawings denote the following:
1. a detection device body; 2. a super capacitor; 3. a quick charging energy supplementing interface; 4. the tested power module of the flexible direct current converter valve; 5. an external signal output terminal; 6. and a feedback signal receiving end.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In some embodiments of the invention, the movable high-capacity high-voltage capacitor parameter detection device is provided, and by utilizing the advantages of small volume, super-large capacitance, high energy density, high charge-discharge multiplying power and the like of a super capacitor, the super capacitor is used as an energy storage element of a high-power movable detection device, so that the direct current capacitor of a flexible direct current transmission converter valve can be quickly detected, the movability of the detection device can be met, meanwhile, the energy can be quickly supplemented after detection, and the requirements of on-site quick and batch detection of equipment are met.
Correspondingly, in other embodiments of the present invention, a method for using a movable parameter detection device for a high-voltage capacitor with large capacity is provided.
Example 1
As shown in fig. 1, the movable high-capacity high-voltage capacitor parameter detection device provided by the invention comprises a detection device body 1, at least one energy storage element 2, a voltage measurement element, a current measurement element, a waveform recording element and a controller. Each energy storage element 2 is arranged in the detection device body 1, and the energy storage elements 2 are respectively connected with the quick charging energy supplementing interface 3 and the detection port through a switch element; the quick charging energy supplementing interface 3 is arranged on one side of the detection device body 1 and is used for charging and supplementing energy to the energy storage element 2; the detection port is arranged on the other side of the detection device body 1 and is used for being connected with the measured capacitor Cx or the measured power module; the voltage measuring element is connected with the energy storage element in parallel, the current measuring element is connected with the energy storage element in series, and the waveform recording element is used for recording voltage and current waveforms collected by the voltage measuring element and the current measuring element; the controller is used for controlling the switch element and communicating with the tested power module.
Further, when the number of the energy storage elements 2 is two or more, each energy storage element 2 may be connected in series or in parallel, and the specific connection mode is determined according to actual needs.
Further, the energy storage element 2 adopts a detachable super capacitor Cs, the rated voltage of the super capacitor is more than 100V, and the capacitance is more than 0.1F.
Furthermore, the positive pole of the energy storage element 2 is divided into two paths, one path is connected with the positive pole of the quick charging energy supplementing interface 3 through the switching element K1, the other path is connected with the positive pole of the detection port through the switching element K2 and the inductor L, and the negative pole of the energy storage element 2 is respectively connected with the quick charging energy supplementing interface 3 and the negative pole of the detection port.
Example 2
Based on the movable high-capacity high-voltage capacitor parameter detection device provided in embodiment 1, the embodiment provides a use method of the movable high-capacity high-voltage capacitor parameter detection device, which includes the following steps:
1) The detection device is connected with an external power supply through a quick charging energy supplementing interface 3, the energy storage element 2 is quickly charged, and the quick charging energy supplementing interface 3 is disconnected after the charging is finished or when a set value is reached;
2) Connecting the detection device with the capacitor Cx to be detected or the power module to be detected through the detection port, and detecting the physical quantity of the capacitor Cx to be detected or the power module to be detected;
3) And calculating the loss parameter of the measured capacitor Cx or the measured power module based on the detection result of the physical quantity of the measured capacitor Cx or the measured power module.
Preferably, the step 2) of detecting the physical quantity of the measured capacitor Cx when the detection device is connected to the measured capacitor Cx includes:
the energy storage element 2 is connected with the capacitor Cx to be detected through the detection port, so that the energy storage element 2, the inductor L and the capacitor Cx to be detected form an oscillating circuit;
the controller controls the voltage measuring element, the current measuring element, and the waveform recording element, and detects physical quantities such as current, voltage, and frequency of the capacitor Cx to be measured when the oscillation circuit oscillates.
Preferably, in step 2), the connecting the detecting device with the power module to be measured and detecting the physical quantity of the power module to be measured includes:
the energy storage element 2 is connected with an output terminal of the tested power module through a detection port, and an external signal output end and a feedback signal receiving end of the detection device are connected with a corresponding port of the tested power module;
a controller in the detection device sends a control command to the measured power module through an external signal output end and receives a feedback signal of the measured power module through a feedback signal receiving end;
the power module to be measured controls the on-off of the IGBT in the power module to be measured according to the control command, and sends a feedback signal to the detection device;
after receiving the feedback signal of the power module to be measured through the feedback signal receiving end, the detection device controls the voltage measuring element, the current measuring element and the waveform recording element to detect the related physical quantity of the power module to be measured.
Example 3
As shown in FIG. 2, the detection apparatus of the present invention is connected to a capacitor Cx to be measured, and the supercapacitor Cs and the inductor L form an oscillation circuit of the capacitor Cx to be measured.
First, the switching element K1 is closed, the switching element K2 is opened, and the fast charging energy compensation interface 3 is powered on. At this time, the external power supply rapidly charges the supercapacitor Cs. When the voltage of the supercapacitor Cs reaches a set value, the switch K1 is automatically or manually opened, and at the moment, the detection device enters a waiting stage.
When the detected capacitor Cx needs to be detected, the switching element K2 is closed, and at the moment, the super capacitor Cs discharges through the inductor L and the detected capacitor Cx and generates L-C oscillation. The physical quantities of current, voltage, frequency and the like during oscillation are detected, namely the capacitance of the capacitor Cx to be detected can be calculated through a formula, the change process of the current and voltage waveforms is detected, and the loss parameters of the capacitor Cx to be detected can also be calculated.
When the parameters are selected, the capacitance of the super capacitor Cs can be higher than that of the capacitor Cx to be detected, the electric energy loss in the oscillation process is very small, and most of energy is recycled into the super capacitor Cs to be stored after the completion of a plurality of complete oscillation cycles, so that the energy loss in the single detection process is very small, and multiple measurements can be performed. This realizes one-time charging and multiple movement measurements.
The rapid charging energy supplementing interface 3 and the supercapacitor Cs can meet the requirement of rapid charging, so that when the electric energy stored in the supercapacitor Cs is reduced to a lower level, the rapid charging energy supplementing interface can supplement energy rapidly, and the supercapacitor Cs can be put into subsequent detection work as soon as possible.
Example 4
As shown in fig. 3, the detection device of the present invention is connected to the output terminal of the flexible dc converter valve, and the external signal output terminal and the feedback signal receiving terminal of the detection device are connected to the corresponding ports of the power module to be measured.
The internal connection of the detection device is the same as that in embodiment 2, and other connection methods may be used.
Firstly, the super capacitor Cs is charged quickly, and when detection is performed, the detection device sends a control command to the measured power module 4 and receives a feedback signal of the measured power module 4. The measured power module 4 controls the on and off of the IGBT inside the module according to the control command, the waveforms of the current, voltage, frequency and other physical quantities of the whole circuit are recorded by the detection device, and can be analyzed according to the recording result to obtain various information of the measured power module 4, such as the capacitance value of the capacitor Cx, the internal loss, the current and voltage of the IGBT, and the like. Therefore, the performance of the whole tested power module is tested.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a movable large capacity high voltage capacitor parameter detection device which characterized in that includes:
the device comprises a detection device body, at least one energy storage element, a voltage measuring element, a current measuring element, a waveform recording element and a controller;
each energy storage element is arranged in the detection device body and is respectively connected with the quick charging energy supplementing interface and the detection port through a switch element;
the quick charging energy supplementing interface is arranged on one side of the detection device body and is used for charging and supplementing energy to the energy storage element;
the detection port is arranged on the other side of the detection device body and is used for being connected with a capacitor to be detected or a power module to be detected;
the voltage measuring element is connected with the energy storage element in parallel, the current measuring element is connected with the energy storage element in series, and the waveform recording element is used for recording voltage and current waveforms collected by the voltage measuring element and the current measuring element;
the controller is communicated with the tested power module through an external signal output end and a feedback signal receiving end, and controls the switch element at the same time.
2. The device for detecting the parameters of the movable high-capacity high-voltage capacitor as claimed in claim 1, wherein the positive electrode of the energy storage element is divided into two paths, one path is connected with the positive electrode of the fast charging energy supplementing interface through a first switch element, the other path is connected with the positive electrode of the detection port through a second switch element and an inductor, and the negative electrode of the energy storage element is respectively connected with the negative electrodes of the fast charging energy supplementing interface and the detection port.
3. The movable high-capacity high-voltage capacitor parameter detection device as claimed in claim 1, wherein when two or more energy storage elements are adopted, each energy storage element is connected in series or in parallel according to actual needs.
4. The movable high-capacity high-voltage capacitor parameter detection device as claimed in claim 1, wherein the energy storage element is a super capacitor.
5. The movable high-capacity high-voltage capacitor parameter detection device as claimed in claim 4, wherein the energy storage element is a detachable super capacitor.
6. The movable high-capacity high-voltage capacitor parameter detection device as claimed in claim 1, wherein the capacitance of the energy storage element is larger than the capacitance of the capacitor to be detected or the capacitance of the power module to be detected.
7. The movable high-capacity high-voltage capacitor parameter detection device as claimed in claim 1, wherein the rated voltage of the energy storage element is greater than 100V, and the capacitance is greater than 0.1F.
8. A use method of the movable high-capacity high-voltage capacitor parameter detection device as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
connecting the detection device with an external power supply through a quick charging energy supplementing interface, charging the energy storage element, and disconnecting the quick charging energy supplementing interface after the charging is finished or when a set value is reached;
connecting the detection device with the detected capacitor or the detected power module through the detection port, and detecting the physical quantity of the detected capacitor or the detected power module;
and calculating to obtain the loss parameter of the measured capacitor Cx or the measured power module based on the physical quantity detection result of the measured capacitor or the measured power module.
9. The method for using the movable high-capacity high-voltage capacitor parameter detection device as claimed in claim 8, wherein the step of connecting the detection device with the capacitor to be detected and detecting the physical quantity of the capacitor to be detected comprises the following steps:
the energy storage element is connected with the capacitor to be detected through the detection port, so that the energy storage element, the inductor and the capacitor to be detected form an oscillating circuit;
the controller controls the voltage measuring element, the current measuring element and the waveform recording element to detect the physical quantity of the capacitor to be measured when the oscillation circuit oscillates.
10. The method for using the movable high-capacity high-voltage capacitor parameter detection device as claimed in claim 8, wherein the step of connecting the detection device with the power module to be measured and detecting the physical quantity of the power module to be measured comprises the following steps:
connecting the energy storage element with an output terminal of the power module to be tested through a detection port, and connecting an external signal output end and a feedback signal receiving end of the detection device with a corresponding port of the power module to be tested;
a controller in the detection device sends a control command to the measured power module through an external signal output end and receives a feedback signal of the measured power module through a feedback signal receiving end;
the measured power module controls the on-off of an IGBT in the measured power module according to the control command and sends a feedback signal to the detection device;
after receiving the feedback signal of the power module to be measured through the feedback signal receiving end, the detection device controls the voltage measuring element, the current measuring element and the waveform recording element to detect the related physical quantity of the power module to be measured.
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| CN202211308870.6A CN115598446A (en) | 2022-10-25 | 2022-10-25 | Movable high-capacity high-voltage capacitor parameter detection device and use method |
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| CN202211308870.6A CN115598446A (en) | 2022-10-25 | 2022-10-25 | Movable high-capacity high-voltage capacitor parameter detection device and use method |
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|---|---|---|---|---|
| CN217543291U (en) * | 2022-03-24 | 2022-10-04 | 中国电力科学研究院有限公司 | Device for determining explosion-proof performance of direct-current support capacitor shell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN217543291U (en) * | 2022-03-24 | 2022-10-04 | 中国电力科学研究院有限公司 | Device for determining explosion-proof performance of direct-current support capacitor shell |
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