CN217543291U - Device for determining explosion-proof performance of direct-current support capacitor shell - Google Patents
Device for determining explosion-proof performance of direct-current support capacitor shell Download PDFInfo
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- CN217543291U CN217543291U CN202220664787.1U CN202220664787U CN217543291U CN 217543291 U CN217543291 U CN 217543291U CN 202220664787 U CN202220664787 U CN 202220664787U CN 217543291 U CN217543291 U CN 217543291U
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Abstract
The utility model discloses a device for confirming direct current supports capacitor case explosion-proof performance, the device includes: a dc tank circuit comprising: the direct current power supply is used for charging the energy storage capacitor, so that energy is stored in the energy storage capacitor, and the energy storage capacitor is used as a loop power supply of a pulse discharge loop; a pulsed discharge circuit comprising: the adjustable inductor and the test capacitor are connected in series with the energy storage capacitor after being connected in series; the energy storage capacitor injects the internally stored energy into the test capacitor through pulse discharge so as to carry out explosion resistance test on the test capacitor; the direct current power supply is a controllable constant current charging power supply. The utility model discloses a device can ensure guarantee testing personnel's personal safety, can improve test efficiency, can realize the high-efficient explosion-proof performance who accurately confirms the condenser.
Description
Technical Field
The utility model relates to a high voltage test technical field to more specifically, relate to a device for confirming direct current supports capacitor case and is able to bear or endure explosion the performance.
Background
The direct current support capacitor is one of core group components of the current converter, is used as an energy storage element, plays roles of voltage support, harmonic filtering and the like, is limited by conditions such as fire protection level, energy storage density and the like, and can meet requirements only by adopting a self-healing capacitor. The self-healing direct current support capacitor has the advantages of small volume, light weight, high fire-proof level, high energy storage density and the like, and is widely applied to the fields of flexible direct current transmission engineering, rail transit, wind power photovoltaic and the like.
The DC support capacitor has the characteristics of large capacity and high working voltage. During operation, the dc support capacitor stores a significant amount of energy internally. If the DC support capacitor is short-circuited in metal in operation, the stored energy will be released instantaneously, and a large amount of gas will be generated in the DC support capacitor. If the direct current support capacitor shell is not strong enough, violent explosion is easy to generate, equipment is damaged, and personal safety is threatened. Therefore, the explosion-proof performance of the shell of the direct current support capacitor needs to be tested, and the safety of equipment during operation is ensured.
In the existing standard, a tolerance sample, tolerance energy, a test loop and a test method of a shell explosion-proof test with the frequency of 50Hz applied to a high-voltage parallel capacitor, a filter capacitor and a series capacitor of a power system are specified. The internal structure, the used materials and the electrical parameters of the alternating current power capacitor and the direct current support capacitor are different. Besides, the explosion-proof test energy of the AC power capacitor is about 15KJ, and the explosion-proof test injection energy of the DC support capacitor can reach more than 40 KJ. The test loop in the current standard is difficult to apply directly to dc support capacitors.
Disclosure of Invention
The utility model provides a device for confirming direct current supports capacitor case explosion-proof performance to solve the problem of how to carry out the experiment to capacitor case's explosion-proof performance.
In order to solve the above problem, according to an aspect of the present invention, there is provided an apparatus for determining explosion resistance of a dc support capacitor case, the apparatus comprising: the direct current energy storage loop and the pulse discharge loop are connected; wherein, the first and the second end of the pipe are connected with each other,
the direct current energy storage loop comprises: the direct current power supply is used for charging the energy storage capacitor, so that energy is stored in the energy storage capacitor, and the energy storage capacitor is used as a loop power supply of a pulse discharge loop;
the pulse discharge circuit includes: the adjustable inductor and the test capacitor are connected in series with the energy storage capacitor after being connected in series; the energy storage capacitor injects the internally stored energy into the test capacitor through pulse discharge so as to carry out explosion resistance test on the test capacitor;
the direct current power supply is a controllable constant current charging power supply.
Preferably, the dc energy storage circuit further includes: one end of the charging switch is connected with the positive electrode of the direct current power supply, the other end of the charging switch is connected with the positive electrode of the energy storage capacitor, and the negative electrode of the direct current power supply is connected with the negative electrode of the energy storage capacitor and grounded; and controlling the direct-current power supply to charge the energy storage capacitor by turning on the charging switch, wherein the charging energy stored by the energy storage capacitor is the energy of the sample capacitor under the rated voltage.
Preferably, the dc energy storage circuit further includes: the energy release device comprises an energy release switch and an energy release resistor, wherein one end of the energy release switch is respectively connected with the positive electrode of a direct-current power supply and the positive electrode of an energy storage capacitor, the other end of the energy release switch is connected with one end of the energy release resistor, and the other end of the energy release resistor is connected with a ground wire; and controlling the energy stored in the energy storage capacitor to be released through the energy release resistor by switching on the energy release switch.
Preferably, the dc energy storage circuit further includes: and the high-precision voltmeter is used for acquiring voltage data at two ends of the energy storage capacitor and returning the voltage data to the direct current power supply so that the direct current power supply controls whether to charge the energy storage capacitor according to the voltage data.
Preferably, the pulse discharge circuit further comprises: a pulse discharge switch and a short circuit switch; wherein the content of the first and second substances,
one end of the pulse discharge switch is connected with the anode of the energy storage capacitor, the other end of the pulse discharge switch is connected with one end of the test article capacitor, one end of the adjustable inductor is respectively connected with the cathode of the energy storage capacitor and the ground, and the other end of the adjustable inductor is connected with the other end of the test article capacitor; controlling the energy storage capacitor to inject the internally stored energy into the sample capacitor by turning on the pulse discharge switch;
the short circuit switch is connected with the test sample capacitor in parallel, and two ends of the test sample capacitor are in short circuit through the short circuit switch so as to carry out loop discharge.
Preferably, wherein the shorting switch has a resistive copper conductor built in.
Preferably, the pulsed discharge switch comprises: the trigger copper needle is arranged above the tungsten copper electrode; when energy needs to be injected into the test article capacitor, the copper needle above the tungsten copper electrode is controlled to fall off, the gap between the electrodes is reduced, and a discharge loop is formed, so that the energy stored in the energy storage capacitor is injected into the test article capacitor.
Preferably, wherein the apparatus further comprises: a waveform acquisition circuit comprising: a current sensor and a voltage sensor; wherein the content of the first and second substances,
the current sensor is connected in series in the pulse discharge loop, is connected with the waveform acquisition equipment, and is used for measuring a current signal of pulse discharge and outputting the current signal to the waveform acquisition equipment;
one end of the voltage sensor is respectively connected with the anode of the energy storage capacitor and one end of the test capacitor, and the other end of the voltage sensor is connected with the waveform acquisition equipment, and the voltage sensor is used for measuring the voltage signal shape of pulse discharge and outputting a voltage signal to the waveform acquisition equipment;
preferably, wherein the current sensor is a rogowski coil; the voltage sensor is a high-voltage probe.
The utility model provides a device for confirming direct current supports capacitor case and is able to bear or endure explosion the performance, the device includes: a dc tank circuit comprising: the direct current power supply is used for charging the energy storage capacitor, so that energy is stored in the energy storage capacitor, and the energy storage capacitor is used as a loop power supply of a pulse discharge loop; a pulsed discharge circuit comprising: the adjustable inductor and the test capacitor are connected in series with the energy storage capacitor after being connected in series; the energy storage capacitor injects the internally stored energy into the test capacitor through pulse discharge so as to carry out explosion resistance test on the test capacitor; the direct current power supply is a controllable constant current charging power supply. The utility model discloses a device is applicable to the direct current and supports the condenser, can ensure guarantee testing personnel's personal safety, can improve test efficiency, can realize the high-efficient explosion-proof performance who accurately confirms the condenser.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings:
fig. 1 is a schematic structural diagram of an apparatus 100 for determining explosion-proof performance of a dc support capacitor case according to an embodiment of the present invention;
fig. 2 is an illustration of an apparatus for determining the explosion-proof performance of a dc support capacitor case according to an embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of fully and completely disclosing the present invention and fully communicating the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same unit/element is denoted by the same reference numeral.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a schematic structural diagram of an apparatus 100 for determining explosion-proof performance of a dc support capacitor case according to an embodiment of the present invention. As shown in fig. 1, the utility model provides a device for confirming direct current supports capacitor case and is able to bear or endure explosion performance can ensure guarantee testing personnel's personal safety, can improve test efficiency, can realize the high-efficient explosion performance who accurately confirms the condenser. The utility model discloses embodiment provides a device 100 for confirming direct current supports capacitor case explosion-proof ability, include: a dc energy storage loop 101 and a pulse discharge loop 102 connected.
Preferably, the dc energy storage circuit 101 includes: the direct current power supply is used for charging the energy storage capacitor, so that energy is stored in the energy storage capacitor, and the energy storage capacitor is used as a loop power supply of a pulse discharge loop; the direct current power supply is a controllable constant current charging power supply.
Preferably, the pulse discharge circuit 102 includes: the adjustable inductor and the test capacitor are connected in series with the energy storage capacitor after being connected in series; the energy storage capacitor injects the internally stored energy into the sample capacitor through pulse discharge so as to carry out explosion resistance test on the sample capacitor.
The utility model discloses an among the embodiment, test circuit comprises direct current energy storage part and pulse discharge part, can be according to the operating mode of sample condenser, inside the blasting energy injection sample condenser that will correspond. Therefore, the extreme condition that the internal metallic short circuit occurs when the direct current support capacitor product actually runs is simulated. And the explosion-proof performance of the capacitor shell is examined according to the test result.
Specifically, the positive pole of the direct current power supply is connected with the positive pole of the energy storage capacitor, the negative pole of the direct current power supply is connected with the negative pole of the energy storage capacitor and grounded, the positive pole of the energy storage capacitor is connected with one end of the test article capacitor, the positive pole of the energy storage capacitor is further connected with one end of the adjustable inductor, and the other end of the adjustable inductor is connected with the other end of the test article capacitor. The direct-current power supply is used for charging the energy storage capacitor, so that energy is stored in the energy storage capacitor, and the energy storage capacitor is used as a loop power supply of the pulse discharge loop; the energy storage capacitor injects the internally stored energy into the test capacitor through pulse discharge so as to carry out an explosion resistance test on the test capacitor.
Preferably, the dc energy storage circuit further includes: one end of the charging switch is connected with the positive electrode of the direct current power supply, the other end of the charging switch is connected with the positive electrode of the energy storage capacitor, and the negative electrode of the direct current power supply is connected with the negative electrode of the energy storage capacitor and grounded; and controlling the direct-current power supply to charge the energy storage capacitor by turning on the charging switch, wherein the charging energy stored by the energy storage capacitor is the energy of the sample capacitor under the rated voltage.
Preferably, the dc energy storage circuit further includes: the energy leakage circuit comprises an energy leakage switch, an energy leakage resistor and a control circuit, wherein one end of the energy leakage switch is respectively connected with the positive electrode of a direct-current power supply and the positive electrode of an energy storage capacitor, the other end of the energy leakage switch is connected with one end of the energy leakage resistor, and the other end of the energy leakage resistor is connected with a ground wire; and controlling the energy stored in the energy storage capacitor to be released through the energy release resistor by switching on the energy release switch.
Preferably, the dc energy storage circuit further includes: and the high-precision voltmeter is used for acquiring voltage data at two ends of the energy storage capacitor and returning the voltage data to the direct current power supply so that the direct current power supply controls whether to charge the energy storage capacitor according to the voltage data.
Preferably, the dc power supply is a controllable constant current charging power supply, and is configured to control the power supply to start working according to a preset target charging voltage until the dc power supply automatically stops charging after reaching the target voltage.
Referring to fig. 2, in an embodiment of the present invention, the dc energy storage circuit includes: DC power supply DC, energy storage capacitor C 1 Charging switch K 1 Energy release switch K 2 And an energy discharge resistor R 1 (ii) a The direct-current energy storage loop can realize the charging and discharging functions of the energy storage capacitor. The direct-current power supply positive pole is connected with one end of a charging switch, the other end of the charging switch is connected with the positive pole of an energy storage capacitor, the negative pole of the energy storage capacitor is connected with the negative pole of the direct-current power supply, the negative pole of the energy storage capacitor and the negative pole of the direct-current power supply are both connected with the ground wire, meanwhile, the positive pole of the energy storage capacitor is connected with one end of an energy discharging switch, and the other end of the energy discharging switch is connected with an energy discharging resistor and connected to the ground wire.
In the embodiment of the utility model, when the tester connects the test loop, the charging switch is required to be disconnected, and the direct current power supply can not work; when the charging switch is switched on, the direct-current power supply is allowed to charge the energy storage capacitor, the energy storage capacitor stores energy, and the charging energy stored by the energy storage capacitor is the energy of the test sample under the rated voltage.
The utility model discloses an among the embodiment, when letting out the ability switch and switch on, the energy accessible that energy storage capacitor inside was stored lets out ability resistance and releases.
In an embodiment of the present invention, the dc power source is connected in series with the energy storage capacitor in the dc energy storage circuit. And controlling whether the direct current power supply charges the energy storage capacitor according to the reading of a voltmeter connected with the two ends of the energy storage capacitor so as to control the energy stored in the energy storage capacitor. When the whole test loop breaks down or is in an abnormal condition, the energy release switch is switched on, and the stored energy in the energy storage capacitor is released through the energy release resistor, so that the safety of testers is guaranteed.
The present invention provides an embodiment, wherein, in the test circuit, the charging switch in the dc energy storage circuit and the pulse discharging switch in the pulse discharging circuit are not turned on at the same time. The energy injected into the test sample can be controlled by adjusting the internal stored energy of the energy storage capacitor so as to meet the test requirements of different products.
The utility model discloses an in the embodiment, DC power supply adopts controllable constant current charging source, sets up the target charging voltage before charging after, and control source begins work. The direct current power supply automatically stops charging after reaching the target voltage. A high-precision voltmeter V is arranged in the direct-current energy storage loop 1 And two ends of the energy storage capacitor are connected with a high-precision voltmeter. The high-precision voltmeter measurement value is returned to the direct current power supply.
Preferably, the pulse discharge circuit further comprises: a pulse discharge switch and a short circuit switch; wherein the content of the first and second substances,
one end of the pulse discharge switch is connected with the anode of the energy storage capacitor, the other end of the pulse discharge switch is connected with one end of the test article capacitor, one end of the adjustable inductor is respectively connected with the cathode of the energy storage capacitor and the ground, and the other end of the adjustable inductor is connected with the other end of the test article capacitor; controlling the energy storage capacitor to inject the internally stored energy into the sample capacitor by turning on the pulse discharge switch;
the short circuit switch is connected with the test sample capacitor in parallel, and two ends of the test sample capacitor are in short circuit through the short circuit switch so as to carry out loop discharge.
Preferably, wherein the shorting switch incorporates a resistive copper conductor.
Preferably, the pulsed discharge switch comprises: the trigger copper needle is arranged above the tungsten copper electrode; when energy needs to be injected into the test capacitor, the copper needle above the tungsten copper electrode is controlled to fall off, the gap between the electrodes is reduced, and a discharge loop is formed, so that the energy stored in the energy storage capacitor is injected into the test capacitor.
As shown in FIG. 2, the present inventionIn a novel embodiment, the pulsed discharge circuit comprises: pulse discharge switch K 3 Capacitor C for test article 2 Large capacity adjustable inductor L 0 And a short-circuit switch K 4 (ii) a The pulse discharging circuit can release the energy stored in the energy storage capacitor to the sample capacitor. The pulse discharge loop uses an energy storage capacitor as a loop power supply, the positive pole of the energy storage capacitor is connected with the high-voltage end of a pulse discharge switch, the low-voltage end of the pulse discharge switch is connected with the positive pole of a test article capacitor, the negative pole of the test article capacitor is connected with one end of a high-capacity adjustable inductor, and meanwhile, two ends of the test article capacitor are connected with a short-circuit switch. The other end of the large-capacity adjustable inductor is connected with the negative electrode of the energy storage capacitor and the ground wire.
The utility model discloses an among the embodiment, in the pulse discharge return circuit, can carry out the return circuit and discharge with sample condenser both ends short circuit through short circuit switch. The short switch resistance is negligible compared to the loop resistance.
In the embodiment of the present invention, in the pulse discharge circuit, the pulse discharge switch is composed of a tungsten copper electrode and a trigger copper needle, and the trigger copper needle is disposed above the tungsten copper electrode. When energy needs to be injected into the test article capacitor, the copper needle above the tungsten copper electrode is controlled to fall off, the gap between the electrodes is reduced, a discharge loop is formed, and the energy is stored in the energy storage capacitor and injected into the test article capacitor.
The utility model discloses an among the embodiment, the inductance value of the adjustable inductance of large capacity calculates according to energy storage capacitor electric capacity size and selects to guarantee that the waveform that discharges satisfies the experimental requirement.
Preferably, wherein the apparatus further comprises: a waveform acquisition circuit comprising: a current sensor and a voltage sensor; wherein the content of the first and second substances,
the current sensor is connected in series in the pulse discharge loop, is connected with the waveform acquisition equipment, and is used for measuring a current signal of pulse discharge and outputting the current signal to the waveform acquisition equipment;
one end of the voltage sensor is respectively connected with the anode of the energy storage capacitor and one end of the test capacitor, and the other end of the voltage sensor is connected with the waveform acquisition equipment and used for measuring the voltage signal shape of pulse discharge and outputting a voltage signal to the waveform acquisition equipment.
Preferably, wherein the current sensor is a rogowski coil; the voltage sensor is a high-voltage probe.
With reference to fig. 2, in an embodiment of the present invention, the apparatus further includes: current sensor A and voltage sensor V 2 And high-precision oscilloscope S 1 . Wherein, a current sensor A and a voltage sensor V are arranged between the pulse discharge switch and the anode of the sample capacitor 2 The current sensor and the voltage sensor are both introduced into the waveform acquisition device, the current sensor acquires pulse discharge current waveforms, and the voltage sensor acquires pulse discharge voltage waveforms. The voltage sensor here may be a high voltage probe and the current sensor may be a rogowski coil.
Utilize the utility model discloses the device that embodiment passes through examines the method of direct current support capacitor case explosion-proof performance, and concrete step is as follows:
1. and selecting loop equipment meeting the test requirements.
Determining the capacitance C of the capacitor before testing 0 Rated voltage U 0 Thereby the rated explosion energy W of the test capacitor 0 Can be expressed as:
the energy storage capacitor parameter requirements are as follows: the charging voltage range is (1.1-1.5) times of U 0 . The energy stored in the energy storage capacitor should not exceed 1.1U at the charging voltage 0 Then the rated explosion energy W of the sample capacitor is reached 0 . The storage capacitor parameters meeting the requirements are selected according to the calculation.
The ratio of adjacent peak values of the reference discharge waveform of the test loop is greater than or equal to a preset ratio of 0.8, and the oscillation frequency of the reference discharge waveform is greater than or equal to a preset frequency threshold of 400Hz. And calculating the inductance value of the high-capacity adjustable inductor according to the capacity of the energy storage capacitor so as to enable the discharge waveform to meet the test requirement.
2. Preparing a special capacitor for testing the explosion-proof performance of the DC support capacitor shell.
And presetting an interelectrode metallic short-circuit capacitor element at the position 1/3 of the height from the center of the test sample to the top, wherein the short-circuit fault element is in short circuit by adopting a normal soft copper bar of the capacitor, the length of the copper bar is determined according to the capacitor element, and the impedance of the short-circuit copper bar is more than or equal to 0.1m omega. Besides the short-circuit capacitor element, the structure, material and process of the test article should be prepared according to the normal production of the product.
3. And (4) building a test loop according to the test circuit diagram, wherein the tested capacitor needs to be fixed, and the tested capacitor is prevented from moving in the test process. In order to reduce the loop resistance, the structure of the pulse discharge loop should be as compact and as short as possible. The pulse discharge loop and the test article are connected by adopting a soft copper wire, so that the influence of the electrodynamic force on the shell of the capacitor is reduced, and the electrical parameters of each energy storage capacitor are kept consistent.
4. A small-resistance copper conductor is connected to the over-short switches connected in parallel to the two ends of the test capacitor to form a loop, the resistance of the copper conductor needs to be as small as possible and can be ignored compared with the equivalent resistance of the test loop, and therefore the test capacitor is short-circuited. According to the rated explosion energy W of the capacitor of the sample 0 And calculating the charging voltage of the energy storage capacitor. The energy storage capacitor is charged through the direct current power supply, and the direct current power supply is disconnected after the preset voltage is reached. And discharging by using the pulse discharge switch, discharging the energy stored in the energy storage capacitor through an external short-circuit conductor, and recording a standard discharge waveform. After the reference discharge waveform is recorded, the energy release switch is switched on, and the safety of workers is ensured.
5. Calculating the equivalent series damping resistance R of the loop according to the waveform of the reference discharge current 0 。
Wherein the reference discharge current has a waveform of i 1 (t) charging energy W c1 Equivalent series damping resistance R of loop 0 Then:
6. and after the test loop is not electrified any more, the short-circuit switch is switched off, so that the tested capacitor is connected into the test loop. The energy storage capacitor is charged through the direct current power supply, and the direct current power supply is disconnected after the preset voltage is reached. Injecting energy stored in the energy storage capacitor into the tested capacitor by using a pulse discharge switch, and recording a discharge waveform; after the discharge waveform is recorded, the energy release switch is switched on, and the safety of workers is ensured.
7. And calculating the energy successfully injected into the test sample according to the discharge waveform.
Wherein the charging energy is W c2 Discharge current i 2 (t), test article equivalent series damping resistance R x Capacitance C of the storage capacitor, residual voltage U of the storage capacitor r The energy storage capacitor participates in the charge energy W r Then:
then, the energy W of the injected sample i Comprises the following steps:
8. determining the energy W of the injected sample i Whether the rated blasting energy of the test sample capacitor is more than or equal to the rated blasting energy of the test sample capacitor is met or not; if yes, entering step 9 when the test meets the requirements; and if the energy of the injected test sample is less than the rated blasting energy of the test sample capacitor, replacing the test sample capacitor again, and starting to perform the test again from the step 5.
9. Checking whether the shell, the sleeve and other parts of the test capacitor burst after the test, and if not, the test capacitor passes the test; if a blow out occurs, the test capacitor is considered to fail.
Compare with current exchange power capacitor shell explosion-proof performance test circuit, the utility model discloses the test circuit that embodiment provided has following advantage:
1. the energy leakage branch circuit (comprising an energy leakage switch and an energy leakage resistor) is added in the test loop, and the energy leakage branch circuit is always connected in the personnel operation process, so that the personal safety of the test personnel is guaranteed.
2. And aiming at the structural characteristics of the direct current support capacitor, a corresponding fault presetting mode is provided. Fault capacitor element adopts the electric breakdown mode to be equipped with in the relevant standard, and direct current supports the condenser and is the self-healing condenser, is difficult to reach short circuit nature trouble through the electric breakdown mode, the utility model discloses well adoption soft copper bar short circuit's mode presets the fault point, the condition when can simulating the inside short circuit of direct current support capacitor.
3. The direct current support capacitor is large in capacity and large in stored energy, a constant current power supply is used for charging in a test loop, the charging speed is greatly improved, and the test efficiency is improved.
4. The direct current supports the condenser stored energy many, and when the sample pours into the energy into, loop current is big, and sphere gap discharge switch pulse discharge switch can't bear the electric power under the heavy current, the utility model discloses a trigger switch that the tungsten copper electrode was made, mechanical properties is good, can reduce the loop resistance simultaneously, improves energy injection efficiency.
5. And adding an adjustable capacitor to adjust the discharge parameters of the loop, so that the discharge waveform meets the test requirements. And a short-circuit switch is added, so that the reference discharge waveform is convenient to measure. The test efficiency is greatly improved.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the above disclosed are equally possible within the scope of the invention, as would be apparent to a person skilled in the art, as defined by the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
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.
This application is made with reference to methods, apparatus (systems) according to embodiments of the application and flowchart and/or block diagrams of computer program products. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as being covered by the claims.
Claims (9)
1. An apparatus for determining the explosion-proof capability of a dc support capacitor case, the apparatus comprising: the direct current energy storage loop and the pulse discharge loop are connected; wherein the content of the first and second substances,
the direct current energy storage loop comprises: the direct current power supply is used for charging the energy storage capacitor, so that energy is stored in the energy storage capacitor, and the energy storage capacitor is used as a loop power supply of a pulse discharge loop;
the pulse discharge circuit includes: the adjustable inductor and the test capacitor are connected in series with the energy storage capacitor after being connected in series; the energy storage capacitor injects the internally stored energy into the test capacitor through pulse discharge so as to carry out explosion resistance test on the test capacitor;
the direct current power supply is a controllable constant current charging power supply.
2. The apparatus of claim 1, wherein the dc tank circuit further comprises: one end of the charging switch is connected with the positive electrode of the direct current power supply, the other end of the charging switch is connected with the positive electrode of the energy storage capacitor, and the negative electrode of the direct current power supply is connected with the negative electrode of the energy storage capacitor and grounded; and controlling the direct-current power supply to charge the energy storage capacitor by turning on the charging switch, wherein the charging energy stored by the energy storage capacitor is the energy of the sample capacitor under the rated voltage.
3. The apparatus of claim 1, wherein the dc tank circuit further comprises: the energy release device comprises an energy release switch and an energy release resistor, wherein one end of the energy release switch is respectively connected with the positive electrode of a direct-current power supply and the positive electrode of an energy storage capacitor, the other end of the energy release switch is connected with one end of the energy release resistor, and the other end of the energy release resistor is connected with a ground wire; and controlling the energy stored in the energy storage capacitor to be released through the energy release resistor by switching on the energy release switch.
4. The apparatus of claim 1, wherein the dc tank circuit further comprises: and the high-precision voltmeter is used for acquiring voltage data at two ends of the energy storage capacitor and returning the voltage data to the direct current power supply so that the direct current power supply controls whether to charge the energy storage capacitor according to the voltage data.
5. The apparatus of claim 1, wherein the pulsed discharge circuit further comprises: a pulse discharge switch and a short circuit switch; wherein, the first and the second end of the pipe are connected with each other,
one end of the pulse discharge switch is connected with the anode of the energy storage capacitor, the other end of the pulse discharge switch is connected with one end of the test article capacitor, one end of the adjustable inductor is respectively connected with the cathode of the energy storage capacitor and the ground, and the other end of the adjustable inductor is connected with the other end of the test article capacitor; controlling the energy storage capacitor to inject the internally stored energy into the test capacitor by turning on the pulse discharge switch;
the short circuit switch is connected with the test capacitor in parallel, and two ends of the test capacitor are in short circuit through the short circuit switch so as to perform loop discharge.
6. The device of claim 5, wherein the shorting switch has a resistive copper conductor built into it.
7. The apparatus of claim 5, wherein the pulsed discharge switch comprises: the trigger copper needle is arranged above the tungsten copper electrode; when energy needs to be injected into the test article capacitor, the copper needle above the tungsten copper electrode is controlled to fall off, the gap between the electrodes is reduced to form a discharge loop, so that the energy stored in the energy storage capacitor is injected into the capacitance of the test sample.
8. The apparatus of claim 1, further comprising: a waveform acquisition circuit comprising: a current sensor and a voltage sensor; wherein the content of the first and second substances,
the current sensor is connected in series in the pulse discharge loop, is connected with the waveform acquisition equipment, and is used for measuring a current signal of pulse discharge and outputting the current signal to the waveform acquisition equipment;
one end of the voltage sensor is respectively connected with the anode of the energy storage capacitor and one end of the test capacitor, and the other end of the voltage sensor is connected with the waveform acquisition equipment and used for measuring the voltage signal shape of pulse discharge and outputting a voltage signal to the waveform acquisition equipment.
9. The device of claim 8, wherein the current sensor is a rogowski coil; the voltage sensor is a high-voltage probe.
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| CN115598446A (en) * | 2022-10-25 | 2023-01-13 | 国网经济技术研究院有限公司（Cn） | Movable high-capacity high-voltage capacitor parameter detection device and use method |
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| CN115598446A (en) * | 2022-10-25 | 2023-01-13 | 国网经济技术研究院有限公司（Cn） | Movable high-capacity high-voltage capacitor parameter detection device and use method |
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