CN113804931B - Oscillating wave voltage generation system, oscillating wave voltage generation method, oscillating wave voltage generation device, oscillating wave voltage generation equipment and storage medium - Google Patents
Oscillating wave voltage generation system, oscillating wave voltage generation method, oscillating wave voltage generation device, oscillating wave voltage generation equipment and storage medium Download PDFInfo
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- CN113804931B CN113804931B CN202110930097.6A CN202110930097A CN113804931B CN 113804931 B CN113804931 B CN 113804931B CN 202110930097 A CN202110930097 A CN 202110930097A CN 113804931 B CN113804931 B CN 113804931B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Abstract
The invention relates to an oscillatory wave voltage generation system, an oscillatory wave voltage generation method, an oscillatory wave voltage generation device, an oscillatory wave voltage generation equipment and a storage medium. The energy storage module of the oscillating wave voltage generation system is used for being connected with the element to be tested in parallel; the power supply module is used for charging the energy storage module and the element to be tested; the reactor module is used for forming a first oscillating circuit with the energy storage module and the element to be tested and forming a second oscillating circuit with the element to be tested, and in the first oscillating circuit, the electric energy of the energy storage module and the element to be tested is converted into the magnetic field energy of the reactor module; the switch module comprises a first switch unit and a second switch unit, wherein the first switch unit is used for switching on or off the first connection path, and the second switch unit is used for switching on or off the second connection path. The vibration wave voltage generation system can avoid the damage of the element to be tested in the insulation detection direct current charging process.
Description
Technical Field
The present invention relates to the field of insulation detection technology, and in particular, to an oscillating wave voltage generating system, an oscillating wave voltage generating method, an oscillating wave voltage generating device, an oscillating wave voltage generating apparatus, an oscillating wave voltage generating device, and a storage medium.
Background
The cable transformation process of overhead lines in China is continuously accelerated, the cable becomes an important component part in a power transmission network, various insulation defects and insulation degradation phenomena can occur in the period of the cable being put into operation, and further the power transmission system is caused to be faulty, so that power failure accidents are caused. And the method has important significance in comprehensively and accurately detecting and evaluating the insulation state of the cable. At present, when detecting the insulation state of a cable, an oscillatory wave technology is often used for detecting the insulation of the cable.
In the oscillatory wave technology, a high-voltage direct-current power supply is used for charging a tested cable to a voltage required by a test, and the oscillatory wave voltage is generated through discharging of a resonant reactor and is used for evaluating the insulation state of the cable.
However, in the conventional oscillatory wave detection technique, there is a problem that the cable is damaged when the cable is subjected to insulation detection.
Disclosure of Invention
In view of the foregoing, it is desirable to provide an oscillatory wave voltage generating system, method, apparatus, device, and storage medium that can avoid directly charging a cable under test to a voltage required for a test using a direct current power supply.
An oscillatory wave voltage generation system comprising:
the energy storage module is used for being connected with the element to be tested in parallel;
the power supply module is respectively connected with the energy storage module and the element to be tested in parallel and is used for charging the energy storage module and the element to be tested;
the reactor module is connected in parallel with the energy storage module and is used for forming a first oscillation loop with the energy storage module and the element to be tested and forming a second oscillation loop with the element to be tested, wherein in the first oscillation loop, electric energy of the energy storage module and the element to be tested is converted into magnetic field energy of the reactor module, and in the second oscillation loop, LC oscillation is generated between the reactor module and the element to be tested so that the element to be tested generates oscillating wave voltage;
the switch module comprises a first switch unit and a second switch unit, the first switch unit is arranged in a first connecting passage of the energy storage module and the element to be tested and used for switching on or off the first connecting passage, and the second switch unit is arranged in a second connecting passage of the reactor module and the element to be tested and used for switching on or off the second connecting passage;
when the first switch unit is turned on, the reactor module, the energy storage module and the element to be tested form a first oscillation circuit, and when the first switch unit is turned off and the second switch unit is turned on, the reactor module and the element to be tested form a second oscillation circuit.
In one embodiment, the power supply module includes:
the power supply unit is used for outputting direct-current voltage;
the first end of the protection resistor is connected with the first end of the power supply unit, the second end of the protection resistor is the output end of the power supply module, and the second end of the protection resistor is respectively connected with the first switch unit and the first end of the energy storage module and used for protecting the power supply unit.
In one embodiment, the first switch unit includes a single-pole single-throw switch, a first end of the single-pole single-throw switch of the first switch unit is connected with the first end of the energy storage module and the output end of the power supply module, and a second end of the single-pole single-throw switch of the first switch unit is connected with the first end of the reactor module and the first end of the element to be tested;
the second switch unit comprises a single-pole single-throw switch, a first end of the single-pole single-throw switch of the second switch unit is connected with a second end of the reactor module, and a second end of the single-pole single-throw switch of the second switch unit is grounded.
In one embodiment, the method further comprises:
the first end of the measuring module is connected with the first end of the element to be measured, and the second end of the measuring module is grounded; the measuring module is used for acquiring and sending the voltage signal of the element to be measured.
In one embodiment, the method further comprises:
the control module is respectively connected with the signal input end of the first switch unit, the signal input end of the second switch unit and the signal output end of the measuring module, and is used for receiving the voltage signal sent by the measuring module, sending a first signal to the first switch unit according to the voltage signal and sending a second signal to the second switch unit according to the voltage signal, wherein the first signal is used for controlling the first switch unit to be turned on or turned off, and the second signal is used for controlling the second switch unit to be turned on or turned off.
An oscillating wave voltage generating method applied to the above oscillating wave voltage generating system, the method comprising:
when the charging voltage at two ends of the element to be detected is detected to reach a preset voltage, the first switch unit and the second switch unit are controlled to be conducted;
and in the first oscillation circuit, when the voltage of the element to be detected is detected to be zero, the first switch unit is controlled to be turned off.
In one embodiment, before the controlling the first switch unit and the second switch unit to be turned on when the charging voltage across the element to be tested is detected to reach a preset voltage, the method includes:
and controlling the first switch unit to be conducted and controlling the second switch unit to be disconnected so as to enable the element to be tested to be charged.
An oscillatory wave voltage generation control device comprising:
the first control module is used for controlling the first switch unit and the second switch unit to be conducted when detecting that the charging voltage at two ends of the element to be detected reaches a preset voltage;
and the second control module is used for controlling the first switch unit to be turned off when the voltage of the element to be detected is detected to be zero in the first oscillation loop.
A computer device comprising a memory storing a computer program and a processor implementing the steps of the method described above when the processor executes the computer program.
A computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.
In the first oscillation loop, the electric energy on the energy storage unit and the element to be measured is converted into the magnetic field energy on the reactor module, when the electric energy on the energy storage unit and the element to be measured is completely converted, namely, the voltage of the element to be measured is zero, the second oscillation loop is entered, the magnetic field energy and the electric energy are converted back and forth on the reactor module and the element to be measured, at the moment, because the energy storage unit does not participate in oscillation, the peak value of the voltage of the oscillation wave on the element to be measured is far greater than the voltage when the charging of the element to be measured is completed, and the voltage of the oscillation wave of the element to be measured meets the requirement of insulating detection of the voltage of the oscillation wave, the voltage to be measured at two ends of the element to be measured is the same as the voltage at two ends of the energy storage unit when the charging of the element to be measured is completed in the process, and the voltage to be measured is lower than the voltage provided by the traditional direct current high voltage power supply, the possibility of generating charge aggregation effect on the element to be measured is greatly reduced, and the element to be measured is prevented from being directly connected with the high voltage direct current power supply to damage the element to be measured.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings required for the descriptions of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of an oscillating wave voltage generating system according to an embodiment;
FIG. 2 is a schematic diagram of the power module in FIG. 1;
FIG. 3 is a schematic diagram of the switch module of FIG. 1;
FIG. 4 is a schematic diagram of an oscillating wave voltage generating system according to another embodiment;
FIG. 5 is a schematic diagram of an oscillating wave voltage generating system according to another embodiment;
FIG. 6 is a flow chart of an oscillating wave voltage generating method according to an embodiment;
FIG. 7 is a flow chart of an oscillating wave voltage generating method according to another embodiment;
FIG. 8 is a block diagram showing the structure of an oscillatory wave voltage generation control device in one embodiment;
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. Both the first resistor and the second resistor are resistors, but they are not the same resistor.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
As described in the background art, in the conventional oscillatory wave detection technology, there is a problem that a cable is damaged when the cable is insulated and detected, and the inventor has found that the problem occurs because a charge accumulation effect may exist in the cable when the cable is charged by a dc power supply, thereby damaging the cable.
In view of the above, the present invention provides an oscillatory wave voltage generation system, method, apparatus, device, and storage medium that can avoid directly charging a cable under test to a voltage required for a test using a direct current power supply.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an oscillating wave voltage generating system according to the present embodiment. In one embodiment, as shown in fig. 1, there is provided an oscillatory wave voltage generating system comprising: a power supply module 110, an energy storage module 120, a switching module 130, and a reactor module 140. Wherein:
the energy storage module 120 is used for being connected with the element 150 to be tested in parallel; the power supply module 110 is respectively connected in parallel with the energy storage module 120 and the element to be tested 150, and is used for charging the energy storage module 120 and the element to be tested 150; the reactor module 140 is connected in parallel with the energy storage module 120, and is configured to form a first tank circuit with the energy storage module 120 and the element to be tested 150, and form a second tank circuit with the element to be tested 150, where in the first tank circuit, electric energy of the energy storage module 120 and the element to be tested 150 is converted into magnetic field energy of the reactor module 140, and in the second tank circuit, the reactor module 140 and the element to be tested 150 generate LC oscillation, so that the element to be tested 150 generates an oscillating wave voltage; a switching module 130 including a first switching unit 1301 and a second switching unit 1302, the first switching unit 1301 being disposed in a first connection path of the energy storage module 120 and the element 150 to be measured to turn on or off the first connection path, the second switching unit 1302 being disposed in a second connection path of the reactor module 140 and the element 150 to be measured to turn on or off the second connection path; when the first switch unit 1301 is turned on and the second switch unit 1302 is turned off, the reactor module 140, the energy storage module 120 and the element to be measured 150 form a first tank circuit, and when the first switch unit 1301 is turned off and the second switch unit 1302 is turned on, the reactor module 140 and the element to be measured 150 form a second tank circuit.
In the present embodiment, the energy storage module 120 refers to a module capable of storing the electric energy of the power supply module 110 in the form of electric field energy. For example, the energy storage module 120 may include one or more capacitor units, which have a capacitive characteristic and store electric field energy. The capacitor unit includes one or more capacitors, and at least two capacitors are connected in parallel to improve the capability of the energy storage module 120 to store electric field energy, and a specific capacitor may be a capacitor with a withstand voltage not lower than 5kV and a capacitance not lower than 1 mF. The power supply module 110 is a module capable of outputting a dc voltage to the outside. For example, the power supply module 110 may be a dc voltage source with an adjustable voltage, and the power supply module 110 may also be a voltage conversion device, where the voltage conversion device is used to convert 220v ac voltage into dc voltage, and the dc voltage output by the voltage conversion device is adjustable. The reactor module 140 refers to a module including one or more inductance units having inductance characteristics, and the inductance units include one or more inductances, which can be selected according to actual needs. The switching module 130 refers to a module for connecting on or off circuit elements.
Specifically, the first switch unit 1301 of the switch module 130 is turned on and the second switch unit 1302 is turned off, and the power supply module 110 outputs a dc voltage to the energy storage module 120 and the element 150 to be tested, and the energy storage module 120 and the element 150 to be tested are charged dc; when the element 150 to be tested is charged to the preset voltage, the first switch unit 1301 of the switch module 130 is turned on and the second switch unit 1302 is turned on, and the energy storage module 120, the element 150 to be tested and the reactor module 140 form a first oscillating circuit, in which the electric field energy on the energy storage module 120 and the element 150 to be tested is converted into the magnetic field energy in the reactor module 140. When the electric field energy on the energy storage module 120 and the element to be measured 150 is zero, that is, the voltage of the element to be measured 150 is zero, the first switch unit 1301 of the switch module 130 is turned off and the second switch unit 1302 is turned on, the element to be measured 150 and the reactor module 140 form a second oscillating circuit, in which the element to be measured 150 and the reactor module 140 perform LC oscillation, and the magnetic field energy on the reactor module 140 in the first oscillating circuit is used as initial energy of LC oscillation in the second oscillating circuit, in which the voltage of the element to be measured 150 is the oscillating wave voltage.
It can be understood that the energy storage module 120 and the element to be tested 150 are charged by the power supply module 110, the power supply module 110 performs dc charging on the energy storage module 120 and the power supply module 110, and the energy storage module 120 and the element to be tested 150 are connected in parallel, so that the voltage on the element to be tested 150 is consistent with the voltage of the energy storage module 120, and the element to be tested 150 and the electric energy are stored in the energy storage module 120 and the element to be tested 150 in electric field energy. After the element to be tested 150 and the energy storage module 120 are charged, the element to be tested 150, the energy storage module 120 and the reactor module 140 form a first oscillating circuit, electric field energy on the element to be tested 150 and the energy storage module 120 is converted into magnetic field energy in the reactor module 140, the element to be tested 150 and the reactor module 140 form a second oscillating circuit, and the magnetic field energy of the reactor module 140 in the first oscillating circuit is used as initial energy of the second oscillating circuit LC oscillation. The voltage across the device under test 150 in the second tank circuit is an oscillatory wave voltage. The electric field energy on the element to be measured 150 and the energy storage module 120 is converted into the magnetic field energy of the reactor module 140, and the magnetic field energy is used as the initial energy for LC oscillation of the element to be measured 150 and the reactor module 140, so that the conventional technology is avoided by directly using the electric field energy on the element to be measured 150 as the initial energy for LC oscillation. Thereby reducing the charge accumulation effect that occurs on the device under test 150 and thus avoiding damage to the cable.
In one embodiment, as shown in fig. 2, the power supply module 110 includes: a power supply unit 1201 and a protection resistor R1. Wherein the power supply unit 1201 is configured to output a dc voltage; the first end of the protection resistor R1 is connected to the first end of the power supply unit 1201, the second end of the protection resistor R1 is an output end of the power supply module 110, and the second end of the protection resistor R1 is respectively connected to the first switch unit and the first end of the energy storage module, so as to protect the power supply unit 1201.
The power supply unit 1201 is a unit capable of outputting a dc voltage, and the output dc voltage may be specifically a dc voltage, for example, the power supply unit 1201 includes a rectifying circuit and a voltage regulating circuit, and 220v,60hz ac voltage is input into the power supply unit 1201, and the 0-5kV adjustable dc voltage is obtained through conversion of the rectifying circuit and the voltage regulating circuit. The voltage regulating circuit receives external signal input and regulates the output voltage through the external signal. The protection resistor R1 refers to a resistor for overvoltage protection, and the protection resistor R1 may be a resistor having a resistance value of 10mΩ and a power of 100W, for example.
It should be noted that, the power supply module 110 includes a power supply unit 1201 and a protection resistor R1, the power supply unit 1201 outputs a dc voltage to the outside, and the power supply unit 1201 outputs an adjustable dc voltage according to the following formula:
wherein U is dc For the dc voltage output by the power supply unit 1201, C is the capacitance value in the energy storage module, C cable Is the equivalent capacitance value of the element to be measured. The protection resistor prevents the power supply unit 1201 from being directly grounded, resulting in a short-circuit current damaging the power supply unit 1201.
It can be understood that the power supply module 110 includes a power supply unit 1201 and a protection resistor R1, where the power supply unit 1201 is overvoltage-protected by the protection resistor R1 by converting an external ac voltage into an output-adjustable dc voltage through the power supply unit 1201.
In one embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of the switch module 130, where the reference numerals of the power supply module, the energy storage module, the reactor module, and the element to be tested continue to the corresponding reference numerals in fig. 1. The first switch unit includes a single pole single throw switch 1301, a first end of the single pole single throw switch 1301 of the first switch unit is connected with a first end of the energy storage module 120 and an output end of the power supply module 110, and a second end of the single pole single throw switch 1301 of the first switch unit is connected with a first end of the reactor module 140 and a first end of the element to be tested 150; the second switch unit includes a single pole single throw switch 1302, a first end of the single pole single throw switch 1302 of the second switch unit is connected to a second end of the reactor module 140, and a second end of the single pole single throw switch 1302 of the second switch unit is grounded.
The first switch unit refers to a unit that functions as a switch, and may include a single-pole single-throw switch, and the first switch unit further includes a driving circuit 1303 of the single-pole single-throw switch, where the driving circuit 1303 is configured to drive on/off of the single-pole single-throw switch 1301, and the driving circuit 1303 receives an input control signal to control on/off of the single-pole single-throw switch. The first switch unit may be integrated with a plurality of solid-state switches, the specific solid-state switch may be a semiconductor contactless switch, the semiconductor contactless switch may control on and off of the switch through an external signal, the rated voltage of the semiconductor contactless switch may be 200kV, and the rated current may be 200A. The second switch unit is similar to the first switch unit and will not be described again.
Specifically, when the driving circuit 1303 receives a control signal to control the single-pole single-throw switch 1301 of the first switch unit to be closed and the element to be tested 150 and the energy storage module 120 form a path, and when the driving circuit 1303 receives a control signal to control the single-pole single-throw switch 1301 of the first switch unit and the single-pole single-throw switch 1302 of the second switch unit to be turned on, the second end of the reactor module 140 is grounded, the reactor module 140 is communicated with the energy storage module 120 and the element to be tested 150, and the driving circuit 1303 receives a control signal to control the single-pole single-throw switch 1301 of the first switch unit to be turned off and the single-pole single-throw switch 1302 of the second switch unit to be turned on, the reactor module 140 is communicated with the element to be tested 150.
It will be appreciated that in the conventional art, there is a possibility that the device under test may be damaged by charging the device under test to the electric field energy required for oscillation at a high voltage. The technical solution of the present embodiment changes the connection relationship of the element 150 to be tested, the energy storage module 120 and the reactor module 140 by controlling the on and off of the single pole single throw switch 1301 of the first switch unit and the single pole single throw switch 1302 of the second switch unit; thereby, the energy storage module 120 and the element to be measured 150 store electric field energy, wherein the stored electric field energy oscillates in the element to be measured 150 and the reactor module 140, and the oscillation in the element to be measured 150 and the reactor module 140 only by the electric field energy in the element to be measured in the conventional technology is avoided.
In this embodiment, the on and off of the single pole single throw switch 1301 of the first switch unit and the single pole single throw switch 1302 of the second switch unit are changed, and the voltage signal across the element to be measured needs to be obtained.
In one embodiment, as shown in fig. 4, the reference numerals of the power supply module, the energy storage module, the switching module, the first switching unit, the second switching unit, the reactor module, and the element to be measured in fig. 4 are continued with those of fig. 1. The oscillatory wave voltage generation system further includes: a measurement module 160, wherein a first end of the measurement module 160 is connected to a first end of the element to be measured 150, and a second end of the measurement module 160 is grounded; the measurement module 160 is configured to acquire and send a voltage signal of the device under test.
The measurement module 160 is a module for detecting and transmitting voltage signals at two ends of the element 150 to be measured, and the measurement module 160 includes a capacitive voltage divider and a transmission module, wherein the capacitive voltage divider is used for measuring voltage, the partial discharge capacity of the capacitive voltage divider is less than 5pC under the action of sinusoidal voltage with a peak value of 180kV, and the transformation ratio of the capacitive voltage divider can be 10000:1. The sending module is used for sending the voltage waveform acquired by the capacitive voltage divider.
Specifically, the measurement module 160 detects and sends voltage signals at two ends of the element to be measured, the capacitive voltage divider obtains the voltage signals at two ends of the element to be measured, the specific voltage signals may be obtained voltage waveforms of the element to be measured, and the sending module sends the voltage signals detected by the capacitive voltage divider.
It can be appreciated that the voltage of the element to be measured is detected by the measuring module 160, so as to monitor the voltage of the element to be measured 150, and the first switch unit and the second switch unit are further processed according to the obtained voltage.
In one embodiment, the reactor module of the oscillating wave voltage generating system refers to a module with inductance characteristic capable of LC oscillation, and the reactor module may be a plurality of resonant inductors, and the resonant reactor adopts an air-core reactor structure, the inductance value is not less than 10H, the direct current resistance value is not more than 50Ω, and the local discharge capacity is less than 5pC under the action of a sinusoidal voltage with a peak value of 180 kV. It can be understood that when the energy storage module, the element to be tested and the resonant reactor form the first oscillation loop, the energy storage module and the element to be tested generate large current in a mode of discharging the resonant reactor, so that the use of a high-power current source is avoided.
In one embodiment, as shown in fig. 5, the oscillatory wave voltage generation system further comprises: the control module 170 is respectively connected with the signal input end of the first switch unit, the signal input end of the second switch unit and the signal output end of the measurement module, the control module 170 is used for receiving the voltage signal sent by the measurement module, sending a first signal to the first switch unit according to the voltage signal and sending a second signal to the second switch unit according to the voltage signal, the first signal is used for controlling the first switch unit to be turned on or turned off, and the second signal is used for controlling the second switch unit to be turned on or turned off.
The control module 170 may receive the voltage signal and generate a control signal according to the voltage signal. The control module 170 may be a computer device, the control module 170 receives the voltage signal sent by the detection module, the control module 170 may display a voltage waveform of the voltage signal, and send a control signal to the signal input end of the first switch unit and the signal input end of the second switch unit according to the voltage signal, so as to control the single pole single throw switch of the first switch unit and the single pole single throw switch of the second switch unit to be turned on or off. The control signals are transmitted by wireless communication technology. In addition, the control module 170 can also send a control signal to control the magnitude of the power module output voltage.
It should be noted that, the control module 170 sends a first control signal to the single-pole single-throw switch of the first switch unit to control the on or off of the single-pole single-throw switch of the first switch unit, the control module 170 sends a first control signal to the single-pole single-throw switch of the second switch unit to control the on or off of the single-pole single-throw switch of the second switch unit, and the control module 170 sends a third control signal to the power supply module to control the magnitude of the output voltage of the power supply module.
It can be understood that the control module 170 obtains the voltage of the element to be tested, generates the first control signal according to the voltage to be tested to control the on and off of the single-pole single-throw switch of the first switch unit, and generates the second control signal according to the voltage to be tested to control the on and off of the single-pole single-throw switch of the second switch unit. The single pole single throw switch of the first switch unit and the single pole single throw switch of the second switch unit are controlled more accurately.
In one embodiment, as shown in fig. 6, there is provided a method of oscillating wave voltage generation, the method comprising:
and step 210, when the charging voltage at two ends of the element to be tested is detected to reach a preset voltage, controlling the first switch unit and the second switch unit to be conducted.
The preset voltage refers to a voltage when the charging of the device under test is completed, for example, after the charging of the device under test is completed, the voltage at two ends of the device under test is the preset voltage. When the first switch unit and the second switch unit are controlled to be conducted, the element to be tested, the energy storage module and the reactor module form a first oscillation loop, and in the first oscillation loop, electric field energy on the element to be tested and the energy storage module is converted into magnetic field energy of the reactor module, and at the moment, the voltage in the element to be tested is reduced.
And 220, in the first oscillation circuit, when the voltage of the element to be detected is detected to be zero, controlling the first switch unit to be turned off.
When the measuring module detects that the voltage of the element to be measured in the first oscillating circuit is zero, the control module sends a first control signal to the first switch unit to turn off the first switch unit, so that the energy storage module is cut off, the element to be measured and the reactor module form a second oscillating circuit, at the moment, the magnetic field in the reactor module can be used as initial oscillating energy, and the voltage at two ends of the element to be measured is oscillating wave voltage.
In one possible embodiment, as shown in fig. 7, before the step of controlling the first switch unit and the second switch unit to be turned on when the charging voltage across the element to be tested is detected to reach a preset voltage, the step of:
step 230, controlling the first switch unit to be turned on and controlling the second switch unit to be turned off so as to charge the device under test. In this embodiment, the control module controls the first switch unit to be turned on and controls the second switch unit to be turned off, and the power supply module charges the energy storage module and the element to be tested.
It should be understood that, although the steps in the flowcharts of fig. 6 to 7 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps of fig. 6-7 may include multiple steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor does the order in which the steps or stages are performed necessarily occur sequentially, but may be performed alternately or alternately with other steps or at least a portion of the steps or stages in other steps.
In one embodiment, as shown in fig. 8, there is provided an oscillatory wave voltage generation control apparatus 300 comprising: a first control module 310 and a second control module 320. The first control module 310 is configured to control the first switch unit and the second switch unit to be turned on when detecting that the charging voltage at two ends of the element to be tested reaches a preset voltage; the second control module 320 is configured to control the first switch unit to be turned off when the voltage of the element to be tested is detected to be zero in the first tank circuit.
In one embodiment, the oscillating wave voltage generation control device further includes a third control module, where the third control module is configured to control the first switch unit to be turned on and the second switch unit to be turned off, so as to charge the element to be tested.
For specific limitations on the means for controlling the generation of the oscillating wave voltage, reference may be made to the above limitations on the method for detecting the status of the communication module, and no further description is given here. Each of the above-described means for detecting the status of the communication module may be implemented in whole or in part by software, hardware, or a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.
In one embodiment, a computer device is provided comprising a memory storing a computer program and a processor that when executing the computer program performs the steps of:
when the charging voltage at two ends of the element to be detected is detected to reach a preset voltage, the first switch unit and the second switch unit are controlled to be conducted; and in the first oscillation circuit, when the voltage of the element to be detected is detected to be zero, the first switch unit is controlled to be turned off.
In one embodiment, the processor when executing the computer program further performs the steps of:
before controlling the first switch unit and the second switch unit to be conducted when detecting that the charging voltage at two ends of the element to be tested reaches a preset voltage, the method comprises the following steps: and controlling the first switch unit to be conducted and controlling the second switch unit to be disconnected so as to enable the element to be tested to be charged.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
when the charging voltage at two ends of the element to be detected is detected to reach a preset voltage, the first switch unit and the second switch unit are controlled to be conducted; and in the first oscillation circuit, when the voltage of the element to be detected is detected to be zero, the first switch unit is controlled to be turned off.
In one embodiment, the computer program when executed by the processor further performs the steps of:
before controlling the first switch unit and the second switch unit to be conducted when detecting that the charging voltage at two ends of the element to be tested reaches a preset voltage, the method comprises the following steps: and controlling the first switch unit to be conducted and controlling the second switch unit to be disconnected so as to enable the element to be tested to be charged.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like.
In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "desired embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. An oscillatory wave voltage generation system, comprising:
the energy storage module is used for being connected with the element to be tested in parallel;
the power supply module is respectively connected with the energy storage module and the element to be tested in parallel and is used for charging the energy storage module and the element to be tested;
the reactor module is connected in parallel with the energy storage module and is used for forming a first oscillation loop with the energy storage module and the element to be tested and forming a second oscillation loop with the element to be tested, wherein in the first oscillation loop, electric energy of the energy storage module and the element to be tested is converted into magnetic field energy of the reactor module, and in the second oscillation loop, LC oscillation is generated between the reactor module and the element to be tested so that the element to be tested generates oscillating wave voltage;
the switch module comprises a first switch unit and a second switch unit, the first switch unit is arranged in a first connecting passage of the energy storage module and the element to be tested and used for switching on or off the first connecting passage, and the second switch unit is arranged in a second connecting passage of the reactor module and the element to be tested and used for switching on or off the second connecting passage;
when the first switch unit is turned on, the reactor module, the energy storage module and the element to be tested form a first oscillation circuit, and when the first switch unit is turned off and the second switch unit is turned on, the reactor module and the element to be tested form a second oscillation circuit.
2. The oscillatory wave voltage generation system of claim 1, wherein the power supply module comprises:
the power supply unit is used for outputting direct-current voltage;
the first end of the protection resistor is connected with the first end of the power supply unit, the second end of the protection resistor is the output end of the power supply module, and the second end of the protection resistor is respectively connected with the first switch unit and the first end of the energy storage module and used for protecting the power supply unit.
3. The oscillatory wave voltage generation system of claim 1, wherein the first switching unit comprises a single pole single throw switch, a first end of the single pole single throw switch of the first switching unit is connected with a first end of the energy storage module and an output end of the power supply module, respectively, and a second end of the single pole single throw switch of the first switching unit is connected with a first end of the reactor module and a first end of the element under test, respectively;
the second switch unit comprises a single-pole single-throw switch, a first end of the single-pole single-throw switch of the second switch unit is connected with a second end of the reactor module, and a second end of the single-pole single-throw switch of the second switch unit is grounded.
4. The oscillatory wave voltage generation system of claim 1, further comprising:
the first end of the measuring module is connected with the first end of the element to be measured, and the second end of the measuring module is grounded; the measuring module is used for acquiring and sending the voltage signal of the element to be measured.
5. The oscillatory wave voltage generation system of claim 4, further comprising:
the control module is respectively connected with the signal input end of the first switch unit, the signal input end of the second switch unit and the signal output end of the measuring module, and is used for receiving the voltage signal sent by the measuring module, sending a first signal to the first switch unit according to the voltage signal and sending a second signal to the second switch unit according to the voltage signal, wherein the first signal is used for controlling the first switch unit to be turned on or turned off, and the second signal is used for controlling the second switch unit to be turned on or turned off.
6. An oscillating wave voltage generating method, characterized in that the oscillating wave voltage generating method is applied to the oscillating wave voltage generating system according to any one of claims 1 to 5, the method comprising:
when the charging voltage at two ends of the element to be detected is detected to reach a preset voltage, the first switch unit and the second switch unit are controlled to be conducted;
and in the first oscillation circuit, when the voltage of the element to be detected is detected to be zero, the first switch unit is controlled to be turned off.
7. The method according to claim 6, characterized by comprising, before the first switching unit and the second switching unit are controlled to be turned on when the charging voltage across the element to be measured is detected to reach a preset voltage, the steps of:
and controlling the first switch unit to be conducted and controlling the second switch unit to be disconnected so as to enable the element to be tested to be charged.
8. An oscillating wave voltage generation control device, which is applied to the oscillating wave voltage generation system according to any one of claims 1 to 5, characterized by comprising:
the first control module is used for controlling the first switch unit and the second switch unit to be conducted when detecting that the charging voltage at two ends of the element to be detected reaches a preset voltage;
and the second control module is used for controlling the first switch unit to be turned off when the voltage of the element to be detected is detected to be zero in the first oscillation loop.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 6 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 6 to 7.
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| CN203658523U (en) * | 2013-12-18 | 2014-06-18 | 上海思瑞在线监测技术有限公司 | Cable insulation detection equipment based on oscillating wave test |
| CN104407185B (en) * | 2014-12-08 | 2018-09-04 | 上海图菱新能源科技有限公司 | Electric power alternating wave generator |
| CN106646152A (en) * | 2016-11-18 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | High voltage cable partial discharge detection method and device |
| CN208334443U (en) * | 2018-05-04 | 2019-01-04 | 珠海华网科技有限责任公司 | High-voltage oscillation wave producer |
| CN108872857A (en) * | 2018-07-26 | 2018-11-23 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of generator scene mixing pressure test device and method |
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