CN114019246A - Lightning arrester testing device - Google Patents
Lightning arrester testing device Download PDFInfo
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- CN114019246A CN114019246A CN202111306997.XA CN202111306997A CN114019246A CN 114019246 A CN114019246 A CN 114019246A CN 202111306997 A CN202111306997 A CN 202111306997A CN 114019246 A CN114019246 A CN 114019246A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/14—Measuring resistance by measuring current or voltage obtained from a reference source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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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
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention provides a lightning arrester testing device, and belongs to the technical field of electric power detection. The lightning arrester testing device comprises a main loop and a control circuit, wherein the main loop converts a low-frequency power supply into a set high-frequency power supply through the action of a high-frequency inverter circuit and a filter circuit, the main loop can output the set high-voltage direct-current power supply through the action of a booster circuit, a high-voltage rectification circuit and an output circuit, the control circuit controls the main loop and monitors the voltage value and the leakage current value of the high-voltage direct-current power supply output by the control circuit, and therefore an operator can conveniently perform insulation resistance testing and direct-current reference voltage testing on the lightning arrester directly according to output data. The invention adopts the design of the main loop and the control circuit to realize the control output of the voltage value required when the lightning arrester is correspondingly tested, so that one instrument can simultaneously complete the insulation resistance test and the direct current reference voltage test, the quantity of the instruments and the wiring times required during the test are reduced, the labor is saved, and the operation risk is reduced.
Description
Technical Field
The invention belongs to the technical field of electric power detection, and particularly relates to a lightning arrester testing device.
Background
The lightning arrester is a widely used device in an electric power system, and is used for protecting other electric power devices from overvoltage damage, and the operation state of the lightning arrester is directly related to the stable operation of the electric power system. In order to monitor the state of the lightning arrester, the lightning arrester needs to be monitored in a live state or a power failure test at regular time. The most conventional lightning arrester power failure test items are insulation resistance test and direct current reference voltage test, and the two tests are required to be carried out no matter delivery, handover, pre-test or inspection test.
The principle of the insulation resistance test is that a certain voltage (generally 2500V or 5000V) is applied to two ends of the lightning arrester, the leakage current of the lightning arrester is measured, and the insulation resistance of the lightning arrester is calculated by test equipment, wherein if the insulation resistance is greater than a regulation specified value, the lightning arrester is qualified, otherwise, the lightning arrester is not qualified. The DC reference voltage test is to apply a voltage continuously increased from 0 to the two ends of the lightning arrester, monitor the leakage current value flowing through the lightning arrester, record the voltage value at the moment when the leakage current reaches 1mA, namely the DC reference voltage, and keep the voltage value within a certain reasonable range, then reduce the applied voltage to 75% of the DC reference voltage, and record the leakage current, which must not exceed 50 muA. Therefore, the principle of the equivalent circuit of the insulation resistance test and the test of the direct current reference voltage test is the same, and a certain voltage is applied to measure the leakage current. However, since the two tests are different in determination manner, it is necessary to perform the test using two different instruments (an insulation resistance tester and a dc high voltage generator).
Under the prior art condition, when testing personnel tested the arrester, all used two kinds of instruments of insulation resistance tester and direct current high voltage generator to carry out insulation resistance test and direct current reference voltage test respectively to the arrester, had following problem:
1. the high-voltage test instrument has large volume and heavy weight, and the carrying of two sets of instruments not only consumes manpower, but also occupies redundant transportation space;
2. when the lightning arrester is tested, the insulation resistance test is generally carried out firstly, and if the insulation resistance test is qualified, the direct current reference voltage test is carried out, so that two wiring processes are required, and the labor is wasted;
3. the lightning arrester is often installed higher, and therefore repeated wiring can lead to many times of high altitude operations of the test personnel, increasing the risk.
Disclosure of Invention
In view of this, the present invention provides a lightning arrester testing apparatus, which is used to complete an insulation resistance test and a dc reference voltage test by one-time wiring, and solve the above-mentioned problems existing in the prior art when the insulation resistance test and the dc reference voltage test are respectively performed.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a lightning arrester testing device, comprising: a main loop and a control circuit;
the main loop comprises a high-frequency inverter circuit, a filter circuit, a booster circuit, a high-voltage rectification circuit and an output circuit which are connected in sequence;
the high-frequency inverter circuit is used for converting the low-frequency power supply into a set high-frequency power supply so as to realize high-frequency alternating current output;
the filter circuit is used for filtering other frequency components in the high-frequency alternating voltage and only outputting voltage components with set frequency;
the booster circuit is used for boosting a voltage component with a set frequency into a high-voltage alternating-current power supply;
the high-voltage rectifying circuit is used for converting a high-voltage alternating current power supply into a high-voltage direct current power supply;
the output circuit is used for adding the high-voltage direct-current power supply to the lightning arrester and measuring the leakage current value of the lightning arrester;
the control circuit is respectively connected with the high-frequency inverter circuit and the output circuit through the control interface so as to control the high-frequency inverter circuit to convert the low-frequency power supply into a set high-frequency power supply, and the voltage value and the leakage current value of the high-voltage direct-current power supply are obtained through the output circuit.
Further, the high frequency inverter circuit specifically includes: a rectifying circuit;
the rectifying circuit comprises a first diode, a control switch, a first resistor and a first capacitor;
the control switch is controlled by the control circuit through the control interface, and is switched off when the voltage of the first capacitor is smaller than a set threshold value, so that the low-frequency power supply charges the first capacitor through the first diode and the first resistor; and when the first capacitor is fully charged, the first capacitor is closed so that the low-frequency power supply charges the first capacitor through the control switch.
Further, the high frequency inverter circuit further includes: an inverter circuit;
the inverter circuit comprises four switching tubes and four diodes;
the four switching tubes form an inverter bridge to connect the first capacitor and the filter circuit;
the control circuit controls the switching on and off of a switching tube on the inverter bridge through the control interface so as to convert the direct current output by the first capacitor into high-frequency alternating current and output the high-frequency alternating current to the filter circuit;
the four diodes are respectively connected with the four switching tubes in parallel one by one and are used for absorbing follow current when the four switching tubes are cut off.
Further, the control interface specifically includes: a drive interface;
the driving interface is respectively connected with the control switch and the four switching tubes and is used for controlling the control switch to be switched off when the voltage of the first capacitor is smaller than a set threshold value and controlling the control switch to be switched on after the first capacitor is fully charged; and the four switching tubes are also used for controlling the closing of the four switching tubes so as to convert the direct current output by the first capacitor into a set high-frequency power supply and output the high-frequency alternating current to the filter circuit.
Further, the filter circuit specifically includes: a second capacitor and a first inductor;
one end of the second capacitor is connected with the high-frequency inverter circuit, and the other end of the second capacitor is connected with the booster circuit through the first inductor;
the filter circuit filters out other frequency components in the high-frequency alternating voltage through the second capacitor and the first inductor, and only outputs a voltage component of a set frequency determined by the second capacitor and the first inductor.
Further, the boost circuit is specifically: a high-frequency step-up transformer;
one end of the high-frequency step-up transformer is connected with the filter circuit, the other end is connected with the high-voltage rectifying circuit, and the high-frequency step-up transformer steps up the voltage component with the set frequency into a high-voltage alternating-current power supply.
Further, the high-voltage rectifier circuit specifically includes: a sixth diode, a seventh diode, an eighth diode, a ninth diode, and a third capacitor;
a sixth diode, a seventh diode, an eighth diode and a ninth diode form a bridge to connect the boost circuit and the third capacitor;
the high-voltage rectifying circuit charges the third capacitor through the bridge so as to convert a high-voltage alternating current power supply into a high-voltage direct current power supply.
Further, the output circuit specifically includes: the device comprises a sensor, a discharge circuit and a wiring terminal;
the sensor comprises a micro-current sensor and a high-voltage sensor;
the micro-current sensor is used for measuring a leakage current value;
the high-voltage sensor is used for measuring a voltage value of a third capacitor, and the voltage value of the third capacitor is the voltage value of the high-voltage direct-current power supply;
the wiring terminal comprises a measuring terminal, a shielding terminal and a grounding terminal;
the measuring end and the shielding end are both connected with the anode of the third capacitor, and the grounding end is connected with the cathode of the third capacitor;
the discharge circuit comprises a bidirectional switch and a discharge resistor;
one end of the bidirectional switch is connected with the positive pole of the third capacitor, and the other end of the bidirectional switch is connected with the grounding end through the discharge resistor.
Further, the control interface further comprises: a sensor interface;
the sensor interface is respectively connected with the micro-current sensor and the high-voltage sensor and used for acquiring a leakage current value through the micro-current sensor and acquiring a voltage value of the high-voltage direct-current power supply through the high-voltage sensor.
Further, when carrying out the arrester experiment, binding post's mode of connection specifically is:
the measuring end is connected with the high-voltage end part of the lightning arrester, the grounding end is connected with the grounding end part of the lightning arrester, and the shielding end is connected with the middle upper part of the lightning arrester when the shielding mode is adopted to eliminate the surface leakage influence of the lightning arrester.
In summary, the present invention provides a lightning arrester testing apparatus, which includes a main circuit and a control circuit, wherein the main circuit converts a low frequency power supply into a set high frequency power supply through the actions of a high frequency inverter circuit and a filter circuit, and then the main circuit can output a set high voltage dc power supply through the actions of a boost circuit, a high voltage rectifier circuit and an output circuit, and the control circuit controls the main circuit and monitors the voltage value and the leakage current value of the high voltage dc power supply output by the main circuit, so that an operator can conveniently perform an insulation resistance test and a dc reference voltage test on a lightning arrester according to the output data. The invention adopts the design of the main loop and the control circuit to realize the control output of the voltage value required when the lightning arrester is correspondingly tested, so that one instrument can simultaneously complete the insulation resistance test and the direct current reference voltage test, the quantity of the instruments required during the test is reduced, the wiring times are reduced, the times of high-altitude operation of testers are reduced, the labor is saved, and the operation risk is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a main loop according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a control circuit according to an embodiment of the present invention.
In the drawings: d1-a first diode, R1-a first resistor, SCR 1-a control switch, C1-a first capacitor, I1-a first switch tube, I2-a second switch tube, I3-a third switch tube, I4-a fourth switch tube, D2-a second diode, D3-a third diode, D4-a fourth diode, D5-a fifth diode, C2-a second capacitor, L1-a first inductor, T1-a high-frequency boosting transformer, D6-a sixth diode, D7-a seventh diode, D8-an eighth diode, D9-a ninth diode, C3-a third capacitor, D10-a bidirectional switch and R2-a discharge resistor.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a lightning arrester testing device, which is used for solving the problems existing in the prior art when an insulation resistance test and a direct current reference voltage test are respectively carried out.
The following is a detailed description of an embodiment of a lightning arrester testing apparatus of the present invention.
Referring to fig. 1 and 2, the present embodiment provides an arrester testing apparatus, including: a main loop and a control circuit.
The main loop comprises a high-frequency inverter circuit, a filter circuit, a booster circuit, a high-voltage rectification circuit and an output circuit which are sequentially connected.
In the embodiment, the high-frequency inverter circuit is used for converting the low-frequency power supply into the set high-frequency power supply to realize high-frequency alternating current output.
It should be noted that the high frequency inverter circuit is used to convert a low frequency (e.g. 50Hz) power supply into a high frequency (e.g. 1kHz) power supply.
The high-frequency inverter circuit comprises a rectifying circuit and an inverter circuit.
The rectifier circuit is specifically configured to include a first diode D1, a control switch SCR1, a first resistor R1, and a first capacitor C1. The anode of the first diode D1 is connected with the anode of the low-frequency power supply, the cathode is connected with the anode of the first capacitor C1 through the first resistor R1, and the cathode of the first capacitor C1 is connected with the cathode of the low-frequency power supply. The control switch SCR1 is connected in parallel with the first resistor R1.
Further, under the control of the control circuit, when the voltage of the first capacitor is smaller than a set threshold, the SCR1 is controlled to be turned off, so that the low-frequency power supply charges the first capacitor through the first diode and the first resistor; control switch SCR1 closes when the first capacitor is fully charged so that the low frequency power supply charges the first capacitor through the control switch. That is, when the voltage of the capacitor C1 is low, the switch SCR1 is turned off to reduce the starting current, the 220V power supply charges the capacitor C1 through the resistor R1, and after the capacitor C1 is fully charged, the switch SCR1 is turned on, and at this time, if there is a voltage drop on the capacitor C1, the capacitor C1 can be rapidly charged to the capacitor C1, so that the voltage is kept stable.
The inverter circuit is specifically configured to include four switching tubes (I1-I4) and four diodes (D2-D5).
The four switching tubes form an inverter bridge to be connected with the first capacitor and the filter circuit, wherein the switching tubes on the bridge arms are alternately opened and closed, if the switching tubes I1 and I4 are simultaneously closed, the switching tubes I2 and I3 are simultaneously opened, otherwise, when the switching tubes I2 and I3 are simultaneously closed, the switching tubes I1 and T4 are simultaneously opened.
An inverter circuit composed of switching tubes I1, I2, I3 and I4 converts direct current on a capacitor C1 into high-frequency alternating current for output, and each switch (I1, I2, I3 and I4) is connected with a diode in parallel and used for absorbing follow current when the switch is cut off and preventing overvoltage.
In this embodiment, the filter circuit is configured to filter out other components of the high-frequency alternating voltage and output only a voltage component of a set frequency.
The filter circuit includes a second capacitor C2 and a first inductor L1, and one end of the second capacitor C2 is connected to the high-frequency inverter circuit, and the other end is connected to the booster circuit via the first inductor L1. The value of which is satisfied
When f is 1kHz,
the filter circuit is used for filtering other components in the high-frequency alternating current output by the high-frequency inverter circuit and outputting only a component of 1kHz to the booster circuit.
In the present embodiment, the booster circuit is used to boost a voltage component of a set frequency to a high-voltage alternating-current power supply.
The booster circuit is a high-frequency booster transformer, one end of which is connected to the filter circuit and the other end of which is connected to the high-voltage rectifier circuit. Because the power frequency is higher, and the magnetic flux is less, consequently, the volume of step-up transformer can be accomplished very little, has guaranteed the volume and the weight requirement of whole device.
In the present embodiment, the high-voltage rectification circuit is used to convert a high-voltage ac power supply into a high-voltage dc power supply.
The high-voltage rectifier circuit is a full-bridge rectifier circuit, and is composed of a sixth diode D6, a seventh diode D7, an eighth diode D8, a ninth diode D9, and a third capacitor C3. The circuit converts a high-frequency alternating current power supply output by the booster circuit into a high-voltage direct current power supply.
In this embodiment, the output circuit is used to apply the high voltage dc power to the arrester and measure the leakage current value of the arrester.
It should be noted that the output circuit includes a sensor, a discharge circuit, and a connection terminal.
The sensor comprises a micro-current sensor and a high-voltage sensor, the micro-current sensor is used for measuring leakage current flowing through the lightning arrester, the high-voltage sensor is used for measuring voltage on a third capacitor C3, and the voltage on the third capacitor C3 is high-voltage direct-current power supply voltage.
The discharge circuit comprises a bidirectional switch D10 and a discharge resistor R2, wherein one end of the bidirectional switch D10 is connected with the positive electrode of the third capacitor, and the other end of the bidirectional switch D10 is connected with the ground end through the discharge resistor. When D10 is turned on, C3 discharges through resistor R2.
The wiring terminal is divided into a measuring terminal, a shielding terminal and a grounding terminal. The measuring end and the shielding end are both connected with the anode of the third capacitor, and the grounding end is connected with the cathode of the third capacitor. The measuring end and the shielding end can output direct-current high voltage, the micro-current sensor is arranged in an output loop of the measuring end, and the high-voltage sensor measures the direct-current voltage of the capacitor C3.
When the arrester is subjected to insulation resistance test, the measuring end is connected with the high-voltage end part of the arrester, the grounding end is connected with the grounding end part of the arrester, and after pressurization, the micro-current sensor measures micro-current flowing through the arrester. If the surface leakage influence of the lightning arrester is to be eliminated in a shielding mode, the shielding end is connected to the middle upper part of the lightning arrester, and because the potentials of the shielding end and the measuring end are the same, the current of the measuring end is prevented from flowing through the surface of the lightning arrester, and the interference is eliminated.
In this embodiment, the control circuit is connected to the high-frequency inverter circuit and the output circuit through the control interface, so as to control the high-frequency inverter circuit to convert the low-frequency power supply into the set high-frequency power supply, and further obtain the voltage value and the leakage current value of the high-voltage dc power supply through the output circuit.
It should be noted that the control interface includes two parts, namely a driving interface and a sensor interface.
The driving interface is respectively connected with a control switch and four switching tubes in the high-frequency inverter circuit and is used for controlling the control switch to be switched off when the voltage of the first capacitor is smaller than a set threshold value and controlling the control switch to be switched on after the first capacitor is fully charged; and the four switching tubes are also used for controlling the closing of the four switching tubes so as to convert the direct current output by the first capacitor into a set high-frequency power supply and output the high-frequency alternating current to the filter circuit. Specifically, the control circuit controls the operation of each switch in a PWM manner, that is, the PWM technology in the prior art is used to control the operation of the switches so as to adjust the amplitude and frequency of the output voltage, thereby implementing the inversion process and outputting a controllable voltage to the subsequent circuit.
The sensor interface is respectively connected with a micro-current sensor and a high-voltage sensor in the output circuit and used for acquiring a leakage current value through the micro-current sensor and acquiring a voltage value of the high-voltage direct-current power supply through the high-voltage sensor.
Furthermore, the control circuit is also provided with a power supply module for power supply, keys for man-machine interaction, an LED display and a main control chip serving as a control core of the control circuit.
Based on the above arrangement, the working principle of the lightning arrester testing device provided by this embodiment is as follows (taking 220V dc with 50Hz as an example for the low-frequency power supply):
firstly, a control circuit controls a high-frequency inverter circuit in a main loop to normally work, a 220V power supply is inverted from 50Hz to 1kHz, other components in a high-frequency alternating current power supply are filtered by a filter circuit, only 1kHz sinusoidal component is reserved, the high-frequency alternating current power supply is boosted by a booster circuit and then converted into a high-voltage direct current power supply by a high-voltage rectification circuit, a high-voltage sensor detects the voltage on a capacitor C3 to ensure that the voltage is controlled, and a micro-current sensor acquires micro-current at a measuring end, namely leakage current value.
Then, when the insulation resistance test is carried out, a user determines the value of the direct current voltage, and the control circuit controls the output voltage of the high-frequency inverter circuit to charge the third capacitor C3 to the value. The measuring end, the shielding end and the grounding end are connected with wires, the micro-current sensor transmits the measured micro-current value to the control circuit, and the control current calculates the insulation resistance value according to ohm's law. And judging whether the current insulation resistance value meets the regulation specification or not according to the regulation specification value (the value can be set in a control circuit) of the lightning arrester, if so, prompting a user to continue the test of the direct-current reference voltage, and determining by the user. And controlling the high-frequency inverter circuit to stop working, suspending charging of the capacitor C3, and simultaneously, reducing the voltage of the capacitor C3 to 0V by the discharge circuit to prepare for measurement of the direct-current reference voltage.
When the direct current reference voltage is measured, the high-frequency inverter circuit is controlled to work again, the third capacitor C3 is pressurized from 0 through the control of the control circuit, meanwhile, the measured value of the micro-current sensor is detected, when the current is close to 1mA, the high-frequency inverter circuit is controlled to stop working, and the voltage value of the C3 at the moment is recorded, namely the direct current reference voltage. The discharge circuit was then operated to reduce the C3 voltage to 75% U1mA and the leakage current value was recorded, completing the test.
The embodiment provides an arrester test device, including main loop and control circuit, wherein the main loop passes through high frequency inverter circuit and filter circuit's effect, convert the low frequency power supply into the high frequency power supply of settlement, again via boost circuit, high voltage rectifier circuit and output circuit's effect makes the main loop can output the high voltage direct current power supply of settlement, control circuit controls the main loop and monitors the high voltage direct current power supply magnitude of voltage and the leakage current value of its output, thereby make things convenient for the operating personnel to directly carry out insulation resistance test and direct current reference voltage test to the arrester according to the data of output. The invention adopts the design of the main loop and the control circuit to realize the control output of the voltage value required when the lightning arrester is correspondingly tested, so that one instrument can simultaneously complete the insulation resistance test and the direct current reference voltage test, the quantity of the instruments required during the test is reduced, the wiring times are reduced, the times of high-altitude operation of testers are reduced, the labor is saved, and the operation risk is reduced.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An arrester testing device, comprising: a main loop and a control circuit;
the main loop comprises a high-frequency inverter circuit, a filter circuit, a booster circuit, a high-voltage rectification circuit and an output circuit which are connected in sequence;
the high-frequency inverter circuit is used for converting a low-frequency power supply into a set high-frequency power supply so as to realize high-frequency alternating current output;
the filter circuit is used for filtering other frequency components in the high-frequency alternating voltage and only outputting voltage components with set frequency;
the booster circuit is used for boosting the voltage component of the set frequency into a high-voltage alternating-current power supply;
the high-voltage rectifying circuit is used for converting the high-voltage alternating current power supply into a high-voltage direct current power supply;
the output circuit is used for adding the high-voltage direct-current power supply to the lightning arrester and measuring the leakage current value of the lightning arrester;
the control circuit is respectively connected with the high-frequency inverter circuit and the output circuit through a control interface so as to control the high-frequency inverter circuit to convert a low-frequency power supply into a set high-frequency power supply, and the voltage value and the leakage current value of the high-voltage direct-current power supply are obtained through the output circuit.
2. The arrester testing apparatus according to claim 1, wherein the high-frequency inverter circuit specifically includes: a rectifying circuit;
the rectifying circuit comprises a first diode, a control switch, a first resistor and a first capacitor;
the control switch is controlled by the control circuit through the control interface, and is switched off when the voltage of the first capacitor is smaller than a set threshold value, so that the low-frequency power supply charges the first capacitor through the first diode and the first resistor; and when the first capacitor is fully charged, the first capacitor is closed so that the low-frequency power supply can charge the first capacitor through the control switch.
3. A lightning arrester testing apparatus according to claim 2, wherein the high-frequency inverter circuit further comprises: an inverter circuit;
the inverter circuit comprises four switching tubes and four diodes;
the four switching tubes form an inverter bridge to connect the first capacitor and the filter circuit;
the control circuit controls the switching on and off of a switching tube on the inverter bridge through the control interface so as to convert the direct current output by the first capacitor into high-frequency alternating current and output the high-frequency alternating current to the filter circuit;
the four diodes are respectively connected with the four switching tubes in parallel one by one and are used for absorbing follow current when the four switching tubes are cut off.
4. A lightning arrester testing apparatus according to claim 3, characterized in that the control interface comprises in particular: a drive interface;
the driving interface is respectively connected with the control switch and the four switching tubes and is used for controlling the control switch to be switched off when the voltage of the first capacitor is smaller than a set threshold value and controlling the control switch to be switched on after the first capacitor is fully charged; and the four switching tubes are also used for controlling the closing of the four switching tubes so as to convert the direct current output by the first capacitor into a set high-frequency power supply and output high-frequency alternating current to the filter circuit.
5. An arrester testing device according to claim 1, characterized in that the filter circuit comprises in particular: a second capacitor and a first inductor;
one end of the second capacitor is connected with the high-frequency inverter circuit, and the other end of the second capacitor is connected with the booster circuit through the first inductor;
the filter circuit filters other frequency components in the high-frequency alternating voltage through the second capacitor and the first inductor, and only outputs a voltage component of a set frequency determined by the second capacitor and the first inductor.
6. The arrester testing apparatus according to claim 1, wherein the booster circuit is specifically: a high-frequency step-up transformer;
one end of the high-frequency step-up transformer is connected with the filter circuit, the other end of the high-frequency step-up transformer is connected with the high-voltage rectification circuit, and the high-frequency step-up transformer steps up the voltage component with the set frequency into a high-voltage alternating-current power supply.
7. The arrester testing apparatus according to claim 1, wherein the high-voltage rectifying circuit specifically includes: a sixth diode, a seventh diode, an eighth diode, a ninth diode, and a third capacitor;
the sixth diode, the seventh diode, the eighth diode and the ninth diode form a bridge to connect the boost circuit and the third capacitor;
the high-voltage rectifying circuit charges the third capacitor through the bridge so as to convert the high-voltage alternating current power supply into a high-voltage direct current power supply.
8. An arrester testing device according to claim 7, characterized in that the output circuit comprises in particular: the device comprises a sensor, a discharge circuit and a wiring terminal;
the sensors include a micro-current sensor and a high voltage sensor;
the micro-current sensor is used for measuring the leakage current value;
the high-voltage sensor is used for measuring a voltage value of the third capacitor, and the voltage value of the third capacitor is the voltage value of the high-voltage direct-current power supply;
the wiring terminal comprises a measuring end, a shielding end and a grounding end;
the measuring end and the shielding end are connected with the anode of the third capacitor, and the grounding end is connected with the cathode of the third capacitor;
the discharge circuit comprises a bidirectional switch and a discharge resistor;
one end of the bidirectional switch is connected with the positive electrode of the third capacitor, and the other end of the bidirectional switch is connected with the grounding end through the discharge resistor.
9. A lightning arrester testing apparatus according to claim 8 wherein the control interface further comprises: a sensor interface;
the sensor interface is respectively connected with the micro-current sensor and the high-voltage sensor and used for acquiring the leakage current value through the micro-current sensor and acquiring the voltage value of the high-voltage direct-current power supply through the high-voltage sensor.
10. An arrester testing device according to claim 8, wherein when the arrester test is performed, the connection mode of the connection terminal is specifically as follows:
the measuring end is connected with the high-voltage end part of the lightning arrester, the grounding end is connected with the grounding end part of the lightning arrester, and the shielding end is connected with the middle upper part of the lightning arrester when the shielding mode is adopted to eliminate the surface leakage influence of the lightning arrester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111306997.XA CN114019246A (en) | 2021-11-05 | 2021-11-05 | Lightning arrester testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111306997.XA CN114019246A (en) | 2021-11-05 | 2021-11-05 | Lightning arrester testing device |
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| CN114019246A true CN114019246A (en) | 2022-02-08 |
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| CN202111306997.XA Pending CN114019246A (en) | 2021-11-05 | 2021-11-05 | Lightning arrester testing device |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1599215A (en) * | 1997-03-06 | 2005-03-23 | 株式会社I-Hits研究所 | Power factor improving circuit |
| KR20050091437A (en) * | 2004-03-12 | 2005-09-15 | 경상대학교산학협력단 | High frequency link current-fed inverter with active input filter |
| CN101954313A (en) * | 2010-09-08 | 2011-01-26 | 上海理工大学 | High-frequency high-voltage switching power supply for electric precipitation |
| CN201900045U (en) * | 2010-12-17 | 2011-07-20 | 张寅啸 | Three-phase intermediate-frequency direct-current high-voltage power supply of electric precipitator |
| CN103219913A (en) * | 2013-03-15 | 2013-07-24 | 东南大学 | High-voltage pulse power supply for plasma sewage treatment system |
| CN103792415A (en) * | 2014-02-13 | 2014-05-14 | 国家电网公司 | Anti-interference device for lightning arrester leakage current detection |
| CN104251956A (en) * | 2014-10-11 | 2014-12-31 | 国家电网公司 | Lightning arrestor online monitoring device with shielding function |
| CN104816273A (en) * | 2014-05-26 | 2015-08-05 | 威海聚力微特电机有限公司 | Single phase variable frequency driving impact electric wrench |
| CN106452160A (en) * | 2016-10-12 | 2017-02-22 | 苏州科技大学 | Multi-order voltage-multiplying low-ripple-wave direct-current high-voltage generation apparatus |
| CN106817036A (en) * | 2015-11-27 | 2017-06-09 | 中国电力科学研究院 | A kind of insulator artificial pollution test high-voltage DC power supply |
| CN107817398A (en) * | 2017-10-18 | 2018-03-20 | 国网黑龙江省电力有限公司检修公司 | Improved lightning arrester on-Line Monitor Device and monitoring method |
| CN110297169A (en) * | 2019-06-28 | 2019-10-01 | 广东电网有限责任公司 | A kind of 10kV metal oxide arrester integrated experiment device |
| CN111044871A (en) * | 2020-01-08 | 2020-04-21 | 广东电网有限责任公司 | Integrated 10kV zinc oxide arrester test system and method |
-
2021
- 2021-11-05 CN CN202111306997.XA patent/CN114019246A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1599215A (en) * | 1997-03-06 | 2005-03-23 | 株式会社I-Hits研究所 | Power factor improving circuit |
| KR20050091437A (en) * | 2004-03-12 | 2005-09-15 | 경상대학교산학협력단 | High frequency link current-fed inverter with active input filter |
| CN101954313A (en) * | 2010-09-08 | 2011-01-26 | 上海理工大学 | High-frequency high-voltage switching power supply for electric precipitation |
| CN201900045U (en) * | 2010-12-17 | 2011-07-20 | 张寅啸 | Three-phase intermediate-frequency direct-current high-voltage power supply of electric precipitator |
| CN103219913A (en) * | 2013-03-15 | 2013-07-24 | 东南大学 | High-voltage pulse power supply for plasma sewage treatment system |
| CN103792415A (en) * | 2014-02-13 | 2014-05-14 | 国家电网公司 | Anti-interference device for lightning arrester leakage current detection |
| CN104816273A (en) * | 2014-05-26 | 2015-08-05 | 威海聚力微特电机有限公司 | Single phase variable frequency driving impact electric wrench |
| CN104251956A (en) * | 2014-10-11 | 2014-12-31 | 国家电网公司 | Lightning arrestor online monitoring device with shielding function |
| CN106817036A (en) * | 2015-11-27 | 2017-06-09 | 中国电力科学研究院 | A kind of insulator artificial pollution test high-voltage DC power supply |
| CN106452160A (en) * | 2016-10-12 | 2017-02-22 | 苏州科技大学 | Multi-order voltage-multiplying low-ripple-wave direct-current high-voltage generation apparatus |
| CN107817398A (en) * | 2017-10-18 | 2018-03-20 | 国网黑龙江省电力有限公司检修公司 | Improved lightning arrester on-Line Monitor Device and monitoring method |
| CN110297169A (en) * | 2019-06-28 | 2019-10-01 | 广东电网有限责任公司 | A kind of 10kV metal oxide arrester integrated experiment device |
| CN111044871A (en) * | 2020-01-08 | 2020-04-21 | 广东电网有限责任公司 | Integrated 10kV zinc oxide arrester test system and method |
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