CN215116748U - Arrester discharge counter calibrator - Google Patents

Abstract

The utility model discloses an arrester discharge counter check gauge relates to arrester discharge counter testing arrangement field. The arrester discharge counter calibrator comprises an ARM control unit, and a programmable direct-current power supply and a programmable constant-current source which are connected with the ARM control unit, wherein the programmable direct-current power supply is connected with a direct-current high-voltage generating unit, the direct-current high-voltage generating unit is connected with a high-voltage electronic switch, the programmable constant-current source is connected with a constant-current output switch, and the ARM control unit is connected with an LCD (liquid crystal display) screen, a rechargeable battery module and a key operation panel. The utility model discloses an arrester discharge counter check gauge can realize that arrester discharge counter count returns to zero, solves the field work personnel and can't return to zero problem to arrester discharge counter count, improves field work personnel work efficiency.

Description

Arrester discharge counter calibrator

Technical Field

The utility model relates to an arrester discharge counter testing arrangement field, concretely relates to arrester discharge counter check gauge.

Background

The lightning arrester is used for protecting various electrical equipment in an electric power system from being damaged by lightning overvoltage, operation overvoltage and power frequency overvoltage. And the lightning arrester discharge counter monitors the change condition of the leakage current of the lightning arrester in real time and records the discharge action times of the lightning arrester. Therefore, the 'inspection regulations on the state of power transmission and transformation equipment' requires that the lightning arrester discharge counter be detected once a year. The existing arrester discharge counter testing device has the functions of counting action testing of the arrester discharge counter and leakage current indication checking of the arrester discharge counter. The arrester discharge counter on the market is various in variety, different in counting indication, and has pointer type, digital type and the like, and the number of counting digit is different from one to three. After the on-site arrester discharge counter is checked and checked, the arrester discharge counter is required to be reset to zero frequently, and a worker discharges the arrester discharge counter for one time by using the arrester discharge counter testing device until the arrester discharge counter indicates 0, so that the workload is large and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the defect that the above-mentioned technique exists, the utility model provides a lightning arrester discharge counter check gauge.

The utility model discloses realize that the technical scheme that above-mentioned technological effect adopted is:

a lightning arrester discharge counter calibrator comprises an ARM control unit, a programmable direct-current power supply and a programmable constant-current source, wherein the programmable direct-current power supply and the programmable constant-current source are connected with the ARM control unit, the programmable direct-current power supply is connected with a direct-current high-voltage generating unit, the direct-current high-voltage generating unit is connected with a high-voltage electronic switch, the programmable constant-current source is connected with a constant-current output switch, and the ARM control unit is connected with an LCD (liquid crystal display) screen, a rechargeable battery module and a key operation panel.

Preferably, in the above arrester discharge counter calibrator, the dc high voltage generating unit includes a time-base circuit, a high voltage pulse transformer, a high voltage multiplier circuit, and an energy storage capacitor, which are connected in sequence, the time-base circuit is connected to the programmable dc power supply, and the energy storage capacitor is connected to the high voltage electronic switch.

Preferably, in the above lightning arrester discharge counter calibrator, the time-base circuit includes a self-excited multivibrator composed of a programmable timer chip U1, a resistor R1, a resistor R2, and a capacitor C1, the resistor R1, the resistor R2, and the capacitor C1 are connected in series, the positive terminal of the resistor R1 is connected to the programmable dc power supply, the DIS pin of the programmable timer chip U1 is connected to the connection between the resistor R1 and the resistor R2, the THR pin and the TRIG pin of the programmable timer chip U1 are respectively connected to the connection between the resistor R2 and the capacitor C1, and the negative terminal of the capacitor C1 is grounded.

Preferably, in the above lightning arrester discharge counter verifier, the high voltage pulse transformer includes a resistor R3, a power transistor Q1 and a pulse transformer T1, an output terminal of the programmable timer chip U1 is connected to a base of the power transistor Q1, an emitter of the power transistor Q1 is connected to a GND pin of the programmable timer chip U1 and grounded, and a collector of the power transistor Q1 is connected to a RST pin and a VCC pin of the programmable timer chip U1 and an anode of the resistor R1 in sequence through a primary side of the pulse transformer T1 and connected to the programmable dc power supply.

Preferably, in the above lightning arrester discharge counter check meter, the high voltage multiplier circuit includes a capacitor C3, a diode D1 and a diode D2, the diode D1 is connected in parallel to the secondary side of the pulse transformer T1, the capacitor C3 and the diode D2 are connected in series to one end of the secondary side of the pulse transformer T1, and a negative electrode of the diode D1 is connected between the capacitor C3 and a positive electrode of the diode D2.

Preferably, in the lightning arrester discharge counter check meter, the energy storage capacitor includes a capacitor C4 connected in parallel between the anode of the diode D1 and the cathode of the diode D2.

Preferably, in the lightning arrester discharge counter calibrator, the ARM control unit uses a processor with a core of Cortex-M4.

The utility model has the advantages that: the utility model discloses an arrester discharge counter check gauge can realize that arrester discharge counter count returns to zero, solves the field work personnel and can't return to zero problem to arrester discharge counter count, improves field work personnel work efficiency.

Drawings

FIG. 1 is a general block diagram of the present invention;

fig. 2 is a block diagram of the dc high voltage generating unit according to the present invention;

fig. 3 is a circuit diagram of the dc high voltage generating unit of the present invention.

Detailed Description

For a further understanding of the invention, reference is made to the following description taken in conjunction with the accompanying drawings and specific examples, in which:

in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

Referring to fig. 1, as shown in the drawings, an embodiment of the present invention provides a calibrator for a lightning arrester discharge counter, which includes an ARM control unit, and a programmable dc power supply and a programmable constant current source connected to the ARM control unit. The programmable direct current power supply is connected with a direct current high voltage generating unit, the direct current high voltage generating unit is connected with a high voltage electronic switch, and the programmable constant current source is connected with a constant current output switch. The programmable direct current power supply automatically adjusts direct current output according to the discharge output voltage peak value set by the key panel, and then converts the direct current output into required direct current high voltage through the direct current high voltage generating unit. The ARM control unit is connected with an LCD liquid crystal screen, a rechargeable battery module and a key operation panel. The LCD adopts a color LCD, and the data of the operation mode, the inspection parameters and the like can be clearly displayed by using a 480X 272 true color LCD module. The rechargeable battery module is powered by a high-performance lithium ion battery pack, and the rechargeable battery module provides electric energy required by the work of the whole machine through various high-efficiency voltage conversion circuits. The key operation panel selects an operation mode, sets an output voltage peak value, discharge times and a test current, confirms the setting, starts a test and the like, and displays the corresponding operation mode, the output voltage peak value, the test current, the preset output times, the discharge times and the like on the color LCD liquid crystal screen. As an optimized implementation mode of the utility model, the ARM control unit adopts the processor with the kernel of Cortex-M4, and the processor has 32-bit data processing capability, can process various data in real time and at high speed, and has the advantages of low power consumption, strong anti-interference capability and the like.

Specifically, in the preferred embodiment of the present invention, as shown in fig. 2, the dc high voltage generating unit includes a time base circuit, a high voltage pulse transformer, a high voltage multiplier circuit and an energy storage capacitor, which are connected in sequence. The time-base circuit is connected with the programmable direct-current power supply, and the energy storage capacitor is connected with the high-voltage electronic switch. The direct current high voltage generating unit is used for boosting the low-voltage direct current generated by the programmable direct current power supply to the required high voltage.

As a specific real-time mode, as shown in fig. 3, the time base circuit includes a free running multivibrator composed of a programmable timer chip U1, a resistor R1, a resistor R2, and a capacitor C1. The resistor R1, the resistor R2 and the capacitor C1 are connected in series, the positive terminal of the resistor R1 is connected with a programmable direct-current power supply, and the DIS pin of the programmable timer chip U1 is connected to the connection position between the resistor R1 and the resistor R2. The THR pin and the TRIG pin of the programmable timer chip U1 are connected to the connection point between the resistor R2 and the capacitor C1, respectively, and the negative electrode of the capacitor C1 is grounded. Specifically, as shown in fig. 3, the high-voltage pulse transformer includes a resistor R3, a power transistor Q1 and a pulse transformer T1, the output terminal of the programmable timer chip U1 is connected to the base of the power transistor Q1, and the emitter of the power transistor Q1 is connected to the GND pin of the programmable timer chip U1 and grounded. The collector of the power transistor Q1 is connected to the RST pin and the VCC pin of the programmable timer chip U1 and the anode of the resistor R1 in sequence through the primary side of the pulse transformer T1, and is connected to the programmable dc power supply. As shown in fig. 3, the high voltage multiplier circuit includes a capacitor C3, a diode D1, and a diode D2, the diode D1 is connected in parallel to the secondary side of the pulse transformer T1, the capacitor C3 and the diode D2 are connected in series to one end of the secondary side of the pulse transformer T1, and the cathode of the diode D1 is connected between the capacitor C3 and the anode of the diode D2. The energy storage capacitor comprises a capacitor C4 connected in parallel between the anode of the diode D1 and the cathode of the diode D2. The output end of the programmable timer chip U1, namely the square wave with the output frequency of 10KHz of No. 3 pin, the square wave output passes through a resistor R3, a power transistor Q1 and a pulse transformer T1, and high-voltage alternating current can be formed on the secondary side of the pulse transformer T1 and forms direct-current high voltage after passing through a high-voltage multiplication circuit of a capacitor C3, a diode D1, a diode D2 and a capacitor C4.

Specifically, in the embodiment of the utility model provides an in, under the count mode that discharges, operating panel can set up the arrester and discharge counter count action test output voltage peak value: the voltage peaks were 800V, 1200V and 1600V.

In the current verification mode, the operation panel can set a current verification output current value of the lightning arrester discharge counter. Specifically, the current output value is set to a constant output of 15 steps: 0.2mA-0.4mA-0.6mA-0.8mA-1.0mA-1.2mA-1.4mA-1.6mA-1.8mA-2.0mA-2.2mA-2.4mA-2.6mA-2.8mA-3.0 mA.

If the power supply voltage VCC is 10V, the transformation ratio of the pulse transformer T1 is 1:80, and the output high voltage of the dc high voltage generation unit is 1600V. The programmable constant current source automatically adjusts the output current value according to the calibration current set by the key panel. Under the mode of counting to zero, the operation panel can set the number of counting actions required by the lightning arrester discharge counter to count to zero.

Specifically, the counting and zeroing operation steps of the lightning arrester discharging counter are as follows:

1. and determining the number of times of discharge triggering required for returning to zero according to the current indicated value of the lightning arrester discharge counter.

2. Clicking the 'mode' button on the operation panel to select the mode of returning the count to zero.

3. Clicking the operation panels "↓" "←" → "key to set the number of times of the counting motion test.

4. Clicking the operation panel to determine, confirming the setting, and displaying parameters such as the operation mode of returning the count to 0, the preset test times, the test times and the like on the liquid crystal screen.

5. And clicking a 'test' button on the operation panel, and automatically and continuously carrying out action counting test on the lightning arrester discharge counter by the device until the counting of the set value is finished.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, but rather is described in the foregoing embodiments and the description with reference to the principles of the invention and that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended that all such changes and modifications fall within the scope of the invention as claimed, which is defined by the claims appended hereto and their equivalents.

Claims (7)

1. The lightning arrester discharge counter calibrator is characterized by comprising an ARM control unit, a programmable direct-current power supply and a programmable constant-current source, wherein the programmable direct-current power supply and the programmable constant-current source are connected with the ARM control unit, the programmable direct-current power supply is connected with a direct-current high-voltage generating unit, the direct-current high-voltage generating unit is connected with a high-voltage electronic switch, the programmable constant-current source is connected with a constant-current output switch, and the ARM control unit is connected with an LCD (liquid crystal display) screen, a rechargeable battery module and a key operation panel.

2. The arrester discharge counter calibrator according to claim 1, wherein the dc high voltage generation unit includes a time base circuit, a high voltage pulse transformer, a high voltage multiplier circuit, and an energy storage capacitor, which are connected in sequence, the time base circuit is connected to the programmable dc power supply, and the energy storage capacitor is connected to the high voltage electronic switch.

3. The arrester discharge counter calibrator according to claim 2, wherein the time-base circuit comprises a self-excited multivibrator consisting of a programmable timer chip U1, a resistor R1, a resistor R2 and a capacitor C1, the resistor R1, the resistor R2 and the capacitor C1 are connected in series, the positive terminal of the resistor R1 is connected to the programmable dc power supply, the DIS pin of the programmable timer chip U1 is connected to the connection between the resistor R1 and the resistor R2, the THR pin and the TRIG pin of the programmable timer chip U1 are respectively connected to the connection between the resistor R2 and the capacitor C1, and the negative terminal of the capacitor C1 is grounded.

4. The arrester discharge counter calibrator according to claim 3, wherein the high voltage pulse transformer comprises a resistor R3, a power transistor Q1 and a pulse transformer T1, the output terminal of the programmable timer chip U1 is connected to the base terminal of the power transistor Q1, the emitter terminal of the power transistor Q1 is connected to the GND pin of the programmable timer chip U1 and grounded, and the collector terminal of the power transistor Q1 is connected to the RST pin of the programmable timer chip U1, the VCC pin and the anode terminal of the resistor R1 in sequence via the primary side of the pulse transformer T1 and is connected to the programmable DC power supply.

5. The arrester discharge counter calibrator according to claim 4, wherein the high voltage multiplying circuit includes a capacitor C3, a diode D1 and a diode D2, the diode D1 is connected in parallel to the secondary side of the pulse transformer T1, the capacitor C3 and the diode D2 are connected in series to one end of the secondary side of the pulse transformer T1, and a cathode of the diode D1 is connected between the capacitor C3 and an anode of the diode D2.

6. The arrester discharge counter verifier according to claim 5, wherein the energy storage capacitor comprises a capacitor C4 connected in parallel between the anode of the diode D1 and the cathode of the diode D2.

7. The arrester discharge counter calibrator according to claim 5, wherein the ARM control unit employs a processor with a core of Cortex-M4.

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