CN113504426A - Device and method for testing inductive discharge anti-interference capability of intelligent equipotential operation equipment - Google Patents

Abstract

The invention discloses an inductive discharge immunity testing device, method and system for intelligent equipotential operation equipment. The method includes: acquiring different sizes of intelligent equipotential operation equipment at different ground capacitances, arc lengths and working voltages The first arc discharge current under the condition; according to the first arc discharge current, the fitting formula of the arc discharge current is determined; The second arc discharge current under different ground capacitance and different arc length conditions; calculate the first capacitance according to the largest second arc discharge current; adjust the capacitance of the adjustable capacitor as the first capacitor, and adjust the output voltage of the test transformer as The preset voltage is used to test the anti-disturbance ability of induction discharge, and the anti-disturbance ability of induction discharge of the target intelligent equipotential operation equipment is determined according to the working state of the target intelligent equipotential operation equipment.

Description

Induction discharge immunity test device and method for intelligent equipotential operation equipment

technical field

The invention relates to the technical field of electromagnetic compatibility of power transmission and transformation engineering, and more particularly, to an inductive discharge immunity test device and method of intelligent equipotential operation equipment.

Background technique

When the intelligent equipotential operation equipment is working, it is usually sent to the equipotential through the equipotential transmission device. When entering or exiting the equipotential, there is an inductive discharge between the transmission device and the metal part of the intelligent equipotential operation equipment and the wire, and arcs The discharge produces a wide-band current pulse and a violently changing electromagnetic field in the space, which often causes the intelligent equipotential operation equipment to malfunction, refuse to operate, or even burn electrical components. The higher the voltage level, the stronger the interference caused by arc discharge, which has become one of the problems that limit the popularization and application of power intelligent equipotential operation equipment. The existing electromagnetic protection measures are lack of pertinence, and the electromagnetic compatibility standard of intelligent equipotential operation equipment has no detection items for induced discharge, which makes intelligent equipotential operation equipment often encounter electromagnetic interference problems in actual work, which affects normal operation.

SUMMARY OF THE INVENTION

The present invention provides a device, method and system for testing the anti-disturbance ability of induction discharge of intelligent equipotential operation equipment, so as to solve the problem of how to test the anti-disturbance ability of induction discharge of intelligent equipotential operation equipment.

In order to solve the above problems, according to one aspect of the present invention, an inductive discharge immunity test device for intelligent equipotential operation equipment is provided, the device includes: voltage and capacitance control equipment, test transformers, insulating struts, adjustable capacitors and Insulating base; of which,

The voltage and capacitance control equipment is respectively connected with the test transformer and the adjustable capacitor, and is used to control the high-voltage signal output by the test transformer and the capacitance value of the adjustable capacitor;

the test transformer is connected to the bus bar, and is used for outputting the high-voltage signal to the bus bar, so that the bus bar and the intelligent equipotential working equipment generate an arc;

the insulating support column is connected with the bus bar and is used for supporting the bus bar;

The insulating base is used to keep the intelligent equipotential operation equipment in a floating potential state;

The adjustable capacitor is connected with the intelligent equipotential operation equipment, and the arc discharge current is adjusted by controlling the capacitance value of the adjustable capacitor.

Preferably, wherein the device further comprises:

a voltage divider, which is respectively connected to the test transformer and the voltage and capacitance control equipment, and is used to divide the high voltage signal output by the test transformer into a low voltage signal, and input the low voltage signal to the voltage and capacitance control equipment, So that the voltage-capacitance control device calibrates the high-voltage signal output by the test transformer according to the low-voltage signal.

Preferably, wherein the device further comprises: a conductor adjustment device and a conductor; wherein,

The conductor is connected with the busbar, and the busbar generates an arc with the intelligent equipotential operation equipment through the conductor;

The conductor adjusting device is placed on the insulating support and is used for adjusting the arc length between the conductor and the intelligent equipotential working equipment.

According to another aspect of the present invention, a method for testing the inductive discharge immunity of intelligent equipotential operation equipment is provided, the method comprising:

Obtain the first arc discharge current of different sizes of intelligent equipotential operation equipment under different conditions of ground capacitance, arc length and working voltage;

According to the obtained first arc discharge currents of different sizes of intelligent equipotential operation equipment under different ground capacitance, arc length and working voltage conditions, the arc discharge current fitting formula is determined;

According to the arc discharge current fitting formula, calculate the second arc discharge current of the target intelligent equipotential operation equipment under the conditions of preset working voltage, different capacitances to ground and different arc lengths;

According to the maximum second arc discharge current and the preset voltage output by the test transformer, calculate the first capacitance of the adjustable capacitor in the inductive discharge immunity test device;

Using the inductive discharge immunity test device, the inductive discharge immunity test is carried out according to the first capacitor and the preset voltage, and the working state of the target intelligent equipotential operation equipment is obtained, and the target intelligent equipotential The working state of the working equipment determines the inductive discharge immunity of the target intelligent equipotential working equipment.

Preferably, wherein the arc discharge current fitting formula includes:

，

,

为电弧放电电流；

为智能等电位作业设备的对地电容；d为电弧长度；

为智能等电位作业设备的工作电压；

均为拟合系数。in,

is the arc discharge current;

is the ground capacitance of the intelligent equipotential equipment; d is the arc length;

It is the working voltage of the intelligent equipotential working equipment;

are fitting coefficients.

Preferably, the calculation of the first capacitance of the adjustable capacitance in the inductive discharge immunity test device according to the maximum second arc discharge current and the preset voltage output by the test transformer includes:

，

,

为可调电容的第一电容；

为试验变压器输出的预设电压；

为最大的第二电弧放电电流；j表示是复数；

为角频率。in,

is the first capacitor of the adjustable capacitor;

is the preset voltage output by the test transformer;

is the largest second arc discharge current; j represents a complex number;

is the angular frequency.

Preferably, the determination of the inductive discharge immunity of the target intelligent equipotential equipment according to the working state of the target intelligent equipotential equipment includes:

If the working state of the intelligent equipotential working equipment is a normal state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the first level;

If the working state of the intelligent equipotential bonding equipment is reduced in performance and can return to a normal state after removing the interference, then determine that the inductive discharge immunity of the target smart equipotential bonding equipment is at the second level;

If the working state of the intelligent equipotential bonding equipment is reduced in performance and cannot be restored to a normal state after removing the interference, it is determined that the inductive discharge immunity of the target smart equipotential bonding equipment is at the third level;

If the working state of the intelligent equipotential working equipment is in an inoperable state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the fourth level.

Preferably, wherein the method further comprises:

Adjust the output voltage of the test transformer and the capacitance value of the adjustable capacitor by using a voltage and capacitance control device.

Preferably, wherein the method further comprises:

Use a voltage divider to divide the high-voltage signal output by the test transformer into a low-voltage signal;

Using the voltage-capacitance control device, the high-voltage signal output by the test transformer is calibrated according to the low-voltage signal, so that the voltage of the high-voltage signal output by the test transformer is the preset voltage.

According to another aspect of the present invention, an inductive discharge immunity test system for intelligent equipotential operation equipment is provided, the system comprising:

a first arc discharge current acquisition unit, used for acquiring the first arc discharge current of different sizes of intelligent equipotential operation equipment under different conditions of ground capacitance, arc length and working voltage;

The fitting unit is used for fitting according to the obtained first arc discharge currents of different sizes of intelligent equipotential equipment under different conditions of ground capacitance, arc length and working voltage, so as to determine the arc discharge current fitting formula;

The second arc discharge current calculation unit is configured to calculate, according to the arc discharge current fitting formula, the second arc of the target intelligent equipotential operation equipment under the conditions of a preset working voltage, different capacitances to ground and different arc lengths Discharge current;

a first capacitance calculation unit, configured to calculate the first capacitance of the adjustable capacitance in the inductive discharge immunity test device according to the maximum second arc discharge current and the preset voltage output by the test transformer;

The test unit is used for using the inductive discharge immunity test device to perform an inductive discharge immunity test according to the first capacitor and the preset voltage, to obtain the working state of the target intelligent equipotential operation equipment, and according to the The working state of the target intelligent equipotential working equipment determines the inductive discharge immunity of the target intelligent equipotential working equipment.

Preferably, in the fitting unit, the arc discharge current fitting formula includes:

，

,

为电弧放电电流；

为智能等电位作业设备的对地电容；d为电弧长度；

为智能等电位作业设备的工作电压；

均为拟合系数。in,

is the arc discharge current;

is the ground capacitance of the intelligent equipotential equipment; d is the arc length;

It is the working voltage of the intelligent equipotential working equipment;

are fitting coefficients.

Preferably, the first capacitance calculation unit, according to the maximum second arc discharge current and the preset voltage output by the test transformer, calculates the first capacitance of the adjustable capacitance in the inductive discharge immunity test device, including:

，

,

为可调电容的第一电容；

为试验变压器输出的预设电压；

为最大的第二电弧放电电流；j表示是复数；

为角频率。in,

is the first capacitor of the adjustable capacitor;

is the preset voltage output by the test transformer;

is the largest second arc discharge current; j represents a complex number;

is the angular frequency.

Preferably, wherein the testing unit determines the inductive discharge immunity capability of the target intelligent equipotential equipment according to the working state of the target intelligent equipotential equipment, including:

If the working state of the intelligent equipotential working equipment is a normal state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the first level;

If the working state of the intelligent equipotential bonding equipment is reduced in performance and can return to a normal state after removing the interference, then determine that the inductive discharge immunity of the target smart equipotential bonding equipment is at the second level;

If the working state of the intelligent equipotential bonding equipment is reduced in performance and cannot be restored to a normal state after removing the interference, it is determined that the inductive discharge immunity of the target smart equipotential bonding equipment is at the third level;

If the working state of the intelligent equipotential working equipment is in an inoperable state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the fourth level.

Preferably, wherein the system further comprises:

The adjusting unit is used for adjusting the voltage output by the test transformer and the capacitance value of the adjustable capacitor by using the voltage and capacitance control device.

Preferably, wherein the system further comprises:

A signal calibration unit for dividing the high voltage signal output by the test transformer into a low voltage signal by using a voltage divider, and using the voltage capacitance control device to calibrate the high voltage signal output by the test transformer according to the low voltage signal , so that the voltage at which the test transformer outputs the high-voltage signal is the preset voltage.

The invention provides an inductive discharge immunity test device for intelligent equipotential operation equipment, comprising: a test transformer, a voltage divider, a first insulating strut, a second insulating strut and an adjustable capacitor, which can realize the test transformer by adjusting the test transformer. The capacitance of voltage and adjustable capacitor can safely and accurately simulate the working environment of intelligent equipotential operation equipment, thus providing support for the inductive discharge immunity test of intelligent equipotential operation equipment. The present invention also provides a method and system for testing the anti-disturbance capability of induction discharge of intelligent equipotential operation equipment, comprising: determining an arc discharge current fitting formula, determining a first capacitor according to the arc discharge current fitting formula, adjusting the value of the adjustable capacitor The capacitor is the first capacitor, and the voltage output by the test transformer is adjusted to be a preset voltage, so as to perform an inductive discharge immunity test, and determine the target intelligent equipotential equipment according to the working state of the target intelligent equipotential equipment It can provide a solution for the detection of the lack of induction discharge electromagnetic interference in the current intelligent equipotential operation equipment, and can ensure that the intelligent equipotential operation equipment will not malfunction or refuse to operate due to electromagnetic interference in practical applications. Even damaged, the operation is simple and convenient.

Description of drawings

Exemplary embodiments of the present invention may be more fully understood by reference to the following drawings:

FIG. 1 is a schematic structural diagram of an inductive discharge immunity testing device 100 for intelligent equipotential operation equipment according to an embodiment of the present invention;

FIG. 2 is an exemplary diagram of an inductive discharge immunity test device of an intelligent equipotential working equipment according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method 300 for testing the inductive discharge immunity capability of an intelligent equipotential working device according to an embodiment of the present invention;

4 is a schematic diagram of the induction discharge of the intelligent equipotential operation equipment based on the existing induction discharge immunity test device;

5 is a schematic diagram of calculating the capacitance to ground of an intelligent equipotential working device according to an embodiment of the present invention;

6 is a schematic diagram of the induction discharge of the intelligent equipotential operation equipment of the induction discharge immunity test device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an inductive discharge immunity testing system 700 of an intelligent equipotential working device according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for the purpose of this thorough and complete disclosure invention, and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings are not intended to limit the invention. In the drawings, the same elements/elements are given the same reference numerals.

Unless otherwise defined, terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is to be understood that terms defined in commonly used dictionaries should be construed as having meanings consistent with the context in the related art, and should not be construed as idealized or overly formal meanings.

FIG. 1 is a schematic structural diagram of an inductive discharge immunity testing device 100 of an intelligent equipotential working equipment according to an embodiment of the present invention. As shown in FIG. 1 , the device for testing the inductive discharge immunity of the intelligent equipotential operation equipment provided by the embodiment of the present invention can quickly and efficiently test the inductive discharge immunity of the intelligent equipotential operation equipment. The device for testing the inductive discharge immunity of the intelligent equipotential operation equipment provided by the embodiment of the present invention includes: a voltage and capacitance control device 101 , a test transformer 102 , an insulating support 103 , an adjustable capacitor 104 and an insulating base 105 .

Preferably, the voltage and capacitance control device 101 is respectively connected with the test transformer and the adjustable capacitor, and is used to control the high voltage signal output by the test transformer and the capacitance value of the adjustable capacitor.

Preferably, the test transformer 102 is connected to the bus bar, and is used for outputting the high-voltage signal to the bus bar, so that the bus bar and the intelligent equipotential working equipment generate an arc.

Preferably, the insulating support 103 is connected to the bus bar for supporting the bus bar.

Preferably, the adjustable capacitor 104 is connected to the intelligent equipotential operation equipment, and the arc discharge current is adjusted by controlling the capacitance value of the adjustable capacitor.

Preferably, the insulating base 105 is used to keep the intelligent equipotential working equipment in a floating potential state.

Preferably, wherein the device further comprises:

a voltage divider, which is respectively connected to the test transformer and the voltage and capacitance control equipment, and is used to divide the high voltage signal output by the test transformer into a low voltage signal, and input the low voltage signal to the voltage and capacitance control equipment, So that the voltage-capacitance control device calibrates the high-voltage signal output by the test transformer according to the low-voltage signal.

Preferably, wherein the device further comprises: a conductor adjustment device and a conductor; wherein,

The conductor is connected with the busbar, and the busbar generates an arc with the intelligent equipotential operation equipment through the conductor;

The conductor adjusting device is placed on the insulating support and is used for adjusting the arc length between the conductor and the intelligent equipotential working equipment.

FIG. 2 is an example diagram of an inductive discharge immunity testing device of an intelligent equipotential working device according to an embodiment of the present invention. As shown in Fig. 2, the device includes: voltage and capacitance adjustment equipment, test transformer, voltage divider, insulating support, adjustable capacitor, conductor adjustment device, conductor and insulating base. The voltage-capacitance control device is used to control the high-voltage signal output by the test transformer and the capacitance value of the adjustable capacitor. The test transformer is used for outputting the high-voltage signal to the bus bar, so that the bus bar and the intelligent equipotential working device generate an arc. The insulating support is used for supporting the bus bar. The arc discharge current is adjusted by controlling the capacitance value of the adjustable capacitor. The insulating base is used to keep the intelligent equipotential operation equipment in a floating potential state. The voltage divider is used to divide the high voltage signal output by the test transformer into a low voltage signal, and input the low voltage signal to the voltage and capacitance control device, so that the voltage and capacitance control device can compare the voltage to the voltage and capacitance control device according to the low voltage signal. The high-voltage signal output by the test transformer is calibrated. The busbar generates an electric arc with the intelligent equipotential working device through the conductor. The conductor adjusting device is used for adjusting the arc length of the conductor and the intelligent equipotential working equipment.

Due to the different models of intelligent equipotential equipment, in order to facilitate connection, a terminal can be set on the insulating base, and both the adjustable capacitor and the intelligent equipotential equipment are connected to the terminal, so as to realize the adjustable capacitor and intelligent equipotential operation. Electrical connection of equipment.

During the test, first determine the voltage value of the high-voltage signal output by the test transformer, the arc length d and the capacitance value of the adjustable capacitor; then, use the conductor adjustment device to adjust the arc length, and use the voltage-capacitance control device to control the output of the test transformer. Voltage value, use the voltage and capacitance control device to control the capacitance value of the adjustable capacitor, so as to measure the arc discharge current through the current transformer installed at the top of the intelligent equipotential operation equipment, and send it to the oscilloscope through the coaxial cable, so as to measure the arc discharge current according to the arc discharge The magnitude of the current tests the inductive discharge immunity of the target intelligent equipotential equipment. In addition, since there is an error between the magnitude of the high-voltage signal output by the experimental transformer and the voltage signal set at the voltage-capacitance control device, the voltage-capacitance control device is used to calibrate the high-voltage signal output by the test transformer according to the magnitude of the signal output by the voltage divider , so that the high-voltage signal output by the test transformer meets the test requirements.

There are three ways of live work: zero potential (or ground potential, both towers and the ground are zero potential), intermediate potential and equipotential. (work); intermediate potential work means that people/equipment work between the earth or tower and high-voltage lines; equipotential work is that people/equipment work on high-voltage lines (the potential is equal to the line potential).

Equipotential operation During the operation of the intelligent equipotential operation equipment, arc discharge will be generated, which will interfere with the normal operation of the intelligent equipotential operation equipment. Potential work to see if it works, but the manufacturer lacks this environment and it is difficult to achieve. The next step is to use the simulation method to realize the environment, as far as possible to be consistent with the actual working conditions of the intelligent equipotential operation equipment. The simple method is to shorten the wire and reduce the height, so that it can be tested in the laboratory. The voltage of the actual line is consistent, and then the gap (distance) between the intelligent equipotential operation equipment and the wire can be adjusted to change the intensity of the discharge.

However, when the line voltage to be operated by the intelligent equipotential operation equipment is very high, it is difficult for the laboratory to generate such a high voltage, and the voltage is high, the cost of the transformer is high, and the control of the test process is more complicated. The method of voltage and unadjusted gap (distance between intelligent equipotential operation equipment and line) shall be tested. When the voltage decreases, the discharge current will decrease. In order to keep the current unchanged, an adjustable capacitor is connected between the intelligent equipotential operation equipment and the ground, so that the adjustment of the capacitor can change the current, so as to achieve the same current as the actual environment. Of course, after adding the adjustable capacitor, the current of the transformer will increase, and the corresponding capacity will also increase. As for how to adjust the capacitance through the current, it needs to be determined by the fitting formula. As long as the working voltage and size of the intelligent equipotential operation equipment (mainly calculating the capacitance to ground) is known, it can be obtained according to the formula. the current. After determining this current, select a test voltage (20-50kV) value, which can be selected at will, as long as it is a certain value, but preferably close to 50kV, and then the adjustable capacitance can be obtained according to the calculation formula of the adjustable capacitance. capacitance value. The device of the present invention can reduce the voltage of the test transformer and save the test cost by increasing the adjustable capacitance.

FIG. 3 is a flow chart of a method 300 for testing the immunity to induced discharge of an intelligent equipotential working device according to an embodiment of the present invention. As shown in FIG. 3 , the method 300 for testing the inductive discharge immunity of intelligent equipotential work equipment provided by the embodiment of the present invention is implemented based on the device for testing the inductive discharge immunity of intelligent equipotential work equipment as shown in FIG. 2 . The method starts from step 301, where the first arc discharge currents of different sizes of intelligent equipotential working equipment under different conditions of ground capacitance, arc length and working voltage are obtained.

In the present invention, the induction discharge model of the intelligent equipotential operation equipment is established based on the existing induction discharge immunity test device. The intelligent equipotential operation equipment adopts the equipotential operation method. The intelligent equipotential operation equipment gradually moves from the ground potential or the intermediate potential to the high-voltage conductor. Under the action of the electric field of the high-voltage transmission line, the metal part of the intelligent equipotential operation equipment induces electric charge, and the potential gradually increases . The capacitance to ground of the intelligent equipotential operation equipment is C ₁₁ , the mutual capacitance between the intelligent equipotential operation equipment and the wire is C ₁₂ , and the voltage between the wire and the intelligent equipotential operation equipment is:

，

,

Among them, U _P is the working voltage of the intelligent equipotential operation equipment, that is, the phase voltage of the conductor.

Most of the working parts of the intelligent equipotential work equipment have a tip, and the air gap between it and the wire is an extremely uneven electric field air gap. When U ₁₂ exceeds the breakdown strength of the air gap, the wire and the smart equipotential work equipment Arc discharge occurs, as shown in Figure 4(b); the circuit for arc discharge during arcing is shown in Figure 4(c). The intelligent equipotential working equipment can be equivalent to a circuit composed of inductors _LR , _{RR , CR ,} and C ₁₁ . When the arc burns, the intelligent equipotential operation equipment and the wire are close to the equipotential, and the discharge stops. At this time, there is still an air gap between the intelligent equipotential operation equipment and the wire. The intelligent equipotential operation equipment induces electric charge, and the potential is determined by Fig. 4(a). Then arc. This process is repeated until the contact between the intelligent equipotential working device and the conductor reaches the equipotential.

The arc discharge current of the intelligent equipotential operation equipment during AC induction discharge is essentially due to the charge transfer between the wire and the intelligent equipotential operation equipment. , therefore, in order to determine the relationship between arc discharge current and ground potential, arc length and working voltage, it is necessary to obtain the first arc of different sizes of intelligent equipotential equipment under different ground capacitance, arc length and working voltage conditions. Discharge current.

In the present invention, the existing arc discharge current measurement method is used to measure the first arc discharge current of different sizes of intelligent equipotential operation equipment under different ground capacitance, arc length and working voltage conditions. For example, multiple sets of data are obtained as {30pF, 3mm, 10kV, 28.6A}{40pF, 6mm, 20kV, 37.5A}{50pF, 12mm, 40kV, 61,1A}{60pF, 15mm, 50kV, 77.3A}, where , and the elements in each group of data are capacitance to ground, arc length, working voltage, and first arc discharge current.

In the present invention, since the intelligent equipotential working equipment has an irregular shape, the finite element method is used to calculate the capacitance to ground, that is, the metal part model of the intelligent equipotential working equipment is established in the finite element software, and then the mesh is divided to calculate The ground capacitance of each grid, and then calculate the overall ground capacitance of the intelligent equipotential operation equipment according to the ground capacitance of each grid.

Among them, the capacitance to ground of each grid is calculated based on the principle shown in FIG. 5 . As shown in Figure 5, the calculation formula of the capacitance to ground of the metal ball is:

，

,

At that time, the formula for capacitance to ground was:

，

,

为智能等电位作业设备的对地电容；h为智能等电位作业设备的中心点与地的距离；r为智能等电位作业设备的等效半径；

为空气的介电常数。in,

is the capacitance to ground of the intelligent equipotential operation equipment; h is the distance between the center point of the intelligent equipotential operation equipment and the ground; r is the equivalent radius of the intelligent equipotential operation equipment;

is the dielectric constant of air.

It can be seen from this that the capacitance to ground of the metal ball is related to its height h to the ground and its own radius r.

In the present invention, although the shape of the intelligent equipotential working equipment is irregular, the principle is the same as the above. For objects with irregular shapes to find the capacitance to ground, a numerical algorithm is generally used, and the finite element method is commonly used. The ground-to-ground capacitance of the intelligent equipotential equipment is related to its ground-to-ground height h and its own size.

In step 302, fitting is performed according to the obtained first arc discharge currents of different sizes of intelligent equipotential equipment under different conditions of ground capacitance, arc length and working voltage to determine an arc discharge current fitting formula.

Preferably, wherein the arc discharge current fitting formula includes:

，

,

为电弧放电电流；

为智能等电位作业设备的对地电容；d为电弧长度；

为智能等电位作业设备的工作电压；

均为拟合系数。in,

is the arc discharge current;

is the ground capacitance of the intelligent equipotential equipment; d is the arc length;

It is the working voltage of the intelligent equipotential working equipment;

are fitting coefficients.

In the present invention, through the analysis of multiple test results, it is determined that there is a bi-exponential relationship between the magnitude of the arc discharge current and the arc length. The arc length and the first arc discharge current under the working voltage are fitted to determine the formula:

，

,

为电弧放电电流；

为智能等电位作业设备的对地电容；d为电弧长度，也就是智能等电位作业设备与导线之间的距离，当然这个距离是有范围的，比较小；

为智能等电位作业设备的工作电压，也是导线的相电压；

均为拟合系数。in,

is the arc discharge current;

It is the ground capacitance of the intelligent equipotential operation equipment; d is the arc length, that is, the distance between the intelligent equipotential operation equipment and the wire, of course, this distance has a range and is relatively small;

It is the working voltage of the intelligent equipotential operation equipment and the phase voltage of the conductor;

are fitting coefficients.

In the present invention, the values of the fitting coefficients after fitting are shown in Table 1.

Table 1 Fitting coefficient table

Statistics Numerical value β₀ 20.1410 Β₁ 0.08380 β₂ 0.0840 β₃ 25.8040

In step 303, according to the arc discharge current fitting formula, calculate the second arc discharge current of the target intelligent equipotential operation equipment under the conditions of a preset working voltage, different capacitances to ground and different arc lengths.

In the present invention, the range of capacitance to ground, the range of arc length and the working voltage are determined according to the environment in which the target intelligent equipotential operation equipment needs to work. Then, according to the fitting formula, calculate the second arc discharge current under the conditions of the same working voltage but different capacitances to ground and different arc lengths.

In step 304, according to the maximum second arc discharge current and the preset voltage output by the test transformer, calculate the first capacitance of the adjustable capacitance in the inductive discharge immunity test device.

Preferably, the calculation of the first capacitance of the adjustable capacitance in the inductive discharge immunity test device according to the maximum second arc discharge current and the preset voltage output by the test transformer includes:

，

,

为可调电容的第一电容；

为试验变压器输出的预设电压；

为最大的第二电弧放电电流；j表示是复数；

为角频率。in,

is the first capacitor of the adjustable capacitor;

is the preset voltage output by the test transformer;

is the largest second arc discharge current; j represents a complex number;

is the angular frequency.

The intelligent equipotential operation equipment and tools move to the wire at a certain distance until they touch the wire. This process is called incoming equipotentiality, and the opposite process is called outgoing equipotentiality. During these two processes, arcing will be generated, resulting in electromagnetic interference. The magnitude of this disturbance is mainly measured by the magnitude of the arc discharge current. The purpose of the present invention is to evaluate the anti-interference ability of intelligent equipotential operation equipment and tools when entering and leaving equipotential.

Therefore, in the present invention, after the second arc discharge current is determined, the first capacitance of the adjustable capacitor is calculated according to the maximum second arc discharge current to test according to the first capacitance.

In step 305, use the inductive discharge immunity test device to perform an inductive discharge immunity test according to the first capacitor and the preset voltage, obtain the working state of the target intelligent equipotential operation equipment, and perform the inductive discharge immunity test according to the first capacitor and the preset voltage. The working state of the target intelligent equipotential working equipment determines the inductive discharge immunity of the target intelligent equipotential working equipment.

Preferably, the determination of the inductive discharge immunity of the target intelligent equipotential equipment according to the working state of the target intelligent equipotential equipment includes:

If the working state of the intelligent equipotential working equipment is a normal state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the first level;

If the working state of the intelligent equipotential bonding equipment is reduced in performance and can return to a normal state after removing the interference, then determine that the inductive discharge immunity of the target smart equipotential bonding equipment is at the second level;

If the working state of the intelligent equipotential bonding equipment is reduced in performance and cannot be restored to a normal state after removing the interference, it is determined that the inductive discharge immunity of the target smart equipotential bonding equipment is at the third level;

If the working state of the intelligent equipotential working equipment is in an inoperable state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the fourth level.

Preferably, wherein the method further comprises:

Adjust the output voltage of the test transformer and the capacitance value of the adjustable capacitor by using a voltage and capacitance control device.

Preferably, wherein the method further comprises:

Use a voltage divider to divide the high-voltage signal output by the test transformer into a low-voltage signal;

Using the voltage-capacitance control device, the high-voltage signal output by the test transformer is calibrated according to the low-voltage signal, so that the voltage of the high-voltage signal output by the test transformer is the preset voltage.

In the present invention, the test is performed using the inductive discharge immunity test device shown in FIG. 2 . Among them, the reference ground plane is well connected to the earth, the output voltage of the test transformer is 50kV, the capacity is not less than 200kVA, the actual output will be adjustable between 0-50kV, 50kV is the best choice for testing, or 20-50kV, but low Can not discharge at 10kV. After the first capacitor is determined, the intelligent equipotential operation equipment is placed on the adjustable capacitor, the output voltage of the test transformer is adjusted by the voltage regulator to the preset voltage, and the size of the variable capacitor is adjusted by the console to be the value of the adjustable capacitor. The first capacitor is used to test the anti-disturbance ability of induction discharge, and determine the anti-disturbance ability of inductive discharge of the target intelligent equipotential operation equipment according to the working state of the target intelligent equipotential operation equipment. The principle of using the device of the present invention for testing is shown in FIG. 6 . The difference from FIG. 4 is that an adjustable capacitor is added, which can reduce the voltage of the test transformer and save the test cost.

Generally, the immunity of electromagnetic compatibility or electromagnetic interference is divided into 4 levels, including: the first level: no effect, normal operation; the second level: the performance is reduced, and it can return to normal work after the interference is removed; the third level: the performance If it is lowered, it cannot be restored, and it needs to be restored after manual participation; the fourth level: damaged, cannot continue to work.

Therefore, in the present invention, if the working state of the intelligent equipotential work equipment is in the normal state, it is determined that the inductive discharge immunity of the target intelligent equipotential work equipment is at the first level; The working state of the equipment is that the performance is reduced and can be restored to the normal state after removing the interference, then it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the second level; if the working state of the intelligent equipotential working equipment is If the performance is degraded and the normal state cannot be restored after removing the interference, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the third level; It is determined that the inductive discharge immunity of the target intelligent equipotential operation equipment is at the fourth level.

The method for testing the inductive discharge immunity capability of the intelligent live working equipment of the present invention can provide a solution for the current intelligent equipotential working equipment lacking inductive discharge electromagnetic interference detection, and ensure that the intelligent equipotential working equipment and tools are not affected by electromagnetic interference in practical applications. The interference problem leads to its misoperation, refusal to move or even damage. At the same time, it does not need a high-voltage level test transformer and an insulating lifting platform, and the operation is simple and convenient. The method of the invention is used to test the inductive discharge immunity of intelligent equipotential operation equipment and tools. , the verified intelligent equipotential operation equipment will not appear electromagnetic interference when the line is operated at the corresponding voltage level.

FIG. 7 is a schematic structural diagram of an inductive discharge immunity testing system 700 of an intelligent equipotential working device according to an embodiment of the present invention. As shown in FIG. 7 , an induction discharge immunity test system 700 of an intelligent equipotential operation equipment provided by an embodiment of the present invention includes: a first arc discharge current acquisition unit 701 , a fitting unit 702 , and a second arc discharge current calculation unit 703 , a first capacitance calculation unit 704 and a test unit 705 .

Preferably, the first arc discharge current obtaining unit 701 is configured to obtain the first arc discharge current of different sizes of intelligent equipotential working equipment under different conditions of ground capacitance, arc length and working voltage.

Preferably, the fitting unit 702 is configured to perform fitting according to the acquired first arc discharge currents of different sizes of intelligent equipotential equipment under different conditions of ground capacitance, arc length and working voltage, so as to determine the arc Discharge current fitting formula.

Preferably, in the fitting unit 702, the arc discharge current fitting formula includes:

，

,

为电弧放电电流；

为智能等电位作业设备的对地电容；d为电弧长度；

为智能等电位作业设备的工作电压；

均为拟合系数。in,

is the arc discharge current;

is the ground capacitance of the intelligent equipotential equipment; d is the arc length;

It is the working voltage of the intelligent equipotential working equipment;

are fitting coefficients.

Preferably, the second arc discharge current calculation unit 703 is configured to calculate, according to the arc discharge current fitting formula, that the target intelligent equipotential operation equipment is at a preset working voltage, different capacitances to ground and different arc lengths The second arc discharge current under the condition.

Preferably, the first capacitance calculation unit 704 is configured to calculate the first capacitance of the adjustable capacitance in the inductive discharge immunity test device according to the maximum second arc discharge current and the preset voltage output by the test transformer.

Preferably, the first capacitance calculation unit 704 calculates the first capacitance of the adjustable capacitance in the inductive discharge immunity test device according to the maximum second arc discharge current and the preset voltage output by the test transformer, including:

，

,

为可调电容的第一电容；

为试验变压器输出的预设电压；

为最大的第二电弧放电电流；j表示是复数；

为角频率。in,

is the first capacitor of the adjustable capacitor;

is the preset voltage output by the test transformer;

is the largest second arc discharge current; j represents a complex number;

is the angular frequency.

Preferably, the testing unit 705 is configured to use the inductive discharge immunity test device to perform an inductive discharge immunity test according to the first capacitance and the preset voltage, and obtain the The working state of the target intelligent equipotential operation equipment is determined, and the inductive discharge immunity of the target intelligent equipotential equipment is determined according to the working state of the target intelligent equipotential equipment.

Preferably, the testing unit 705 determines the inductive discharge immunity capability of the target intelligent equipotential equipment according to the working state of the target intelligent equipotential equipment, including:

If the working state of the intelligent equipotential working equipment is a normal state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the first level;

If the working state of the intelligent equipotential bonding equipment is reduced in performance and can return to a normal state after removing the interference, then determine that the inductive discharge immunity of the target smart equipotential bonding equipment is at the second level;

If the working state of the intelligent equipotential bonding equipment is reduced in performance and cannot be restored to a normal state after removing the interference, it is determined that the inductive discharge immunity of the target smart equipotential bonding equipment is at the third level;

If the working state of the intelligent equipotential working equipment is in an inoperable state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the fourth level.

Preferably, wherein the system further comprises:

The adjusting unit is used for adjusting the voltage output by the test transformer and the capacitance value of the adjustable capacitor by using the voltage and capacitance control device.

Preferably, wherein the system further comprises:

A signal calibration unit for dividing the high voltage signal output by the test transformer into a low voltage signal by using a voltage divider, and using the voltage capacitance control device to calibrate the high voltage signal output by the test transformer according to the low voltage signal , so that the voltage at which the test transformer outputs the high-voltage signal is the preset voltage.

The inductive discharge immunity test system 700 of the smart equipotential work equipment according to the embodiment of the present invention corresponds to the induction discharge immunity test method 300 of the smart equipotential work equipment according to another embodiment of the present invention, which is not repeated here. Repeat.

The present invention has been described with reference to a few embodiments. However, as is known to those skilled in the art, other embodiments than the above disclosed invention are equally within the scope of the invention, as defined by the appended patent claims.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/the/the [means, component, etc.]" are open to interpretation as at least one instance of said means, component, etc., unless expressly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowcharts and/or block diagrams, and combinations of flows and/or blocks in the flowcharts and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in one or more of the flowcharts and/or one or more blocks of the block diagrams.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions An apparatus implements the functions specified in a flow or flows of the flowcharts and/or a block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in one or more of the flowcharts and/or one or more blocks of the block diagrams.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications or equivalent replacements are made to the specific embodiments of the present invention, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (15)

1. an inductive discharge immunity testing device of intelligent equipotential operation equipment, is characterized in that, described device comprises: voltage and capacitance control equipment, test transformer, insulating support, adjustable capacitance and insulating base; Wherein, The voltage and capacitance control equipment is respectively connected with the test transformer and the adjustable capacitor, and is used to control the high-voltage signal output by the test transformer and the capacitance value of the adjustable capacitor; the test transformer is connected to the bus bar, and is used for outputting the high-voltage signal to the bus bar, so that the bus bar and the intelligent equipotential working equipment generate an arc; the insulating support column is connected with the bus bar and is used for supporting the bus bar; The insulating base is used to keep the intelligent equipotential operation equipment in a floating potential state; The adjustable capacitor is connected with the intelligent equipotential operation equipment, and the arc discharge current is adjusted by controlling the capacitance value of the adjustable capacitor. 2. The device according to claim 1, wherein the device further comprises: a voltage divider, which is respectively connected to the test transformer and the voltage and capacitance control equipment, and is used to divide the high voltage signal output by the test transformer into a low voltage signal, and input the low voltage signal to the voltage and capacitance control equipment, So that the voltage-capacitance control device calibrates the high-voltage signal output by the test transformer according to the low-voltage signal. 3. The device of claim 1, further comprising: a conductor adjustment device and a conductor; wherein, The conductor is connected with the busbar, and the busbar generates an arc with the intelligent equipotential operation equipment through the conductor; The conductor adjusting device is placed on the insulating support and is used for adjusting the arc length between the conductor and the intelligent equipotential working equipment. 4. A method for testing the inductive discharge immunity of intelligent equipotential operation equipment, wherein the method comprises: Obtain the first arc discharge current of different sizes of intelligent equipotential operation equipment under different conditions of ground capacitance, arc length and working voltage; According to the obtained first arc discharge currents of different sizes of intelligent equipotential operation equipment under different ground capacitance, arc length and working voltage conditions, the arc discharge current fitting formula is determined; According to the arc discharge current fitting formula, calculate the second arc discharge current of the target intelligent equipotential operation equipment under the conditions of preset working voltage, different capacitances to ground and different arc lengths; According to the maximum second arc discharge current and the preset voltage output by the test transformer, calculate the first capacitance of the adjustable capacitor in the inductive discharge immunity test device; Using the inductive discharge immunity test device, the inductive discharge immunity test is carried out according to the first capacitor and the preset voltage, and the working state of the target intelligent equipotential operation equipment is obtained, and the target intelligent equipotential The working state of the working equipment determines the inductive discharge immunity of the target intelligent equipotential working equipment. 5. The method according to claim 4, wherein the arc discharge current fitting formula comprises:

, in,

is the arc discharge current;

is the ground capacitance of the intelligent equipotential equipment; d is the arc length;

It is the working voltage of the intelligent equipotential working equipment;

are fitting coefficients. 6 . The method according to claim 4 , wherein the first capacitance of the adjustable capacitance in the inductive discharge immunity test device is calculated according to the maximum second arc discharge current and the preset voltage output by the test transformer. 7 . ,include:

, in,

is the first capacitor of the adjustable capacitor;

is the preset voltage output by the test transformer;

is the largest second arc discharge current; j represents a complex number;

is the angular frequency. 7 . The method according to claim 4 , wherein determining the inductive discharge immunity capability of the target intelligent equipotential equipment according to the working state of the target intelligent equipotential equipment comprises: 8 . If the working state of the intelligent equipotential working equipment is a normal state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the first level; If the working state of the intelligent equipotential bonding equipment is reduced in performance and can return to a normal state after removing the interference, then determine that the inductive discharge immunity of the target smart equipotential bonding equipment is at the second level; If the working state of the intelligent equipotential bonding equipment is reduced in performance and cannot be restored to a normal state after removing the interference, it is determined that the inductive discharge immunity of the target smart equipotential bonding equipment is at the third level; If the working state of the intelligent equipotential working equipment is in an inoperable state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the fourth level. 8. The method according to claim 4, wherein the method further comprises: The preset voltage output by the test transformer and the capacitance value of the adjustable capacitor are adjusted by using a voltage-capacitance control device. 9. The method according to claim 8, wherein the method further comprises: Use a voltage divider to divide the high-voltage signal output by the test transformer into a low-voltage signal; Using the voltage-capacitance control device, the high-voltage signal output by the test transformer is calibrated according to the low-voltage signal, so that the voltage of the high-voltage signal output by the test transformer is the preset voltage. 10. An inductive discharge immunity test system for intelligent equipotential operation equipment, characterized in that the system comprises: a first arc discharge current acquisition unit, used for acquiring the first arc discharge current of different sizes of intelligent equipotential operation equipment under different conditions of ground capacitance, arc length and working voltage; The fitting unit is used for fitting according to the obtained first arc discharge currents of different sizes of intelligent equipotential equipment under different conditions of ground capacitance, arc length and working voltage, so as to determine the arc discharge current fitting formula; The second arc discharge current calculation unit is configured to calculate, according to the arc discharge current fitting formula, the second arc of the target intelligent equipotential operation equipment under the conditions of a preset working voltage, different capacitances to ground and different arc lengths Discharge current; a first capacitance calculation unit, configured to calculate the first capacitance of the adjustable capacitance in the inductive discharge immunity test device according to the maximum second arc discharge current and the preset voltage output by the test transformer; The test unit is used for using the inductive discharge immunity test device to perform an inductive discharge immunity test according to the first capacitor and the preset voltage, to obtain the working state of the target intelligent equipotential operation equipment, and according to the The working state of the target intelligent equipotential working equipment determines the inductive discharge immunity of the target intelligent equipotential working equipment. 11. The system according to claim 10, wherein, in the fitting unit, the arc discharge current fitting formula comprises:

, in,

is the arc discharge current;

is the ground capacitance of the intelligent equipotential equipment; d is the arc length;

It is the working voltage of the intelligent equipotential working equipment;

are fitting coefficients. 12 . The system according to claim 10 , wherein the first capacitance calculation unit calculates, according to the maximum second arc discharge current and the preset voltage output by the test transformer, the available parameters in the inductive discharge immunity test device. 13 . The first capacitor of the tuning capacitor, including:

, in,

is the first capacitor of the adjustable capacitor;

is the preset voltage output by the test transformer;

is the largest second arc discharge current; j represents a complex number;

is the angular frequency. 13. The system according to claim 10, wherein the test unit determines the inductive discharge immunity capability of the target intelligent equipotential equipment according to the working state of the target intelligent equipotential equipment, comprising: If the working state of the intelligent equipotential working equipment is a normal state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the first level; If the working state of the intelligent equipotential bonding equipment is reduced in performance and can return to a normal state after removing the interference, then determine that the inductive discharge immunity of the target smart equipotential bonding equipment is at the second level; If the working state of the intelligent equipotential bonding equipment is reduced in performance and cannot be restored to a normal state after removing the interference, it is determined that the inductive discharge immunity of the target smart equipotential bonding equipment is at the third level; If the working state of the intelligent equipotential working equipment is in an inoperable state, it is determined that the inductive discharge immunity of the target intelligent equipotential working equipment is at the fourth level. 14. The system of claim 10, wherein the system further comprises: The adjusting unit is used for adjusting the voltage output by the test transformer and the capacitance value of the adjustable capacitor by using the voltage and capacitance control device. 15. The system of claim 14, wherein the system further comprises: A signal calibration unit for dividing the high voltage signal output by the test transformer into a low voltage signal by using a voltage divider, and using the voltage capacitance control device to calibrate the high voltage signal output by the test transformer according to the low voltage signal , so that the voltage at which the test transformer outputs the high-voltage signal is the preset voltage.

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