Non-uniform configuration resistor voltage dividing device based on distribution parameter optimization and design method

Abstract

The invention relates to a non-uniform configuration resistance voltage dividing device based on distribution parameter optimization and a design method, a first metal flange and a second metal flange are respectively arranged at the top end and the bottom end of an epoxy cylinder, a high-voltage arm and a low-voltage arm are both accommodated in the epoxy cylinder, the high-voltage arm is electrically connected with the low-voltage arm, and the high-voltage arm is electrically connected with the low-voltage arm. The high-voltage arm is electrically connected with the first metal flange through a metal connecting piece, and the low-voltage arm is electrically connected with the second metal flange; both the high-voltage arm and the low-voltage arm adopt inner and outer double-layer shielding structures, and both the high-voltage arm and the low-voltage arm adopt non-uniform double-layer reverse winding structures; the design process is as follows: a high-voltage arm and a low-voltage arm both adopt an inner-outer double-layer shielding structure; an inner-layer measuring resistor branch and an outer-layer shielding resistor branch both adopt N-section resistors; the high-voltage arm and the low-voltage arm both adopt a non-uniform double-layer reverse winding structure; through the arrangement, the capacitance and inductance parameters can be flexibly adjusted, so that the measurement precision of the impact transient high voltage is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of voltage measurement, and in particular to a non-uniform resistor voltage divider device based on distributed parameter optimization and a design method thereof. Background Art

[0002] At present, with the vigorous construction of new power systems, the access of new energy sources such as photovoltaics and wind power to the power grid is becoming more and more common. Since new energy sources such as photovoltaics and wind power have obvious randomness, volatility and intermittent characteristics, they are prone to cause transient mutations and high-frequency oscillations in system voltage. Enhance the independent controllability of national metrology standards and comprehensively improve the country's highest measurement capabilities. However, the national standard for impulse voltages of voltage levels of 1200kV and above has not yet been established, and there is a lack of recognized high-precision 1200kV impulse voltage measurement devices. There is no basis for the traceability and transfer of the value of UHV impulse voltage, resulting in uneven impulse voltage measurement levels in my country. Therefore, it is urgent to carry out research on high-precision measurement technology for impulse high voltage, develop impulse standard measurement devices, and improve the measurement technology level of impulse transient voltages in power systems and other fields.

[0003] The impulse voltage can be obtained through contact and non-contact measurement methods. Non-contact measurement is achieved through electric field measurement, and the measurement accuracy is not high. For contact measurement methods, the commonly used impulse voltage measurement devices are resistor voltage dividers, capacitor voltage dividers, and resistor-capacitor voltage dividers. Capacitor voltage dividers are generally suitable for measuring power frequency signals and can measure high-frequency signals. The scale factor is much less affected by heat than resistor voltage dividers, but capacitor voltage dividers are affected by their own resistance and capacitance parameters, and their dynamic characteristics are worse than resistor voltage dividers. Resistor-capacitor voltage dividers combine the advantages of resistor voltage dividers and capacitor voltage dividers, and can achieve consistency of scale factors at low and high frequencies, and measure high-amplitude voltages. However, resistor-capacitor voltage dividers have strict requirements on resistance and capacitance parameters, resulting in large oscillations in the response of resistor-capacitor voltage dividers in actual situations. Therefore, resistor voltage dividers are used as standard impulse measurement devices.

[0004] Commonly used resistor dividers, the high-voltage arm resistor is made of resistor wire wound around a winding rod, which is evenly distributed, the resistor wire radius is equal everywhere, the turn-to-turn distance is the same, and the winding rod diameter is equal everywhere. There is no difference in the winding method of the high-voltage arm resistor wire from top to bottom. This winding method brings many problems, namely, first, the stray capacitance of each section of the high-voltage arm resistor from top to bottom is only related to the distance of each part to the ground, and has little to do with each section of the resistor wire itself; second, the inductance of each section of the high-voltage arm resistor is equal, and there is no room for flexible adjustment of the parameter size; third, the turn-to-turn capacitance of the high-voltage arm resistor is equal everywhere, and there is also no flexible adjustment range for the parameter size.

[0005] Commonly used impulse resistor dividers are mostly made of evenly distributed resistance wire. There is no difference in the winding method of the high-voltage arm resistance wire from top to bottom. There is a lack of flexible adjustment space for the capacitance and inductance parameters, making it difficult to achieve high-precision measurement under optimal distributed parameters. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a non-uniform configuration resistor voltage divider device and design method based on distributed parameter optimization, which has the advantage of being able to adjust the size of capacitance and inductance parameters, thereby improving the measurement accuracy of impulse transient high voltage.

[0007] The above-mentioned inventive object of the present invention is achieved through the following technical solutions: On the one hand, the present invention provides a non-uniform configuration resistor voltage divider device based on distributed parameter optimization, including a high-voltage arm, a low-voltage arm, an epoxy cylinder, a first metal flange and a second metal flange; the first metal flange and the second metal flange are respectively arranged at the top and bottom ends of the epoxy cylinder, the high-voltage arm and the low-voltage arm are both accommodated in the epoxy cylinder, the high-voltage arm and the low-voltage arm are arranged in sequence from top to bottom along the center line direction of the epoxy cylinder, the high-voltage arm is electrically connected to the low-voltage arm, the high-voltage arm is electrically connected to the first metal flange through a metal connector, and the low-voltage arm is electrically connected to the second metal flange; the high-voltage arm and the low-voltage arm both adopt an inner and outer double-layer shielding structure, and the high-voltage arm and the low-voltage arm both adopt a non-uniform double-layer reverse winding structure.

[0008] Preferably, in the non-uniform configuration resistor voltage divider device based on distributed parameter optimization provided by the present invention, the high-voltage arm comprises an inner layer measuring resistor branch and an outer layer shielding resistor branch, the inner layer measuring resistor branch is inserted in the outer layer shielding resistor branch, and the inner layer measuring resistor branch and the outer layer shielding resistor branch are both N-section resistors, wherein N is a natural number greater than or equal to 10 and less than or equal to 1;

[0009] The resistance value of the outer shielding resistance branch at the corresponding height is m times the resistance value of the inner measuring resistance branch, that is;

[0010]

[0011] Wherein, R1, R2, R3, R4, and R5 are the resistance values ​​of the inner measuring resistance branch of the high voltage arm; R1', R2', R3', R4', and R5' are the resistance values ​​of the outer shielding resistance branch of the high voltage arm.

[0012] Preferably, in the non-uniform configuration resistor voltage divider device based on distributed parameter optimization provided by the present invention, the inner measuring resistor branch and the outer shielding resistor branch both use a non-uniform double layer of resistance wire wound back on the outer peripheral wall of a hollow epoxy resin winding rod, wherein the number of sections of the hollow epoxy resin winding rod is set corresponding to the number of sections of the resistor.

[0013] Preferably, in the non-uniform configuration resistor voltage divider device based on distributed parameter optimization provided by the present invention, the low-voltage arm includes a low-voltage arm measuring resistor and a low-voltage arm shielding resistor, the low-voltage arm measuring resistor is inserted in the low-voltage arm shielding resistor, the low-voltage arm measuring resistor is electrically connected to the inner layer measuring resistor branch, the low-voltage arm shielding resistor is electrically connected to the outer layer shielding resistor branch, and the low-voltage arm measuring resistor and the low-voltage arm shielding resistor are both electrically connected to the second metal flange;

[0014] The low-voltage arm measurement resistance and the low-voltage arm shielding resistance satisfy the following relationship:

[0015]

[0016] Where r is the low voltage arm measurement resistance; r' is the low voltage arm shielding resistance; R0 is the matching resistance; R x is the load resistance.

[0017] Preferably, in the non-uniform configuration resistor voltage divider device based on distributed parameter optimization provided by the present invention, the low voltage arm measuring resistor and the low voltage arm shielding resistor are both made of resistance wire wound in a non-uniform double layer on the outer peripheral wall of a hollow epoxy resin winding rod.

[0018] Preferably, the non-uniform resistor voltage divider device based on distributed parameter optimization provided by the present invention, when the resistance value of each resistor section of the inner layer measurement resistor branch meets R n =5.37e -0.14n +0.24e -0.26n When (n=1, 2, ..., 10), the distributed parameters of the measurement loop composed of the ground capacitance of each resistor section of the inner layer measurement resistance branch and the inductance of each inner layer measurement resistance branch make the stabilization time of the step wave response the shortest.

[0019] Preferably, the non-uniform configuration resistor voltage divider device based on distributed parameter optimization provided by the present invention has a non-uniform double-layer reverse winding structure that satisfies the requirements that the number of turns of resistors in different sections is different; the turn spacing of the resistor wire wound in a single section is different; the turn spacing of the resistors in the N sections of the high-voltage arm gradually increases from top to bottom; the resistance value of each section of the resistor in the inner layer measurement resistor branch satisfies R n =5.37e -0.14n +0.24e -0.26n (n=1,2,...,10).

[0020] Preferably, in the non-uniform configuration resistor voltage divider device based on distribution parameter optimization provided by the present invention, the epoxy cylinder is made of epoxy resin.

[0021] Preferably, the non-uniform configuration resistor voltage divider device based on distributed parameter optimization provided by the present invention, the low-voltage arm also includes an upper cover plate, a shielding tube, a first low-voltage arm connecting plate and a second low-voltage arm connecting plate, the upper cover plate is covered on the top of the shielding tube, the upper cover plate is connected to the top of the shielding tube by screws, the low-voltage arm measuring resistor, the low-voltage arm shielding resistor, the first low-voltage arm connecting plate and the second low-voltage arm connecting plate are all located in the shielding tube, the low-voltage arm measuring resistor and the low-voltage arm shielding resistor are both located between the first low-voltage arm connecting plate and the second low-voltage arm connecting plate, the top ends of the low-voltage arm measuring resistor and the low-voltage arm shielding resistor are both connected to the first low-voltage arm connecting plate, and the bottom ends of the low-voltage arm measuring resistor and the low-voltage arm shielding resistor are both connected to the second low-voltage arm connecting plate; the top end of the low-voltage arm measuring resistor is connected to the measuring cable head of an external measuring instrument through a copper wire, and the second metal flange is grounded.

[0022] On the other hand, the present invention provides a design method of a non-uniform resistor voltage divider device based on distributed parameter optimization as described above, comprising the following steps:

[0023] The high-voltage arm and the low-voltage arm both adopt an inner and outer double-layer shielding structure, and the resistance value of the outer shielding resistance branch of the high-voltage arm at a corresponding height is m times the resistance value of the inner measuring resistance branch of the high-voltage arm;

[0024] The inner layer measurement resistance branch and the outer layer shielding resistance branch are both N-section resistors, where N is a natural number greater than or equal to 10 and less than or equal to 1;

[0025] The high-voltage arm and the low-voltage arm both adopt a non-uniform double-layer reverse winding structure, and the non-uniform double-layer reverse winding structure satisfies that the number of turns of resistors in different sections is different; the turn spacing of the resistor wire wound by a single section of resistor is different; the turn spacing of the resistors of the N sections of the high-voltage arm gradually increases from top to bottom; the resistance value of each section of the resistor of the inner layer measurement resistor branch of the high-voltage arm satisfies R n =5.37e -0.14n +0.24e -0.26n (n=1,2,...,10).

[0026] In summary, the beneficial technical effects of the present invention are as follows: the non-uniform configuration resistor voltage divider device and design method based on distributed parameter optimization provided by the present application, wherein the non-uniform configuration resistor voltage divider device based on distributed parameter optimization includes a high-voltage arm, a low-voltage arm, an epoxy cylinder, a first metal flange and a second metal flange; the first metal flange and the second metal flange are respectively arranged at the top and the bottom of the epoxy cylinder, the high-voltage arm and the low-voltage arm are both accommodated in the epoxy cylinder, the high-voltage arm and the low-voltage arm are arranged in sequence from top to bottom along the center line direction of the epoxy cylinder, the high-voltage arm is electrically connected to the low-voltage arm, and the high-voltage arm is electrically connected to the first metal flange through a metal connector, The low-voltage arm is electrically connected to the second metal flange; both the high-voltage arm and the low-voltage arm adopt an inner and outer double-layer shielding structure, and both the high-voltage arm and the low-voltage arm adopt a non-uniform double-layer counter-winding structure; the design process is: both the high-voltage arm and the low-voltage arm adopt an inner and outer double-layer shielding structure - the inner layer measurement resistance branch and the outer layer shielding resistance branch are N-section resistances - both the high-voltage arm and the low-voltage arm adopt a non-uniform double-layer counter-winding structure; by setting the high-voltage arm and the low-voltage arm to adopt an inner and outer double-layer shielding structure, and both the high-voltage arm and the low-voltage arm adopt a non-uniform double-layer counter-winding structure, the size of the capacitance and inductance parameters can be flexibly adjusted, thereby improving the measurement accuracy of the impulse transient high voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a non-uniform resistor voltage divider device based on distributed parameter optimization provided by the first embodiment of the present invention.

[0028] Figure 2 4 is a circuit diagram of a non-uniform resistor voltage divider device based on distributed parameter optimization provided by the first embodiment of the present invention.

[0029] Figure 3 It is a schematic diagram of the working state of the non-uniform configuration resistor voltage divider device based on distributed parameter optimization provided by the first embodiment of the present invention.

[0030] Figure 4 It is a flow chart of a design method of a non-uniform resistor voltage divider device based on distributed parameter optimization provided by the second embodiment of the present invention.

[0031] In the figure, 1. non-uniform configuration resistor voltage divider; 10. high voltage arm; 11. inner layer measuring resistor branch; 111. inner layer hollow epoxy resin winding rod; 12. outer layer shielding resistor branch; 121. outer layer hollow epoxy resin winding rod; 20. low voltage arm; 21. low voltage arm measuring resistor; 22. low voltage arm shielding resistor; 23. upper cover; 24. shielding cylinder; 25. first low voltage arm connecting plate; 26. second low voltage arm connecting plate; 30. epoxy cylinder; 31. cylinder body; 32. first end cover; 33. second end cover; 40. first metal flange; 50. second metal flange; 60. metal connector; 2. measuring instrument; 201. measuring cable head; 202. copper wire; 3. voltage source; 4. equalizing ring. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0033] First embodiment:

[0034] Reference Figures 1 to 3 , a non-uniform configuration resistor voltage divider device 1 based on distributed parameter optimization disclosed in the first embodiment of the present invention, comprising a high voltage arm 10, a low voltage arm 20, an epoxy cylinder 30, a first metal flange 40 and a second metal flange 50; the first metal flange 40 and the second metal flange 50 are respectively arranged at the top and the bottom of the epoxy cylinder 30, the high voltage arm 10 and the low voltage arm 20 are both accommodated in the epoxy cylinder 30, the high voltage arm 10 and the low voltage arm 20 are arranged in sequence from top to bottom along the center line direction of the epoxy cylinder 30, the high voltage arm 10 is electrically connected to the low voltage arm 20, and the high voltage arm 10 is electrically connected to the low voltage arm 20. The arm 10 is electrically connected to the first metal flange 40 through the metal connector 60, and the low-voltage arm 20 is electrically connected to the second metal flange 50; the high-voltage arm 10 and the low-voltage arm 20 both adopt an inner and outer double-layer shielding structure, and the high-voltage arm 10 and the low-voltage arm 20 both adopt a non-uniform double-layer reverse winding structure; by setting the high-voltage arm 10 and the low-voltage arm 20 to adopt an inner and outer double-layer shielding structure, and the high-voltage arm 10 and the low-voltage arm 20 to adopt a non-uniform double-layer reverse winding structure, the capacitance and inductance parameters can be flexibly adjusted, thereby improving the measurement accuracy of impulse transient high voltage.

[0035] Among them, the epoxy cylinder 30 includes a cylinder body 31, a first end cover 32 and a second end cover 33. The first end cover 32 and the second end cover 33 are respectively covered on the top and bottom ends of the cylinder body 31. The end of the first end cover 32 facing away from the cylinder body 31 is connected to the bottom surface of the first metal flange 40 by screws, and the end of the second end cover 33 facing away from the cylinder body 31 is connected to the top surface of the second metal flange 50 by screws. The high-pressure arm 10 and the low-pressure arm 20 are both accommodated in the cylinder body 31.

[0036] Specifically, the bottom end of the metal connector 60 is inserted into the cylinder 31 and electrically connected to the high-voltage arm 10 through screws, and the top end of the metal connector 60 passes through the first end cover 32 and is electrically connected to the first metal flange 40 through spring contacts.

[0037] Exemplarily, the epoxy tube 30 may be made of epoxy resin. Of course, the epoxy tube 30 may also be made of other materials as long as the epoxy tube 30 is an insulator.

[0038] Furthermore, in this embodiment, the high-voltage arm 10 includes an inner measuring resistance branch 11 and an outer shielding resistance branch 12, the inner measuring resistance branch 11 is inserted in the outer shielding resistance branch 12, and the inner measuring resistance branch 11 and the outer shielding resistance branch 12 are both N-section resistors, where N is a natural number greater than or equal to 10 and less than or equal to 1.

[0039] like Figure 2 As shown, the inner layer measuring resistance branch 11 is connected in parallel with the outer layer shielding resistance branch 12, wherein the resistance value of the outer layer shielding resistance branch 12 at a corresponding height is m times the resistance value of the inner layer measuring resistance branch 11, that is, m is the ratio of the resistance diameter of the outer layer shielding resistance branch 12 to the resistance diameter of the inner layer measuring resistance branch 11, that is;

[0040]

[0041] Wherein, R1, R2, R3, R4, R5 are the resistance values ​​of the inner layer measuring resistance branch 11 of the high voltage arm 10; R1', R2', R3', R4', R5' are the resistance values ​​of the outer layer shielding resistance branch 12 of the high voltage arm 10.

[0042] It should be noted that Figure 2 In the figure, N=5, and actually 1≤N≤10, the number of resistance nodes of the inner layer measuring resistance branch 11 and the outer layer shielding resistance branch 12 is the same.

[0043] Continue to refer to Figure 1 In this embodiment, the inner measuring resistance branch 11 and the outer shielding resistance branch 12 both use a non-uniform double layer of resistance wire wound back on the outer peripheral wall of the hollow epoxy resin winding rod, wherein the number of sections of the hollow epoxy resin winding rod is set corresponding to the number of sections of the resistor.

[0044] Specifically, the outer hollow epoxy resin winding rod 121 adopts a hollow cylindrical insulating rod, and the outer shielding resistance branch 12 is formed by winding the resistance wire in forward and reverse directions on the surface of the outer hollow epoxy resin winding rod 121; the inner hollow epoxy resin winding rod 111 also adopts a hollow cylindrical insulating rod, and the inner measuring resistance branch 11 is formed by winding the resistance wire in forward and reverse directions on the surface of the inner hollow epoxy resin winding rod 111. The center line of the inner measuring resistance branch 11 and the center line of the outer shielding resistance branch 12 are both arranged parallel to the center line of the cylinder 31. In some feasible methods, the center line of the inner measuring resistance branch 11 and the center line of the outer shielding resistance branch 12 are both arranged colinearly with the center line of the cylinder 31.

[0045] It should be noted that the inner diameter of the outer hollow epoxy resin winding rod 121 is greater than the outer diameter of the inner hollow epoxy resin winding rod 111 .

[0046] The inner layer measuring resistance branch 11 and the outer layer shielding resistance branch 12 are both electrically connected to the bottom end of the metal connector 60 via screws.

[0047] Continue to refer to Figure 1 and Figure 2 In this embodiment, the low-voltage arm 20 includes a low-voltage arm measuring resistor 21 and a low-voltage arm shielding resistor 22. The low-voltage arm measuring resistor 21 is inserted into the low-voltage arm shielding resistor 22. The low-voltage arm measuring resistor 21 is electrically connected to the inner measuring resistor branch 11. The low-voltage arm shielding resistor 22 is electrically connected to the outer shielding resistor branch 12. The low-voltage arm measuring resistor 21 and the low-voltage arm shielding resistor 22 are both electrically connected to the second metal flange 50.

[0048] like Figure 2 As shown, the low-voltage arm measuring resistor 21 is connected in series with the inner layer measuring resistor branch 11 to form a measuring branch, the low-voltage arm shielding resistor 22 is connected in series with the outer layer shielding resistor branch 12 to form a shielding branch, the measuring branch and the shielding branch are connected in parallel, the load resistor is connected to the measuring branch through the matching resistor, and the end of the load resistor away from the matching resistor is grounded. The low-voltage arm measuring resistor 21 and the low-voltage arm shielding resistor 22 satisfy the following relationship:

[0049]

[0050] Where, r is the low voltage arm measurement resistor 21; r' is the low voltage arm shielding resistor 22; R0 is the matching resistor; R x is the load resistance.

[0051] Furthermore, in this embodiment, the low-voltage arm measuring resistor 21 and the low-voltage arm shielding resistor 22 are both made of resistance wires that are non-uniformly double-layered and reversely wound on the outer peripheral wall of the hollow epoxy resin winding rod.

[0052] Specifically, the low-voltage arm shielding resistor 22 and the low-voltage arm measuring resistor 21 are both resistors made by using a small-sized hollow epoxy resin winding rod to wind the resistance wire in forward and reverse directions.

[0053] Among them, the low-voltage arm measuring resistor 21 is electrically connected to the inner measuring resistor branch 11 through screws, but remains insulated from the outer shielding resistor branch 12; the low-voltage arm shielding resistor 22 is electrically connected to the outer shielding resistor branch 12 through screws, but remains insulated from the inner measuring resistor branch 11; the low-voltage arm shielding resistor 22 and the low-voltage arm measuring resistor 21 are both electrically connected to the second metal flange 50 through screws.

[0054] Exemplarily, the hollow epoxy resin winding rod adopts a hollow white nylon winding rod.

[0055] Furthermore, in this embodiment, when the resistance value of each resistor of the inner layer measurement resistor branch 11 satisfies R n =5.37e -0.14n +0.24e -0.26n When (n=1, 2, ..., 10), the distributed parameters of the measurement loop formed by the capacitance of each resistor section of the inner layer measurement resistance branch 11 to ground and the inductance of each inner layer measurement resistance branch 11 make the stabilization time of the step wave response the shortest.

[0056] Specifically, when R1, R2, R3, R4, R5, ... R 10 Satisfy R n =5.37e -0.14n +0.24e -0.26n When (n=1,2,...,10), the distributed parameters of the measurement loop composed of the capacitance of each resistor section of the inner measurement resistance branch 11 to ground and the inductance of each inner measurement resistance branch 11 make the dynamic response characteristics of the voltage divider device optimal, that is, the stabilization time of the step wave response is the shortest.

[0057] Furthermore, in this embodiment, the non-uniform double-layer reverse winding structure satisfies that the number of turns of the resistors in different sections is different; the turn spacing of the resistor wire wound in a single section is different; the turn spacing of the resistors in the N sections of the high-voltage arm 10 gradually increases from top to bottom; the resistance value of each section of the resistor in the inner layer measuring resistor branch 11 satisfies R n =5.37e -0.14n +0.24e -0.26n (n=1,2,...,10).

[0058] Specifically, the turn spacing of the resistors of the N high-voltage arms 10 gradually increases from top to bottom, that is, the winding density of the resistor wire gradually decreases from top to bottom.

[0059] Continue to refer to Figure 1In this embodiment, the low-voltage arm 20 also includes an upper cover plate 23, a shielding tube 24, a first low-voltage arm connecting plate 25 and a second low-voltage arm connecting plate 26. The upper cover plate 23 is covered on the top of the shielding tube 24. The upper cover plate 23 is connected to the top of the shielding tube 24 by screws. The low-voltage arm measuring resistor 21, the low-voltage arm shielding resistor 22, the first low-voltage arm connecting plate 25 and the second low-voltage arm connecting plate 26 are all located in the shielding tube 24. The low-voltage arm measuring resistor 21 and the low-voltage arm shielding resistor 22 are both located between the first low-voltage arm connecting plate 25 and the second low-voltage arm connecting plate 26, the top ends of the low-voltage arm measuring resistor 21 and the low-voltage arm shielding resistor 22 are both connected to the first low-voltage arm connecting plate 25, and the bottom ends of the low-voltage arm measuring resistor 21 and the low-voltage arm shielding resistor 22 are both connected to the second low-voltage arm connecting plate 26; the top end of the low-voltage arm measuring resistor 21 is connected to the measuring cable head 201 of the external measuring instrument 2 at the same potential through the copper wire 202, and the second metal flange 50 is grounded.

[0060] Specifically, the outer hollow epoxy resin winding rod 121 and the inner hollow epoxy resin winding rod 111 are both connected to the upper cover plate 23, wherein the upper cover plate 23 is an insulating part, and the top ends of the low-voltage arm measuring resistor 21 and the low-voltage arm shielding resistor 22 are connected to the first low-voltage arm connecting plate 25 through screws, and the bottom ends of the low-voltage arm measuring resistor 21 and the low-voltage arm shielding resistor 22 are connected to the second low-voltage arm connecting plate 26 through screws.

[0061] Among them, the measuring cable head 201 is arranged between the second low-voltage arm connecting plate 26 and the second end cover 33, and the top of the low-voltage arm measuring resistor 21 is connected to the top of the measuring cable head 201 with the same potential through the copper wire 202, so that the measuring cable (i.e., the copper wire 202) can realize the transmission of the measuring signal.

[0062] It should be noted that R0 is a matching resistor. When the sum of the matching resistor and the low-voltage arm measuring resistor 21 is the same as the wave impedance of the measuring cable, the refraction and reflection of the wave during propagation can be reduced to a minimum. x The load resistance of the secondary digital recorder usually includes the end matching resistance of the measurement cable.

[0063] Continue to refer to Figure 3 The working state of the non-uniform configuration resistor voltage divider device 1 based on distributed parameter optimization provided in this embodiment is: a voltage equalizing ring 4 is arranged at the top of the non-uniform configuration resistor voltage divider device 1, and the voltage equalizing ring 4 is connected to the top of the non-uniform configuration resistor voltage divider device 1 through screws, and the voltage source 3 is connected to the voltage equalizing ring 4 through the copper wire 202 and the screws, that is, the voltage source 3 is connected to the high-voltage end of the non-uniform configuration resistor voltage divider device 1, and the voltage source 3 is used to provide a primary voltage to the non-uniform configuration resistor voltage divider device 1; the low-voltage arm measuring resistor 21 of the non-uniform configuration resistor voltage divider device 1 is connected to the measuring cable head 201 of the measuring instrument 2 through a coaxial cable (i.e., the copper wire 202).

[0064] Among them, when the voltage source 3 is a square wave voltage source 3, the step wave response measured by the non-uniform configuration resistor voltage divider device 1 can reflect the dynamic response characteristics of the voltage divider. When the voltage source 3 is a lightning impulse voltage source 3, the non-uniform configuration resistor voltage divider device 1 measures a lightning impulse voltage waveform, and the maximum lightning impulse voltage it can withstand is 1500kV.

[0065] Second embodiment:

[0066] Continue to refer to Figure 4 The second embodiment of the present invention provides a design method of a non-uniform resistor voltage divider device 1 based on distributed parameter optimization as provided in the first embodiment, comprising the following steps:

[0067] S101, the high voltage arm 10 and the low voltage arm 20 all adopt an inner and outer double-layer shielding structure, and the resistance value of the outer shielding resistance branch 12 of the high voltage arm 10 at the corresponding height is m times the resistance value of the inner measuring resistance branch 11 of the high voltage arm 10, that is, m is the ratio of the resistance diameter of the outer shielding resistance branch 12 to the resistance diameter of the inner measuring resistance branch 11, that is;

[0068]

[0069] Wherein, R1, R2, R3, R4, R5 are the resistance values ​​of the inner layer measuring resistance branch 11 of the high voltage arm 10; R1', R2', R3', R4', R5' are the resistance values ​​of the outer layer shielding resistance branch 12 of the high voltage arm 10.

[0070] At the same time, the low-voltage arm measuring resistor 21 of the low-voltage arm 20 and the low-voltage arm shielding resistor 22 of the low-voltage arm 20 satisfy the following relationship:

[0071]

[0072] Where, r is the low voltage arm measurement resistor 21; r' is the low voltage arm shielding resistor 22; R0 is the matching resistor; R x is the load resistance.

[0073] S102, the inner layer measuring resistance branch 11 and the outer layer shielding resistance branch 12 are both N-section resistors, where N is a natural number greater than or equal to 10 and less than or equal to 1.

[0074] Specifically, when R1, R2, R3, R4, R5, ... R 10 Satisfy R n =5.37e -0.14n +0.24e -0.26nWhen (n=1,2,...,10), the distributed parameters of the measurement loop composed of the capacitance of each resistor section of the inner layer measurement resistance branch 11 to the ground and the inductance of each inner layer measurement resistance branch 11 make the dynamic response characteristics of the voltage divider device optimal, that is, the stabilization time of the step wave response is the shortest. Among them, the inner layer measurement resistance branch 11 and the outer layer shielding resistance branch 12 are both made of resistance wire non-uniform double-layer reverse winding on the outer peripheral wall of the hollow epoxy resin winding rod; the low voltage arm measurement resistor 21 and the low voltage arm shielding resistor 22 are both made of resistance wire non-uniform double-layer reverse winding on the outer peripheral wall of the hollow epoxy resin winding rod, and the number of sections of the hollow epoxy resin winding rod is set corresponding to the number of sections of the resistor.

[0075] S103, the high-voltage arm 10 and the low-voltage arm 20 both adopt a non-uniform double-layer reverse winding structure, which satisfies the different number of turns of the resistors in different sections; the turn spacing of the resistor wire wound in a single section is different; the turn spacing of the resistors in the N sections of the high-voltage arm 10 gradually increases from top to bottom; the resistance value of each section of the resistor in the inner layer measurement resistor branch 11 of the high-voltage arm 10 satisfies R n =5.37e -0.14n +0.24e -0.26n (n=1,2,...,10).

[0076] The present application provides a non-uniform configuration resistor voltage divider device 1 based on distributed parameter optimization and a design method, wherein the non-uniform configuration resistor voltage divider device 1 based on distributed parameter optimization includes a high-voltage arm 10, a low-voltage arm 20, an epoxy cylinder 30, a first metal flange 40 and a second metal flange 50; the first metal flange 40 and the second metal flange 50 are respectively arranged at the top and bottom ends of the epoxy cylinder 30, the high-voltage arm 10 and the low-voltage arm 20 are both accommodated in the epoxy cylinder 30, the high-voltage arm 10 and the low-voltage arm 20 are arranged in sequence from top to bottom along the center line direction of the epoxy cylinder 30, the high-voltage arm 10 is electrically connected to the low-voltage arm 20, the high-voltage arm 10 is electrically connected to the first metal flange 40 through a metal connector 60, and the low-voltage arm 2 0 is electrically connected to the second metal flange 50; both the high-voltage arm 10 and the low-voltage arm 20 adopt an inner and outer double-layer shielding structure, and both the high-voltage arm 10 and the low-voltage arm 20 adopt a non-uniform double-layer reverse winding structure; the design process is: both the high-voltage arm 10 and the low-voltage arm 20 adopt an inner and outer double-layer shielding structure-the inner layer measurement resistance branch 11 and the outer layer shielding resistance branch 12 are N-section resistances-the high-voltage arm 10 and the low-voltage arm 20 adopt a non-uniform double-layer reverse winding structure; by setting the high-voltage arm 10 and the low-voltage arm 20 to adopt an inner and outer double-layer shielding structure, and the high-voltage arm 10 and the low-voltage arm 20 to adopt a non-uniform double-layer reverse winding structure, the capacitance and inductance parameters can be flexibly adjusted, thereby improving the measurement accuracy of the impulse transient high voltage.

[0077] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0078] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A non-uniform resistor voltage divider device based on distributed parameter optimization, characterized in that: It includes a high-pressure arm, a low-pressure arm, an epoxy cylinder, a first metal flange and a second metal flange; The first metal flange and the second metal flange are respectively arranged at the top and bottom of the epoxy cylinder, the high-voltage arm and the low-voltage arm are both accommodated in the epoxy cylinder, the high-voltage arm and the low-voltage arm are arranged in sequence from top to bottom along the center line direction of the epoxy cylinder, the high-voltage arm is electrically connected to the low-voltage arm, the high-voltage arm is electrically connected to the first metal flange through a metal connector, and the low-voltage arm is electrically connected to the second metal flange; The high-voltage arm and the low-voltage arm both adopt an inner and outer double-layer shielding structure, and the high-voltage arm and the low-voltage arm both adopt a non-uniform double-layer reverse winding structure.

2. The non-uniform resistor voltage divider device based on distributed parameter optimization according to claim 1, characterized in that: The high-voltage arm comprises an inner layer measuring resistance branch and an outer layer shielding resistance branch, wherein the inner layer measuring resistance branch is inserted in the outer layer shielding resistance branch, and the inner layer measuring resistance branch and the outer layer shielding resistance branch are both N-section resistances, wherein N is a natural number greater than or equal to 10 and less than or equal to 1; The resistance value of the outer shielding resistance branch at the corresponding height is m times the resistance value of the inner measuring resistance branch, that is; Wherein, R1, R2, R3, R4, and R5 are the resistance values ​​of the inner measuring resistance branch of the high voltage arm; R1', R2', R3', R4', and R5' are the resistance values ​​of the outer shielding resistance branch of the high voltage arm.

3. The non-uniform resistor voltage divider device based on distributed parameter optimization according to claim 2, characterized in that: The inner layer measuring resistance branch and the outer layer shielding resistance branch both adopt resistance wire to be wound in a non-uniform double layer on the outer peripheral wall of the hollow epoxy resin winding rod, wherein the number of sections of the hollow epoxy resin winding rod is set corresponding to the number of sections of the resistor.

4. The non-uniform resistor voltage divider device based on distributed parameter optimization according to claim 2, characterized in that: The low-voltage arm comprises a low-voltage arm measuring resistor and a low-voltage arm shielding resistor, the low-voltage arm measuring resistor is inserted in the low-voltage arm shielding resistor, the low-voltage arm measuring resistor is electrically connected to the inner layer measuring resistor branch, the low-voltage arm shielding resistor is electrically connected to the outer layer shielding resistor branch, and the low-voltage arm measuring resistor and the low-voltage arm shielding resistor are both electrically connected to the second metal flange; The low-voltage arm measurement resistance and the low-voltage arm shielding resistance satisfy the following relationship: Where r is the low voltage arm measurement resistance; r' is the low voltage arm shielding resistance; R0 is the matching resistance; R x is the load resistance.

5. The non-uniform resistor voltage divider device based on distributed parameter optimization according to claim 4, characterized in that: The low-voltage arm measuring resistor and the low-voltage arm shielding resistor are both made of resistance wires that are non-uniformly double-layered and reversely wound on the outer peripheral wall of a hollow epoxy resin winding rod.

6. The non-uniform resistor voltage divider device based on distributed parameter optimization according to claim 2, characterized in that: When the resistance value of each resistor of the inner layer measurement resistor branch meets R n =5.37e -0.14n +0.24e -0.26n When (n=1, 2, ..., 10), the distributed parameters of the measurement loop composed of the ground capacitance of each resistor section of the inner layer measurement resistance branch and the inductance of each inner layer measurement resistance branch make the stabilization time of the step wave response the shortest.

7. The non-uniform resistor voltage divider device based on distributed parameter optimization according to claim 2, characterized in that: The non-uniform double-layer reverse winding structure satisfies that the number of turns of resistors in different sections is different; the turn spacing of the resistor wire wound in a single section is different; the turn spacing of the resistors in the N sections of the high-voltage arm gradually increases from top to bottom; the resistance value of each section of the resistor in the inner layer measurement resistor branch meets R n =5.37e -0.14n +0.24e -0.26n (n=1,2,...,10).

8. The non-uniform resistor voltage divider device based on distributed parameter optimization according to claim 1, characterized in that: The epoxy cylinder is made of epoxy resin.

9. The non-uniform resistor voltage divider device based on distributed parameter optimization according to claim 4, characterized in that: The low-voltage arm also includes an upper cover plate, a shielding tube, a first low-voltage arm connecting plate and a second low-voltage arm connecting plate, the upper cover plate is covered on the top end of the shielding tube, the upper cover plate is connected to the top end of the shielding tube by screws, the low-voltage arm measuring resistor, the low-voltage arm shielding resistor, the first low-voltage arm connecting plate and the second low-voltage arm connecting plate are all located in the shielding tube, the low-voltage arm measuring resistor and the low-voltage arm shielding resistor are both located between the first low-voltage arm connecting plate and the second low-voltage arm connecting plate, the top ends of the low-voltage arm measuring resistor and the low-voltage arm shielding resistor are both connected to the first low-voltage arm connecting plate, and the bottom ends of the low-voltage arm measuring resistor and the low-voltage arm shielding resistor are both connected to the second low-voltage arm connecting plate; The top end of the low-voltage arm measuring resistor is connected to the measuring cable head of an external measuring instrument at the same potential through a copper wire, and the second metal flange is grounded.

10. A design method for a non-uniform resistor voltage divider device based on distributed parameter optimization according to any one of claims 1 to 9, characterized in that: The steps include: The high-voltage arm and the low-voltage arm both adopt an inner and outer double-layer shielding structure, and the resistance value of the outer shielding resistance branch of the high-voltage arm at a corresponding height is m times the resistance value of the inner measuring resistance branch of the high-voltage arm; The inner layer measurement resistance branch and the outer layer shielding resistance branch are both N-section resistors, where N is a natural number greater than or equal to 10 and less than or equal to 1; The high-voltage arm and the low-voltage arm both adopt a non-uniform double-layer reverse winding structure, and the non-uniform double-layer reverse winding structure satisfies that the number of turns of resistors in different sections is different; the turn spacing of the resistor wire wound by a single section of resistor is different; the turn spacing of the resistors of the N sections of the high-voltage arm gradually increases from top to bottom; the resistance value of each section of the resistor of the inner layer measurement resistor branch of the high-voltage arm satisfies R n =5.37e -0.14n +0.24e -0.26n (n=1,2,...,10).

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