Wide voltage standard voltage transformer

Abstract

The application discloses a wide-voltage standard voltage transformer and a calibration method. The transformer comprises a voltage equalizing ring, a first winding and a conductive rod. The conductive rod is connected with the voltage equalizing ring and the first winding at both ends. The primary high voltage is connected to the voltage equalizing ring and is transmitted to the first winding through the conductive rod. The first winding comprises a first primary coil and a first secondary coil. The transformer further comprises a second winding which further comprises a second primary coil and a second secondary coil. The second primary coil is connected to the middle tap of the first primary coil through a primary lead. The first secondary coil and the second secondary coil are connected to a secondary terminal block through a second winding secondary lead at different tap numbers. The input end of a data processing unit is connected to the output interface of the secondary terminal block. The input data is processed and output to obtain a corrected voltage value. The application covers a wider voltage transformer test range and reduces the workload and complexity of field tests.

Description

Technical Field

[0001] This invention belongs to the field of voltage transformer technology, and specifically relates to a wide-voltage standard voltage transformer. Background Technology

[0002] In power systems, voltage transformers play a crucial role in signal transmission, range expansion, and safety isolation. The measurement accuracy of voltage transformers directly affects the accuracy of electricity metering. Standard voltage transformers are used to calibrate voltage transformers, typically with voltage ratings of 6kV, 10kV, 35kV, and 66kV. kV, 20 / kV, with accuracy classes of 0.05, 0.02, and 0.01. Voltage transformers must be calibrated and qualified before installation and use. Due to the large number of voltage transformers in the power supply system, the periodic calibration of voltage transformers is a heavy workload, especially on-site calibration, which is even more difficult. Furthermore, the large size and weight of standard voltage transformers place greater demands on space and layout when conducting on-site calibration. In addition, because different voltage levels of voltage transformers require the corresponding configuration of multiple standard voltage transformers of different voltage levels, the workload and complexity of on-site testing are significantly increased.

[0003] Therefore, to improve the efficiency of field calibration of voltage transformers, it is urgent to study methods to enhance the portability of field calibration. While ensuring accuracy across the entire measurement range, the measurement range of standard voltage transformers should be broadened to meet the calibration needs of voltage transformers at different voltage levels. Combined with practical application solutions, this can greatly improve the universality of standard voltage transformers in field calibration, ensuring both accuracy across the entire measurement range and cost-effectiveness. Chinese invention patent application CN105742044A discloses a 500kV wide-ratio standard voltage transformer. It mainly consists of an equalizing cover, a primary terminal block, an insulating sleeve, a conductive rod, wires, a housing, a high-voltage shield, a primary coil, a secondary coil, a magnetic conductor assembly, an inflation valve, a connecting flange, and a secondary terminal block. Its key features are: the equalizing cover is mounted on the upper surface of the primary terminal block; the lower surface of the primary terminal block connects to the upper surface of the insulating sleeve; the conductive rod is mounted on the lower surface of the primary terminal block; the insulating sleeve is mounted on the upper surface of the housing; one end of the conductive rod is connected to the high-voltage shield via a wire; the high-voltage shield is fitted onto the primary coil; the primary coil is fitted onto the secondary coil; the secondary coil is fitted onto the magnetic conductor assembly; the magnetic conductor assembly connects to the connecting flange; the connecting flange connects to the lower surface of the housing; and an inflation valve and a secondary terminal block are installed outside the housing. Its measuring range can meet voltage levels of 500kV, 330kV, 220kV, 110kV, and 66kV.

[0004] Another Chinese invention patent application, CN111009402A, discloses a two-stage multi-ratio standard voltage transformer. This technical solution includes an insulating bushing, an outer casing, an iron core assembly, a first shielding cover, a second shielding cover, a conductor assembly, a terminal block, a conductive rod, two shielding plates, and a junction box. The conductor assembly is wound around the iron core assembly. The iron core assembly is located inside the first shielding cover. The two shielding plates are respectively located at both ends of the iron core assembly. The iron core assembly, conductor assembly, first shielding cover, and shielding plates are located inside the outer casing. The insulating bushing is located at the upper end of the outer casing and communicates with the outer casing. The second shielding cover is located inside the insulating bushing. The terminal block is connected to the insulating bushing. The conductive rod is located inside the second shielding cover and is connected to both the terminal block and the conductor assembly. The junction box is located outside the outer casing and is connected to the conductor assembly.

[0005] Since the accuracy of electricity metering directly affects the economic interests of both power supply and distribution departments and electricity users, both parties are very concerned about the accuracy of electricity metering. Improving the measurement range and accuracy of voltage transformers is not only a technical requirement of the power system, but also a common economic requirement for all units and users in the electricity market. The above technical solutions have the following problems: 1) The voltage coverage range of standard voltage transformers is only 500kV, 330kV, 220kV, 110kV, and 66kV, which cannot cover other voltage levels in transmission and distribution, such as 35kV, 10kV, and 6kV; 2) Due to the error in the output structure of standard voltage transformers, the above technical solutions cannot effectively reduce the error of standard voltage transformers. Summary of the Invention

[0006] This invention provides a wide-voltage standard voltage transformer, which aims to solve the problems of limited range coverage and inability to effectively reduce the error of existing standard voltage transformers.

[0007] To address the aforementioned technical problems, this invention proposes a wide-voltage standard voltage transformer, comprising an equalizing ring, a first winding, and a conductive rod. The conductive rod connects the equalizing ring and the first winding at both ends. A primary high voltage is connected to the equalizing ring and transmitted to the first winding via the conductive rod. The first winding includes a first primary coil and a first secondary coil. Multiple taps are led out from the first secondary coil at different turns and connected to a secondary terminal block via secondary leads of the first winding. The secondary terminal block provides an output interface.

[0008] Specifically, it also includes a second winding, which further includes a second primary coil and a second secondary coil. The second primary coil is connected to the center tap of the first primary coil via a primary lead. The second secondary coil has multiple taps at different turns connected to the secondary terminal block via secondary leads of the second winding. The input terminal of a data processing unit is connected to the output interface of the secondary terminal block, and the input data is processed and the corrected voltage value is output.

[0009] Preferably, the ratio of the number of turns at the center tap of the first primary coil to the total number of turns of the first primary coil is 7:44.

[0010] Preferably, the first secondary coil comprises three groups, and the ratio of the number of turns in each group to the total number of turns in the first primary coil is 1:2200, 1:1100, and 1:660, respectively.

[0011] Preferably, the second secondary coil comprises three groups, with the ratio of the number of turns in each group to the total number of turns in the second primary coil being 1:350, 1:100, and 1:60, respectively.

[0012] Preferably, the conductive rod is covered with a sleeve on its outer periphery.

[0013] Preferably, the standard voltage transformer is further provided with a housing to accommodate the first winding and the second winding, and a bottom flange is provided at the bottom of the housing, on which the first winding and the second winding are mounted.

[0014] Preferably, the outer periphery of the primary lead is covered with a shielding tube.

[0015] On the other hand, the present invention also proposes a wide-voltage standard voltage transformer verification method, which uses the aforementioned standard voltage transformer and performs the following steps through a data processing unit:

[0016] S1: Collect the output data of the standard voltage transformer, the output data including the measured value of the voltage signal and the actual value corresponding to the measured value;

[0017] S2: Establish and initialize the output prediction model, which is represented as follows:

[0018]

[0019] In the formula, It is in the The estimated value at each moment, It is the step size parameter. It is the first Error at any given moment It is the first The input signal value at each moment;

[0020] S3: Input the measured value into the output prediction model, output the estimated value from the prediction model, compare the estimated value with the true value, and calculate the error;

[0021] S4: Adjust the parameters of the output prediction model in real time based on the error;

[0022] S5: Repeat steps S3 and S4 until the preset stopping condition is reached to obtain the standard model;

[0023] S6: Use the voltage value output by the standard model as the output value of the standard voltage transformer.

[0024] Preferably, step S4 uses a nonlinear parameter update rule to adjust the parameters of the output prediction model, specifically as follows:

[0025] Define the nonlinear function and the nonlinear parameter update rule, wherein the nonlinear parameter update rule is specifically as follows:

[0026]

[0027] In the formula, For the first The model parameters at time... The predicted value, For the first The model parameters at the current time The value, It is the current moment. gradient, gradient Transformation using nonlinear functions. It is the step size parameter. It is the current moment. The error, It is the current moment. The input signal value;

[0028] Calculate the gradient based on the measured values ​​of the input output prediction model and the initialized parameters of the output prediction model;

[0029] The calculated gradient is transformed using the nonlinear function. The gradient value after the nonlinear function transformation and the calculated error are used to update the parameters of the output prediction model according to the nonlinear parameter update rule.

[0030] Preferably, the nonlinear function is one of the hyperbolic tangent function, sigmoid function, ReLU function, LeakyReLU function, Softmax function, and ELU function.

[0031] Compared with the prior art, the present invention has the following technical effects:

[0032] 1. The wide-voltage standard voltage transformer proposed in this invention integrates primary voltages of 6, 10, 35, 66, 110, and 220kV and secondary voltages of 100V and 100 / kV by setting an intermediate tap in the first primary coil and introducing it into the second primary coil. With an accuracy class of 0.05, it can be used for error calibration of 6-220kV voltage transformers, covering a wider range of voltage transformer tests and reducing the workload and complexity of on-site testing.

[0033] 2. The primary lead of the wide-voltage standard voltage transformer proposed in this invention is covered with a shielding tube. In order to achieve high voltage transmission, the primary lead uses a high-voltage line that can withstand 50kV. The shielding aluminum tube wrapped around the high-voltage line has a magnetic shielding effect, preventing interference from being introduced into the coil and improving the accuracy of the standard voltage transformer.

[0034] 3. The verification method proposed in this invention establishes an output prediction model and uses measured values ​​and true values ​​to calculate errors. The output prediction model is iteratively adjusted based on the errors to obtain a standard model for processing real-time measured values. The standard model established in this invention can effectively reduce the output error of standard voltage transformers and improve the accuracy of voltage transformer tests.

[0035] 4. The verification method proposed in this invention uses an output prediction model that iteratively updates the parameters of the output prediction model through nonlinear functions and nonlinear parameter update rules. This method has stronger adaptability and higher performance for the nonlinear characteristics of standard voltage transformer errors. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the standard voltage transformer described in this invention;

[0037] Figure 2 This is a schematic diagram of the winding structure according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the winding electrical circuit according to an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of a primary lead structure according to an embodiment of the present invention;

[0040] Figure 5 This is a wiring diagram of a standard voltage transformer used for testing according to an embodiment of the present invention;

[0041] Figure 6 This is a flowchart illustrating the verification method described in this invention.

[0042] Reference numerals in the attached diagram: 1. Equalizing ring; 2. First winding; 21. First primary coil; 22. First secondary coil; 23. Secondary lead of the first winding; 3. Conductive rod; 31. Sleeve; 4. Secondary terminal block; 5. Second winding; 51. Second primary coil; 52. Second secondary coil; 53. Secondary lead of the second winding; 6. Primary lead; 61. Shielding tube; 7. Housing; 71. Bottom plate flange; 8. First iron core. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present application and with reference to the accompanying drawings.

[0044] Example 1

[0045] like Figure 1 As shown, a wide-voltage standard voltage transformer includes an equalizing ring 1, a first winding 2, and a conductive rod 3. The conductive rod 3 connects the equalizing ring 1 and the first winding 2 at both ends. A primary high voltage is connected to the equalizing ring 1 and transmitted to the first winding 2 via the conductive rod 3. The first winding 2 includes a first primary coil 21 and a first secondary coil 22. Multiple taps are led out from the first secondary coil 22 at different turns and connected to a secondary terminal block 4 via secondary leads 23. The secondary terminal block 4 provides an output interface. The first core 8 of the first winding 2 uses low-loss silicon steel sheets. The primary high voltage is introduced through the equalizing ring 1 and then connected to the first primary coil 21 of the first winding 2 via the conductive rod 3. The first secondary coil 22 of the first winding 2 has taps with different turns, achieving different turns ratios with the first primary coil 21, corresponding to different primary high voltages, outputting a stable 100V or 100 / V. V voltage.

[0046] The standard voltage transformer described in this embodiment also includes a second winding 5, which further includes a second primary coil 51 and a second secondary coil 52. The second primary coil 51 is connected to the center tap of the first primary coil 21 via a primary lead 6. The second secondary coil 52 has multiple taps at different turns, which are connected to the secondary terminal block 4 via secondary leads 53. The input terminal of a data processing unit is connected to the output interface of the secondary terminal block 4 to process the input data and output the corrected voltage value. The second core of the second winding 5 (not shown in the figure) also uses low-loss silicon steel sheets. The second primary coil 51 of the second winding 5 is introduced from the center tap of the first primary coil 21, similar to the first winding 2. The second secondary coil 52 of the second winding 5 has taps with different turns, achieving different turns ratios with the second primary coil 51, corresponding to different primary high voltages, and outputting a stable 100V or 10000V / V. V voltage.

[0047] In a preferred embodiment of the present invention, the ratio of the number of turns at the center tap of the first primary coil 21 to the total number of turns of the first primary coil 21 is 7:44. Corresponding to the ratio of the number of turns at the center tap of the first primary coil 21 to the total number of turns of the first primary coil 21 of 7:44, the first secondary coil 22 includes three groups, each with a turn ratio of 1:2200, 1:1100, and 1:660 to the total number of turns of the first primary coil 21, respectively. Corresponding to the ratio of the number of turns at the center tap of the first primary coil 21 to the total number of turns of the first primary coil 21 of 7:44, the second secondary coil 52 includes three groups, each with a turn ratio of 1:350, 1:100, and 1:60 to the total number of turns of the second primary coil 51, respectively.

[0048] According to the above proportions, in a preferred embodiment of the present invention, the first primary coil 21 of the first winding 2 is wound with 15,000 turns of copper round wire with a diameter of 0.1 mm, and polyester film is used between the layers. In order to reduce losses, the first primary coil 21 adopts a rectangular winding structure. In order to reduce the DC resistance of the first secondary coil 22 of the first winding 2, the turns ratio of the first winding is 2200, 1100, and 660, corresponding to primary high voltage inputs of 220kV, 110kV, and 66kV. Therefore, the first secondary coil 22 of the first winding 2 is wound with 7 turns, 14 turns, and 23 turns of copper round wire with a diameter of 2 mm; the DC resistances are 0.05 ohms, 0.08 ohms, and 0.15 ohms, respectively.

[0049] The second primary winding 51 of the second winding 5 is wound with 5000 turns of copper round wire with a diameter of 0.1mm. The turns ratio of the secondary winding is 350, 100, and 60, corresponding to primary high voltage inputs of 35kV, 10kV, and 6kV. The second secondary winding 52 of the second winding 5 is wound with 14, 50, and 83 turns of copper wire with a diameter of 2mm, with DC resistances of 0.08 ohms, 0.2 ohms, and 1 ohm, respectively, thereby reducing the voltage drop of the secondary winding and improving the linearity of the standard voltage transformer error. The final winding structure is as follows. Figure 2 As shown.

[0050] like Figure 3 As shown, under the aforementioned winding turn count, the A2 terminal of the first secondary coil 21 of the first winding 2 is connected to the transformer output line, and N2 is grounded. The A1 terminal of the second primary coil 51 of the second winding 5 is connected to the 2380th turn of the first primary coil 21 via a primary lead 6, with a center tap extending from this point. The primary lead 6 is introduced into the second winding 5 along the first core 8 of the first winding 2, and the N1 terminal is grounded. Figure 3In the diagram, a1-a6 are taps connected at different turns of the secondary coil. Specifically, the number of turns between n and a1 is 14, between n and a2 is 50, and between n and a3 is 83; the number of turns between n2 and a4 is 7, between n2 and a5 is 14, and between n2 and a6 is 23. In other embodiments of the invention, other taps, such as a7 and a8, can be provided in the secondary coil, or other taps (not shown in the figure) can be provided in the second secondary coil 52 to achieve different turns ratios other than those in this embodiment.

[0051] In other embodiments of the present invention, a control box can be set up, and a transformer ratio switching device can be set up in the control box to realize automatic switching between different tap connections of the secondary coil, thereby reducing the labor intensity of operators, saving operation time and improving work efficiency.

[0052] According to the above proportional winding, when the input voltage of the first winding 2 is 220kV, the input voltage to the second winding 5 through the above proportional winding method is 35kV; when the input voltage of the first winding 2 is 110kV... At kV, the input voltage to the second winding 5 via the above-mentioned proportional winding method is 10kV; the input voltage to the first winding 2 is 66 / At kV, the input voltage to the second winding 5 via the above-described proportional winding method is 6kV. This allows the primary voltage input to the second winding 5 to be adjustable from 6-35kV.

[0053] For those skilled in the art, the ratios 7:44, 1:2200, 1:1100, 1:660, 1:350, 1:100, and 1:60 are not the only configuration methods for the standard voltage transformer windings of this invention. It is sufficient to ensure that 220kV, 100kV, 66kV, 35kV, 10kV, and 6kV transformers can produce 100V or 100 / kV. The voltage V can be set reasonably according to the winding requirements based on the principle that the voltage ratio of a standard voltage transformer is equal to the turns ratio (N1 / N2=U1 / U2).

[0054] The conductive rod 3 is covered by a sleeve 31. In a preferred embodiment, the sleeve is made of silicone rubber, with a height of 700 mm and a withstand voltage of 153 kV.

[0055] The standard voltage transformer also includes a housing 7 to accommodate the first winding 2 and the second winding 5. A base flange 71 is provided at the bottom of the housing 7, and the first winding 2 and the second winding 5 are mounted on the base flange 71. A preferred embodiment is that the housing is made of magnesium-aluminum alloy and has a height of 500mm. The body of the standard voltage transformer is housed within the magnesium-aluminum alloy housing 7.

[0056] like Figure 4As shown, the primary lead 6 is covered by a shielding tube 61. To achieve high-voltage transmission, the primary lead 6 uses a high-voltage wire capable of withstanding 50kV. The shielding aluminum tube 61 surrounding the high-voltage wire provides magnetic shielding, preventing interference from being introduced into the coil. The high-voltage wire passes through the iron core and can withstand 50kV AC high voltage, meeting the withstand voltage requirements.

[0057] During testing, such as Figure 5 As shown, first, the test voltage transformer is moved to the test area. The primary terminals of the test transformer are connected to the primary terminals of both the standard voltage transformer and the test voltage transformer. Simultaneously, the secondary terminals of both the standard voltage transformer and the test voltage transformer are connected to the transformer calibrator. The secondary terminals of the standard voltage transformer are the output terminals of the data processing module. The calibrator performs an error measurement test. After the test, the test transformer is adjusted to a low-voltage state. Then, the primary terminals of the test transformer and the standard voltage transformer are disconnected. The A and N terminals of the test voltage transformer are connected to the high-voltage side of the test transformer. A power frequency withstand voltage test is performed through the control platform. After the test, the test transformer is adjusted to 0V.

[0058] Example 2

[0059] A method for verifying a wide-voltage standard voltage transformer, wherein the verification method uses a standard voltage transformer as described in Embodiment 1, such as... Figure 6 As shown, the following steps are performed by the data processing unit:

[0060] S1: Collect the output data of a standard voltage transformer, which includes the measured value of the voltage signal and the corresponding true value. The true value can be obtained through standard measuring equipment or laboratory testing.

[0061] S2: Establish and initialize the output prediction model, which is represented as follows:

[0062]

[0063] In the formula, It is in the The estimated value at each moment, It is the step size parameter. It is the first Error at any given moment It is the first The input signal value at each time step. In a preferred embodiment of the invention, the initial step size parameter is set to 0.8, and the step size parameter is gradually reduced as the number of iterations increases to balance convergence speed and stability. The final step size after iteration is 0.23.

[0064] S3: Input the measured value into the initialized output prediction model, the output prediction model outputs an estimated value, the estimated value is compared with the true value, and the error is calculated.

[0065] S4: Adjust the parameters of the output prediction model in real time based on the error to reduce the error.

[0066] In a preferred embodiment of the present invention, the parameters of the output prediction model are adjusted using a nonlinear parameter update rule, as follows:

[0067] Define a nonlinear function and a nonlinear parameter update rule. The nonlinear function can be one of the hyperbolic tangent function, sigmoid function, ReLU function, Leaky ReLU function, Softmax function, and ELU function. The specific nonlinear parameter update rule is as follows:

[0068]

[0069]

[0070] In the formula, For the first The model parameters at time... The predicted value, For the first The model parameters at the current time The value, It is the current moment. gradient, gradient Transformation using nonlinear functions. It is the step size parameter. It is the current moment. The error, It is the first The current time of the model The input signal value, It is the current moment. The input signal value;

[0071] Calculate the gradient based on the measured values ​​of the input output prediction model and the initialized parameters of the output prediction model;

[0072] The calculated gradient is transformed using the nonlinear function. The gradient value after the nonlinear function transformation and the calculated error are used to update the parameters of the output prediction model according to the nonlinear parameter update rule.

[0073] By iteratively updating the parameters of the output prediction model using the aforementioned nonlinear function and nonlinear parameter update rules, it exhibits stronger adaptability and higher performance for the nonlinear characteristics of standard voltage transformer errors.

[0074] S5: Repeat steps S3 and S4 until a pre-set stopping condition is met to obtain the standard model. The stopping condition can be reaching a certain number of iterations or the error converging to a set threshold. This embodiment uses an error threshold to set the stopping condition. If the error eventually converges to less than 0.5%, the iteration stops, and the current output prediction model is saved as the final standard model.

[0075] S6: Use the voltage value output by the standard model as the output value of the standard voltage transformer.

[0076] When using the standard voltage transformer as described in Example 1, the primary terminals of the test transformer are connected to the primary terminals of the standard voltage transformer and the test voltage transformer. Simultaneously, the secondary terminals of the standard voltage transformer and the test voltage transformer are connected to the transformer calibrator. The secondary terminal of the standard voltage transformer is the output terminal of the data processing module. The output value of the standard voltage transformer collected by the transformer calibrator is the data processed by the data processing module. After connection, the transformer calibrator performs an error measurement test, using the standard voltage transformer to test the performance of the test voltage transformer.

[0077] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A method for verifying a wide-voltage standard voltage transformer, characterized in that, The standard voltage transformer used in the verification method includes an equalizing ring (1), a first winding (2), and a conductive rod (3). The conductive rod (3) connects the equalizing ring (1) and the first winding (2) at both ends. A primary high voltage is connected to the equalizing ring (1) and transmitted to the first winding (2) via the conductive rod (3). The first winding (2) includes a primary coil (21) and a secondary coil (22). Multiple taps are led out from different turns of the primary coil (22) and connected to a secondary terminal block (4) via secondary leads (23) of the first winding. The secondary terminal block (4) provides an output interface. The second winding (5) further includes a second primary coil (51) and a second secondary coil (52). The second primary coil (51) is connected to the middle tap of the first primary coil (21) through a primary lead (6). The second secondary coil (52) has multiple taps at different turns and is connected to the secondary terminal block (4) through the secondary lead (53) of the second winding. The input terminal of a data processing unit is connected to the output interface of the secondary terminal block (4) to process the input data and output the corrected voltage value. The outer periphery of the primary lead (6) is covered with a shielding tube (61). The verification method executes the following steps through the data processing unit: S1: Collect the output data of the standard voltage transformer, the output data including the measured value of the voltage signal and the actual value corresponding to the measured value; S2: Establish and initialize the output prediction model, which is represented as follows: In the formula, It is in the The estimated value at each moment, It is the step size parameter. It is the first Error at any given moment It is the first The input signal value at each moment; S3: Input the measured value into the output prediction model, output the estimated value from the prediction model, compare the estimated value with the true value, and calculate the error; S4: Adjust the parameters of the output prediction model in real time based on the error; S5: Repeat steps S3 and S4 until the preset stopping condition is reached to obtain the standard model; S6: Use the voltage value output by the standard model as the output value of the standard voltage transformer; Specifically, step S4 uses a nonlinear parameter update rule to adjust the parameters of the output prediction model, as follows: Define the nonlinear function and the nonlinear parameter update rule, wherein the nonlinear parameter update rule is specifically as follows: In the formula, For the first The model parameters at time... The predicted value, For the first The model parameters at the current time The value, It is the current moment. gradient, gradient Transformation using nonlinear functions. It is the step size parameter. It is the current moment. The error, It is the current moment. The input signal value; Calculate the gradient based on the measured values ​​of the input output prediction model and the initialized parameters of the output prediction model; The calculated gradient is transformed using the nonlinear function. The gradient value after the nonlinear function transformation and the calculated error are used to update the parameters of the output prediction model according to the nonlinear parameter update rule.

2. The verification method according to claim 1, characterized in that, The ratio of the number of turns of the middle tap of the first primary coil (21) to the total number of turns of the first primary coil (21) is 7:

44.

3. The verification method according to claim 2, characterized in that, The first secondary coil (22) includes three groups, and the ratio of the number of turns in each group to the total number of turns in the first primary coil (21) is 1:2200, 1:1100, and 1:660, respectively.

4. The verification method according to claim 2, characterized in that, The second secondary coil (52) includes three groups, and the ratio of the number of turns in each group to the total number of turns in the second primary coil (51) is 1:350, 1:100, and 1:60, respectively.

5. The verification method according to claim 1, characterized in that, The conductive rod (3) is covered with a sleeve (31) on its outer periphery.

6. The verification method according to claim 1, characterized in that, The standard voltage transformer is also provided with a housing (7) for accommodating the first winding (2) and the second winding (5). The bottom of the housing (7) is provided with a base plate flange (71), and the first winding (2) and the second winding (5) are installed on the base plate flange (71).

7. The verification method according to claim 1, characterized in that, The nonlinear function is specifically one of the hyperbolic tangent function, sigmoid function, ReLU function, Leaky ReLU function, Softmax function, and ELU function.

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