High-energy lightning impulse current acquisition system
By employing a Pearson 4427 current coil and specific component connection methods, the problems of induced magnetic saturation and the influence of grounding loop length in existing high-energy lightning impulse current acquisition systems have been solved, achieving accurate measurement of high-frequency current and waveform integrity.
Patent Information
- Application Number
- CN202422790473.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-11-15
AI Technical Summary
In existing high-energy lightning impulse current acquisition systems, the Pearson 1423 current coil is prone to induced magnetic saturation, making it impossible to accurately measure high-frequency peak currents, and the measurement results are affected by the length of the grounding loop.
A high-energy lightning impulse current acquisition system was constructed using a Pearson 4427 current coil, with the coil position adjusted to avoid the influence of the grounding loop length. This system includes specific connection methods for components such as a high-voltage charging power supply, charging resistor, discharge gap, tuning resistor, tuning inductor, test sample, and energy storage capacitor.
It achieves accurate measurement of high-frequency current, avoids induced magnetic saturation and waveform distortion, and ensures the accuracy and integrity of measurement results.
Smart Images
Figure CN223471085U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to electrician electron measurement technical field, concretely relates to a high energy lightning impulse current collection system. BACKGROUND
[0002] At present, high energy lightning impulse current collection system needs to use Pearson 1423 type current coil, and the current coil is connected together with the test product EUT, because the 200kA 10 / 350us high energy lightning impulse current wave tail duration is long, its charge Q value is very large, the current time product value Q of Pearson 1423 type current coil is 75As, the inductive magnetic saturation phenomenon occurs, leading to current waveform distortion, and even damaging the current coil, the current waveform of the 200kA 10 / 350us high energy lightning impulse current generator mostly has crowbar structure, and the current waveform has high-frequency peak, and the Pearson 1423 type current coil cannot accurately measure the high-frequency maximum peak current, before the current collection coil is grounded at the discharge loop of the impulse current generator, the greater the impulse current, the longer the loop from one-point grounding to the test product, and the higher the voltage generated on the loop, the voltage conflicts with the inductive voltage of the current coil, influences the real inductive voltage of the current coil, leads to inaccurate measurement result, therefore, a high energy lightning impulse current collection system is required to solve the above problems. SUMMARY
[0003] The utility model aims at providing a high energy lightning impulse current collection system to solve the problems in the background.
[0004] To achieve the above object, the utility model provides the following technical scheme: a high energy lightning impulse current collection system, including high voltage charging power supply U, charging resistance Rc, discharge gap G, wave modulation resistance Rm, wave modulation inductance Lr, test product EUT, current coil, crowbar and energy storage capacitor C, the high voltage charging power supply U is connected with charging resistance Rc and energy storage capacitor C, charging resistance Rc and energy storage capacitor C are connected with discharge gap G, discharge gap G is connected with wave modulation resistance Rm and wave modulation inductance Lr, wave modulation inductance Lr is connected with test product EUT and crowbar, energy storage capacitor C is connected with current coil, current coil, test product EUT and crowbar are grounded.
[0005] By setting the above structure, the current coil adopts Pearson 4427 type current coil, the maximum peak current of the current coil is improved to 500kA, the current time product Q=480As, which is much higher than the current peak value and the charge Q=100As of the 200kA 10 / 350us high-energy lightning impulse current generator, so that the maximum peak current can be accurately measured without waveform distortion and distortion, and the system can accurately measure the high-frequency maximum peak current of the Crowbar structure generator, and the measurement result of the system is ensured.
[0006] As a preferred scheme, the high-voltage charging power supply U, the charging resistor Rc and the energy storage capacitor C are connected in series in the same loop.
[0007] As a preferred scheme, the discharge gap G, the wave modulation resistor Rm, the wave modulation inductor Lr, the test product EUT, the current coil and the energy storage capacitor C are connected in series in the same loop.
[0008] As a preferred scheme, the test product EUT and the Crowbar are connected in series in the same loop.
[0009] As a preferred scheme, the energy storage capacitor C and the test product EUT are connected in parallel.
[0010] As a preferred scheme, the test product EUT and the Crowbar are connected in parallel.
[0011] As a preferred scheme, the current coil is a Pearson 4427 type current coil.
[0012] Compared with the prior art, the utility model has the beneficial effects that:
[0013] The utility model discloses, because the current coil adopts Pearson 4427 type current coil, improves the maximum peak current of current coil to 500kA, the current time product Q=480As, which is much higher than the current peak value and the charge Q=100As of the 200kA 10 / 350us high-energy lightning impulse current generator, so that the maximum peak current can be accurately measured without waveform distortion and distortion, and the system can accurately measure the high-frequency maximum peak current of the Crowbar structure generator, and the measurement result of the system is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the schematic diagram of the utility model.
[0015] In the figure: 1, high-voltage charging power supply U; 2, charging resistor Rc; 3, discharge gap G; 4, wave modulation resistor Rm; 5, wave modulation inductor Lr; 6, test product EUT; 7, current coil; 8, Crowbar; 9, energy storage capacitor C. DETAILED DESCRIPTION
[0016] The utility model will be further described below in combination with examples.
[0017] The following examples are used to illustrate the utility model, but cannot be used to limit the protection scope of the utility model. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements of the method of the utility model under the concept of the utility model all belong to the range required to be protected by the utility model.
[0018] Please refer to Figure 1 , the utility model provides a kind of high-energy lightning impulse current acquisition system, including high-voltage charging power supply U1, charging resistor Rc2, discharge gap G3, wave modulation resistor Rm4, wave modulation inductor Lr5, test product EUT6, current coil 7, Crowbar 8 and energy storage capacitor C9, high-voltage charging power supply U1 is connected with charging resistor Rc2 and energy storage capacitor C9, charging resistor Rc2 and energy storage capacitor C9 are connected with discharge gap G3, discharge gap G3 is connected with wave modulation resistor Rm4 and wave modulation inductor Lr5 by wave modulation resistor Rm4, wave modulation inductor Lr5 is connected with test product EUT6 and Crowbar 8, energy storage capacitor C9 is connected with current coil 7, current coil 7, test product EUT6 and Crowbar 8 are grounded, high-voltage charging power supply U1, charging resistor Rc2 and energy storage capacitor C9 are connected in the same loop, discharge gap G3, wave modulation resistor Rm4, wave modulation inductor Lr5, test product EUT6, current coil 7 and energy storage capacitor C9 are connected in the same loop, test product EUT6 and Crowbar 8 are connected in the same loop, energy storage capacitor C9 and test product EUT6 are in parallel, test product EUT6 and Crowbar 8 are in parallel, current coil 7 is set to Pearson 4427 type current coil 7, by setting the above structure, because current coil 7 adopts Pearson 4427 type current coil 7, improve the maximum peak current of current coil 7 to 500kA, current time product Q=480As, far higher than 200kA 10 / 350 μs high-energy lightning impulse current generator current peak value and charge Q=100As, ensure that the maximum peak current is accurately measured while the waveform is complete and distortionless, distortionless, true restoration, and after adjusting the position of current coil 7 to the ground of discharge loop, it is not affected by the length of the one-point grounding to test product loop, so that the system can accurately measure the high-frequency maximum peak current of Crowbar structure generator, ensure the measurement result of the system.
[0019] The working principle and use flow of the utility model: link the current coil 7 between the energy storage capacitor C9 and the test product EUT 6, make the current coil 7 be located in the discharge circuit, and after the current coil 7 is grounded at a point, it is not affected by the length of the circuit from the grounding point to the test product, so that the system can accurately measure the maximum peak current of the Crowbar 8 structure generator high frequency, and the measurement result of the system is guaranteed.
[0020] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A high-energy lightning impulse current collection system comprising a high-voltage charging power supply U (1), a charging resistor Rc (2), a discharge gap G (3), a wave-shaping resistor Rm (4), a wave-shaping inductor Lr (5), an EUT (6), a current coil (7), a Crowbar (8) and an energy storage capacitor C (9), characterized in that: The high-voltage charging power supply U (1) is connected with a charging resistor Rc (2) and an energy storage capacitor C (9), the charging resistor Rc (2) and the energy storage capacitor C (9) are connected with a discharge gap G (3), the discharge gap G (3) is connected with a wave modulation resistor Rm (4) and a wave modulation inductor Lr (5) through the wave modulation resistor Rm (4), the wave modulation inductor Lr (5) is connected with a test product EUT (6) and a Crowbar (8), the energy storage capacitor C (9) is connected with a current coil (7), and the current coil (7), the test product EUT (6) and the Crowbar (8) are grounded.
2. A high-energy lightning impulse current acquisition system according to claim 1, characterized in that: The high-voltage charging power supply U (1), the charging resistor Rc (2) and the energy storage capacitor C (9) are connected in series in the same loop.
3. A high-energy lightning impulse current acquisition system according to claim 1, characterized in that: The discharge gap G (3), the wave modulation resistor Rm (4), the wave modulation inductor Lr (5), the test product EUT (6), the current coil (7) and the energy storage capacitor C (9) are connected in series in the same loop.
4. The high-energy lightning impulse current acquisition system of claim 1, wherein: The test product EUT (6) and the Crowbar (8) are connected in series in the same loop.
5. A high-energy lightning impulse current collection system according to claim 1, characterized in that: The energy storage capacitor C (9) and the test product EUT (6) are arranged in parallel.
6. A high-energy lightning impulse current collection system according to claim 1, characterized in that: The test product EUT (6) and the Crowbar (8) are arranged in parallel.
7. The high-energy lightning impulse current collection system of claim 1, wherein: The current coil (7) is a Pearson 4427 type current coil (7).