CN106019005B - Test system and method for simulating transient ground potential rise - Google Patents
Test system and method for simulating transient ground potential rise Download PDFInfo
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Abstract
The invention discloses a test system for simulating transient state ground potential rise, which comprises a controller MCP, a high-voltage direct current power supply HVCD, a capacitor C1, a high-frequency inductor L1, a current-limiting resistor R1, a gas switch K1, a gas switch K2, a current-limiting resistor R2, a wave modulation circuit L R and a simulation grounding platform SGP, wherein the simulation grounding platform SGP is grounded through the high-frequency inductor L1, the high-voltage direct current power supply HVCD is connected with the capacitor C1 through the current-limiting resistor R1, the gas switch K1 can conduct the capacitor C1, the wave modulation circuit L R and the high-frequency inductor L1, the gas switch K2 can conduct the capacitor C1, the wave modulation circuit L R, the high-frequency inductor L1 and the current-limiting resistor R2, and the potential rise phenomenon of different stages of a simulation grounding grid can be realized through different grounding impedance changes and the control over conduction of different gas switches through the controller.
Description
Technical Field
The invention relates to the field of simulation, in particular to a test system and a test method for simulating transient ground potential rise.
Background
Lightning strikes, system faults or switching operations can produce transient over-voltages or over-currents on the grid or communications. Such an overvoltage or overcurrent is a very energetic disturbance, which has a great influence on the electronic equipment, typically manifested as a local potential rise and a reference potential change of the electronic circuit. With the development of the intelligent substation and the operation of a large number of projects, a large number of sensors and electronic equipment such as intelligent equipment IEDs are arranged near outdoor primary equipment, so that the probability of damage to the sensors and the electronic equipment caused by transient ground potentials caused by lightning strikes, system faults and the like is obviously increased.
At present, the research and related documents in the field of transient earth potential rise of transformer substations at home and abroad are more, and the research on the transient characteristics of the soil under the action of the impact voltage and the research on related physical modeling and calculating methods are mainly concentrated. The test method for transient earth potential rise can be mainly divided into two types: one method is to inject an impact current source or impact voltage into a real grounding grid for measurement on the site of a transformer substation, the voltage of the impact source is required to reach over 200kV, the grounding grid of the transformer substation is subjected to certain impact, the test difficulty is high, the cost is high, and a small amount of tests are only performed when the grounding grid characteristic test is performed on a newly built transformer substation which is not put into operation at present; another method to simulate transient ground potential rise in a laboratory is to inject a surge current source or surge voltage into the laboratory's ground net, or to simulate the ground net impedance with a fixed impedance.
Then, the influence of the characteristics of a grounding grid of a laboratory on the conventional experimental method is large, and large uncertainty exists; the second method is a more common method of simulating the grounding grid through fixed impedance, but the second method cannot comprehensively simulate the phenomena of grounding grid impedance change and the like.
Disclosure of Invention
In order to solve the problem, the invention provides a test system for simulating transient state ground potential rise, which comprises a controller MCP, a high-voltage direct current power supply HVCD, a capacitor C1, a high-frequency inductor L, a current-limiting resistor R1, a gas switch K1, a gas switch K2, a current-limiting resistor R2, a wave-modulating circuit L R and a simulation grounding platform SGP, wherein the simulation grounding platform SGP is grounded through the high-frequency inductor L1, the high-voltage direct current power supply HVCD is connected with the capacitor C1 through the current-limiting resistor R1, the gas switch K1 can be communicated with the capacitor C1, the wave-modulating circuit L R and the high-frequency inductor L, the gas switch K2 can be communicated with the capacitor C1, the wave-modulating circuit L R, the high-frequency inductor L and the current-limiting resistor R2, the gas switch K2 and the current-limiting resistor R2 are connected in series to form a parallel circuit with a high-frequency inductor L, and one end of two ends of the controller MCP K and the other end 8653 and the gas switch 8427;
the controller MCP controls the high voltage dc power source HVCD to charge the capacitor C1 through the current limiting resistor R1;
the controller MCP determines whether the charge of the capacitor C1 reaches a set value;
after judging whether the charging of the capacitor C1 reaches a set value, the controller MCP performs circuit control so that the wave modulation circuit L R establishes a loop with the high-frequency inductor L1 to simulate the oscillation potential difference of the analog ground platform SGP generating a high frequency;
the controller MCP performs circuit control to enable the wave modulation circuit L R to establish a loop with the current limiting resistor R2 so as to simulate and generate a ground impedance;
and the analog grounding platform SGP carries out tolerance measurement under different impedance change conditions.
Preferably, the controller MCP performing circuit control so that the wave modulation circuit L R establishes a loop with the high-frequency inductor L1 includes the controller MCP controlling the gas switch K1 to be turned on and the gas switch K2 to be turned off, so as to connect the capacitor C1, the wave modulation circuit L R, the analog ground platform SGP and the high-frequency inductor L1.
Preferably, the controller MCP performing circuit control so that the wave modulation circuit L R and the current limiting resistor R2 establish a loop includes that the controller MCP controls the gas switches K1 and K2 to be both turned on, so as to realize communication among the capacitor C1, the wave modulation circuit L R, the analog ground platform SGP, the high-frequency inductor L1 and the resistor R2.
Preferably, the analog ground platform SGP includes: shielding case, insulating platform, equalizer ring and voltage measurement device.
Preferably, the wave modulation circuit comprises at least two inductors and at least two resistors.
Preferably, the wave modulation circuit generates standard wave forms comprising current waves of 2.6/50us, 8/20us, 10/350us and 10/1000us or generates combined waves of 1.2/50us and 8/20 us.
Preferably, the energy storage capacitor C1 and the wave modulation circuit cooperate to establish waveforms with different parameters.
Preferably, the output voltage of the high voltage direct current power supply HVCD ranges from 25kV to 30 kV.
Preferably, the high-frequency inductor L1 is wound with high-frequency ferrite, and the inductance of the high-frequency inductor L1 ranges from 0.1uH to 4 uH.
Preferably, the present invention provides a test method for simulating a transient ground potential rise using a test circuit, wherein the test circuit comprises:
the controller MCP, the high-voltage direct current power supply HVCD, a capacitor C1, a high-frequency inductor L, a current-limiting resistor R1, a gas switch K1, a gas switch K2, a current-limiting resistor R2, a wave modulation circuit L R and an analog grounding platform SGP, wherein the analog grounding platform SGP is grounded through the high-frequency inductor L1, the high-voltage direct current power supply HVCD is connected with the capacitor C1 through the current-limiting resistor R1, the gas switch K1 can be communicated with the capacitor C1, the wave modulation circuit L R and the high-frequency inductor L, the gas switch K2 can be communicated with the capacitor C1, the wave modulation circuit L R, the high-frequency inductor L and the current-limiting resistor R2, the gas switch K9 is connected with the current-limiting resistor R2 in series to form a parallel circuit with the high-frequency inductor L, and one end of two ends of the controller MCP is connected with a gas switch K1 and the other end of the;
the method comprises the following steps:
controlling the high voltage direct current power supply HVCD to charge the capacitor C1 through the current limiting resistor R1;
determining whether the charge of the capacitor C1 reaches a set value;
after the capacitor C1 is judged to be charged to a set value, the control is performed so that the wave modulation circuit L R and the high-frequency inductor L1 establish a loop to simulate the oscillating potential difference of the analog ground platform generating high frequency;
the wave modulation circuit L R is controlled to establish a loop with the current limiting resistor R2 so as to simulate the ground impedance;
and (5) carrying out tolerance measurement under different impedance change conditions.
Preferably, the performing of the circuit control to enable the wave modulation circuit L R to establish a loop with the high-frequency inductor L1 includes controlling the gas switch K1 to be turned on and the gas switch K2 to be turned off, so as to connect the capacitor C1, the wave modulation circuit L R, the analog ground platform SGP and the high-frequency inductor L1.
Preferably, the circuit control for enabling the wave modulation circuit L R to establish a loop with the current limiting resistor R2 includes controlling the gas switches K1 and K2 to be both conductive, so as to realize the communication of the capacitor C1, the wave modulation circuit L R, the analog ground platform SGP, the high-frequency inductor L1 and the resistor R2.
Preferably, the analog ground platform SGP includes: shielding case, insulating platform, equalizer ring and voltage measurement device.
Preferably, the wave modulation circuit comprises at least two inductors and at least two resistors.
Preferably, the wave modulation circuit generates standard wave forms comprising current waves of 2.6/50us, 8/20us, 10/350us and 10/1000us or generates combined waves of 1.2/50us and 8/20 us.
Preferably, the capacitor C1 and the wave modulation circuit cooperate to establish waveforms of different parameters.
Preferably, the output voltage of the high voltage direct current power supply HVCD ranges from 25kV to 30 kV.
Preferably, the high-frequency inductor L1 is wound with high-frequency ferrite, and the inductance of the high-frequency inductor L1 ranges from 0.1uH to 4 uH.
According to the invention, through different grounding impedance changes, the phenomenon of potential rise at different stages of the analog grounding grid can be realized by controlling the conduction of different gas switches through the controller.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
FIG. 1 is a block diagram of a test system for simulating transient ground potential rise;
FIG. 2 is a schematic diagram of a simulated ground platform;
FIG. 3 is a diagram of exemplary waveforms of control timing and ground level rise of the controller;
FIG. 4 is a flow chart of a test method for simulating transient ground potential rise;
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a schematic diagram of a test system for simulating transient ground potential rise according to an embodiment of the present invention. As shown in fig. 1, the controller MCP controls the high voltage dc power source HVDC to charge the storage capacitor C1 via a current limiting resistor R1. In order to meet the requirements of the embodiment of the invention, the output capacity of the high-voltage direct current power supply HVDC is reasonably selected. If the output voltage of the direct current power supply HVDC is too high, such as higher than 30kV, the power supply is large in size, and the insulation cost of the system is increased. According to the embodiment of the invention, the output capacity of the DC power supply HVDC is selected to be 25kV-30kV, the ground potential can be increased by 10kV-15kV in the test system for simulating the transient ground potential increase, and the test system for simulating the transient ground potential increase realizes compact arrangement.
Preferably, as shown in FIG. 1, the controller MCP controls the energy storage capacitor C1 to charge to a set value, set t0The time reference time (the sequence is described in detail in figure 3) and at t0A trigger pulse is sent to the gas switch K1 from a reference time t0A start time Δ t1Time delay at t1At the moment, the gas switch K1 is completely turned on, and under the action of the rising edge of the impact current, the analog grounding platform SGP and the ground generate a high-frequency oscillation potential difference. Because the magnitude of the potential difference between the analog grounding platform SGP and the grounding grid is higher, a condition is created for the conduction of the gas switch K2. From a reference time t0A start time Δ t2Delayed, the controller MCP sends a trigger pulse to the gas switch K2, from Δ t2End time warp Δ t3Time delay, gas switch at t2Is fully on at all times. t is t1To t2The high frequency potential is increased.
Preferably, when the gas switch K1 is fully turned on (the gas switch K2 is in an open-close state), the current in the energy storage capacitor C1 passes through the wave modulation circuit L R and is communicated with the connected high-frequency inductor L1, and under the action of the rising edge of the impulse current, the analog ground platform SGP generates a high-frequency oscillation potential difference with the ground.
Preferably, the current in the energy storage capacitor C1 can cooperate with the parameters of the wave modulation circuit L R to complete the simulation test of the transient state ground potential under different impulse waveforms, referring to the common waveform formed by actual lightning, and by setting the parameters of the energy storage capacitor C1 and the wave modulation circuit L R, the wave modulation circuit can generate a current wave with standard waveforms including 2.6/50us, 8/20us, 10/350us and 10/1000us or a combined wave of 1.2/50us and 8/20 us.
Preferably, when the gas switch K2 is completely conducted (the gas switch K1 is still in a conducting state), the current in the energy storage capacitor C1 passes through the wave modulation circuit L R and is communicated with the connected high-voltage resistor R2, after the gas switch K2 is conducted, the arc simulates the spark discharge phenomenon in the grounding soil, the simulated grounding impedance is realized, meanwhile, the oscillation circuit is weakened, the wave shape is slowed down, the discharge loop formed by the capacitor C1 and the high-frequency inductor L1 is gradually turned to the discharge loop formed by the capacitor C1 and the resistor R2, the high-frequency inductor L1 is communicated with the resistor R2 in the discharge loop, and the oscillation circuit tends to be stable more easily.
The simulation grounding platform SGP comprises a shielding box, an insulating platform, an equalizing device and a high-voltage measuring device, wherein the shielding box is used for simulating an electronic equipment shell or a sensor mounting bracket, horizontal and vertical coupling of tested electronic equipment or a sensor is implemented, the insulating platform is used for simulating a transformer or a switch equipment shell, the voltage measuring device is used for measuring the voltage value of the electronic equipment or the sensor after the potential rises, and the influence of the voltage rising on the potential rising of the electronic equipment or the sensor is judged for the purpose of simulating the potential rising of the whole-time ground potential test.
Fig. 2 is a schematic structural diagram of an analog ground platform SGP, preferably, the analog ground platform SGP is grounded through a high-frequency inductor L1, the analog ground platform SGP includes a shielding box, an insulating platform, a grading ring and a high-voltage measuring device, the shielding box is used for simulating an electronic device housing or a sensor mounting bracket and simultaneously implementing horizontal and vertical coupling to an electronic device or a sensor to be tested, the insulating platform is used for simulating a transformer or a switchgear housing, and the voltage measuring device is used for measuring a voltage value of the electronic device or the sensor after a potential rises so as to determine an influence degree of the potential rise on the electronic device or the sensor.
Fig. 3 is a diagram of exemplary waveforms of control timing and ground level rise of the controller. Preferably, as shown in fig. 3, after the controller MCP controls the storage capacitor C1 to charge to the set value, t is set0Time reference time at t0A trigger pulse is sent to the gas switch K1 from a reference time t0A start time Δ t1Time delay at t1At the moment, the gas switch K1 is completely turned on, and under the action of the rising edge of the impact current, the analog grounding platform SGP and the ground generate a high-frequency oscillation potential difference. Because the magnitude of the potential difference between the analog grounding platform SGP and the grounding grid is higher, a condition is created for the conduction of the gas switch K2. From a reference time t0A start time Δ t2Delayed, the controller MCP sends a trigger pulse to the gas switch K2, from Δ t2End time warp Δ t3Time delay, gas switch at t2Is fully on at all times. t is t1To t2The high frequency potential is increased. From a reference time t0To get up to t2The time is a controllable time period value. Δ t1The time value of the air switch K1 is determined by the required trigger time and is an uncontrollable time period value; Δ t3The time value of the air switch K2 is determined by the required trigger time and is an uncontrollable time period value; Δ t2The time period value of (2) is determined by the characteristics of the waveform circuit and is a controllable time period value.
Fig. 4 is a flowchart of a test method for simulating a transient ground potential rise. Preferably, the step 401 controller MCP controls the high voltage dc power source HVCD to charge the energy storage capacitor C1 via the current limiting resistor R1 (described in detail in fig. 1). The controller MCP controls the high voltage dc power HVDC to charge the storage capacitor C1 via a current limiting resistor R1. In order to meet the requirements of the embodiment of the invention, the output capacity of the high-voltage direct current power supply HVDC is reasonably selected. If the output voltage of the direct current power supply HVDC is too high, such as higher than 30kV, the power supply is large in size, and the insulation cost of the system is increased. According to the embodiment of the invention, the output capacity of the DC power supply HVDC is selected to be 25kV-30kV, the ground potential can be increased by 10kV-15kV in the test system for simulating the transient ground potential increase, and the test system for simulating the transient ground potential increase realizes compact arrangement.
Preferably, step 402 determines whether the charge on capacitor C1 reaches a set value, and proceeds to step 403 when the controller MCP determines that the charge on capacitor C1 reaches the set value.
Preferably, in step 403, the controller MCP performs circuit control to make the wave modulation circuit L R and the high-frequency inductor L establish a loop to simulate the oscillating potential difference (described in detail in fig. 1) of the analog ground platform generating high frequency0The time reference time (the sequence is described in detail in figure 3) and at t0A trigger pulse is sent to the gas switch K1 from a reference time t0A start time Δ t1Time delay at t1At the moment, the gas switch K1 is completely turned on, and under the action of the rising edge of the impact current, the analog grounding platform SGP and the ground generate a high-frequency oscillation potential difference. Because the magnitude of the potential difference between the analog grounding platform SGP and the grounding grid is higher, a condition is created for the conduction of the gas switch K2. From a reference time t0A start time Δ t2Delayed, the controller MCP sends a trigger pulse to the gas switch K2, from Δ t2End time warp Δ t3Time delay, gas switch at t2Is fully on at all times. t is t1To t2The high frequency potential is increased.
Preferably, when the gas switch K1 is fully turned on (the gas switch K2 is in an open-close state), the current in the energy storage capacitor C1 passes through the wave modulation circuit L R and is communicated with the connected high-frequency inductor L1, and under the action of the rising edge of the impulse current, the analog ground platform SGP generates a high-frequency oscillation potential difference with the ground.
Preferably, in step 404, the controller MCP performs circuit control so that the wave modulation circuit L R and the current limiting resistor R2 establish a loop to simulate a ground impedance, preferably, when the gas switch K2 is fully turned on (the gas switch K1 still maintains a conducting state), a current in the energy storage capacitor C1 passes through the wave modulation circuit L R and is communicated with the connected high-voltage resistor R2, after the gas switch K2 is turned on, an arc simulates a spark discharge phenomenon in the ground soil to simulate the ground impedance, meanwhile, the oscillation circuit is weakened, the waveform is slowed down, a discharge loop formed by the capacitor C1 and the high-frequency inductor L1 gradually turns to a discharge loop formed by the capacitor C1 and the resistor R2, and the discharge loop is communicated with the resistor R2 from the high-frequency inductor L1.
Preferably, the analog grounding platform SGP is grounded through a high-frequency inductor L1, the high-frequency inductor L1 is formed by winding high-frequency ferrite, the inductance value of the high-frequency inductor L1 is selected from 0.1uH to 4uH, and different inductance values depend on waveform characteristic requirements.
Preferably, in step 405, the analog ground platform SGP includes a shielding box, an insulating platform, a grading ring, and a high voltage measuring device, the shielding box is used for simulating an electronic device housing or a sensor mounting bracket, and simultaneously implementing horizontal and vertical coupling to the tested electronic device or sensor, the insulating platform is used for simulating a transformer or a switchgear housing, and the voltage measuring device is used for measuring a voltage value of the electronic device or sensor after the potential rises, so as to determine the degree of influence of the potential rise on the electronic device or sensor. The test method for simulating the transient state ground potential rise completes the whole process of simulating the ground potential rise once.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (12)
1. A test system for simulating transient state ground potential rise comprises a controller MCP, a high-voltage direct current power supply HVCD, a capacitor C1, a high-frequency inductor L1, a current-limiting resistor R1, a gas switch K1, a gas switch K2, a current-limiting resistor R2, a wave modulation circuit L R and a simulation grounding platform SGP, wherein the simulation grounding platform SGP is grounded through the high-frequency inductor L1, the high-voltage direct current power supply HVCD is connected with the capacitor C1 and the gas switch K1 through the current-limiting resistor R1, the gas switch K2 and the current-limiting resistor R2 are connected in series to form a parallel circuit with the high-frequency inductor L1, and the controller MCP is used for controlling the connection or disconnection of the gas switch K1 and the gas switch K2;
the controller MCP controls the gas switch K1 and the gas switch K2 to be turned off, so that the high voltage direct current power source HVCD charges the capacitor C1 through the current limiting resistor R1;
the controller MCP is used for carrying out circuit control to enable the wave modulation circuit L R and the high-frequency inductor L1 to establish a loop to simulate the oscillation potential difference of high frequency generated by the analog grounding platform SGP after the capacitor C1 is charged to a set value, and the controller MCP is used for carrying out circuit control to enable the wave modulation circuit L R and the high-frequency inductor L1 to establish a loop, wherein the controller MCP controls the gas switch K1 to be conducted and the gas switch K2 to be disconnected to achieve the communication of the capacitor C1, the wave modulation circuit L R, the analog grounding platform SGP and the high-frequency inductor L1;
the controller MCP performs circuit control to enable the wave modulation circuit L R and the current limiting resistor R2 to establish a loop to generate a grounding impedance in a simulation mode, and the controller MCP performs circuit control to enable the wave modulation circuit L R and the current limiting resistor R2 to establish the loop comprises the controller MCP controls gas switches K1 and K2 to be conducted to achieve communication of a capacitor C1, the wave modulation circuit L R, an analog grounding platform SGP, a high-frequency inductor L1 and a resistor R2;
and the analog grounding platform SGP carries out tolerance measurement under different impedance change conditions.
2. The test system of claim 1, the Simulated Ground Platform (SGP) comprising: shielding case, insulating platform, equalizer ring and voltage measurement device.
3. The testing system of claim 1, the wave tuning circuit comprising at least two inductors and at least two resistors.
4. The testing system of claim 1, the wave-shaping circuit producing standard waveforms comprising current waves of 2.6/50us, 8/20us, 10/350us, 10/1000us, or producing a combination of waves of 1.2/50us, 8/20 us.
5. The testing system of claim 1, the capacitor C1 and the tuning circuit L R circuit cooperating to generate waveforms of different parameters.
6. The testing system of claim 1, wherein the HVCD output voltage of the high voltage DC power supply is in a range of 25kV to 30 kV.
7. The testing system of claim 1, wherein the high-frequency inductor L1 is made of high-frequency ferrite, and the inductance of the high-frequency inductor L1 ranges from 0.1uH to 4 uH.
8. A test method for simulating a transient ground potential rise using a test circuit, wherein the test circuit comprises:
the controller MCP, the high-voltage direct current power supply HVCD, a capacitor C1, a high-frequency inductor L, a current-limiting resistor R1, a gas switch K1, a gas switch K2, a current-limiting resistor R2, a wave modulation circuit L R and an analog grounding platform SGP, wherein the analog grounding platform SGP is grounded through the high-frequency inductor L1, the high-voltage direct current power supply HVCD is connected with the capacitor C1 through the current-limiting resistor R1, the gas switch K1 can be communicated with the capacitor C1, the wave modulation circuit L R and the high-frequency inductor L, the gas switch K2 can be communicated with the capacitor C1, the wave modulation circuit L R, the high-frequency inductor L and the current-limiting resistor R2, the gas switch K9 is connected with the current-limiting resistor R2 in series to form a parallel circuit with the high-frequency inductor L, and one end of two ends of the controller MCP is connected with a gas switch K1 and the other end of the;
the method comprises the following steps:
controlling the high-voltage direct current power supply HVCD to charge the energy storage capacitor C1 through the current-limiting resistor R1;
determining whether the charge of the capacitor C1 reaches a set value;
after the capacitor C1 is judged to be charged to reach a set value, the controller MCP is controlled to enable the wave modulation circuit L R and the high-frequency inductor L1 to establish a loop to simulate the oscillation potential difference of high frequency generated by the analog grounding platform, and the controller MCP is controlled to enable the wave modulation circuit L R and the high-frequency inductor L1 to establish the loop, wherein the controller MCP controls the gas switch K1 to be switched on and the gas switch K2 to be switched off to realize the communication of the capacitor C1, the wave modulation circuit L R, the analog grounding platform SGP and the high-frequency inductor L1;
the controller MCP performs circuit control to enable the wave modulation circuit L R and the current limiting resistor R2 to establish a loop, wherein the controller MCP controls gas switches K1 and K2 to be conducted to realize the communication of a capacitor C1, a wave modulation circuit L R, an analog grounding platform SGP, a high-frequency inductor L1 and a resistor R2;
and (5) carrying out tolerance measurement under different impedance change conditions.
9. The testing method of claim 8, the Simulated Ground Platform (SGP) comprising: shielding case, insulating platform, equalizer ring and voltage measurement device.
10. An assay method as claimed in claim 8, the wave tuning circuit comprising at least two inductors and at least two resistors.
11. The test method of claim 8, the wave modulation circuit generating standard waveforms comprising current waves of 2.6/50us, 8/20us, 10/350us, 10/1000us, or generating combined waves of 1.2/50us, 8/20 us.
12. The testing method of claim 8, the capacitor C1 and the wave-shaping circuit cooperating to create waveforms of different parameters.
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