CN104167927A - Transformer induced switching impulse voltage generation device triggered by IGBTs - Google Patents

Abstract

The invention discloses a transformer induced switching impulse voltage generation device triggered by IGBTs. The device comprises an AC power supply, a voltage regulator, a current-limiting resistor, a rectifier module, an IGBT module, a main capacitor and a transformer. The power supply charges the main capacitor through the IGBT module, and the IGBT module is turned on through triggering, so that the main capacitor discharges a primary side of the transformer; a switching impulse voltage is induced on a secondary side and measured by an impulse high-voltage bleeder, the impulse high-voltage bleeder is connected with an oscilloscope through a coaxial cable, and the waveform of the switching impulse voltage is displayed on the oscilloscope. By the adoption of the device, non-oscillating and oscillating switching impulse voltages can be generated; except the transformer and the bleeder, all the other components operate in a low-voltage environment, so that the generated voltage is low in dispersity, disruptive discharge signals are not generated, and the device is applicable to laboratories, especially to field. The device has the advantages of being easy to operate, convenient to move, accurate in waveform and applicable to field measurement and partial discharge measurement.

Description

The transformer induction operating impulse voltage generation device that a kind of IGBT triggers

Technical field

The present invention relates to impulse voltage generator technical field, relate to and utilize IGBT to trigger this research topic of inductive operation surge voltage.

Background technology

Power equipment, normally in service, not only needs to tolerate the power-frequency overvoltage under nominal situation, also needs often to tolerate lightning overvoltage and switching overvoltage, and therefore the surge voltage tolerance level of Site Detection power equipment is also very necessary.In standard GB/T 1094.3-2003, just specified that ceiling voltage is greater than the power transformer of 170kV, switching impulse test is routine test.Operating impulse voltage test is also the important component part in field test, in standard GB/T/T 16927.3-2010, clearly specify the waveform of surge voltage in device context handover procedure, not only traditional lightning impulse and operating impulse voltage are specified, also oscillatory surge voltage is defined.Norm standard DL/T 618 points out that operating impulse voltage test is more responsive to insulation defect in detection GIS, in carrying out AC voltage withstand test, can increase impulse voltage test.It is effective especially to checking the pollution and the anomalous electric field structure that exist in GIS that norm standard DL/T 555 middle fingers go out to operate impulse voltage test, is applicable to the GIS On-Site Testing of relative-high voltage rated.In addition for GIS equipment, also need to carry out the measurement of partial discharge, under various surge voltages, carry out measurement of partial discharge, also become one of conventional now important detection means.In sum, research is easy to the on-the-spot operating impulse voltage generation technology using and corresponding appliance arrangement thereof, and tool is of great significance.

Operating impulse voltage refers to that time to peak is greater than the surge voltage that 20 μ s, half time to peak are not more than 4000 μ s, and it is divided into non-oscillatory type and impacts and oscillation mode surge voltage.Non-oscillatory type switching impulse refers to that voltage rises to rapidly peak value, is then slowly reduced to dead-beat zero impact.And oscillation mode operating impulse voltage rises to rapidly peak value for voltage, be then accompanied by the damped oscillation of frequency range between 1kHz and 15kHz and be reduced to zero, wherein have or the reversion of no-voltage polarity.Time to peak T _prefer to that actual initial point arrives the time interval between the voltage peak moment; Half peak value time T ₂, for non-oscillatory type operating impulse voltage, be defined as actual initial point and voltage drop to the time interval between half peak value moment; For oscillation mode operating impulse voltage, the envelope that is defined as actual initial point and oscillation mode operating impulse voltage is reduced to the time interval between half peak value moment.

Conventionally, the impulse voltage generator in laboratory adopts Marx circuit, and the mode of multiple unit capacitor charged in parallel discharged in series produces impact, wherein uses and punctures sphere gap as the mode that triggers electric discharge.Such impulse voltage generator floor space is generally larger, difficult, and sphere gap puncture voltage is restive, and the waveform dispersiveness of generation is larger, and ball gap disruptive discharge meeting makes to measure partial discharge simultaneously and have any problem, and is difficult to adapt to the requirement of field test.

At present, the circuit that great majority research provides is all simpler, not about the studying in great detail of oscillating operation surge voltage, and still uses ball gap to trigger electric discharge.Both there is no the relation research of the waveform parameter of complete circuit element parameter and operating impulse voltage, do not replaced the research of ball gap aspect with electronic power switch yet.Therefore, be necessary to study Novel operating impulse voltage generator.

Summary of the invention

The object of the invention is in laboratory or the on-the-spot operating impulse voltage that produces, adopt the method for numerical computations, utilize program to calculate the circuit element parameter of generator.Adopt IGBT to impact as triggering the switch producing, utilize circuit to discharge to transformer primary side, induce operating impulse voltage at secondary.

The present invention solves by the following technical programs:

The transformer induction operating impulse voltage generation device that a kind of IGBT triggers, comprise: AC power (1), voltage regulator (2), current-limiting resistance (3), rectification module (4), IGBT module (5), main capacitance (9) and transformer (14), is characterized in that:

AC power (1) connects voltage regulator (2), and voltage regulator is carried out to 220V power supply;

The output voltage of voltage regulator is 0～1000V, described voltage regulator is connected with rectification module (4) by current-limiting resistance (3), described rectification module (4) further connects IGBT module (5), described IGBT module (5) further connects harmonic R-L-C module and main capacitance (9), and described harmonic R-L-C module is further connected with transformer primary side;

Wherein: described harmonic R-L-C module comprises wave front resistance (11), wave rear resistance (10), harmonic inductance (12) and harmonic electric capacity (13);

Described IGBT module (5) at least comprises an IGBT pipe (6) and the 2nd IGBT pipe (7);

Described device charges to main capacitance (9) by an IGBT pipe (6), main capacitance (9) after charging discharges to the former limit of described transformer (14) by the 2nd IGBT pipe (7) and described harmonic R-L-C module, and the secondary of described transformer is for inducing operating impulse voltage.

Preferably, described IGBT module (5) is controlled by drive circuit (8);

Described operating impulse voltage is measured by impulse high voltage voltage divider (15);

Described impulse high voltage voltage divider (15) is made up of high-voltage arm (17) and low-voltage arm (16), described impulse high voltage voltage divider connects oscilloscope (19) by coaxial cable (18), and the waveform of operating impulse voltage is shown by oscilloscope (19).

Preferably, a described IGBT pipe (6) and the 2nd IGBT pipe (7) are connected in series, and: the emitter of an IGBT pipe (6) connects the collector electrode (21) of the 2nd IGBT pipe (7), reverse parallel connection the first diode (29) between the emitter of an IGBT pipe (6) and collector electrode (23); Reverse parallel connection the second diode (28) between the emitter (22) of the 2nd IGBT pipe (7) and collector electrode (21).

Preferably, described IGBT module (5) service time is not more than 0.15 μ s, and the turn-off time is not more than 0.4 μ s, the time to peak T introducing thus _pwith half peak value time T ₂error be all not more than 0.75%, the one IGBT pipe (6) and the withstand voltage 1700V of being of the 2nd IGBT pipe (7), maximum by electric current 100A.

Preferably, for wave front resistance (11), wave rear resistance (10), harmonic inductance (12) and harmonic electric capacity (13), its required withstand voltage level is not more than 2 times of transformer primary side voltage peak;

By the adjusting of wave front resistance (11), wave rear resistance (10), harmonic inductance (12) and harmonic electric capacity (13) parameter value, to produce non-oscillatory operating impulse voltage and oscillating operation surge voltage.

Preferably, described IGBT drive circuit (8) is withstand voltage is 5kV, and service time is less than 0.67 μ s, and the turn-off time is less than 0.4 μ s, and the voltage change ratio of tolerance is 50kV/ μ s;

Described drive circuit is that binary channels is independently controlled flip-over type, in order to drive an IGBT pipe (6) and the 2nd IGBT pipe (7) simultaneously.

Preferably, by regulating the parameter of wave front resistance (11), wave rear resistance (10), harmonic inductance (12) and harmonic electric capacity (13), adjustable in 20～400 μ s with the operating impulse voltage time to peak that makes to produce, half time to peak is adjustable in 1000～4000 μ s

The present invention has following beneficial effect:

1) the present invention is when selecting transformer and voltage divider to be operated in 2kV when above, and volume weight is all less, convenient movement, and applicable field test; When field test, also can utilize on-the-spot transformer to produce operating impulse voltage.

2) in the present invention each resistance, electric capacity, inductance because its voltage withstand class is not high and cheap and volume is little, easy to adjust.

3) the present invention adopts IGBT to use as triggering the switch impacting, and there is no the disruptive discharge process of ball gap, the measurement of partial discharge can not affect operating impulse voltage test time.If further adopt IGBT drive circuit control break-make, very convenient, the noise while also not having ball gap to puncture.

4) the present invention not only can produce non-oscillatory operating impulse voltage, can also produce oscillating operation surge voltage.And according to circuit parameter calculation procedure regulating element, make the time to peak of operating impulse voltage and half peak value Time Continuous adjustable.

Brief description of the drawings

The system configuration schematic diagram of Fig. 1 one embodiment of the present of invention;

The IGBT module diagram of Fig. 2 one embodiment of the present of invention;

The IGBT drive circuit schematic diagram of Fig. 3 one embodiment of the present of invention;

The Analysis of Equivalent Circuit figure of the system configuration of Fig. 4 one embodiment of the present of invention;

The operating impulse voltage shape figure that Fig. 5 one embodiment of the present of invention produce.

Embodiment

Further described in detail below in conjunction with accompanying drawing;

As shown in Figure 1, the transformer induction operating impulse voltage generation device that a kind of IGBT triggers, comprise: AC power 1 connects voltage regulator 2, main capacitance 9 is charged by the control of first IGBT pipe 6 in IGBT module 5 by current-limiting resistance 3 and rectifier diode 4, after main capacitance charging, pass through again triggering and conducting IGBT pipe 7, by wave front resistance 11, wave rear resistance 10, harmonic inductance 12 and harmonic electric capacity 13, to the former limit electric discharge of transformer 14, induce operating impulse voltage at secondary.IGBT module is controlled by drive circuit 8.Operating impulse voltage is measured by impulse high voltage voltage divider 15, and it is made up of high-voltage arm 17 and low-voltage arm 16, connects oscilloscope 19 by coaxial cable 18, finally on oscilloscope 19, observes the waveform of operating impulse voltage.

Accompanying drawing 2 is IGBT modular structure figure, and inside is in series by two IGBT pipes, and for first IGBT pipe, 23 is collector electrode, and 21 is emitter, and 24 is base stage, and 25 is auxiliary emitter-base bandgap grading, and 29 is the diode with this pipe reverse parallel connection; Similarly, for second IGBT pipe, 21 is collector electrode, and 22 is emitter, and 26 is base stage, and 27 is auxiliary emitter-base bandgap grading, and 28 is the diode with this pipe reverse parallel connection.IGBT has that withstand voltage height, on-state through-current capability and off-state blocking ability are strong, switching speed is fast, be easy to the features such as controls, replaces ball gap as the switch discharging at step down side.

Accompanying drawing 3 is the driving circuit structure schematic diagram of IGBT module, whole drive circuit does power supply by DC power supply module 31,32,33 switches that are respectively passage A and B, 36,38 is A, B passage output module, the wherein IGBT pipe 6 in passage A respective figure 1, the IGBT pipe 7 in channel B respective figure 1.When channel switch closure, corresponding IGBT pipe conducting, when pipe shutoff of switch opens.By reference to the accompanying drawings 1, in the time keeping channel B switch 33 to disconnect, close passage A switch 32,6 conductings of IGBT pipe, power supply starts main capacitance C ₁charging, rear disconnection passage A switch 32 has charged; Now close passage B switch 33,7 conductings of IGBT pipe, main capacitance C ₁start, to the elementary electric discharge of transformer 14, can induce required operating impulse voltage at transformer secondary output.37 is output feedback module, and whether monitoring driving circuit normally works, if having extremely, and the replacement of entering line driving chip by protective circuit 34, protection drives chip and IGBT module.Driving chip 35 is cores of drive circuit, completes control, the function of motion of whole drive circuit.

Preferably, described rectifier diode is the withstand voltage voltage regulator crest voltage that is greater than oppositely, and current-limiting resistance resistance is greater than crest voltage divided by diode maximum current.

Preferably, have two pipes in described IGBT module, collection emitter-base bandgap grading is withstand voltage, the reverse withstand voltage voltage regulator crest voltage that is all greater than, and through-current capability is greater than 30A, and gate pole switching voltage is+15V.A pipe is as the switch of controlling charging, and another is as the switch that triggers electric discharge.

Preferably, described IGBT drive circuit employing+15V direct current supply, the break-make of voltage control IGBT pipe that can produce by switch ± 15V.

Preferably, described transformer is that gas-filled type is put transformer without office, and possesses: volume is little, and leakage inductance is little, the feature that magnetizing inductance is little.

In addition, the present invention has supporting calculation method of parameters, can accurately calculate easily the parameters such as wave regulating resistor, electric capacity, inductance value, guarantees that the waveform dispersiveness producing is little.In the time that test product is transformer, can directly utilize required wave regulating resistor, electric capacity, the inductance of calculation of parameter of the method and transformer, still according to the connection of system, directly utilize tested transformer to produce operating impulse voltage.

With regard to described computational methods: the relative reactance of resistance of considering Transformer Winding is all smaller, and leakage reactance is also smaller with respect to excitation reactance, and transformer just can be equivalent to Γ type circuit, suppose that the magnetizing inductance of the rear transformer of equivalence is L _m, in the time that main capacitance discharges to transformer primary side, the Analysis of Equivalent Circuit figure of whole system structure as shown in Figure 4, establishes: by magnetizing inductance L _melectric current be i _m, harmonic capacitor C ₂upper voltage is U ₂, the electric current passing through is i ₂, main capacitance C ₁upper voltage is U ₁, the electric current passing through is i ₁, be i by the electric current of harmonic inductance L _l, wave rear resistance R ₁upper electric current is i _r1, abbreviation can obtain the differential equation:

$\begin{array}{c}{\mathrm{LL}}_m{C}_1{C}_2\frac{d^4{i}_m}{{\mathrm{dt}}^4}+(C_1{C}_2{R}_2{L}_m+\frac{{\mathrm{LC}}_2{L}_m}{R_1})\frac{d^3{i}_m}{{\mathrm{dt}}^3}+({\mathrm{LC}}_1+L_m{C}_1+\\ \frac{L_m{C}_2{R}_2}{R_1}+L_m{C}_2)\frac{d^2{i}_m}{{\mathrm{dt}}^2}+(C_1{R}_2+\frac{L}{R_1}+\frac{L_m}{R_1})\frac{{\mathrm{di}}_m}{\mathrm{dt}}+\frac{R_2+R_1}{R_1}{i}_m=0\end{array}---\left(1\right)$

Wherein, initial condition is:

$\left\{\begin{array}{c}{i}_m{|}_{t=0}=0\\ \frac{{\mathrm{di}}_m}{\mathrm{dt}}{|}_{t=0}=0\\ \frac{d^2{i}_m}{{\mathrm{dt}}^2}{|}_{t=0}=0\\ \frac{d^3{i}_m}{{\mathrm{dt}}^3}{|}_{t=0}=\frac{U_0}{{\mathrm{LL}}_m{C}_2}\end{array}\right.---\left(2\right)$

Because circuit state equation is the 4 rank differential equations, cannot obtain clear and definite analytic solutions, the waveform peak that is more in no position to take possession of time T _p, half peak value time T ₂relational expression with circuit element parameter.Therefore the present invention adopts fourth-order Runge-Kutta method to solve this Initial Value Problems For Ordinary Differential Equations.Can turn to ordinary differential equation group by introducing intermediate variable for the differential equation (1) and solve,

y′＝Fy (3)

Wherein, y=(y ₁, y ₂, y ₃, y ₄) ^t, y '=(y ₁', y ₂', y ₃', y ₄') ^t

Coefficient matrix $F=\left[\begin{array}{cccc}0& 1& 0& 0\\ 0& 0& 1& 0\\ 0& 0& 0& 1\\ -\frac{e}{a}& -\frac{d}{a}& -\frac{c}{a}& -\frac{b}{a}\end{array}\right],y_0={(\mathrm{0,0,0},\frac{U_0}{{\mathrm{LL}}_m{C}_2})}^T$

$\left\{\begin{array}{c}a={\mathrm{LL}}_m{C}_1{C}_2\\ b=C_1{C}_2{R}_2{L}_m+\frac{{\mathrm{LC}}_2{L}_m}{R_1}\\ c={\mathrm{LC}}_1+L_m{C}_1+\frac{L_m{R}_1{R}_2}{R_1}+L_m{C}_2\\ d=C_1{R}_2+\frac{L}{R_1}+\frac{L_m}{R_1}\\ e=\frac{R_2+R_1}{R_1}\end{array}\right.---\left(4\right)$ $\left\{\begin{array}{c}{y}_1=i_m\\ {y_1}^{\′}=\frac{{\mathrm{di}}_m}{\mathrm{dt}}=y_2\\ {y_2}^{\′}=\frac{d^2{i}_m}{{\mathrm{dt}}^2}=y_3\\ {y_3}^{\′}=\frac{d^3{i}_m}{{\mathrm{dt}}^3}=y_4\\ {y_4}^{\′}=-\frac{b}{a}{y}_4-\frac{c}{a}{y}_3-\frac{d}{a}{y}_2-\frac{e}{a}{y}_1\end{array}\right.---\left(5\right)$

Like this, the fourth order Runge-Kutta formula of solving equation (1) is:

$\left\{\begin{array}{c}{y}_{i+1}=y_i+\frac{1}{6}(K_1+{2K}_2+{2K}_3+K_4)\\ K_1=\mathrm{hf}(t_i,y_i)\\ K_2=\mathrm{hf}(t_i+\frac{h}{2},y_i+\frac{1}{2}{K}_1)\\ K_3=\mathrm{hf}(t_i+\frac{h}{2},y_i+\frac{1}{2}{K}_2)\\ K_4=\mathrm{hf}(t_i+h,y_i+K_3)\end{array}\right.---\left(6\right)$

Obtained after y by above formula (6), can obtain transformer export target waveform and be:

$u_2=L_m\frac{{\mathrm{di}}_m}{\mathrm{dt}}=L_m{y}_2---\left(7\right)$

So just can obtain the wavy curve u of operating impulse voltage ₂.Be more than the analytic process of asking oscillating operation surge voltage shape, for non-oscillatory switching impulse, just equivalent electric circuit has lacked harmonic inductance L (being L=0), and circuit state equation is reduced to 3 rank, and analytical method is similar.

According to above-mentioned theory basis, the present invention has designed waveshape Method and circuits component parameters computational methods:

1) further, based on above-mentioned theory, for oscillating operation surge voltage, the waveshape step of oscillating operation surge voltage is as follows:

1.1) the time to peak T of the target waveform of setting oscillating operation surge voltage _pwith half peak value time T ₂;

1.2) set and calculate step-length h and max calculation step number, ignore leakage reactance and set described main capacitance C ₁, harmonic capacitor C ₂, wave rear resistance R ₁, wave front resistance R ₂, harmonic inductance L, and the magnetizing inductance L of transformer _mdevice parameter values;

1.3) according to the device parameter values of described setting, design factor matrix F, and initialization curve vector qx[], envelope vector blx[], maximum array jdz[], array y[], and intermediate variable array K1[], K2[], K3[], K4[];

1.4) described y[is calculated in stepping] and qx[], until qx[] zero passage or reach after the max calculation step number of initial setting, search qx[] in each maximum and its abscissa and qx[] position, end order deposits jdz[in] in; Then obtain jdz[with Laplace interpolation method] interpolat curve a little, i.e. envelope vector blx[], and obtain jdz[] each continuous distance between two points mean value reciprocal set it as frequency of oscillation freq;

1.5) search qx[] in maximum and blx[] trailing edge intermediate value, find step 1.2) time to peak and half time to peak of operating impulse voltage waveform in the device parameter values situation of described setting, corresponding;

1.6) change the device parameter values of described setting, recursive call above-mentioned steps 1.3) to 1.5), try to achieve in each device parameter values situation of organizing described setting, time to peak and half time to peak of corresponding operating impulse voltage waveform, and calculate the time to peak T of itself and target waveform _pwith half peak value time T ₂error S; According to acceptable error S, determine cycle-index, after end to be recycled, in gamut, find error minimum, obtain satisfactory described main capacitance C ₁, harmonic capacitor C ₂, wave rear resistance R ₁, wave front resistance R ₂, harmonic inductance L parameter value, obtain in the lump satisfactory operating impulse voltage curve, envelope curve, time to peak, half time to peak and frequency of oscillation simultaneously;

2) further, based on above-mentioned theory, for non-oscillatory operating impulse voltage, with above-mentioned 1) similar, just lack harmonic inductance L, concrete, the waveshape step of non-oscillatory operating impulse voltage is as follows:

2.1) the time to peak T of the target waveform of setting non-oscillatory operating impulse voltage _qwith half peak value time T ₃;

2.2) set and calculate step-length h and max calculation step number, ignore leakage reactance and set described main capacitance C ₁, harmonic capacitor C ₂, wave rear resistance R ₁, wave front resistance R ₂, and the magnetizing inductance L of transformer _mdevice parameter values;

2.3) according to the device parameter values of described setting, design factor matrix F, and initialization curve vector qx[], array y[], and intermediate variable array K1[], K2 ［ ］, K3[], K4[];

2.4) described y[is calculated in stepping] and qx[], until qx[] zero passage or reach after the max calculation step number of initial setting, search qx[] in maximum and trailing edge intermediate value, find step 2.2) time to peak and half time to peak of operating impulse voltage waveform in the device parameter values situation of described setting, corresponding;

2.5) change the device parameter values of described setting, recursive call above-mentioned steps 2.3) to 2.4), try to achieve in each device parameter values situation of organizing described setting, time to peak and half time to peak of corresponding operating impulse voltage waveform, and calculate the time to peak T of itself and target waveform _pwith half peak value time T ₂error S; According to acceptable error S, determine cycle-index, after end to be recycled, in gamut, find error minimum, obtain satisfactory described main capacitance C ₁, harmonic capacitor C ₂, wave rear resistance R ₁, wave front resistance R ₂parameter value, obtain in the lump satisfactory operating impulse voltage curve, time to peak, half time to peak simultaneously.

Further, in another embodiment, in order to shorten computing time, for above-mentioned 1) shown in the waveshape step of oscillating operation surge voltage:

Above-mentioned steps 1.2) replaced by following new alternative steps: set main capacitance value C ₁, static exciter inductance value L _m, wave rear resistance value R ₁, integrating step 1.1) and time to peak and half time to peak of switching impulse waveform of the target waveform set, estimate harmonic capacitor C ₂, harmonic inductance L (have L for oscillation mode operating impulse voltage, non-oscillatory type is without L) and wave front resistance R ₂span, in this span, set initial value and step-length and the max calculation step number of C2, R2 and L (if having L);

Corresponding, corresponding changing into just when initial " the changing the device parameter values of described setting " that will carry out of step 1.6: change C2, R2 and L (if having L), then all the other steps continue former step 1.6) subsequent action.

Further, in another embodiment, in order to shorten computing time, for above-mentioned 2) shown in the waveshape step of non-oscillatory operating impulse voltage be example:

Above-mentioned steps 2.2) replaced by following new alternative steps: set main capacitance value C ₁, static exciter inductance value L _m, wave rear resistance value R ₁, integrating step 2.1) and time to peak and half time to peak of switching impulse waveform of the target waveform set, estimate harmonic capacitor C ₂with wave front resistance R ₂span, in this span, set initial value and step-length and the max calculation step number of C2, R2;

Corresponding, step 2.5) initial " the changing the device parameter values of described setting " that will carry out time corresponding changing into just: change C2, R2, then all the other steps continue former step 2.6) subsequent action.

The operating impulse voltage shape typical waveform figure that accompanying drawing 5 produces for the present invention, as shown in Fig. 5 (a), that in figure, produce is non-oscillatory operating impulse voltage, its time to peak T _p=256 μ s, half peak value time T ₂=2611 μ s, meet standard-required completely.Shown in Fig. 5 (b), be oscillating operation surge voltage, its time to peak T _p=250 μ s, half peak value time T ₂=2395 μ s, also meet standard-required.

Above embodiment is only in order to illustrate the present invention and unrestricted technical scheme described in the invention; Although therefore this specification has been described in detail the present invention with reference to each above-mentioned embodiment, it will be understood by those of skill in the art that still and can modify or be equal to replacement the present invention; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, it all should be encompassed in claim scope of the present invention.

Claims (8)

1. the transformer induction operating impulse voltage generation device that IGBT triggers, comprise: AC power (1), voltage regulator (2), current-limiting resistance (3), rectification module (4), IGBT module (5), main capacitance (9) and transformer (14), is characterized in that:

AC power (1) connects voltage regulator (2), and voltage regulator is carried out to 220V power supply;

The output voltage of voltage regulator is 0～1000V, described voltage regulator is connected with rectification module (4) by current-limiting resistance (3), described rectification module (4) further connects IGBT module (5), described IGBT module (5) further connects harmonic R-L-C module and main capacitance (9), and described harmonic R-L-C module is further connected with transformer primary side;

Wherein: described harmonic R-L-C module comprises wave front resistance (11), wave rear resistance (10), harmonic inductance (12) and harmonic electric capacity (13);

Described IGBT module (5) at least comprises an IGBT pipe (6) and the 2nd IGBT pipe (7);

Described device charges to main capacitance (9) by an IGBT pipe (6), main capacitance (9) after charging discharges to the former limit of described transformer (14) by the 2nd IGBT pipe (7) and described harmonic R-L-C module, and the secondary of described transformer is for inducing operating impulse voltage.

2. device according to claim 1, is characterized in that:

Described IGBT module (5) is controlled by drive circuit (8);

Described operating impulse voltage is measured by impulse high voltage voltage divider (15);

Described impulse high voltage voltage divider (15) is made up of high-voltage arm (17) and low-voltage arm (16), described impulse high voltage voltage divider connects oscilloscope (19) by coaxial cable (18), and the waveform of operating impulse voltage is shown by oscilloscope (19).

3. device according to claim 1, preferred, it is characterized in that:

A described IGBT pipe (6) and the 2nd IGBT pipe (7) are connected in series, and: the emitter of an IGBT pipe (6) connects the collector electrode (21) of the 2nd IGBT pipe (7), reverse parallel connection the first diode (29) between the emitter of an IGBT pipe (6) and collector electrode (23); Reverse parallel connection the second diode (28) between the emitter (22) of the 2nd IGBT pipe (7) and collector electrode (21).

4. device according to claim 1, is characterized in that:

Described IGBT module (5) service time is not more than 0.15 μ s, and the turn-off time is not more than 0.4 μ s, the time to peak T introducing thus _pwith half peak value time T ₂error be all not more than 0.75%, the one IGBT pipe (6) and the withstand voltage 1700V of being of the 2nd IGBT pipe (7), maximum by electric current 100A.

5. device according to claim 1, is characterized in that:

For wave front resistance (11), wave rear resistance (10), harmonic inductance (12) and harmonic electric capacity (13), its required withstand voltage level is not more than 2 times of transformer primary side voltage peak;

By the adjusting of wave front resistance (11), wave rear resistance (10), harmonic inductance (12) and harmonic electric capacity (13) parameter value, to produce non-oscillatory operating impulse voltage and oscillating operation surge voltage.

6. device according to claim 2, is characterized in that:

Described IGBT drive circuit (8) is withstand voltage is 5kV, and service time is less than 0.67 μ s, and the turn-off time is less than 0.4 μ s, and the voltage change ratio of tolerance is 50kV/ μ s;

Described drive circuit is that binary channels is independently controlled flip-over type, in order to drive an IGBT pipe (6) and the 2nd IGBT pipe (7) simultaneously.

7. device according to claim 5, is characterized in that:

Preferably, by regulating the parameter of wave front resistance (11), wave rear resistance (10), harmonic inductance (12) and harmonic electric capacity (13), adjustable in 20～400 μ s with the operating impulse voltage time to peak that makes to produce, half time to peak is adjustable in 1000～4000 μ s.

8. device according to claim 5, is characterized in that:

For the adjusting of described parameter value, the relative reactance of resistance of considering Transformer Winding is all smaller, and leakage reactance is also smaller with respect to excitation reactance, transformer just can be equivalent to Γ type circuit, in the time that main capacitance discharges to transformer primary side, suppose that in the circuit of now equivalence, the magnetizing inductance of transformer is L _m, establish: by magnetizing inductance L _melectric current be i _m, harmonic electric capacity is C ₂, main capacitance is C ₁, harmonic inductance is L, wave rear resistance is R ₁, wave front resistance is R ₂, the differential equation that obtains equivalent circuit is as follows:

$\begin{array}{c}{\mathrm{LL}}_m{C}_1{C}_2\frac{d^4{i}_m}{{\mathrm{dt}}^4}+(C_1{C}_2{R}_2{L}_m+\frac{{\mathrm{LC}}_2{L}_m}{R_1})\frac{d^3{i}_m}{{\mathrm{dt}}^3}+({\mathrm{LC}}_1+L_m{C}_1+\\ \frac{L_m{C}_2{R}_2}{R_1}+L_m{C}_2)\frac{d^2{i}_m}{{\mathrm{dt}}^2}+(C_1{R}_2+\frac{L}{R_1}+\frac{L_m}{R_1})\frac{{\mathrm{di}}_m}{\mathrm{dt}}+\frac{R_2+R_1}{R_1}{i}_m=0\end{array}---\left(1\right)$

Wherein, initial condition is:

$\left\{\begin{array}{c}{i}_m{|}_{t=0}=0\\ \frac{{\mathrm{di}}_m}{\mathrm{dt}}{|}_{t=0}=0\\ \frac{d^2{i}_m}{{\mathrm{dt}}^2}{|}_{t=0}=0\\ \frac{d^3{i}_m}{{\mathrm{dt}}^3}{|}_{t=0}=\frac{U_0}{{\mathrm{LL}}_m{C}_2}\end{array}\right.---\left(2\right)$

Can turn to ordinary differential equation group by introducing intermediate variable for the differential equation (1) and solve,

y′＝Fy (3)

Wherein, y=(y ₁, y ₂, y ₃, y ₄) ^t, y '=(y ₁', y ₂', y ₃', y ₄') ^t

Coefficient matrix $F=\left[\begin{array}{cccc}0& 1& 0& 0\\ 0& 0& 1& 0\\ 0& 0& 0& 1\\ -\frac{e}{a}& -\frac{d}{a}& -\frac{c}{a}& -\frac{b}{a}\end{array}\right],y_0={(\mathrm{0,0,0},\frac{U_0}{{\mathrm{LL}}_m{C}_2})}^T$

$\left\{\begin{array}{c}a={\mathrm{LL}}_m{C}_1{C}_2\\ b=C_1{C}_2{R}_2{L}_m+\frac{{\mathrm{LC}}_2{L}_m}{R_1}\\ c={\mathrm{LC}}_1+L_m{C}_1+\frac{L_m{R}_1{R}_2}{R_1}+L_m{C}_2\\ d=C_1{R}_2+\frac{L}{R_1}+\frac{L_m}{R_1}\\ e=\frac{R_2+R_1}{R_1}\end{array}\right.---\left(4\right)$ $\left\{\begin{array}{c}{y}_1=i_m\\ {y_1}^{\′}=\frac{{\mathrm{di}}_m}{\mathrm{dt}}=y_2\\ {y_2}^{\′}=\frac{d^2{i}_m}{{\mathrm{dt}}^2}=y_3\\ {y_3}^{\′}=\frac{d^3{i}_m}{{\mathrm{dt}}^3}=y_4\\ {y_4}^{\′}=-\frac{b}{a}{y}_4-\frac{c}{a}{y}_3-\frac{d}{a}{y}_2-\frac{e}{a}{y}_1\end{array}\right.---\left(5\right)$

Like this, the fourth order Runge-Kutta formula of solving equation (1) is:

$\left\{\begin{array}{c}{y}_{i+1}=y_i+\frac{1}{6}(K_1+{2K}_2+{2K}_3+K_4)\\ K_1=\mathrm{hf}(t_i,y_i)\\ K_2=\mathrm{hf}(t_i+\frac{h}{2},y_i+\frac{1}{2}{K}_1)\\ K_3=\mathrm{hf}(t_i+\frac{h}{2},y_i+\frac{1}{2}{K}_2)\\ K_4=\mathrm{hf}(t_i+h,y_i+K_3)\end{array}\right.---\left(6\right)$

Obtained after y by above formula (6), can obtain the wavy curve u of the operating impulse voltage of transformer output ₂:

$u_2=L_m\frac{{\mathrm{di}}_m}{\mathrm{dt}}=L_m{y}_2---\left(7\right)$

1) further, based on above-mentioned theory, for oscillating operation surge voltage, the waveshape step of oscillating operation surge voltage is as follows:

1.1) the time to peak T of the target waveform of setting oscillating operation surge voltage _pwith half peak value time T ₂;

1.2) set and calculate step-length h and max calculation step number, ignore leakage reactance and set described main capacitance C ₁, harmonic capacitor C ₂, wave rear resistance R ₁, wave front resistance R ₂, harmonic inductance L, and the magnetizing inductance L of transformer _mdevice parameter values;

1.3) according to the device parameter values of described setting, design factor matrix F, and initialization curve vector qx[], envelope vector blx[], maximum array jdz[], array y[], and intermediate variable array K1[], K2[], K3[], K4[];

1.4) described y[is calculated in stepping] and qx[], until qx[] zero passage or reach after the max calculation step number of initial setting, search qx[] in each maximum and its abscissa and qx[] position, end order deposits jdz[in] in; Then obtain jdz[with Laplace interpolation method] interpolat curve a little, i.e. envelope vector blx[], and obtain jdz[] each continuous distance between two points mean value reciprocal set it as frequency of oscillation freq;

1.5) search qx[] in maximum and blx[] trailing edge intermediate value, find step 1.2) time to peak and half time to peak of operating impulse voltage waveform in the device parameter values situation of described setting, corresponding;

1.6) change the device parameter values of described setting, recursive call above-mentioned steps 1.2) to 1.5), try to achieve in each device parameter values situation of organizing described setting, time to peak and half time to peak of corresponding operating impulse voltage waveform, and calculate the time to peak T of itself and target waveform _pwith half peak value time T ₂error S; According to acceptable error S, determine cycle-index, after end to be recycled, in gamut, find error minimum, obtain satisfactory described main capacitance C ₁, harmonic capacitor C ₂, wave rear resistance R ₁, wave front resistance R ₂, harmonic inductance L parameter value, obtain in the lump satisfactory operating impulse voltage curve, envelope curve, time to peak, half time to peak and frequency of oscillation simultaneously;

2) further, based on above-mentioned theory, for non-oscillatory operating impulse voltage, with above-mentioned 1) similar, just variable has lacked harmonic inductance L, and concrete, the waveshape step of non-oscillatory operating impulse voltage is as follows:

2.1) the time to peak T of the target waveform of setting non-oscillatory operating impulse voltage _qwith half peak value time T ₃;

2.2) set and calculate step-length h and max calculation step number, ignore leakage reactance and set described main capacitance C ₁, harmonic capacitor C ₂, wave rear resistance R ₁, wave front resistance R ₂, and the magnetizing inductance L of transformer _mdevice parameter values;

2.3) according to the device parameter values of described setting, design factor matrix F, and initialization curve vector qx[], array y[], and intermediate variable array K1[], K2[], K3[], K4[];

2.4) described y[is calculated in stepping] and qx[], until qx[] zero passage or reach after the max calculation step number of initial setting, search qx[] in maximum and trailing edge intermediate value, find step 2.2) time to peak and half time to peak of operating impulse voltage waveform in the device parameter values situation of described setting, corresponding;

2.5) change the device parameter values of described setting, recursive call above-mentioned steps 2.2) to 2.4), try to achieve in each device parameter values situation of organizing described setting, time to peak and half time to peak of corresponding operating impulse voltage waveform, and calculate the time to peak T of itself and target waveform _pwith half peak value time T ₂error S; According to acceptable error S, determine cycle-index, after end to be recycled, in gamut, find error minimum, obtain satisfactory described main capacitance C ₁, harmonic capacitor C ₂, wave rear resistance R ₁, wave front resistance R ₂parameter value, obtain in the lump satisfactory operating impulse voltage curve, time to peak, half time to peak simultaneously.