CN113872571B - Programmable hundred kV high-voltage pulse generation system based on time delay control - Google Patents
Programmable hundred kV high-voltage pulse generation system based on time delay control Download PDFInfo
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- H—ELECTRICITY
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- H03K3/57—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device
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Abstract
The invention belongs to the technical field of power synthesis, and provides a programmable hundred kV high-voltage pulse generation system based on delay control, wherein each path of trigger control signal output port of a trigger control system is connected with a trigger signal input port of each pulse source unit so as to realize the trigger control and delay setting functions of the trigger control system on the pulse source units; the high-voltage pulse signal output port of each pulse source unit is connected with the input port of the power synthesizer to realize the synthesis of multi-path high-voltage pulse signals; the power synthesizer adopts a multi-stage cascade connection mode to carry out combination connection, the total number of input ports of the first-stage power synthesizer is the same as the total number of pulse source units, hundred-way-level high-voltage pulse signal synthesis is realized, and the final-stage power synthesizer finally outputs target-voltage pulse signals. The invention has simple structure, and the trigger control system ensures that the output pulse waveform has better stability and can meet the completeness requirement of the vulnerability assessment of the strong electromagnetic pulse environment of the system.
Description
Technical Field
The invention belongs to the technical field of power synthesis, and particularly relates to a programmable hundred kV-level high-voltage pulse generation method.
Background
With the increasing complexity of the future electromagnetic environment, the vulnerability problem of information systems such as national power grid, internet and the like in a strong electromagnetic pulse environment becomes more and more prominent. At present, the generation sources of strong electromagnetic pulse environments are considered to mainly comprise ultra-wideband electromagnetic pulses (UWS-EMP), and the maximum spectrum coverage range of the ultra-wideband electromagnetic pulses is from tens of megahertz to several gigahertz; nuclear electromagnetic pulses (NEMPs) with spectral coverage ranging from a few hertz to hundreds of megahertz; lightning strike electromagnetic pulses (LEMP) with a spectral coverage range from several hundred hertz to several megahertz. Therefore, in order to check the vulnerability of the strong electromagnetic pulse environment of the system, an examination test must be performed in the corresponding strong field environment. The high-voltage pulse source is core equipment of a strong electromagnetic pulse environment generation system, and has the technical requirements on the high-voltage pulse source, on one hand, the output amplitude of the high-voltage pulse source needs to be as high as possible, and is usually in the order of hundred kV or even MV; on the other hand, from the aspect of completeness of constructing the strong electromagnetic pulse environment, the waveform parameters are also required to be flexibly adjusted, so that the actual strong electromagnetic pulse environment can be simulated.
Generally, the high-voltage electromagnetic pulse is generated in a plurality of ways, and the main generation ways are as follows: pulse sources based on Marx and high-voltage gas switches, SOS (Semiconductor Opening Switch) pulse sources based on SOS (Semiconductor Opening Switch) pulse sources, avalanche transistor based pulse sources. For a pulse source based on Marx and a high-voltage gas switch, the pulse source has the greatest advantages that high-voltage electromagnetic pulses of hundred kV or even MV magnitude can be generated, but the pulse source is insufficient to make the peak value of the output pulse of the high-voltage gas switch appear randomness on one hand, on the other hand, the shape of the pulse is difficult to control well, the repetition frequency of a system is more than hundred Hz, and in addition, the problem of power capacity of the system is also the reason for limiting the power lifting of the system; for SOS (Semiconductor Opening Switch) -based pulse sources, they can generate high-power, high-repetition frequency electromagnetic pulses, but the switching speed of SOS is relatively slow, making ns-level fast-leading pulses difficult. The pulse source based on the avalanche transistor has the advantages that fast leading-edge pulses with high repetition frequency and good stability can be generated, but the pulse source is not enough to realize effective adjustment of the waveform of the pulse, and the output amplitude of a single pulse source is in kV magnitude, so that the radiation factor of a system is generally improved in a space synthesis mode. In addition, the conventional arbitrary waveform generator is one of the most widely applied general instruments in the field of modern electronic testing, and the waveform file in the memory is converted into an actual waveform signal by using a high-speed DAC, so that the waveform file can be flexibly customized by a user. However, the main disadvantage of the device is that the amplitude of the output signal is low, generally in V magnitude, and the requirement of the strong electromagnetic pulse examination test can not be met.
In summary, the existing pulse generation method has the defect that the waveform parameters cannot be adjusted, or the problem that the waveform is adjustable but the output amplitude is too low, so that the completeness requirement of the vulnerability assessment of the strong electromagnetic pulse environment of the existing system is difficult to meet.
Disclosure of Invention
The invention aims to provide a programmable high-voltage pulse generation system based on delay control, which solves the technical problems that the waveform of the output pulse of the existing high-voltage pulse source is difficult to adjust and the stability is insufficient.
The specific technical scheme of the invention is as follows:
a programmable hundred kV high-voltage pulse generation system based on delay control comprises a trigger control system, a pulse source unit and a power synthesizer;
Each path of trigger control signal output port of the trigger control system is connected with the trigger signal input port of each pulse source unit so as to realize the trigger control and delay setting functions of the trigger control system on the pulse source units; the high-voltage pulse signal output port of each pulse source unit is connected with the input port of the power synthesizer to realize the synthesis of multi-path high-voltage pulse signals; the power synthesizer adopts a multi-stage cascade connection mode to carry out combination connection, the total number of input ports of the first-stage power synthesizer is the same as the total number of pulse source units, hundred-way-level high-voltage pulse signal synthesis is realized, and the final-stage power synthesizer finally outputs target-voltage pulse signals.
The trigger control system is used for programming a delay control chip in the system, calculating according to the target high-voltage pulse waveform parameters to obtain delay setting sequences of the pulse source units, generating target high-voltage pulses after pulse synthesis after the delay setting sequences obtained by programming calculation are used for setting the delay of the pulse source units, outputting a plurality of paths of trigger control signals with set delay, and setting the delay of the pulse signals output by the pulse source units in an external trigger control mode.
Further, the pulse source unit is a solid-state pulse generator for generating a kV-level subnanosecond pulse signal.
Further, the number of the pulse source units determines waveform parameters of the synthesized high-voltage pulse, and the higher the number of the pulse source units is, the higher the amplitude of the synthesized high-voltage pulse is, the larger the adjusting range of the pulse waveform parameters is, the more high-voltage pulse types can be generated, and the smoother and more continuous pulse waveforms are generated.
Further, the power combiner should have high power capacity, better insertion loss and higher port isolation, realize the combination of high voltage pulses and have higher combination efficiency.
Further, the number of stages of the multi-stage cascade and the number of paths of the power combiner can be flexibly selected and combined, and the method is not particularly limited.
The effective benefits of the invention are as follows:
1. The programmable hundred kV high-voltage pulse generation system based on time delay control has the advantages of three aspects, namely, the solid-state pulse source is adopted as a synthesis unit, and the advantage of stable waveform parameters output by the solid-state pulse source is fully utilized; under the condition of synchronous output of a plurality of kV-level pulse sources, the synthesized high-voltage pulse amplitude can reach more than hundred kV, so that the requirement on the pulse source amplitude in the strong electromagnetic pulse examination is met; and thirdly, by accurately controlling the triggering time of a plurality of kV-level pulse sources, the fine adjustment of the synthesized pulse waveform can be realized, so that the actual possible strong electromagnetic pulse environment can be simulated, and the completeness of system parameter coverage is effectively improved.
2. The invention can carry out programming calculation according to the required target high-voltage pulse parameters to obtain a delay setting numerical sequence related to the pulse source units, and delay setting is carried out on each pulse source unit through a trigger control system, each path of high-voltage pulse is synthesized by a power synthesizer and then output to obtain the required target high-voltage pulse, so that the control and adjustment of the output pulse waveform can be realized, and the output of high-repetition frequency pulse can also be realized;
3. The invention can flexibly select the synthesis path number to realize the generation of hundred kV to MV high-voltage pulses in a multi-stage multi-path power synthesis mode;
4. The invention is simpler to realize on the system structure, the high-precision trigger control system enables the output pulse waveform to have better stability, and the completeness requirement of the vulnerability assessment of the strong electromagnetic pulse environment of the system can be met.
Drawings
FIG. 1 is a block diagram of a system architecture of the present invention;
FIG. 2 is a schematic diagram of hundred kV high voltage pulse generation;
FIG. 3 is a graph showing the results of generating a high peak pulse waveform in accordance with one embodiment of the present invention;
FIG. 4 is a graph of the results of implementing pulse waveform stretching in an embodiment of the present invention;
FIG. 5 is a graph showing the result of generating a square wave signal using unipolar pulses in an embodiment of the present invention;
FIG. 6 is a graph showing the results of generating bipolar pulses using unipolar pulses in an embodiment of the present invention;
FIG. 7 is a graph of the result of generating high repetition frequency pulses in an embodiment of the invention.
Detailed Description
The invention is illustrated and described in detail below with reference to the attached drawings and specific embodiments.
The invention provides a programmable high-voltage pulse source generation system based on delay control, which is shown in a system structure block diagram as shown in figure 1 and comprises a pulse source unit, a trigger control system and a power synthesizer.
The pulse source unit outputs a kV-level high-voltage pulse signal; the trigger control system realizes trigger control and delay setting of each pulse source unit; and the power synthesizer synthesizes the multipath kV-level high-voltage pulse signals.
The pulse source units are solid-state pulse generators capable of generating kV-level and subnanosecond-level pulse signals, the number of the pulse source units determines waveform parameters for synthesizing high-voltage pulses, and the higher the number of the pulse source units is, the higher the amplitude of the synthesized high-voltage pulses is, the larger the adjusting range of the pulse waveform parameters is, the more high-voltage pulse types can be generated, and the pulse waveforms are smoother and more continuous;
the trigger control system is used for realizing high-precision trigger control and delay setting, a delay chip is arranged in the trigger control system, the trigger control system calculates delay setting sequences of pulse source units according to target voltage pulse waveform parameters (parameters such as amplitude, pulse width and the like) by programming the delay control chip, outputs a plurality of paths of trigger control signals with set delay, and realizes setting of delay of output pulse signals of the pulse source units in an external trigger control mode.
The power combiner has high power capacity, better insertion loss and higher port isolation, and can not only realize the combination of high-voltage pulses, but also have higher combination efficiency. The power synthesizer has more energy loss in multi-stage cascade use, and is generally selected to be lower than that of four-stage cascade, so that the mode with fewer cascade numbers and more single power synthesizer channels is selected when multi-stage synthesis is adopted to generate high-voltage pulse, and the mode of multi-stage synthesis in the specific implementation process is more selected, for example, hundred-stage synthesis can be realized by adopting ten-stage power synthesizers for two-stage synthesis. When the power combiner is used for multi-stage cascading combination, the total number of input ports of the first-stage power combiner is the same as the total number of pulse source units.
The basic principle and the working process of the invention are as follows:
Each pulse source unit generates a kV-level subnanosecond-level high-voltage pulse signal, a trigger control system sets delay for each path of pulse signal and outputs a multi-path trigger control signal to trigger the pulse source, and finally, a power synthesizer synthesizes the pulse source and outputs synthesized pulses to obtain the hundred kV-level high-voltage pulse source.
The combined number relation among the pulse source unit, the trigger control system and the power synthesizer is as follows: taking two-stage cascade high-voltage pulse synthesis as an example, as shown in fig. 2, the first stage is an M-path power synthesizer (M is more than or equal to 2), the number of the first stage is N, the second stage is an N-path power synthesizer, and the number of the second stage is 1, and the total synthesized path number is M; the number of the pulse source units is the same as the total number of the synthesis paths, and the number is M; the trigger control system needs to output M-N paths of trigger control signals to realize trigger and delay control of each pulse source unit. Similarly, in the multistage cascade (the number of stages is more than 2) high-voltage pulse synthesis, the total number of the synthesis paths is Q, the first stage is M paths of power synthesizers (M is more than or equal to 2), and the number is N, so that Q=M is equal to N; the number of the synthesis paths of the second-stage power synthesizer is P, N can be divided by P, the result of the division is the number of the second-stage power synthesizer, and the number of the synthesis paths of the power synthesizer of other stages can be obtained in the same way; the total number Q of the synthesis paths is equal to the multiplication of the synthesis paths of the power synthesizers of each stage, the number of the pulse source units is Q, and the trigger control system needs to output Q paths of trigger control signals. The number of synthesis stages and the number of paths of the power synthesizer can be flexibly selected and combined, and the invention is not particularly limited.
The connection control relation among the pulse source unit, the trigger control system and the power synthesizer is as follows: each path of trigger control signal output port of the trigger control system is connected with the trigger signal input port of each pulse source unit so as to realize the trigger control and delay setting functions of the trigger control system on the pulse source units; the high-voltage pulse signal output port of each pulse source unit is connected with the input port of the power synthesizer to realize the synthesis of multi-path high-voltage pulse signals; the power synthesizer can be connected in a combined mode in a multistage cascade mode to realize hundred-way high-voltage pulse signal synthesis, and the final power synthesizer finally outputs a target-voltage pulse signal.
The method comprises the following specific steps:
step 1, programming a delay chip through a trigger control system according to a target high-voltage pulse waveform parameter which is required to be obtained, and setting delay for each pulse source unit according to the delay setting sequence obtained by calculation in the trigger control system after calculating the delay setting sequence of each path of high-voltage pulse signal;
Step 2, the trigger control system starts to work, a trigger control signal with a set time delay is output to trigger each pulse source unit, and each pulse source unit receives the trigger signal from the trigger control system and then outputs a high-voltage pulse signal with the set time delay;
And 3, outputting high-voltage pulse signals by each pulse source unit, and outputting the high-voltage pulse signals after synthesizing by a multi-stage multipath power synthesizer to obtain target-voltage pulse signals.
The invention is illustrated by the following examples, which are given by way of further illustration:
example 1:
the delay of each path is set to be 0 through a trigger control system, each pulse source unit is synchronously triggered, the high-voltage pulse is obtained after the multi-path pulse signals pass through a power synthesizer, the high-voltage pulse obtained in the mode has the characteristic of high amplitude, the number of pulse synthesis paths is increased, the output amplitude is correspondingly improved, as shown in fig. 3, the output high-voltage pulse amplitude is greatly improved compared with the synthesized pulse amplitude, and meanwhile, the output high-voltage pulse has better stability.
Example 2:
The trigger control system sets delay for each path of high-voltage pulse signal and triggers each pulse source unit, each pulse source unit outputs high-voltage pulse signals with different delay, and multiple paths of pulse signals are synthesized by the power synthesizer and then output, as shown in fig. 4, the form can realize the output of adjustable high-voltage pulse waveform, such as adjusting waveform parameters of amplitude, pulse width and the like of the output high-voltage pulse; as shown in fig. 5, this form may also generate a plurality of pulse signals, for example, a plurality of single-stage narrow pulses are used for performing a time-delay sequence combination arrangement, and a square wave signal may be output after being synthesized by a power synthesizer, where the pulse width of the square wave signal may be adjusted according to the number of single-stage pulse paths.
Example 3:
by adding inverters at the output ends of one half of pulse source units, the trigger control system sets delay for the corresponding one half of pulse source units and triggers each pulse source unit, and then the multi-channel single-stage pulse can be synthesized by the power synthesizer to output high-peak bipolar pulse, as shown in fig. 6, and the obtained bipolar pulse has good pulse characteristics.
Example 4:
The single-pole pulse base width value is used as a tolerance, the trigger control system sequentially sets time delay (the tolerance value is the single-pole pulse base width) for each path of high-voltage pulse signal in an equidifferent sequence, each pulse source unit is triggered, and the multi-path high-voltage pulse signal can output high-repetition frequency high-voltage pulse after being synthesized by the power synthesizer, as shown in fig. 7, and the output pulse has the characteristics of high repetition frequency and high amplitude.
The above is only a preferred embodiment of the present invention, and it should be noted that the above-described preferred embodiment should not be construed as limiting the present invention. Any improvements, modifications, equivalents, and so forth that do not depart from the spirit and scope of the invention are intended to be within the scope of the invention.
Claims (6)
1. The programming hundred kV-level high-voltage pulse generation system based on time delay control is characterized by comprising a trigger control system, a pulse source unit and a power synthesizer;
each path of trigger control signal output port of the trigger control system is connected with the trigger signal input port of each pulse source unit so as to realize the trigger control and delay setting functions of the trigger control system on the pulse source units; the high-voltage pulse signal output port of each pulse source unit is connected with the input port of the power synthesizer to realize the synthesis of multi-path high-voltage pulse signals; the power synthesizer adopts a multi-stage cascade connection mode to carry out combined connection, the total number of input ports of the first-stage power synthesizer is the same as the total number of pulse source units, and the final-stage power synthesizer finally outputs target-voltage pulse signals to realize hundred-way-level high-voltage pulse signal synthesis;
The trigger control system is used for realizing high-precision trigger control and delay setting, a delay chip is arranged in the trigger control system, the trigger control system obtains a delay setting sequence for each pulse source unit according to target high-voltage pulse waveform parameter calculation through programming the delay control chip, outputs a plurality of paths of trigger control signals with set delay, and realizes setting of delay of output pulse signals of each pulse unit in an external trigger control mode.
2. A programmed hundred kV high voltage pulse generation system based on time delay control according to claim 1, wherein the pulse source unit is a solid state pulse generator that generates kV-level, sub-nanosecond level pulse signals.
3. The programmable hundred kV high-voltage pulse generation system based on time delay control according to claim 2, wherein the number of the pulse source units determines waveform parameters of synthesized high-voltage pulses, and the higher the number of the pulse source units is, the higher the amplitude of the synthesized high-voltage pulses is, the larger the adjusting range of the waveform parameters is, the more types of the generated high-voltage pulses are, and the smoother and more continuous pulse waveforms are.
4. The programmable hundred kV-level high-voltage pulse generation system based on time delay control according to claim 1, wherein the power synthesizer has high power capacity, excellent insertion loss and high port isolation, realizes high-voltage pulse synthesis and has high synthesis efficiency.
5. The delay control-based programming hundred kV high voltage pulse generating system according to claim 1, wherein the number of stages of the multistage cascade and the number of stages of the power combiner are flexibly selected and combined without specific limitation.
6. A method of high voltage pulse synthesis using a programmed hundred kV high voltage pulse generation system based on time delay control according to claim 1, comprising the steps of:
Step 1, programming a delay chip according to a target high-voltage pulse waveform parameter which is required to be obtained, and setting delay for each pulse source unit according to a delay setting sequence obtained by calculation in a trigger control system after calculating a delay setting sequence of each path of high-voltage pulse signal;
Step 2, the trigger control system starts to work, a trigger control signal with a set time delay is output to trigger each pulse source unit, and each pulse source unit receives the trigger signal from the trigger control system and then outputs a high-voltage pulse signal with the set time delay;
And 3, outputting high-voltage pulse signals by each pulse source unit, and outputting the high-voltage pulse signals after synthesizing by a multi-stage multipath power synthesizer to obtain target-voltage pulse signals.
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| CN114665845B (en) * | 2022-03-01 | 2023-12-22 | 电子科技大学 | High-peak power pulse source based on high-voltage triggering and power synthesis |
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