Modular all-solid-state waveform adjustable impulse voltage apparatus
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摘要: 提出了一种不同于传统气体球间隙的冲击电压发生器，即基于电力电子技术的小型化冲击电压发生装置。其采用模块化多电平结构，以Marx拓扑作为主回路，MOSFET作为主开关，利用MATLAB通过最近电平逼近调制算法（NLM）对雷电波、或者雷电截波进行拟合、调制，通过FPGA控制模块化冲击电压发生器，产生充电电压、波前时间、波尾时间、截断时间等可通过上位机灵活调节的冲击电压波形。测试结果表明：单个冲击电压模块最大输出电压为24 kV,共30级电压输出；5个冲击电压模块串联运行时，最高可产生150级不同电平数，峰值电压可达−100 kV的雷电波、或者雷电截波。Abstract: Common power equipment in the factory and maintenance needs lightning impact voltage testing to detect the level of insulation equipment. This paper proposes a miniaturized impulse voltage generator different from the traditional gas ball gap. It adopts a modular multi-stage structure, uses the Marx topology as the main circuit, and uses MOSFET as the main switch. MATLAB is used to fit and modulate lightning impulses or chopped lightning impulses through the nearest-level forced modulation algorithm (NLM). FPGA controls the modular impulse voltage generator to generate impulse voltage waveforms such as charging voltage, wavefront time, wave tail time, and truncation time, which the host computer can flexibly adjust. The test results show that the maximum output voltage of a single impulse voltage module is 24 kV, with a total of 30 stages of voltage output; when 5 impulse voltage modules are operated in series, a maximum of 150 stages of different voltages can be generated, and the peak voltage can reach −100 kV lightning impulses or chopped lightning impulses.
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图 1 全固态冲击电压装置组成框图
Figure 1. Block diagram of all-solid-state impulse voltage prototype
图 5 第n级放电开关Sdn未导通放电路径图
Figure 5. The nth stage-discharge switch Sdn is not conducting the discharge path diagram
图 8 模块化全固态波形可调冲击电压发生器装置图
Figure 8. Modular all-solid-state waveform adjustable impulse voltage apparatus diagram
图 15 不同电压下标准雷电波带载波形
Figure 15. Standard lightning impulse band-load waveforms at different voltages
图 16 不同波前、波尾时间带载雷电波波形
Figure 16. Lightning impulse waveforms at different front and tail times
图 18 阻容性负载输出电压电流波形图
Figure 18. Output Voltage and Current Waveforms for resistive capacitive load
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