全固态纳秒脉冲发生器控制系统设计

Designing of Control System for Solid-state Nanosecond Pulse Generator

应用脉冲频率响应法检测电力变压器绕组变形,需要脉冲发生器作为检测系统激励[1-2]。基于FPGA的多参数可调全固态纳秒级脉冲发生器是众多脉冲发生器中较为先进的一种,FPGA控制系统作为此种脉冲发生器的控制核心,具有调控脉冲电压幅值,控制脉冲重复频率与宽度以及系统过流保护等功能。设计合理的控制电路对整个脉冲发生器性能优劣起到至关重要的作用。针对此脉冲发生器的控制电路重点分析了脉冲发生器的脉冲触发控制,电压控制设计以及过流保护控制等三部分功能。最后通过实验结果证明在此控制电路控制下脉冲发生器可调整脉冲参数,系统安全性较高。为进一步利用脉冲频率响应法检测变压器绕组变形奠定了基础。

s： In order to apply the pulse response method to detect the power transformer winding deformation, the pulse generator was needed as the input of detection system. Based on FPGA multi-parameter tunable solid-state nanosecond pulse generator was an advanced kind of many type of pulse generator, FPGA control system was the most important part of this pulse generator. It could control the pulse voltage amplitude, it had the functions of over-current protection and adjustment the pulse frequency and width. Reasonable control system played an important role in the performance index of pulse generator. The topic mainly analyzed the trigger circuit, voltage control, over-current protection control of the pulse generator control circuit. Finally, the experiment showed that the pulse generator could adjust pulse parameters under the control of FPGA control circuit. The system offered the superior security. The pulse generator established the foundation for further study in transformer winding deformation with the pulse response method.