Design On Monitoring And Control System For Pulse Forming Network

High pulsed power technology is one of the front high technology in the world and has extensive application prospects. Mainly, pulsed power system is made up of primary energy, power conditioning system, energy storage units, pulse forming network (PFN), switches and loads, etc. The PFN and discharging pulse current monitoring system are analyzed and researched in great details.The importance that the PFN discharging currents should be supervised is proposed while the drawbacks of the traditional PFN discharging current acquisition methods are proposed. The operation principle of Rogowski coils is presented and the advantages that Rogowski coils have wider measurement frequency spectrum, broader dynamic spectrum and wider bandwidth are proposed. Two kinds of Rogowski coil output integration circuits are introduced, then their performance are compared with each other.The design principles for driving pulse width and pulse frequency are proposed, then the charging voltage inspecting circuit and the charging current inspecting circuit are designed. Based on the primary signal conditioning circuit for the Rogowski coils, a multi-channel high speed data acquisition system is designed using A/D, FIFO, SRAM and DSP. The system has a very high data aquisition frequency and accuracy. It realizes real-time detecting of multi-channel currents and high speed monitoring of PFN operating state.The system solves the problems confronted with the traditional PFN current measurement methods and it is possessed of many new functions.The switch triggering subsystem software is designed as well as the current measurement subsystem software . The anti-interference ability of the software is improved by adopting some methods. The simulation models of the PFN are established. Based on the experiment prototype, a series of charging and discharging experiments are executed using multiple PFN modules and the experimental results are presented. The experimental results indicate that the system design is correct and reliable.