适用于电力杆塔缺陷检测的大功率脉冲电源

Research on high-power pulsed power supply used for defect detection of power tower

提出一种用于电力杆塔缺陷检测脉冲电源拓扑及其样机实现。该脉冲电源的拓扑采用新型开关器件,可满足脉冲快速、可调需求。电力杆塔缺陷检测需要在几十千伏的电压下产生具有亚纳秒上升时间的脉冲电源,为实现这一点,将传统脉冲电源引入固态开关器件。所提出的脉冲电源设计为由多个堆叠的同轴层组成的拓扑结构,其中每层由包含多个开关器件的印刷电路板(PCB)组成。然后,对所提出的脉冲电源进行3D电磁仿真分析,并设计5 kV脉冲电源样机,测试样机在2.5 kV、50Ω负载下可实现6 ns的脉冲上升时间,验证所提电源能够产生灵活脉冲波形,从而验证所提出设计方法的有效性。

This paper proposes a pulse power topology and its prototype implementation for power tower defect detection.The pulse power topology adopts new switching devices,which can meet the requirements of fast and adjustable pulse Defect detection of power poles and towers requires the generation of pulsed power supplies with sub-nanosecond rise times at voltages of tens of kilovolts.To achieve this,traditional pulsed power supplies are introduced into solid-state switching devices.The proposed pulsed power supply is designed as the topology structure which consists of multiple stacked coaxial layers,where each layer consists of a printed circuit board(PCB)containing multiple switching devices.Then,the 3 D electromagnetic simulation analysis of the proposed pulse power supply is carried out,and a 5 kV pulse power supply prototype is designed.The test prototype can achieve a pulse rise time of 6 ns under a load of 2.5 kV and 50Ω,verifying that the proposed power supply can generate flexible pulse waveforms,verifying the effectiveness of the proposed design method.