1.5MV高压发生器的工艺改进和仿真计算

Technological Improvement and Simulation Calculation for 1.5 MV High Voltage Generator

为了使应用于火电厂脱硫脱硝的大功率电子加速器高压发生器能稳定运行,介绍了电子加速器的结构和高压发生器的特点,并针对高压发生器经常发生打火造成高压硅堆和跳线损坏的问题,提出和实施了以下改进措施:通过改变高压电极的设计结构改善高压电极附近电场强度的分布;增加高压硅堆管芯数量及减小高压硅堆环氧浇注层厚度。有限元仿真和高压实验的结果表明,电压的不均匀降落和高压硅堆的工艺是影响高压发生器稳定性和可靠性的原因。实施改进方案后,明显提高了高压发生器的击穿电压且达到了其设计指标,大大提高了高压发生器运行的稳定性和可靠性。

Configuration, malfunction phenomenon, reason analysis, simulation calculation and improvement method are introduced. The high voltage generator of high power electron accelerator for purification of flue gases of thermal electric field generates sulphurous oxide and nitrogen oxide. In order to solve the malfunction, the changed shape of electrode and update technology to produce high voltage diode are main improvement methods. The electric field intensity which is calculated by the finite element model and is simulated by high voltage electrode and its surrounding area is lower than breakdown value after changing shape of electrode. The voltage of high voltage generator satisfies the designing value after improvement.