脉冲负载逐渐成为电力负载的发展趋势,与传统负载不同,雷达脉冲负载的典型特征是平均功率小、峰值功率大。柴油发电机组由于容量和惯性较小,负载的频繁突变会造成系统运行不稳定。文中针对脉冲负载提出了电压相对偏差率的概念和计算方式,通过设置绝缘栅双极晶体管触发信号,模拟脉冲负载的工作周期和占空比,调节电阻大小模拟雷达脉冲负载的峰值功率,详细分析了脉冲负载下系统暂态特性。基于同步发电机-整流器系统,研究了雷达脉冲负载的占空比、工作周期、峰值功率、滤波电容变化时对系统动态指标的影响规律。

The pulsed load has become a developing trend of power loading. Unlike traditional loads, pulsed load has small mean power and high peak power. Pulsed load with current abrupt and repeated charges will result in unstable microgrid operations because of their small capacity and inertia. In this paper, the relative deviation rate that characterizes the impact of pulsed load on the AC side of the grid is defined and its calculation process is described in detail. In addition, the system dynamic characteristics under a pulsed load are analyzed using an insulated gate bipolar transistor to control the on/off state of the resistive load for simulating a pulsed load. Finally, the transient characteristics of a synchronous-rectifier system with a pulsed load considering pulse width, period, peak power and capacitance are studied and validated experimentally.

TM721

国家自然青年科学基金资助项目