基于自耦调压器的电压暂降发生器研究

摘要

In order to test the performance of electrical equipment or measure the working status of electrical equipment by the voltage sag in the work of interference, it is necessary to make a kind of voltage sag generator which can simulate grid generating voltage sag. A kind of voltage sag generator solution scheme which is composed of autotransformer and full-controlled AC electronic switch is presented.This scheme makes use of DSP as the controller,adopting four-step commutation strategy for full-controlled AC electronic switch of commutation control. And a new type of drive and protection circuit is designed for the full-controlled AC electronic switch. Experiments show the speed and effectiveness of the system.%为检验用户电力设备的性能,或者测试电气设备在受到电压暂降干扰时的工作情况,需要一种电压暂降发生器来模拟电网产生电压暂降.在此提出了了一种由自耦调压器和全控型交流电子开关构成的电压暂降发生器解决方案.该方案用DSP作控制器,采用四步换流策略实现对全控型交流电子开关的换流控制,并为全控型交流电子开关设计了新型的驱动与保护电路.实验证明,该系统具有快速性与有效性.