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某型直升机雷达系统在训练过程中,频繁发生设备过载和电源过载等故障,暴露出飞机电源系统与雷达系统存在较为严重的适配问题。以往,对于飞机电源系统进行分析通常是采用试验的方法,但是,需要投入大量的人力物力和财力,并且还存在可能烧坏电机设备的问题。因此,采用数字仿真技术,以雷达系统作为负载,研究电源适配性,具有比较大的现实应用意义。通过对某型直升机电力滤波器模型进行仿真,分别介绍了有源电力滤波器中对于谐波电流的检测的方法,i_p、i_q运算方式的选择原因,并且解决了此方法不适用于三相四线制的问题,运用滞环比较法控制策略,对电力电子开关进行控制,实现滤除谐波的功用。
Some type of helicopter radar system in the training process, frequent equipment overload and power overload and other failures, exposing the aircraft power system and radar system there is a serious problem of adaptation. In the past, the analysis of aircraft power systems was usually conducted experimentally. However, a large amount of manpower, material resources and financial resources were required, and there was also a problem that electrical equipment might be burned out. Therefore, the use of digital simulation technology to radar system as a load, the study of power adaptability, with greater practical significance. By simulating the model of a helicopter power filter, this paper introduces the methods of harmonic current detection in active power filter and the reason of selecting i_p and i_q modes respectively. It also solves the problem that this method is not suitable for three phase four Line system, the use of hysteresis comparison of control strategies to control the power electronic switch, to achieve the function of filtering out harmonics.