航空400Hz交流电源合闸参数的数字化测量

A Digital Method for Measuring Circuit Closing Parameters of Aeronautics Alternating Power Source of 400Hz

介绍了一种测量航空 40 0 Hz交流电源合闸参数的数字化测量方法。实际测量时 ,合闸过程中的电流经过计算机数据采集系统变成数字量 ,这些数字量中包含了合闸过程中的主要参数 ,如稳态电流 ,合闸初始相角和负载功率因数角。由于交流合闸过程中电流变化规律已知 ,因此 ,采用非线性最小二乘法可以由这些数字量拟合出上述参数。根据这些参数 ,一方面能推断出合闸过程中电流最大值 ,了解电磁干扰和电动力破坏的程度 ;另一方面 ,可给出实际负载下的最佳合闸初相角。

A digital method for measuring circuit closing parameters of 400Hz aeronautics alternating power source is introduced. During measuring procedure, the circuit closing current value has been changed into digital through the computer data sample system, the main circuit closing parameters are included in these digital information, such as steady state current value, initial circuit closing angle phase and load power factor angle. During the circuit closing, the current law is known, so the circuit closing parameters could be deduced out by the way of non-linear least square method. According to these parameters, the maximum closing circuit current and its effect of electromagnetic disturbance and also its effect of electric forces could be analyzed in detail; on the other hand, the optimal circuit closing initial phase angle could be known with the factual load.