基于同一化方法的绕组直流电阻测量方法

摘要

研究了一种针对发电机、变压器等故障的快速测量感性绕组直流电阻的方法。当测试不同设备时，一个直流电源及一个大电阻与被测绕组串联组成测量回路，调大电阻的阻值及直流电源的电压，使测量回路的时间常数是定值并使绕组的电流值相同，可避免电流微小变化而产生的测量误差。基于上述原理的测量装置表明所提方法是可行的。%A method for fast measuring the direct current resistances of inductive coils is studied when there are faults existing in transformer, generator etc. A large resistance is connected in series with the measured coil, thus time constant of the coil is a fixed value and current value of the coil is same when measuring different apparatuses. So the measuring error caused by little change in current is avoided. The measurement device based on this principle shows that the proposed method is practicable.