【摘要】 介绍了一种新型MOA(金属氧化物避雷器)泄漏电流测试仪的研制。以MCU+浮点型DSP为硬件核心,软件上采用加窗、插值的高精度FFT算法,提高了非同步采样时泄漏电流中阻性电流基波分量的测试精度。实验证明,该测试仪准确度高、工作稳定、抗干扰能力强,所测结果能更好地反映MOA工作状态。更多还原

【Abstract】 A new model of leakage current tester of MOA(metal oxide arrester)is introduced.Based on the hardware of MCU and floating DSP,the software utilizes the windows and interpolated FFT algorithm,which can improve the measure precision of fundamental frequency component of resistive leakage current caused by unsynchronized sampling.It is proved by experiments that the tester is stable,of high precision and it also reveals well resistance against interference.What the tester gets can more preciously represent the working condition of MOA.更多还原