变频谐振试验电压下介质损耗测量技术研究

Research on the Dissipation Factor Measurement Technique for the Variable Frequency Test

采用准同步采样谐波分析方法，对变频（30—300Hz）谐振电压下介质损耗测量技术进行了研究．探讨了测量信号的提取方法，对相应的算法进行了理论推导与计算机仿真分析，介绍了测量电路原理，并进行了实验测试．结果表明，该方法具有测量准确度高、抗干扰能力强等特点，可广泛地应用于频率变化情况下，电气设备的介质损耗测量．

Using the quasi-synchronous sampling harmonic analysis method, the paper researches on the dissipation factor measurement technique for the variable frequency （30 - 300Hz） test. The measurement signal pick-up method is discussed, the academic calculation and computer-aided analysis of the algorithm is made out, the principle of the circuit is presented, and the experiment is carried out. It is found that the method has advantages of high veracity and better anti-jamming characters, which can be widely used in the dissipation factor measurement of the electrical equipment in the frequency-varied instance.