电缆检测用高压发生器的仿真分析与对比研究

Simulation Analysis and Comparative Study of High Voltage Generator for Cable Inspection

交联聚乙烯电缆的定时检测,在电力系统中的运行当中是极其重要的一环,但是,针对交联聚乙烯电缆材料的特殊性,传统的直流耐压试验方法,及工频耐压实验方式无法准确测量。为了解决这个问题,一种新型的检测方式——0.1 Hz超低频试验技术得到了广泛应用。本文选取了2种0.1 Hz超低频高压发生器的电路,分别为共轭双调幅式0.1 Hz超低频正弦波高压发生器与级联多电平逆变器式0.1 Hz超低频高压发生器,对2种方案进行了Matlab/Simulink仿真验证,并对结果进行分析,最后对2种高压发生器的优缺点进行比较。

The timing detection of XLPE cable is an extremely important part in the operation of power system.However,due to the particularity of XLPE cable material,the traditional DC withstand voltage test method and the power frequency withstand voltage test method can not accurately measure.In order to solve this problem,a new detection method,0.1 Hz ultra-low frequency test technology,has been widely used.In this paper,two kinds of 0.1 Hz ultra-low frequency high voltage generator are selected,which are conjugate double amplitude modulation 0.1 Hz ultra-low frequency sine wave high voltage generator and cascaded multi-level inverter type 0.1 Hz ultra-low frequency high voltage generator.The two schemes are simulated and verified by Matlab/Simulink,and the results are analyzed.Finally,the advantages and disadvantages of the two high-voltage generators are compared.