By injecting low-frequency voltage signals of different frequencies into cables based on the AC injection method,you can measure the response current,calculate the cable resistance to the ground and the cable capacitance,and effectively identify the insulation fault and predict the cable life.The STM32F103 chip is used as the control core of the system,and low-voltage signals with adjustable frequency are injected into each phase line through low-frequency AC power supply.Through the extraction and analysis of current signals,cable parameters and low-frequency dielectric loss Angle are obtained.After a long time of actual operation test,the cable insulation monitor based on multi-frequency signal injection method is the most accurate measurement,reliable and effective device.
关键词
绝缘检测/介质损耗角/多频法
Key words
insulation detection/dielectric loss angle/Multifrequency method
维普
万方数据