Online Condition Monitoring System for DC-Link Capacitor in Industrial Power Converters
Online Condition Monitoring System for DC-Link Capacitor in Industrial Power Converters
复制标题
工业电源转换器中直流链路电容器的在线状态监测系统
DOI：
10.1109/tia.2018.2845889
复制
发表时间：
2018
影响因子：
4.4
通讯作者：
R. Simanjorang
中科院分区：
文献类型：
--
作者：
Prasanth Sundararajan;M. Sathik;F. Sasongko;C. S. Tan;M. Tariq;R. Simanjorang
提出了一种工业电源变流器直流侧铝电解电容器状态在线监测系统。电解电容器是电力变换系统中最脆弱的部件之一，由于其磨损故障和使用寿命短。因此，使用铝电解电容器的状态监控系统可以执行预防性维护，从而避免意外停机和停机时间。铝电解电容器的主要磨损机制是等效串联电阻增大。因此，本文提出的状态监测系统是基于直流侧电容器电压和电流的开关频率分量在线估计电容器的等值串联电阻。利用PSPICE电路仿真器对等效串联电阻估计方法进行了测试，并用定制的逆变器进行了实验验证。最后，将等效串联电阻估计法应用于工业电力变流器中电容器的状态监测，并在一个商用交流传动系统中实现了该状态监测系统，验证了该方法在工业电力变流器中的适用性。
This paper proposes an online condition monitoring system for aluminum electrolytic capacitors used as dc-link capacitors in industrial power converters. Electrolytic capacitors are one of the most fragile components of a power converter system because of their wear-out failures and short lifespan. Therefore, the use of condition monitoring systems for aluminum electrolytic capacitors allow preventive maintenance to be performed, thereby avoiding unexpected shutdown and downtime. The dominant wear-out mechanisms in aluminum electrolytic capacitors are characterized by the increase in equivalent series resistance. Hence, the condition monitoring system proposed in this paper is based on the online estimation of the capacitor's equivalent series resistance using the switching frequency components of the dc-link capacitor voltage and current. The equivalent series resistance estimation method is tested using the PSpice circuit simulator and is validated experimentally using a custom-made inverter. Finally, the equivalent series resistance estimation method is adapted for the condition monitoring of capacitors in industrial power converters and the proposed condition monitoring system is implemented in a commercial ac drive system to prove the applicability of the proposed method to industrial power converters.