摘要
逆变器的直流母线通常使用电解电容器消纳开关过程中的瞬时能量,在电网电压穿越时缓冲能量冲击。电解电容器必须降额使用以保证逆变器的寿命满足标准。针对这一问题,深入研究了薄膜电容器与电解电容器混合使用的混合型直流母线电容。通过使用高性能的薄膜电容吸收纹波电流中的高频分量,有效减小了电解电容器的温升,从而提高了电解电容的寿命。仿真和实验结果有效地支持了这一结论。
Electrolytic capacitors are the common selection in inverters'DC-link for absorbing energy during switching transient and buffering power surge during grid ride-through.Electrolytic capacitors must be derating in order to accomplish the life time requirement of inverters.The hybrid DC-link capacitor bank which combines electrolytic capacitors and film capacitors were investigated for this issue.In the proposed hybrid DC-link capacitor bank,ripple currents were handled by the high-performance film capacitor,which leads to lower temperature rise in electrolytic capacitors,and life time of electrlytic capacitor extension is obtained.Simulation and experiments results effectivel support this conclusion.
作者
倪峰
李飞
王倩
NI Feng;LI Fei;WANG Qian(School of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,Shaanxi,China;Bomay Electric Industries Company Limited,Xi’an 710077,Shaanxi,China)
出处
《电气传动》
北大核心
2020年第11期83-88,共6页
Electric Drive
基金
国家自然科学基金(51507135)。
关键词
逆变器
直流母线
电解电容
薄膜电容
寿命
inverter
DC-link
electrolytic capacitor
film capacitor
life time
