Online capacitance estimation of DC-link electrolytic capacitors for three-phase AC/DC/AC PWM converters using recursive least squares method

被引：72

作者：

Lee, DC

Lee, KJ

Seok, JK

Choi, JW

机构：

[1] Yeungnam Univ, Gyongsan 712749, Gyeongbuk, South Korea

[2] LG Philips LCD, Inverter Part, Gumi, Gyeongbuk, South Korea

[3] Kyungpook Natl Univ, Taejon, South Korea

来源：

IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS | 2005年 / 152卷 / 06期

关键词：

D O I：

10.1049/ip-epa:20050027

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel online capacitance estimation method for a DC-link capacitor in a three-phase AC/DC/AC PWM converter is prepared. At no load, a controlled AC current with a lower frequency than the fine frequency is injected into the input side, which then causes AC voltage ripples at the DC output side. By extracting the AC voltage and current components on the DC output side using digital filters, the capacitance can then be calculated using the recursive least squares method. The proposed method can be simply implemented with only software and no additional hardware. Experimental results confirm that the estimation error is less than 0.26%.

引用

页码：1503 / 1508

页数：6

共 16 条

[1] Single current sensor technique in the DC link of three-phase PWM-VS inverters: A review and a novel solution [J].