Identification of DC-Link Capacitance for Single-Phase AC/DC PWM Converters

被引：11
|
作者：
Pu, Xing-Si [1 ]
Nguyen, Thanh Hai [1 ]
Lee, Dong-Choon [1 ]
Lee, Suk-Gyu [1 ]
机构：
[1] Yeungnam Univ, Dept Elect Engn, Gyeongbuk, South Korea
来源：
JOURNAL OF POWER ELECTRONICS | 2010年 / 10卷 / 03期
关键词：
Capacitance estimation; Digital filter; PR-controller; PWM converters; ELECTROLYTIC CAPACITORS; PREDICTION;
D O I：
10.6113/JPE.2010.10.3.270
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：
In this paper, a capacitance estimation scheme for DC-link capacitors for single-phase AC/DC PWM converters is proposed. Under the no-load condition, a controlled AC current (30[Hz]) is injected into the input side, which then causes AC voltage ripples at the DC output side. Or, a controlled AC voltage can be directly injected into the DC output side. By extracting the AC voltage/current and power components on the DC output side using digital filters, the capacitance value can be calculated, where the recursive least squares (RLS) algorithm is used. The proposed methods can be simply implemented with software only and additional hardware is not required. From the experiment results, a high accuracy estimation of capacitances less than 0.85% has been obtained.
引用
收藏
页码：270 / 276
页数：7
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