Digital PLL control for single-phase photovoltaic system

被引：100

作者：

Choi, JW ^{[1
]}

Kim, YK ^{[1
]}

Kim, HG ^{[1
]}

机构：

[1] Kyungpook Natl Univ, Sch Elect & Elect Engn, Taegu, South Korea

来源：

IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS | 2006年 / 153卷 / 01期

关键词：

D O I：

10.1049/ip-epa:20045225

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：

Utility-voltage information, such as the frequency, phase angle and amplitude, is very important in many industrial systems. In a three-phase system, the utility-voltage information can easily be obtained using a utility-voltage vector, as the magnitude and angle of the voltage vector indicate the amplitude and angle of the utility voltage, respectively. However, for a single-phase system, the utility-voltage information is much more difficult to acquire. Conventionally, the frequency and phase angle of a single-phase voltage are obtained by detecting the zero-cross point. Yet, this method cannot provide the utility-voltage information instantaneously and is very sensitive to noise. Accordingly, the paper presents a novel digital phase-locked loop (PLL) algorithm for single-phase photovoltaic systems. The algorithm uses two virtual phases, and its performance is demonstrated under various utility conditions to show the effectiveness of the proposed algorithm.

引用

页码：40 / 46

页数：7