A new method of on-line grid impedance estimation for PV inverter

被引：0

作者：

Asiminoaei, L ^{[1
]}

Teodorescu, R ^{[1
]}

Blaabjerg, F ^{[1
]}

Borup, U ^{[1
]}

机构：

[1] Aalborg Univ, Inst Energy Technol, DK-9220 Aalborg, Denmark

来源：

APEC 2004: NINETEENTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION, VOLS 1-3 | 2004年

关键词：

power system monitoring; grid impedance measurement; Discrete Fourier Transform; fixed point arithmetic; digital signal processors;

D O I：

暂无

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：

The recent increase in photo-voltaic (PV) installations calls for new and better power quality requirements with respect to connection to the grid supply. Therefore, different methods are typically used for continuous grid monitoring, usually by using external devices. In this paper a new method for on-line measuring the grid impedance is presented. The presented method requires no extra hardware being accommodated by typical PV inverters, sensors and CPU, to provide a fast and low cost approach of on-line impedance measurement. By injecting a non-characteristic harmonic current and measuring the voltage grid response it is possible to evaluate the grid impedance. Practical test on an existing PV inverter validate the new method.

引用

页码：1527 / 1533

页数：7

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