Adaptive controller based on grid impedance estimation for stable operation of grid-connected inverters under weak grid conditions

被引：13

作者：

Temiz, Hakan ^{[1
]}

Keysan, Ozan ^{[2
]}

Demirok, Erhan ^{[3
,4
]}

机构：

[1] ASELSAN, Transportat Secur Energy & Automat Syst Business, Ankara, Turkey

[2] Middle East Tech Univ, Dept Elect & Elect Engn, Ankara, Turkey

[3] Siemens Gamesa Renewable Enerji AS, Izmir, Turkey

[4] Izmir Univ Econ, Dept Elect & Elect Engn, Izmir, Turkey

来源：

IET POWER ELECTRONICS | 2020年 / 13卷 / 13期

关键词：

binary sequences; invertors; power grids; adaptive control; grid-connected inverters; weak grid conditions; electric grid; high impedance; connection point; grid-tied voltage source inverters; adaptive controller; estimated grid impedance; grid impedance estimation; impedance-based stability analysis; predetermined steady-state operation point; pseudorandom binary sequence injection; Fourier techniques; LCL-FILTER; POWER; IDENTIFICATION; SYNCHRONIZATION; PARAMETERS; STABILITY; SYSTEMS; MODEL;

D O I：

10.1049/iet-pel.2019.1411

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：

An electric grid having high impedance seen from the connection point is considered as a weak grid and it adversely affects the system stability of grid-tied voltage source inverters in renewable power devices. In this study, an adaptive controller is proposed by configuring the settling time of the phase-locked loop based on the estimated grid impedance. Pseudorandom binary sequence injection and Fourier techniques are carried out for grid impedance estimation. Impedance-based stability analysis is performed for a predetermined steady-state operation point. The proposed method is verified by a 300-kVA inverter prototype for wide-range grid impedance varying from 0.3 to 3 mH.

引用

页码：2692 / 2705

页数：14

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