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

被引：10
|
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
收藏
页码：2692 / 2705
页数：14
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