Estimation of an Unbalanced Grid Impedance Using a Three-Phase Power Converter

被引：0
|
作者：
Kukkola, Jarno [1 ]
Pirsto, Ville [1 ]
Routimo, Mikko [1 ]
Hinkkanen, Marko [1 ]
机构：
[1] Aalto Univ, Dept Elect Engn & Automat, Espoo, Finland
来源：
2020 22ND EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'20 ECCE EUROPE) | 2020年
关键词：
Converter control; Estimation technique; Impedance measurement; Three-phase system; IDENTIFICATION; SIGNALS;
D O I：
10.23919/epe20ecceeurope43536.2020.9215676
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
This paper proposes a real-time method for estimating an unbalanced grid impedance using a three-phase converter. In the method, a periodic single-frequency or multi-frequency excitation signal is added to the converter voltage reference. The converter measures currents and voltages at the point of common coupling. The impedance estimate is obtained from the measurements using sliding discrete Fourier transform (SDFT). The method is experimentally validated.
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页数：10
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