Projekter pr. år
Abstrakt
This paper presents a modified dq impedance model of the threephase voltage source gridconnected inverter (GCI)grid system considering coupling effect between GCI part and grid part for smallsignal stability analysis. Steadystate terminal voltage and current information of the GCI part which are necessary in conventional dq impedance modelling methods are calculated based on grid parameters, i.e., grid voltage and grid impedance, and current references of currentcontrolled GCI or power references of powercontrolled GCI. In addition, effects of dynamics of grid voltage and phaselocked loop (PLL) on dq impedance characteristics of grid part are also investigated, which enables the modified dq impedance model of grid part to relate with that of GCI part. The modified dq impedance model of the GCI part which takes the effects of grid voltage and grid impedance into account need not know steadystate terminal voltage and current information. In addition, the modified dq impedance model of grid part may provide accurate stability analysis during grid voltage changes. The insight of instability mechanism of the GCIgrid coupling system may be facilitated using the modified dq impedance models. Simulation results are given to validate correctness of the proposed dq impedance model of the GCIgrid system, and effectiveness of the dq impedance model for stability analysis.
Originalsprog  Engelsk 

Titel  Proceedings of 2020 IEEE Applied Power Electronics Conference and Exposition (APEC) 
Antal sider  6 
Forlag  IEEE Press 
Status  Accepteret/In press  jan. 2020 
Begivenhed  2020 IEEE Applied Power Electronics Conference and Exposition (APEC)  New Orleans, LA, USA Varighed: 15 mar. 2020 → 19 mar. 2020 
Konference
Konference  2020 IEEE Applied Power Electronics Conference and Exposition (APEC) 

Land  USA 
By  New Orleans, LA 
Periode  15/03/2020 → 19/03/2020 
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Projekter
 1 Igangværende

COPE: Voltage Control and Protection for a Grid towards 100 Power Electronics and Cable Network
Chen, Z., Fang, J., Su, C. & Miltersen, A. H.
01/10/2017 → 03/12/2020
Projekter: Projekt › Forskning