An Impedance-Based Stability Analysis Method for Paralleled Voltage Source Converters

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Abstrakt

This paper analyses the stability of paralleled voltage source converters in AC distributed power systems. An impedance-based stability analysis method is presented based on the Nyquist criterion for multiloop system. Instead of deriving the impedance ratio as usual, the system stability is assessed based on a series of Nyquist diagrams drawn for the terminal impedance of each converter. Thus, the effect of the right half-plane zeros of terminal impedances in the derivation of impedance ratio for paralleled source-source converters is avoided. The interaction between the terminal impedance of converter and the passive network can also be predicted by the Nyquist diagrams. This method is applied to evaluate the current and voltage controller interactions of converters in both grid-connected and islanded operations. Simulations and experimental results verify the effectiveness of theoretical analysis.
OriginalsprogEngelsk
TitelProceedings of the 2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE-Asia)
Antal sider7
ForlagIEEE Press
Publikationsdato2014
Sider1529-1535
DOI
StatusUdgivet - 2014
Begivenhed2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE-ASIA) - Hiroshima, Japan
Varighed: 18 maj 201421 maj 2014

Konference

Konference2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE-ASIA)
LandJapan
ByHiroshima
Periode18/05/201421/05/2014

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