TY - GEN
T1 - Stability analysis of cascaded converters for bidirectional power flow applications
AU - Krishnamurthy, Harish
AU - Ayyanar, Raja
PY - 2008/12/30
Y1 - 2008/12/30
N2 - This paper establishes the criteria to ensure stable operation of two-stage, bidirectional, isolated ac-dc converters. The bi-directional converter is analyzed in the context of a building block module (BBM) that enables a fully modular architecture for universal power flow conversion applications (AC-DC, DC-AC and DC-DC). The BBM consists of independently controlled ac-dc and isolated dc-dc converters that are cascaded for bidirectional power flow applications. The cascaded converters have different control objectives in different directions of power flow. This paper discusses methods to obtain the appropriate input and output impedances that determine stability in the context of bi-directional ac-dc power conversion. Design procedures to ensure stable operation with minimal interaction between the cascaded stages are presented. The analysis and design methods are validated through extensive simulation and hardware results.
AB - This paper establishes the criteria to ensure stable operation of two-stage, bidirectional, isolated ac-dc converters. The bi-directional converter is analyzed in the context of a building block module (BBM) that enables a fully modular architecture for universal power flow conversion applications (AC-DC, DC-AC and DC-DC). The BBM consists of independently controlled ac-dc and isolated dc-dc converters that are cascaded for bidirectional power flow applications. The cascaded converters have different control objectives in different directions of power flow. This paper discusses methods to obtain the appropriate input and output impedances that determine stability in the context of bi-directional ac-dc power conversion. Design procedures to ensure stable operation with minimal interaction between the cascaded stages are presented. The analysis and design methods are validated through extensive simulation and hardware results.
KW - Bidirectional power flow
KW - Cascaded systems
KW - Input and output impedance
KW - Stability
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U2 - 10.1109/INTLEC.2008.4664032
DO - 10.1109/INTLEC.2008.4664032
M3 - Conference contribution
AN - SCOPUS:57949117332
SN - 9781424420568
T3 - INTELEC, International Telecommunications Energy Conference (Proceedings)
BT - INTELEC 2008
T2 - 30th Annual International Telecommunications Energy Conference, INTELEC 2008
Y2 - 14 September 2008 through 18 September 2008
ER -