TY - GEN
T1 - Use of Boundary Control with Second-Order Switching Surface to Reduce the System Order for Deadbeat Controller in Grid-Connected Inverter
AU - He, Yuanbin
AU - CHUNG, Henry Shu-hung
PY - 2015
Y1 - 2015
N2 - This paper introduces a new perspective of using boundary control with second-order switching surface to decouple the LCL filter into an 'LC' + L structure to control the output current of a grid-connected inverter. The boundary control (inner loop) converts the switching network together with the 'LC' filter into a first-order delay term. Then, the deadbeat control (outer loop) deals with the low-order system, including the first-order delay term and the 'L' filter to regulate the output current. Mathematical modeling will be studied. A simple online grid inductance estimation algorithm will be proposed to assure sufficient phase margin under an extremely weak-grid condition. A 2 kW, 220V, 50Hz prototype with the switching frequency of 8 kHz has been built and evaluated. ©2015 IEEE.
AB - This paper introduces a new perspective of using boundary control with second-order switching surface to decouple the LCL filter into an 'LC' + L structure to control the output current of a grid-connected inverter. The boundary control (inner loop) converts the switching network together with the 'LC' filter into a first-order delay term. Then, the deadbeat control (outer loop) deals with the low-order system, including the first-order delay term and the 'L' filter to regulate the output current. Mathematical modeling will be studied. A simple online grid inductance estimation algorithm will be proposed to assure sufficient phase margin under an extremely weak-grid condition. A 2 kW, 220V, 50Hz prototype with the switching frequency of 8 kHz has been built and evaluated. ©2015 IEEE.
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84963606506&origin=recordpage
U2 - 10.1109/ECCE.2015.7310383
DO - 10.1109/ECCE.2015.7310383
M3 - RGC 32 - Refereed conference paper (with host publication)
T3 - IEEE Energy Conversion Congress and Exposition
SP - 5129
EP - 5136
BT - 2015 IEEE Energy Conversion Congress and Exposition (ECCE)
PB - IEEE
T2 - 7th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2015)
Y2 - 20 September 2015 through 24 September 2015
ER -