TY - GEN
T1 - Stabilizing Switching Control for DC- DC Converter in Two-Stage Photovoltaic Grid Connected Inverters
AU - Liu, Yuwen
AU - Wang, Tao
AU - Wang, Xijun
AU - Xiang, Weiming
N1 - Funding Information:
This work is supported by the National Natural Science Foundation of China (51477146) and(61603312)
PY - 2018/12/10
Y1 - 2018/12/10
N2 - In photovoltaic system, the maximum power point tracking technology (MPPT)makes the input voltage and current of the pre-stage DC-DC converter in a two-stage grid connected inverter variable because of external factors such as light and temperature. In order to improve the stability of pre-stage boost converter under variable input, a switching liner parameter varying (LPV)model of boost converter is established. Based on the established model, a stable switching signal of boost converter is derived from Lyapunov stability criterion of nonlinear stability analysis. Then a new control strategy of boost converter is designed by the switching signal. Based on the bifurcation theory, the stability of the control model is analyzed. The results show that the control strategy can make the boost converter output the voltage with less ripple, and the analysis of a series of bifurcation diagrams shows that the boost converter will not be unstable under the control strategy. Finally, the theoretical results are verified by simulation.
AB - In photovoltaic system, the maximum power point tracking technology (MPPT)makes the input voltage and current of the pre-stage DC-DC converter in a two-stage grid connected inverter variable because of external factors such as light and temperature. In order to improve the stability of pre-stage boost converter under variable input, a switching liner parameter varying (LPV)model of boost converter is established. Based on the established model, a stable switching signal of boost converter is derived from Lyapunov stability criterion of nonlinear stability analysis. Then a new control strategy of boost converter is designed by the switching signal. Based on the bifurcation theory, the stability of the control model is analyzed. The results show that the control strategy can make the boost converter output the voltage with less ripple, and the analysis of a series of bifurcation diagrams shows that the boost converter will not be unstable under the control strategy. Finally, the theoretical results are verified by simulation.
KW - Switching LPV modeling
KW - Two-stage Photovoltaic Grid Connected Inverters
KW - bifurcation
KW - nonlinear system stability
KW - numerical analysis
UR - http://www.scopus.com/inward/record.url?scp=85060271490&partnerID=8YFLogxK
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U2 - 10.1109/ICCSS.2018.8572323
DO - 10.1109/ICCSS.2018.8572323
M3 - Conference contribution
AN - SCOPUS:85060271490
T3 - 2018 International Conference on Information, Cybernetics, and Computational Social Systems, ICCSS 2018
SP - 387
EP - 392
BT - 2018 International Conference on Information, Cybernetics, and Computational Social Systems, ICCSS 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 5th International Conference on Information, Cybernetics, and Computational Social Systems, ICCSS 2018
Y2 - 16 August 2018 through 19 August 2018
ER -
