Active damping stabilization for reduced DC-link capacitance photovoltaic water-pumping drives

Yonggao Zhang; Siyuan Ze; Peng Liu; Yinquan Yu

doi:10.1117/12.2619967

29 November 2021 Active damping stabilization for reduced DC-link capacitance photovoltaic water-pumping drives

Yonggao Zhang, Siyuan Ze, Peng Liu, Yinquan Yu

Proceedings Volume 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021); 120801T (2021) https://doi.org/10.1117/12.2619967
Event: 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 2021, Nanchang, China

Abstract

The motor drive of the photovoltaic water-pump will have a constant power load (cpl) characteristic in the closed loop system, which leads to a negative admittance effect. The interaction between LC resonance and negative admittance will affect the stability of the entire drive system. This paper establishes the LC input impedance model and the impedance model of the motor drive system, analyzes the instability of the LC input impedance and the negative impedance of the system, establishes a small signal model, and proposes an active damping feedforward method. The stability control method reshapes the input admittance, eliminates the instability of the input admittance, and suppresses the fluctuation of the DC bus voltage. The method's efficiency is confirmed by the simulation results.

Citation Download Citation

Yonggao Zhang, Siyuan Ze, Peng Liu, and Yinquan Yu "Active damping stabilization for reduced DC-link capacitance photovoltaic water-pumping drives", Proc. SPIE 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 120801T (29 November 2021); https://doi.org/10.1117/12.2619967

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