Nonlinear Observer-Based Robust Passive Control of Doubly-Fed Induction Generators for Power System Stability Enhancement via Energy Reshaping

Jun Dong, Shengnan Li, Shuijun Wu, Tingyi He, Bo Yang, Hongchun Shu and Jilai Yu
Additional contact information
Jun Dong: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Shengnan Li: Electric Power Research Institute of Yunnan Power Grid Co., Ltd., Kunming 650217, China
Shuijun Wu: Electric Power Research Institute of Yunnan Power Grid Co., Ltd., Kunming 650217, China
Tingyi He: Electric Power Research Institute of Yunnan Power Grid Co., Ltd., Kunming 650217, China
Bo Yang: Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
Hongchun Shu: Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
Jilai Yu: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China

Energies, 2017, vol. 10, issue 8, 1-16

Abstract: The large-scale penetration of wind power might lead to degradation of the power system stability due to its inherent feature of randomness. Hence, proper control designs which can effectively handle various uncertainties become very crucial. This paper designs a novel robust passive control (RPC) scheme of a doubly-fed induction generator (DFIG) for power system stability enhancement. The combinatorial effect of generator nonlinearities and parameter uncertainties, unmodelled dynamics, wind speed randomness, is aggregated into a perturbation, which is rapidly estimated by a nonlinear extended state observer (ESO) in real-time. Then, the perturbation estimate is fully compensated by a robust passive controller to realize a globally consistent control performance, in which the energy of the closed-loop system is carefully reshaped through output feedback passification, such that a considerable system damping can be injected to improve the transient responses of DFIG in various operation conditions of power systems. Six case studies are carried out while simulation results verify that RPC can rapidly stabilize the disturbed DFIG system much faster with less overshoot, as well as supress power oscillations more effectively compared to that of linear proportional-integral-derivative (PID) control and nonlinear feedback linearization control (FLC).

Keywords: robust passive control; nonlinear observer; stability enhancement; energy reshaping (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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