High-Performance Grid Simulator Using Parallel Structure Fractional Repetitive Control

• Published in: IEEE transactions on power electronics Vol. 31; no. 3; pp. 2669 - 2679
• Main Authors: Liu, Tianqi, Wang, Danwei, Zhou, Keliang
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.03.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Accuracy; Control systems; Controllers; Criteria; Delay; Delays; fractional repetitive control; Frequencies; Frequency control; Generators; Grid simulator; Harmonic analysis; Harmonics; Inverters; power perturbations; Pulse width modulation; PWM inverters; Repetitive control; Repetitive controllers; Simulation; Simulators; Tracking; tracking accuracy; Transient responses; Voltage fluctuations; Fractional repetitive control; pulse width modulation (PWM) inverters; tracking accuracy; grid simulator; power perturbations
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2015.2441732

In this paper, a high-performance grid simulator based on a parallel structure fractional repetitive control scheme is employed to emulate various operation scenarios of power grids for testing power products. In this paper, a simple fractional repetitive control scheme is proposed for grid simulators to achieve high-accuracy tracking performance. Using parallel branches, the proposed repetitive controller can flexibly select the interested harmonics for compensation, and independently, tune the convergency rate at selective harmonic frequencies. Compared with the conventional repetitive control, the proposed control scheme achieves faster transient response. Moreover, the number of delay units required in the proposed repetitive controller is reduced to at least half of that in a conventional repetitive controller. Design process and stability criteria are presented in details. A set of experimental results is provided to verify the effectiveness of the proposed approach.