Robustness Improvement of Superconducting Magnetic Energy Storage System in Microgrids Using an Energy Shaping Passivity-Based Control Strategy

Superconducting magnetic energy storage (SMES) systems, in which the proportional-integral (PI) method is usually used to control the SMESs, have been used in microgrids for improving the control performance. However, the robustness of PI-based SMES controllers may be unsatisfactory due to the high...

Full description

Saved in:
Bibliographic Details
Published in:Energies (Basel) 2017-05, Vol.10 (5), p.671
Main Authors: Hou, Rui, Song, Huihui, Nguyen, Thai-Thanh, Qu, Yanbin, Kim, Hak-Man
Format: Article
Language:English
Subjects:
Control systems
Controllers
Damping
Design analysis
Design engineering
Design improvements
Direct current
Eddy currents
Electric power grids
Electric utilities
Energy consumption
Energy management
energy shaping passivity (ESP)-based control
Energy storage
Harmonics
Magnetic energy storage
microgrid (MG)
Nonlinearity
Passivity
renewable power generation
Simulation
Strategy
superconducting magnetic energy storage (SMES)
Superconductivity
Systems analysis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Superconducting magnetic energy storage (SMES) systems, in which the proportional-integral (PI) method is usually used to control the SMESs, have been used in microgrids for improving the control performance. However, the robustness of PI-based SMES controllers may be unsatisfactory due to the high nonlinearity and coupling of the SMES system. In this study, the energy shaping passivity (ESP)-based control strategy, which is a novel nonlinear control based on the methodology of interconnection and damping assignment (IDA), is proposed for robustness improvement of SMES systems. A step-by-step design of the ESP-based method considering the robustness of SMES systems is presented. A comparative analysis of the performance between ESP-based and PI control strategies is shown. Simulation and experimental results prove that the ESP-based strategy achieves the stronger robustness toward the system parameter uncertainties than the conventional PI control. Besides, the use of ESP-based control method can reduce the eddy current losses of a SMES system due to the significant reduction of 2nd and 3rd harmonics of superconducting coil DC current.
ISSN:1996-1073
1996-1073
DOI:10.3390/en10050671