Power Flow Stabilization and Control of Microgrid with Wind Generation by Superconducting Magnetic Energy Storage

MOLINA, MARCELO GUSTAVO; MERCADO, PEDRO ENRIQUE

IEEE TRANSACTIONS ON POWER ELECTRONICS

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: Piscataway, Nueva Jersey, EE.UU.; Año: 2011 vol. 23 p. 910 - 922

0885-8993

High penetration of renewable energy sources such as wind generation in microgrids (MGs) causes fluctuations of power flow and significantly affects the power system operation. This can lead to severe problems, such as system frequency oscillations, and/or violations of power lines capability. With the proper control, superconducting magnetic energy storage (SMES) is able to significantly enhance the dynamic security of the power system. In a SMES system, the power conditioning system (PCS) is the crucial component that directly influences the validity of the SMES in the dynamic control of the power system. This paper proposes the use of an improved SMES controller for the stabilization and control of the power flow of wind-hybrid MGs. In this sense, the design and implementation of a novel high performance PCS scheme of the SMES is described. Moreover, a detailed model of the SMES unit is derived and a novel three-level control scheme is designed, comprising a full decoupled current control strategy in the d-q reference frame and an enhanced power system frequency controller. The dynamic performance of the proposed systems is fully validated by computer simulation.